Pub Date : 2024-03-11DOI: 10.1007/s12039-023-02244-4
Richa Gupta, Kothandaraman Ramanujam
The search for better energy storage systems that are less expensive, resource-abundant, and safer has sparked intense research into zinc ion batteries (ZIBs). Organic materials, especially quinones-based ZIBs, improved the rate performances by providing structural flexibility for the movement of zinc ions. In this work, a highly conjugated quinone molecule, tetrakis-lawsone (TLS), with multiple active sites, was used to enhance the capacity of the ZIBs. The non-planar geometry of TLS due to the different orientations of all four lawsone units of TLS provided a sufficient void for the Zn2+ movement, making it a suitable host cathode material for the ZIBs.
Graphical abstract
TLS molecule consists of four LS units, which are aligned differently, thus, creating many empty void spaces in its matrix. Hence, it facilitates the Zn2+ ion movement within its lattice and thereby maximizes the utilization of TLS for energy storage.
{"title":"A highly conjugated tetrakis-lawsone organic cathode material for enhancing the capacity utilization in the zinc-ion batteries","authors":"Richa Gupta, Kothandaraman Ramanujam","doi":"10.1007/s12039-023-02244-4","DOIUrl":"10.1007/s12039-023-02244-4","url":null,"abstract":"<div><p>The search for better energy storage systems that are less expensive, resource-abundant, and safer has sparked intense research into zinc ion batteries (ZIBs). Organic materials, especially quinones-based ZIBs, improved the rate performances by providing structural flexibility for the movement of zinc ions. In this work, a highly conjugated quinone molecule, tetrakis-lawsone (TLS), with multiple active sites, was used to enhance the capacity of the ZIBs. The non-planar geometry of TLS due to the different orientations of all four lawsone units of TLS provided a sufficient void for the Zn<sup>2+</sup> movement, making it a suitable host cathode material for the ZIBs.</p><h3>Graphical abstract</h3><p>TLS molecule consists of four LS units, which are aligned differently, thus, creating many empty void spaces in its matrix. Hence, it facilitates the Zn<sup>2+</sup> ion movement within its lattice and thereby maximizes the utilization of TLS for energy storage.\u0000</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":616,"journal":{"name":"Journal of Chemical Sciences","volume":"136 2","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140117139","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-07DOI: 10.1007/s12039-024-02253-x
Selvakumar Arumugam, Sai Manoj N V T Gorantla, Christel Livia Mascarenhas, Birger Dittrich, Kartik Chandra Mondal
Silicon is one of the most important components of electronic devices. Surface passivation of a silicon wafer is an active area of research. The Si(OH)2 sites of partially oxidized silicon surface could exist as hydroxylated [Si(OH)2] or hydrated silanone [SiO∙(OH2)]. The previously reported disiladicarbene (cAAC)2Si2 has been reacted here with water to obtain elusive, hydrated silanone (3) co-crystallized with its silanol analog (2) in a 1:3 molar ratio. The mass spectrometric characterization of acyclic silanone, followed by the isolation and characterization of the zwitterionic hydrated silanone, has been achieved. The detailed energy decomposition analysis coupled with natural orbital for chemical valence (EDA-NOCV) calculations revealed that the central Si(O)OH unit of the hydrated silanone possesses a covalent electron sharing σ- and a dative σ-bonds (CL−Si, Si←CL) with hydrogen-containing cyclic alkyl(amino) carbene ligands. These two bonds are stabilized by 49% coulombic interaction and 47.8% orbital interaction. The presence of N-atoms at the hydrogenated and/or protonated carbene part (cAACH/cAACH2) has reduced the stability of these species. The electron pair on the N-atom of the cAACH unit displays a sort of anomeric effect relevant to the cyclic form of the sugar molecule.
Graphical abstract
A disiladicarbene containing two Si(0) centres reacts with water to produce a mixture of co-crystallized products in a 3:1 molar ratio. EDA-NOCV analyses further analysed the bonding and stability of zwitterionic-hydrate-silanone to probe the nature of chemical bonds in it. This species has further been characterized by ES-MS spectrometry.
{"title":"Activation of water at disiladicarbene: from the perspective of modification of silicon surface with organo-silicon compounds","authors":"Selvakumar Arumugam, Sai Manoj N V T Gorantla, Christel Livia Mascarenhas, Birger Dittrich, Kartik Chandra Mondal","doi":"10.1007/s12039-024-02253-x","DOIUrl":"10.1007/s12039-024-02253-x","url":null,"abstract":"<div><p>Silicon is one of the most important components of electronic devices. Surface passivation of a silicon wafer is an active area of research. The Si(OH)<sub>2</sub> sites of partially oxidized silicon surface could exist as hydroxylated [Si(OH)<sub>2</sub>] or hydrated silanone [SiO∙(OH<sub>2</sub>)]. The previously reported disiladicarbene (cAAC)<sub>2</sub>Si<sub>2</sub> has been reacted here with water to obtain elusive, hydrated silanone (<b>3</b>) co-crystallized with its silanol analog (<b>2</b>) in a 1:3 molar ratio. The mass spectrometric characterization of acyclic silanone, followed by the isolation and characterization of the zwitterionic hydrated silanone, has been achieved. The detailed energy decomposition analysis coupled with natural orbital for chemical valence (EDA-NOCV) calculations revealed that the central Si(O)OH unit of the hydrated silanone possesses a covalent electron sharing σ- and a dative σ-bonds (C<sub>L</sub>−Si, Si←C<sub>L</sub>) with hydrogen-containing cyclic alkyl(amino) carbene ligands. These two bonds are stabilized by 49% coulombic interaction and 47.8% orbital interaction. The presence of N-atoms at the hydrogenated and/or protonated carbene part (cAACH/cAACH<sub>2</sub>) has reduced the stability of these species. The electron pair on the N-atom of the cAACH unit displays a sort of anomeric effect relevant to the cyclic form of the sugar molecule.</p><h3>Graphical abstract</h3><p> A disiladicarbene containing two Si(0) centres reacts with water to produce a mixture of co-crystallized products in a 3:1 molar ratio. EDA-NOCV analyses further analysed the bonding and stability of zwitterionic-hydrate-silanone to probe the nature of chemical bonds in it. This species has further been characterized by ES-MS spectrometry.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":616,"journal":{"name":"Journal of Chemical Sciences","volume":"136 2","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140053812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-02DOI: 10.1007/s12039-024-02257-7
Bandarupalli Krishna, Sounak Roy
Recent research underscores the significance of metal-organic frameworks as catalysts, owing to their structural adaptability, substantial surface areas, adjustable pore dimensions, and customizable catalytic sites. Using Friedländer synthesis, we evaluated the catalytic potential of three synthesized metal-organic framework materials, MIL-53(Al), MIL-101(Cr), and MOF-5(Zn), in quinoline derivative synthesis. MIL-53(Al) outperformed MIL-101(Cr) and MOF-5(Zn), highlighting the vital role of Lewis acidic sites (Al3+) in quinoline production. Potentiometric titration analyses revealed MIL-53(Al)'s superior Lewis acid strength. Reaction optimization involved varying temperatures, catalyst loading, reaction duration, and solvents. MIL-53(Al) exhibited four-cycle recyclability. Mechanistic insights underscored Lewis acid strength and the significance of sites. The Al-based catalyst proficiently facilitated Friedlander synthesis, yielding enhanced conversion and considerable physiologically active quinoline yields. The findings offer insights into diverse catalytic strategies and demonstrate the adaptability of metal-organic framework materials in varied chemical reactions.
Graphical Abstract
The Al-based Lewis acid MOF catalyst MIL-53(Al) efficiently facilitated the Friedlander synthesis, resulting in improved conversion and significant yields of physiologically active quinolines. These findings provide insights into versatile catalytic strategies and showcase the adaptability of MOFs in diverse chemical reactions.
{"title":"Synthesis of Quinolines from 2-amino aryl ketones: Probing the Lewis Acid Sites of Metal-Organic Framework Catalyst","authors":"Bandarupalli Krishna, Sounak Roy","doi":"10.1007/s12039-024-02257-7","DOIUrl":"10.1007/s12039-024-02257-7","url":null,"abstract":"<div><p>Recent research underscores the significance of metal-organic frameworks as catalysts, owing to their structural adaptability, substantial surface areas, adjustable pore dimensions, and customizable catalytic sites. Using Friedländer synthesis, we evaluated the catalytic potential of three synthesized metal-organic framework materials, MIL-53(Al), MIL-101(Cr), and MOF-5(Zn), in quinoline derivative synthesis. MIL-53(Al) outperformed MIL-101(Cr) and MOF-5(Zn), highlighting the vital role of Lewis acidic sites (Al<sup>3+</sup>) in quinoline production. Potentiometric titration analyses revealed MIL-53(Al)'s superior Lewis acid strength. Reaction optimization involved varying temperatures, catalyst loading, reaction duration, and solvents. MIL-53(Al) exhibited four-cycle recyclability. Mechanistic insights underscored Lewis acid strength and the significance of sites. The Al-based catalyst proficiently facilitated Friedlander synthesis, yielding enhanced conversion and considerable physiologically active quinoline yields. The findings offer insights into diverse catalytic strategies and demonstrate the adaptability of metal-organic framework materials in varied chemical reactions.</p><h3>Graphical Abstract</h3><p>The Al-based Lewis acid MOF catalyst MIL-53(Al) efficiently facilitated the Friedlander synthesis, resulting in improved conversion and significant yields of physiologically active quinolines. These findings provide insights into versatile catalytic strategies and showcase the adaptability of MOFs in diverse chemical reactions.\u0000</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":616,"journal":{"name":"Journal of Chemical Sciences","volume":"136 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140017616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A series of K2Ca1-xP2O7:xEu3+ phosphors were prepared by a high-temperature solid-state reaction method. The crystal structure was analyzed by X-ray diffraction (XRD). Fluorescence spectra, decay curves, and color coordinates were investigated. Under excitation at 393 nm, the strongest emission peak was located at 590 nm, corresponding to the 5D0→7F1 transition of Eu3+, and the sub-strongest one was located at 612 nm which belongs to the 5D0→7F2 transition of Eu3+. XRD results show that the patterns doped with a small amount of Eu3+ were fitted well with the standard card of K2CaP2O7, while the pattern with the doping of high concentration Eu3+ (heavy-doping) indicated the co-existence of K2CaP2O7 and EuPO4 phase which leads to luminescent intensity of phosphors enhance remarkablely. The concentration quenching mechanism was explained through dipole-dipole interaction. Different doping amounts of Eu3+ and charge compensators will affect the symmetry of the host lattice, thereby affecting the emission intensity ratio of orange and red light. The color coordinates of K2Ca0.49P2O7:0.51Eu3+ and K2Ca0.33P2O7:0.67Eu3+, 0.1Na+ phosphor were near the red region, which was close to commercial red-emitting phosphors Y2O3:Eu3+ and standard red light, respectively.
Graphical abstract
A series of K2CaP2O7 phosphors emitting orange-red light with different concentrations of Eu3+ doping and alkali metal ions co-doping were synthesized via a high-temperature solid-state method, and their structure and luminescent properties were characterized. A new strategy for adjusting the light color parameters of K2CaP2O7 phosphors has been constructed.
{"title":"Effect of heavy-doping Eu3+ and charge compensation on crystalline phase and luminescence properties of K2CaP2O7 phosphors emitting orange-red light","authors":"Yu-Huan Wang, Yong-Jie Chen, Xiu-Juan Geng, Ying Yang, Zi-Qing Li, Xiu-Yuan Zuo","doi":"10.1007/s12039-024-02251-z","DOIUrl":"10.1007/s12039-024-02251-z","url":null,"abstract":"<div><p>A series of K<sub>2</sub>Ca<sub>1-<i>x</i></sub>P<sub>2</sub>O<sub>7</sub>:<i>x</i>Eu<sup>3+</sup> phosphors were prepared by a high-temperature solid-state reaction method. The crystal structure was analyzed by X-ray diffraction (XRD). Fluorescence spectra, decay curves, and color coordinates were investigated. Under excitation at 393 nm, the strongest emission peak was located at 590 nm, corresponding to the <sup>5</sup>D<sub>0</sub>→<sup>7</sup>F<sub>1</sub> transition of Eu<sup>3+</sup>, and the sub-strongest one was located at 612 nm which belongs to the <sup>5</sup>D<sub>0</sub>→<sup>7</sup>F<sub>2</sub> transition of Eu<sup>3+</sup>. XRD results show that the patterns doped with a small amount of Eu<sup>3+</sup> were fitted well with the standard card of K<sub>2</sub>CaP<sub>2</sub>O<sub>7</sub>, while the pattern with the doping of high concentration Eu<sup>3+</sup> (heavy-doping) indicated the co-existence of K<sub>2</sub>CaP<sub>2</sub>O<sub>7</sub> and EuPO<sub>4</sub> phase which leads to luminescent intensity of phosphors enhance remarkablely. The concentration quenching mechanism was explained through dipole-dipole interaction. Different doping amounts of Eu<sup>3+</sup> and charge compensators will affect the symmetry of the host lattice, thereby affecting the emission intensity ratio of orange and red light. The color coordinates of K<sub>2</sub>Ca<sub>0.49</sub>P<sub>2</sub>O<sub>7</sub>:0.51Eu<sup>3+</sup> and K<sub>2</sub>Ca<sub>0.33</sub>P<sub>2</sub>O<sub>7</sub>:0.67Eu<sup>3+</sup>, 0.1Na<sup>+</sup> phosphor were near the red region, which was close to commercial red-emitting phosphors Y<sub>2</sub>O<sub>3</sub>:Eu<sup>3+</sup> and standard red light, respectively.</p><h3>Graphical abstract</h3><p>A series of K<sub>2</sub>CaP<sub>2</sub>O<sub>7</sub> phosphors emitting orange-red light with different concentrations of Eu<sup>3+</sup> doping and alkali metal ions co-doping were synthesized <i>via</i> a high-temperature solid-state method, and their structure and luminescent properties were characterized. A new strategy for adjusting the light color parameters of K<sub>2</sub>CaP<sub>2</sub>O<sub>7</sub> phosphors has been constructed.\u0000</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":616,"journal":{"name":"Journal of Chemical Sciences","volume":"136 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140004183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-28DOI: 10.1007/s12039-023-02247-1
Pragati Sharma, Pragya Sinha, Nidhi Gupta
A facile green accessibility for the synthesis of novel, distinctly substituted 2H-pyran analogues employing montmorillonite K10 clay as a sustainable catalyst via a one-pot multi-component reaction involving various aldehydes, thiophenol and cyanoacetic acid with acetophenone has been developed. The noteworthy features of the current methodology are short reaction time (1.5-2 h), good yields (70-82%), convenient technique, operational simplicity, ease of work-up, and reusability of the catalyst up to two runs, adhering to green chemistry principles. A spectroscopic assessment validated the structure of all the synthesized products. This multi-component one-pot transformation conveniently forms two new C-C bonds, one C-O bond, one C-S bond, and two new rings with all reactants consumed efficiently. Additionally, all synthesized compounds have been evaluated for anti-cancer activity, and two of them were found to be efficacious against human breast cancer cell line, namely, MDA-MB 231.
Graphical Abstract
A green and efficient method has been developed for synthesizing novel 2H-pyran analogues using montmorillonite K10 clay as a catalyst. The method involves a one-pot multi-component reaction and yields high products (70–82%) while adhering to green chemistry principles. The synthesized compounds have shown efficacy against human breast cancer cell line MDA-MB 231.
{"title":"Montmorillonite K10 clay promoted one-pot pseudo-five-component synthesis of 5-cyano-6-(phenylthio)-2-((1-phenylvinyl)imino)-4- aryl(or heteroaryl)-2H-pyran-3-carboxylic acid derivatives and their potential cytotoxic activity","authors":"Pragati Sharma, Pragya Sinha, Nidhi Gupta","doi":"10.1007/s12039-023-02247-1","DOIUrl":"10.1007/s12039-023-02247-1","url":null,"abstract":"<div><p>A facile green accessibility for the synthesis of novel, distinctly substituted 2H-pyran analogues employing montmorillonite K10 clay as a sustainable catalyst via a one-pot multi-component reaction involving various aldehydes, thiophenol and cyanoacetic acid with acetophenone has been developed. The noteworthy features of the current methodology are short reaction time (1.5-2 h), good yields (70-82%), convenient technique, operational simplicity, ease of work-up, and reusability of the catalyst up to two runs, adhering to green chemistry principles. A spectroscopic assessment validated the structure of all the synthesized products. This multi-component one-pot transformation conveniently forms two new C-C bonds, one C-O bond, one C-S bond, and two new rings with all reactants consumed efficiently. Additionally, all synthesized compounds have been evaluated for anti-cancer activity, and two of them were found to be efficacious against human breast cancer cell line, namely, MDA-MB 231.</p><h3>Graphical Abstract</h3><p>A green and efficient method has been developed for synthesizing novel 2H-pyran analogues using montmorillonite K10 clay as a catalyst. The method involves a one-pot multi-component reaction and yields high products (70–82%) while adhering to green chemistry principles. The synthesized compounds have shown efficacy against human breast cancer cell line MDA-MB 231.\u0000</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":616,"journal":{"name":"Journal of Chemical Sciences","volume":"136 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140004578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-22DOI: 10.1007/s12039-023-02245-3
Molood Falsafin, Kamal Ghani, Arash Shokrollahi
5-Hydroxymethylfurfural (HMF), a leading platform combination for altering biomass to diverse biomass-derived chemicals and biofuels, has been engrossed in spacious consideration. In this perusal, a new catalyst modified with sulfonic acid and -Cl functional group UiO-66-SO3H-Cl was first used as an efficiently heterogeneous catalyst with the overlapping effect of three functional groups of Lewis acid, Brønsted acid and -Cl group binding site was synthesized to convert glucose to HMF. The Lewis acid site is responsible for the isomerization of glucose to fructose, and the dehydration of fructose to HMF is the responsibility of the Brønsted acid site. The -Cl group facilitates the hydrolysis of glucose by forming a hydrogen bond with glucose and reducing the activation energy, thus increasing the production rate of HMF. The synthesized catalysts were analyzed using XRD, FT-IR, FE-SEM, EDS, and XPS. The amount of Zr, Cl, and S elements reported in the newly synthesized catalyst in this research by EDS is 37.44%, 1.01%, and 6.8%, respectively. The existence of C 1s (284.8 eV), O 1s (531.9 eV), Cl 2p (200.4 eV), Zr 3d (185.2 eV), and S 2p (168.4 eV) of UiO-66-SO3H-Cl was confirmed by conducting XPS analysis. The reaction range of 5-HMF produced from glucose by each of UiO-66, UiO-66-SO3H, and UiO-66-SO3H-Cl catalysts, was 10%, 23% and 74%, respectively, as determined by UV-Vis analysis was decided the results show that the UiO-66-SO3H-Cl catalyst with three functional groups synergistically increases the production of HMF from glucose.
Graphical Abstract
Conversion of glucose to HMF by UiO-66-SO3H-Cl multifunctional solid catalyst: Lewis acid (Zr cation) and Brønsted acid (SO3H group) are active sites for isomerizing glucose to fructose and dehydration of fructose to HMF, respectively. The -Cl group forms a hydrogen bond with glucose, increasing the production rate of HMF.
{"title":"Synthesis of UiO-66-SO3H-Cl as the recyclable multifunctional catalyst for efficient conversion of glucose to 5–Hydroxymethylfurfural","authors":"Molood Falsafin, Kamal Ghani, Arash Shokrollahi","doi":"10.1007/s12039-023-02245-3","DOIUrl":"10.1007/s12039-023-02245-3","url":null,"abstract":"<div><p>5-Hydroxymethylfurfural (HMF), a leading platform combination for altering biomass to diverse biomass-derived chemicals and biofuels, has been engrossed in spacious consideration. In this perusal, a new catalyst modified with sulfonic acid and -Cl functional group UiO-66-SO<sub>3</sub>H-Cl was first used as an efficiently heterogeneous catalyst with the overlapping effect of three functional groups of Lewis acid, Brønsted acid and -Cl group binding site was synthesized to convert glucose to HMF. The Lewis acid site is responsible for the isomerization of glucose to fructose, and the dehydration of fructose to HMF is the responsibility of the Brønsted acid site. The -Cl group facilitates the hydrolysis of glucose by forming a hydrogen bond with glucose and reducing the activation energy, thus increasing the production rate of HMF. The synthesized catalysts were analyzed using XRD, FT-IR, FE-SEM, EDS, and XPS. The amount of Zr, Cl, and S elements reported in the newly synthesized catalyst in this research by EDS is 37.44%, 1.01%, and 6.8%, respectively. The existence of C 1s (284.8 eV), O 1s (531.9 eV), Cl 2p (200.4 eV), Zr 3d (185.2 eV), and S 2p (168.4 eV) of UiO-66-SO3H-Cl was confirmed by conducting XPS analysis. The reaction range of 5-HMF produced from glucose by each of UiO-66, UiO-66-SO<sub>3</sub>H, and UiO-66-SO<sub>3</sub>H-Cl catalysts, was 10%, 23% and 74%, respectively, as determined by UV-Vis analysis was decided the results show that the UiO-66-SO<sub>3</sub>H-Cl catalyst with three functional groups synergistically increases the production of HMF from glucose.</p><h3>Graphical Abstract</h3><p>Conversion of glucose to HMF by UiO-66-SO<sub>3</sub>H-Cl multifunctional solid catalyst: Lewis acid (Zr cation) and Brønsted acid (SO<sub>3</sub>H group) are active sites for isomerizing glucose to fructose and dehydration of fructose to HMF, respectively. The -Cl group forms a hydrogen bond with glucose, increasing the production rate of HMF.\u0000</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":616,"journal":{"name":"Journal of Chemical Sciences","volume":"136 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139921804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-16DOI: 10.1007/s12039-023-02239-1
Ngo Nguyen Tra My, Tran Thi Bich Quyen, Tran Minh Khang, Bui Le Anh Tuan, Doan Van Hong Thien
In this study, the novel Au/Cu2O/Graphene quantum dots nanocomposites have been synthesized via a fast, simple and environmentally friendly method for the first time. Specifically, Cu2O nanocubes (Cu2O NCBs) synthesized by a reduction reaction at room temperature were combined with Au nanoparticles (Au NPs) and Graphene quantum dots (GQDs) obtained from low-cost and naturally abundant material. The synthesized Au/Cu2O/GQDs were characterized by UV-vis, FTIR, XRD, TEM, FESEM, and EDS. The results show that the Au/Cu2O/GQDs have an average size of about 32-36 nm, in which the diameter of Au NPs is ~28-32 nm, Cu2O particles have the form of nanocube with the size of ~29-33 nm and GQDs are small spherical with an average size of ~5 nm. In addition, the electrochemical properties of the Au/Cu2O/GQDs electrodes were investigated using the cyclic voltammetry (CV) technique. The obtained results show that the Au/Cu2O/GQDs have high electroactivity, which are very potential and promising to be used in glucose sensor with a very wide concentration of glucose detection range from 10-10 M to 1 M with a the LOD of 70 nM (7×10-8 M) and a high sensitivity of 32.5 μAμM-1cm-2. Therefore, Au/Cu2O/GQDs will be potential candidate for non-enzymatic sensitive glucose sensors in the future.
Graphical abstract
Cu2O nanocubes (Cu2O NCBs) were successfully combined with Au nanoparticles (Au NPs) and Graphene quantum dots (GQDs) to generate Au/Cu2O/GQDs nanocomposites. The properties and morphology of synthesized Au/Cu2O/GQDs were also studied. Au/Cu2O/GQDs showed promising electrochemical activity and performed its applicability for glucose detection with a wide concentration of glucose detection range from 10-10 M to 1 M.
{"title":"Synthesis of Au/Cu2O/graphene quantum dots nanocomposites and its application for glucose oxidation","authors":"Ngo Nguyen Tra My, Tran Thi Bich Quyen, Tran Minh Khang, Bui Le Anh Tuan, Doan Van Hong Thien","doi":"10.1007/s12039-023-02239-1","DOIUrl":"10.1007/s12039-023-02239-1","url":null,"abstract":"<div><p>In this study, the novel Au/Cu<sub>2</sub>O/Graphene quantum dots nanocomposites have been synthesized <i>via</i> a fast, simple and environmentally friendly method for the first time. Specifically, Cu<sub>2</sub>O nanocubes (Cu<sub>2</sub>O NCBs) synthesized by a reduction reaction at room temperature were combined with Au nanoparticles (Au NPs) and Graphene quantum dots (GQDs) obtained from low-cost and naturally abundant material. The synthesized Au/Cu<sub>2</sub>O/GQDs were characterized by UV-vis, FTIR, XRD, TEM, FESEM, and EDS. The results show that the Au/Cu<sub>2</sub>O/GQDs have an average size of about 32-36 nm, in which the diameter of Au NPs is ~28-32 nm, Cu<sub>2</sub>O particles have the form of nanocube with the size of ~29-33 nm and GQDs are small spherical with an average size of ~5 nm. In addition, the electrochemical properties of the Au/Cu<sub>2</sub>O/GQDs electrodes were investigated using the cyclic voltammetry (CV) technique. The obtained results show that the Au/Cu<sub>2</sub>O/GQDs have high electroactivity, which are very potential and promising to be used in glucose sensor with a very wide concentration of glucose detection range from 10<sup>-10</sup> M to 1 M with a the LOD of 70 nM (7×10<sup>-8</sup> M) and a high sensitivity of 32.5 μAμM<sup>-1</sup>cm<sup>-2</sup>. Therefore, Au/Cu<sub>2</sub>O/GQDs will be potential candidate for non-enzymatic sensitive glucose sensors in the future.</p><h3>Graphical abstract</h3><p>Cu<sub>2</sub>O nanocubes (Cu<sub>2</sub>O NCBs) were successfully combined with Au nanoparticles (Au NPs) and Graphene quantum dots (GQDs) to generate Au/Cu<sub>2</sub>O/GQDs nanocomposites. The properties and morphology of synthesized Au/Cu<sub>2</sub>O/GQDs were also studied. Au/Cu<sub>2</sub>O/GQDs showed promising electrochemical activity and performed its applicability for glucose detection with a wide concentration of glucose detection range from 10<sup>-10</sup> M to 1 M.\u0000</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":616,"journal":{"name":"Journal of Chemical Sciences","volume":"136 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139771945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-15DOI: 10.1007/s12039-023-02246-2
Mingyu Zhang, Dong Yan, Rui Xu, Yuqi Tang, Shuangping Xu, Yanqing Qu, Jingyu Xu, Boyu Du, Hongge Jia
A new rhodium complex [Rh(cod)(TTT)2] was synthesized by [Rh(cod)Cl]2 as a precursor, and 4,4',4''-(1,3,5-triazine-2,4,6-triyl)trianiline (TTT) as a ligand. Its structure was verified by 1H and 13C NMR. The results indicate that the complex shows high activity in phenylacetylene polymerization. It was applied to the polymerization of phenylacetylene with a yield of 45.0% and Mw = 2.26×105 at ultra-low rhodium feed ratio ([Rh.]/[M.]=1/60000).
Graphical abstract
A new rhodium complex [Rh(cod)(TTT)2] was synthesized by [Rh(cod)Cl]2 as a precursor, and 4,4',4''-(1,3,5-triazine-2,4,6-triyl)trianiline (TTT) as a ligand. It was applied to the polymerization of phenylacetylene with a yield of 45.0% and Mw = 2.26×105 at ultra-low rhodium feed ratio ([Rh.]/[M.]=1/60000
{"title":"Synthesis of rhodium catalyst [Rh(cod)(TTT)2] with amino group ligand and its catalytic performance for phenylacetylene polymerization","authors":"Mingyu Zhang, Dong Yan, Rui Xu, Yuqi Tang, Shuangping Xu, Yanqing Qu, Jingyu Xu, Boyu Du, Hongge Jia","doi":"10.1007/s12039-023-02246-2","DOIUrl":"10.1007/s12039-023-02246-2","url":null,"abstract":"<div><p>A new rhodium complex [Rh(cod)(TTT)<sub>2</sub>] was synthesized by [Rh(cod)Cl]<sub>2</sub> as a precursor, and 4,4',4''-(1,3,5-triazine-2,4,6-triyl)trianiline (TTT) as a ligand. Its structure was verified by <sup>1</sup>H and <sup>13</sup>C NMR. The results indicate that the complex shows high activity in phenylacetylene polymerization. It was applied to the polymerization of phenylacetylene with a yield of 45.0% and Mw = 2.26×10<sup>5</sup> at ultra-low rhodium feed ratio ([Rh.]/[M.]=1/60000).</p><h3>Graphical abstract</h3><p>A new rhodium complex [Rh(cod)(TTT)<sub>2</sub>] was synthesized by [Rh(cod)Cl]<sub>2</sub> as a precursor, and 4,4',4''-(1,3,5-triazine-2,4,6-triyl)trianiline (TTT) as a ligand. It was applied to the polymerization of phenylacetylene with a yield of 45.0% and Mw = 2.26×10<sup>5</sup> at ultra-low rhodium feed ratio ([Rh.]/[M.]=1/60000\u0000</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":616,"journal":{"name":"Journal of Chemical Sciences","volume":"136 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139771756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-12DOI: 10.1007/s12039-023-02248-0
M Sheeba Gnana Selvi, G V Vijayaraghavan, B Janarthanan, K Inbarajan
A dye-sensitized solar cell (DSSC) has been fabricated with a photoanode made with silver-decorated reduced graphene oxide over the layer of TiO2 nanoparticle coated over the FTO substrate using the Doctor Blade method. Due to the excellent electrical conductivity of silver decorated reduced graphene oxide and high adsorption of dye molecules, the cell parameters are enhanced. Three different concentrations of Ag decorated rGO (0.1% wt, 0.2% wt, and 0.3% wt) have been considered for this study and are compared with pure TiO2-based DSSC. It is confirmed that the 0.1% wt concentration of TiO2-Ag decorated rGO has shown better performance than the other concentrations as well as the pure TiO2 photoanode. Natural dyes having chlorophyll pigment have been used as sensitizers, and graphene-based counter electrodes are incorporated in all solar cells. DSSC of 0.1% wt concentration of TiO2-Ag decorated rGO has given short circuit current density, open circuit voltage, fill factor, and power conversion efficiency of 3.768 mA/cm2, 0.6518 V, 0.566, and 1.39%, respectively. The higher the concentration of Ag decorated rGO with TiO2, the lower the electron injection into the semiconductor oxide with increased band gap energy.
In this experiment, we found that 0.1% wt concentration of TiO2-Ag decorated rGO has given a short power conversion efficiency of 1.39%, respectively.
{"title":"Incorporation of Ag decorated rGO ON TiO2/dye photoanode for dye-sensitized solar cell applications","authors":"M Sheeba Gnana Selvi, G V Vijayaraghavan, B Janarthanan, K Inbarajan","doi":"10.1007/s12039-023-02248-0","DOIUrl":"10.1007/s12039-023-02248-0","url":null,"abstract":"<p>A dye-sensitized solar cell (DSSC) has been fabricated with a photoanode made with silver-decorated reduced graphene oxide over the layer of TiO<sub>2</sub> nanoparticle coated over the FTO substrate using the Doctor Blade method. Due to the excellent electrical conductivity of silver decorated reduced graphene oxide and high adsorption of dye molecules, the cell parameters are enhanced. Three different concentrations of Ag decorated rGO (0.1% wt, 0.2% wt, and 0.3% wt) have been considered for this study and are compared with pure TiO<sub>2</sub>-based DSSC. It is confirmed that the 0.1% wt concentration of TiO<sub>2</sub>-Ag decorated rGO has shown better performance than the other concentrations as well as the pure TiO<sub>2</sub> photoanode. Natural dyes having chlorophyll pigment have been used as sensitizers, and graphene-based counter electrodes are incorporated in all solar cells. DSSC of 0.1% wt concentration of TiO<sub>2</sub>-Ag decorated rGO has given short circuit current density, open circuit voltage, fill factor, and power conversion efficiency of 3.768 mA/cm<sup>2</sup>, 0.6518 V, 0.566, and 1.39%, respectively. The higher the concentration of Ag decorated rGO with TiO<sub>2</sub>, the lower the electron injection into the semiconductor oxide with increased band gap energy.</p><p>In this experiment, we found that 0.1% wt concentration of TiO<sub>2</sub>-Ag decorated rGO has given a short power conversion efficiency of 1.39%, respectively.</p>","PeriodicalId":616,"journal":{"name":"Journal of Chemical Sciences","volume":"136 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139771800","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-12DOI: 10.1007/s12039-023-02240-8
Sandeep R Kurundawade, Sharanappa T Nandibewoor
The study investigates the kinetics associated with the oxidation of D-Mannitol (D-Mann) by diperiodatocuprate(III) (DPC) in an aqueous alkaline medium using spectrophotometric method. Reaction medium’s ionic strength was maintained constant at 0.60 mol dm-3. First-order kinetics in [DPC] and less than unit order for [D-Mann] and [alkali] were observed in the reaction. It was of the negative fractional order in [periodate]. It was determined that the reaction of substrate D-Mann with DPC in an alkaline medium shows 1(D-Mann):4(DPC) stoichiometry. Ionic strength of the medium had no effect on the rate of reaction and same was the observation with dielectric constant. The products of reaction were identified by FTIR and confirmed by LC-ESI-MS spectral data. The reaction constants for each step of the mechanism were determined. For the slow step of reaction mechanism, activation parameters were calculated and discussed. Further, thermodynamic quantities for the reactions were also estimated.
Graphical abstract
Based on the literature survey, DPC was chosen for the current study. DPC was prepared by the reported methods as cited in the manuscript. Stable reaction mixtures were prepared in two different reagent bottles and maintained at a desired temperature using a water bath. The reaction between the oxidant DPC and substrate D-Mannitol was spectrophotometrically analyzed by a UV-Vis spectrophotometer. With the help of data obtained, graphs were plotted to obtain kobs for different variations, and the mechanism was synthesized. A rate law for the reaction under investigation was proposed based on the results and mechanism.
{"title":"A kinetic and mechanistic investigation of oxidation of D-Mannitol by Diperiodatocuprate (III) in an aqueous alkaline medium","authors":"Sandeep R Kurundawade, Sharanappa T Nandibewoor","doi":"10.1007/s12039-023-02240-8","DOIUrl":"10.1007/s12039-023-02240-8","url":null,"abstract":"<div><p>The study investigates the kinetics associated with the oxidation of D-Mannitol (D-Mann) by diperiodatocuprate(III) (DPC) in an aqueous alkaline medium using spectrophotometric method. Reaction medium’s ionic strength was maintained constant at 0.60 mol dm<sup>-3</sup>. First-order kinetics in [DPC] and less than unit order for [D-Mann] and [alkali] were observed in the reaction. It was of the negative fractional order in [periodate]. It was determined that the reaction of substrate D-Mann with DPC in an alkaline medium shows 1(D-Mann):4(DPC) stoichiometry. Ionic strength of the medium had no effect on the rate of reaction and same was the observation with dielectric constant. The products of reaction were identified by FTIR and confirmed by LC-ESI-MS spectral data. The reaction constants for each step of the mechanism were determined. For the slow step of reaction mechanism, activation parameters were calculated and discussed. Further, thermodynamic quantities for the reactions were also estimated.</p><h3>Graphical abstract</h3><p>Based on the literature survey, DPC was chosen for the current study. DPC was prepared by the reported methods as cited in the manuscript. Stable reaction mixtures were prepared in two different reagent bottles and maintained at a desired temperature using a water bath. The reaction between the oxidant DPC and substrate D-Mannitol was spectrophotometrically analyzed by a UV-Vis spectrophotometer. With the help of data obtained, graphs were plotted to obtain k<sub>obs</sub> for different variations, and the mechanism was synthesized. A rate law for the reaction under investigation was proposed based on the results and mechanism.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":616,"journal":{"name":"Journal of Chemical Sciences","volume":"136 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139773299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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