The role of macrocyclic and Schiff base complexes in chemistry and life sciences offers vast opportunities to the researchers. Herein, this review focuses on the recent developments in ruthenium-based macrocyclic complexes and their utilities. Nowadays, ruthenium-based macrocyclic complexes are substantially exploited in copious applications, such as antioxidant, anticancer, antimicrobial, catalysis, sensors, pigments, dyes, etc. are a few of them. This study combines innovations in modelling and employment of these macrocyclic ligands and their complexes with ruthenium that serves as an interaction between the fields of chemistry, physics and biology. Probably Ru(II) and Ru(III) complexes achieve a wider holder of a three-dimensional scaffold through octahedral bonding, which opens up the possibility for a greater level of site diversity for attaching to their biological substrates. This study also expresses a broader overview of the topic and aims to highlight developments in ligand designing, synthetic methods, and potent applications especially as prominent therapeutic agents of these metal complexes in diverse areas. Additionally, some of the Schiff bases complexes with the same metal are also highlighted with their prominent applications.
{"title":"Ruthenium-based macrocyclic and Schiff base complexes as prominent therapeutic agents: Their designing, synthesis and recent perspectives","authors":"Urmila Phageria , Sushama Kumari , Krishna Atal , Swati Bugalia","doi":"10.1016/j.poly.2024.117309","DOIUrl":"10.1016/j.poly.2024.117309","url":null,"abstract":"<div><div>The role of macrocyclic and Schiff base complexes in chemistry and life sciences offers vast opportunities to the researchers. Herein, this review focuses on the recent developments in ruthenium-based macrocyclic complexes and their utilities. Nowadays, ruthenium-based macrocyclic complexes are substantially exploited in copious applications, such as antioxidant, anticancer, antimicrobial, catalysis, sensors, pigments, dyes, etc. are a few of them. This study combines innovations in modelling and employment of these macrocyclic ligands and their complexes with ruthenium that serves as an interaction between the fields of chemistry, physics and biology. Probably Ru(II) and Ru(III) complexes achieve a wider holder of a three-dimensional scaffold through octahedral bonding, which opens up the possibility for a greater level of site diversity for attaching to their biological substrates. This study also expresses a broader overview of the topic and aims to highlight developments in ligand designing, synthetic methods, and potent applications especially as prominent therapeutic agents of these metal complexes in diverse areas. Additionally, some of the Schiff bases complexes with the same metal are also highlighted with their prominent applications.</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"266 ","pages":"Article 117309"},"PeriodicalIF":2.4,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142702204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-17DOI: 10.1016/j.poly.2024.117308
Eszter Fazekas , Alvaro Etcheverry-Berrios , Gary S. Nichol , Stergios Piligkos , Euan K. Brechin , Jennifer A. Garden
Mono and bimetallic cage-like TrenSal complexes based on rare-earth metals Y and Lu were synthesised and fully characterised by single crystal and powder X-ray diffraction, multinuclear NMR and IR spectroscopy, and MALDI-ToF mass spectrometry. These robust and air-stable complexes are active catalysts for the ring-opening polymerisation of rac-lactide. While the polymerisation activity is low, the complexes remain active in air using unpurified monomers, and are highly unusual examples of metal–organic cages applied in polymerisation. MALDI-ToF mass spectrometry studies of the obtained polymers revealed H and OBn end-capped chains suggesting that an ‘activated monomer’ mechanism predominates when BnOH is used as an exogenous initiator.
通过单晶和粉末 X 射线衍射、多核核磁共振和红外光谱以及 MALDI-ToF 质谱法，合成了基于稀土金属 Y 和 Lu 的单金属笼状 TrenSal 复合物和双金属笼状 TrenSal 复合物，并对其进行了全面表征。这些坚固且在空气中稳定的复合物是 rac-lactide 开环聚合反应的活性催化剂。虽然聚合活性较低，但使用未净化的单体时，这些复合物在空气中仍能保持活性，是将金属有机笼应用于聚合反应的极不寻常的例子。对获得的聚合物进行的 MALDI-ToF 质谱研究显示，H 和 OBn 端封端链表明，当 BnOH 用作外源引发剂时，"活化单体 "机制占主导地位。
{"title":"Robust Y and Lu TrenSal catalysts for ring-opening polymerisation","authors":"Eszter Fazekas , Alvaro Etcheverry-Berrios , Gary S. Nichol , Stergios Piligkos , Euan K. Brechin , Jennifer A. Garden","doi":"10.1016/j.poly.2024.117308","DOIUrl":"10.1016/j.poly.2024.117308","url":null,"abstract":"<div><div>Mono and bimetallic cage-like TrenSal complexes based on rare-earth metals Y and Lu were synthesised and fully characterised by single crystal and powder X-ray diffraction, multinuclear NMR and IR spectroscopy, and MALDI-ToF mass spectrometry. These robust and air-stable complexes are active catalysts for the ring-opening polymerisation of <em>rac</em>-lactide. While the polymerisation activity is low, the complexes remain active in air using unpurified monomers, and are highly unusual examples of metal–organic cages applied in polymerisation. MALDI-ToF mass spectrometry studies of the obtained polymers revealed H and OBn end-capped chains suggesting that an ‘activated monomer’ mechanism predominates when BnOH is used as an exogenous initiator.</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"266 ","pages":"Article 117308"},"PeriodicalIF":2.4,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142702195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-17DOI: 10.1016/j.poly.2024.117304
Zhen-Ping Liao , Shu-Sheng Xin , Wei Li , Chun-Yang Pan
A series of borates 1–6, have been synthesized under mild conditions, single crystal X-ray diffraction indicates that they possess three types of metal complex configurations in borate crystalline, exemplified as TM-L for 3 and 4, μ2-O-TM for 2, μ3-O-TM for 1, 5 and 6. 5 and 6 exhibit both four-coordinated and six-coordinated metal ions in one single crystal lattice. 1 to 6 are further characterized by powder X-ray diffraction, elemental analysis, IR spectrum and UV–vis spectroscopy. In addition, the ORR activities of them are performed. Among them, cobalt borate-based catalyst exhibits the best catalytic performance, with a half-wave potential of 0.82 V. Furthermore, the relationship between the ORR properties of TM complex borates and their framework densities was explored.
{"title":"Synthesis of series of transition metal-ligand (TM-L), μ2-O-TM, μ3-O-TM-L borates: Characterization and oxygen reduction reaction (ORR) activity property exploration","authors":"Zhen-Ping Liao , Shu-Sheng Xin , Wei Li , Chun-Yang Pan","doi":"10.1016/j.poly.2024.117304","DOIUrl":"10.1016/j.poly.2024.117304","url":null,"abstract":"<div><div>A series of borates <strong>1</strong>–<strong>6</strong>, have been synthesized under mild conditions, single crystal X-ray diffraction indicates that they possess three types of metal complex configurations in borate crystalline, exemplified as TM-L for <strong>3</strong> and <strong>4</strong>, <em>μ</em><sub>2</sub>-O-TM for <strong>2</strong>, <em>μ</em><sub>3</sub>-O-TM for <strong>1</strong>, <strong>5</strong> and <strong>6</strong>. <strong>5</strong> and <strong>6</strong> exhibit both four-coordinated and six-coordinated metal ions in one single crystal lattice. <strong>1</strong> to <strong>6</strong> are further characterized by powder X-ray diffraction, elemental analysis, IR spectrum and UV–vis spectroscopy. In addition, the ORR activities of them are performed. Among them, cobalt borate-based catalyst exhibits the best catalytic performance, with a half-wave potential of 0.82 V. Furthermore, the relationship between the ORR properties of TM complex borates and their framework densities was explored.</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"266 ","pages":"Article 117304"},"PeriodicalIF":2.4,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142702197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-16DOI: 10.1016/j.poly.2024.117311
Roman Jaffar , Najla AlMasoud , Khurram Shahzad Munawar , Sana Rauf , Taghrid S. Alomar , Hafiz Muhammad Asif , Zeinhom M. El-Bahy , Hameed Ullah , Saifullah
Sulfur compounds need to be effectively rejected from fuel to maintain a clean environment. The removal of sulfur compounds from thiocompounds has received increased attention due to the negative environmental and industrial consequences of sulfur emissions. We examine the effectiveness of polyoxometalate (POM) ionic liquid-based nanocomposites as catalysts for the oxidative desulfurization of thiobenzoic acid and other sulfur-containing chemicals. Na-POMIL@NCP and Cr-POMIL@NCP were synthesized and thoroughly characterized using a variety of analytical techniques, including Fourier-transform infrared spectroscopy (FT-IR), UV–visible spectroscopy, powder X-ray diffraction (P-XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), fluorescence spectroscopy, and vibrating sample magnetometer (VSM). POMIL-based nanocomposites with Fe3O4@SiO2 exhibit both catalytic activity and adsorption capability. To evaluate sulfur removal efficiency and investigate the transformation paths of the thio compounds, high-performance liquid chromatography (HPLC) was performed at 33 °C using a C18 column with an acetonitrile–water mobile phase (1:1 ratio). The catalytic conversion of thiobenzoic acid and dibenzothiophene occurs at temperature, oxidant O/S ratio and catalyst concentration were investigated to determine the best catalyst for a given process. Under moderate conditions, this work proposes a cost-effective and ecologically acceptable approach for thiobenzoic acid (TB) and dibenzothiophene (DBT) production employing H2O2 as an oxidant and Na-POMIL@NCP and Cr-POMIL@NCP as heterogeneous catalysts. They are highly effective for oxidizing sulfur compounds included in diesel to lower the sulfur levels of fuel. This study provides to the development of innovative materials for ecologically friendly sulfur removal applications.
为了保持环境清洁，需要有效地去除燃料中的硫化合物。由于硫排放对环境和工业造成的负面影响，从硫代化合物中去除硫化合物的研究受到越来越多的关注。我们研究了聚氧化金属（POM）离子液体基纳米复合材料作为催化剂对硫代苯甲酸和其他含硫化学品进行氧化脱硫的有效性。研究人员合成了 Na-POMIL@NCP 和 Cr-POMIL@NCP，并使用多种分析技术对其进行了全面表征，包括傅立叶变换红外光谱（FT-IR）、紫外-可见光谱、粉末 X 射线衍射（P-XRD）、扫描电子显微镜（SEM）、粉末 X 射线衍射（P-XRD）和傅立叶变换红外光谱（FT-IR）、扫描电子显微镜 (SEM)、能量色散 X 射线光谱仪 (EDX)、热重分析 (TGA)、差示扫描量热仪 (DSC)、荧光光谱仪和振动样品磁力计 (VSM)。基于 POMIL 的 Fe3O4@SiO2 纳米复合材料同时具有催化活性和吸附能力。为了评估硫的去除效率并研究硫代化合物的转化路径，在 33 °C下使用C18色谱柱和乙腈-水流动相（1:1）进行了高效液相色谱分析。研究了硫代苯甲酸和二苯并噻吩的催化转化温度、氧化剂 O/S 比率和催化剂浓度，以确定特定工艺的最佳催化剂。在中等条件下，本研究提出了一种具有成本效益且生态上可接受的硫代苯甲酸（TB）和二苯并噻吩（DBT）生产方法，该方法采用 H2O2 作为氧化剂，Na-POMIL@NCP 和 Cr-POMIL@NCP 作为异相催化剂。它们对氧化柴油中的硫化合物以降低燃料中的硫含量非常有效。这项研究为开发生态友好型脱硫应用的创新材料提供了思路。
{"title":"Polyoxometalates ionic liquids based magnetic nanocomposites as an efficient heterogeneous catalysts for oxidation of thiobenzoic acid and dibenzothiophene by employing RP-HPLC-UV","authors":"Roman Jaffar , Najla AlMasoud , Khurram Shahzad Munawar , Sana Rauf , Taghrid S. Alomar , Hafiz Muhammad Asif , Zeinhom M. El-Bahy , Hameed Ullah , Saifullah","doi":"10.1016/j.poly.2024.117311","DOIUrl":"10.1016/j.poly.2024.117311","url":null,"abstract":"<div><div>Sulfur compounds need to be effectively rejected from fuel to maintain a clean environment. The removal of sulfur compounds from thiocompounds has received increased attention due to the negative environmental and industrial consequences of sulfur emissions. We examine the effectiveness of polyoxometalate (POM) ionic liquid-based nanocomposites as catalysts for the oxidative desulfurization of thiobenzoic acid and other sulfur-containing chemicals. Na-POMIL@NCP and Cr-POMIL@NCP were synthesized and thoroughly characterized using a variety of analytical techniques, including Fourier-transform infrared spectroscopy (FT-IR), UV–visible spectroscopy, powder X-ray diffraction (P-XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), fluorescence spectroscopy, and vibrating sample magnetometer (VSM). POMIL-based nanocomposites with Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub> exhibit both catalytic activity and adsorption capability. To evaluate sulfur removal efficiency and investigate the transformation paths of the thio compounds, high-performance liquid chromatography (HPLC) was performed at 33 °C using a C18 column with an acetonitrile–water mobile phase (1:1 ratio). The catalytic conversion of thiobenzoic acid and dibenzothiophene occurs at temperature, oxidant O/S ratio and catalyst concentration were investigated to determine the best catalyst for a given process. Under moderate conditions, this work proposes a cost-effective and ecologically acceptable approach for thiobenzoic acid (TB) and dibenzothiophene (DBT) production employing H<sub>2</sub>O<sub>2</sub> as an oxidant and Na-POMIL@NCP and Cr-POMIL@NCP as heterogeneous catalysts. They are highly effective for oxidizing sulfur compounds included in diesel to lower the sulfur levels of fuel. This study provides to the development of innovative materials for ecologically friendly sulfur removal applications.</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"266 ","pages":"Article 117311"},"PeriodicalIF":2.4,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142702202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-16DOI: 10.1016/j.poly.2024.117305
Raoudha Soury , Mahjoub Jabli , Mabrouka El Oudi , Khalaf M. Alenezi , Ahmed Al Otaibi , Fahad Abdulaziz , Hind A. AlGhamdi , Amor Bchetnia
In the current work, new complexes namely [5,10,15,20 (tetraphenylporphyrin)] /Polyethyleneimine (H2TPP-PEI) and Dichlorido(5,10,15,20-tetraphenylporphyrinato)antimony(V) hexachloridoantimonate(V)/Polyethyleneimine ([Sb(TPP)Cl2][SbCl6]-PEI) were successfully prepared and characterized. The prepared compounds were thoroughly analysed using 1H NMR, UV, XRD, XRF, TGA-DTA, SEM, and EDAX. SEM analysis showed that the addition of polyethyleneimine to the porphyrin core clearly changed the morphological properties. The optical gap values were calculated using the tauc plot method and were equal to 1.877, 2.030, 1.862, and 2.017 eV for H2TPP, [Sb(TPP)Cl2] [SbCl6], H2TPP-PEI and ([Sb(TPP)Cl2][SbCl6]-PEI), respectively. The existence of sharp peaks at 2θ between 16° and 80° displayed the crystalline nature of the prepared porphyrinic compounds. The change in thermal decompositions for H2TPP, [Sb(TPP)Cl2][SbCl6], H2TPP-PEI and ([Sb(TPP)Cl2][SbCl6]-PEI) revealed that the addition of polyethyleneimine to porphyrin affected the thermal characteristics. The prepared complexes were, further, investigated for the adsorption of Eriochrome Black T (an anionic dye) from water. Highest adsorption capacities were accomplished using [Sb(TPP)(Cl2)]-PEI (164 mg/g) and H2TPP-PEI (82 mg/g) under the following experimental conditions (pH = 5, temperature = 19 °C, time = 60 min). However, the adsorption capacities remains poor for H2TPP and Sn(TPP)(Cl2). The adsorption data complied well with pseudo second order, Freundlich, and Temkin equations. Overall, the adsorption results had confirmed that polyethyleneimine functionalized porphyrins could be used as a proficient adsorbent of anionic dyes from water.
{"title":"New complexes of [5,10,15,20-(tetraphenylporphyrin)] and dichloride (5,10,15,20-tetraphenylporphyrinato) antimony(V) hexachloridoantimonate(V) functionalized with polyethyleneimine: Synthesis, characterization, and application in Eriochrome Black T adsorption from water","authors":"Raoudha Soury , Mahjoub Jabli , Mabrouka El Oudi , Khalaf M. Alenezi , Ahmed Al Otaibi , Fahad Abdulaziz , Hind A. AlGhamdi , Amor Bchetnia","doi":"10.1016/j.poly.2024.117305","DOIUrl":"10.1016/j.poly.2024.117305","url":null,"abstract":"<div><div>In the current work, new complexes namely [5,10,15,20 (tetraphenylporphyrin)] /Polyethyleneimine (H<sub>2</sub>TPP-PEI) and Dichlorido(5,10,15,20-tetraphenylporphyrinato)antimony(V) hexachloridoantimonate(V)/Polyethyleneimine ([Sb(TPP)Cl<sub>2</sub>][SbCl<sub>6</sub>]-PEI) were successfully prepared and characterized. The prepared compounds were thoroughly analysed using <sup>1</sup>H NMR, UV, XRD, XRF, TGA-DTA, SEM, and EDAX. SEM analysis showed that the addition of polyethyleneimine to the porphyrin core clearly changed the morphological properties. The optical gap values were calculated using the tauc plot method and were equal to 1.877, 2.030, 1.862, and 2.017 eV for H<sub>2</sub>TPP, [Sb(TPP)Cl<sub>2</sub>] [SbCl<sub>6</sub>], H<sub>2</sub>TPP-PEI and ([Sb(TPP)Cl<sub>2</sub>][SbCl<sub>6</sub>]-PEI), respectively. The existence of sharp peaks at 2θ between 16° and 80° displayed the crystalline nature of the prepared porphyrinic compounds. The change in thermal decompositions for H<sub>2</sub>TPP, [Sb(TPP)Cl<sub>2</sub>][SbCl<sub>6</sub>], H<sub>2</sub>TPP-PEI and ([Sb(TPP)Cl<sub>2</sub>][SbCl<sub>6</sub>]-PEI) revealed that the addition of polyethyleneimine to porphyrin affected the thermal characteristics. The prepared complexes were, further, investigated for the adsorption of Eriochrome Black T (an anionic dye) from water. Highest adsorption capacities were accomplished using [Sb(TPP)(Cl<sub>2</sub>)]-PEI (164 mg/g) and H<sub>2</sub>TPP-PEI (82 mg/g) under the following experimental conditions (pH = 5, temperature = 19 °C, time = 60 min). However, the adsorption capacities remains poor for H<sub>2</sub>TPP and Sn(TPP)(Cl<sub>2</sub>). The adsorption data complied well with pseudo second order, Freundlich, and Temkin equations. Overall, the adsorption results had confirmed that polyethyleneimine functionalized porphyrins could be used as a proficient adsorbent of anionic dyes from water.</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"266 ","pages":"Article 117305"},"PeriodicalIF":2.4,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142702110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-15DOI: 10.1016/j.poly.2024.117301
Zhaoxun Lian, Ning Zhao
The development of innovative non-volatile storage materials is essential for the progression of next-generation high-performance storage devices. In this study, a hybrid material (Ph4P)2S7 was synthesized, and single crystal structure analysis demonstrated that the organic tetraphenylphosphonium cation (Ph)4P+ adopts a regular tetrahedral conformation and forms one-dimensional chains through CH···π interactions. The (S7)2- anion, characterized by quasi-bicentric symmetry and a right-handed helical cluster, is confined within the one-dimensional quantum well established by the (Ph)4P+ cation chain in the organic matrix. A device composed of FTO/(Ph4P)2S7/Ag was fabricated through spin-coating, demonstrating remarkable temperature-induced switchable binary write-once-read-many-times (WORM)/Flash electrical memory behavior. At room temperature, the material demonstrated nonvolatile binary WORM-type resistance switching behavior with a switching ratio of 1.95 × 103 and an onset voltage of 1.01 V. Conversely, at 150 °C, it transits into binary Flash-type resistance switching behavior characterized by current ratio of 3.34 × 102 and onset/reset voltages of 1.05/−1.99 V. The mechanism underlying binary resistive switching is identified as spatial charge-limited charge capture. Furthermore, the observed reversible transition between WORM- and Flash- type electrical memory behavior at elevated temperatures can be attributed to lattice expansion of the (Ph)4P+ cations at high temperatures, resulting in denser packing of organic molecules and deeper trapping potential wells for electrons within the active layer. This study provides theoretical insights into developing novel high-performance information storage materials.
{"title":"Synthesis of tetraphenylphosphonium/polysulfide hybrids and their temperature-induced switchable WORM/flash electrical memory behavior","authors":"Zhaoxun Lian, Ning Zhao","doi":"10.1016/j.poly.2024.117301","DOIUrl":"10.1016/j.poly.2024.117301","url":null,"abstract":"<div><div>The development of innovative non-volatile storage materials is essential for the progression of next-generation high-performance storage devices. In this study, a hybrid material (Ph<sub>4</sub>P)<sub>2</sub>S<sub>7</sub> was synthesized, and single crystal structure analysis demonstrated that the organic tetraphenylphosphonium cation (Ph)<sub>4</sub>P<sup>+</sup> adopts a regular tetrahedral conformation and forms one-dimensional chains through C<img>H···π interactions. The (S<sub>7</sub>)<sup>2-</sup> anion, characterized by quasi-bicentric symmetry and a right-handed helical cluster, is confined within the one-dimensional quantum well established by the (Ph)<sub>4</sub>P<sup>+</sup> cation chain in the organic matrix. A device composed of FTO/(Ph<sub>4</sub>P)<sub>2</sub>S<sub>7</sub>/Ag was fabricated through spin-coating, demonstrating remarkable temperature-induced switchable binary write-once-read-many-times (WORM)/Flash electrical memory behavior. At room temperature, the material demonstrated nonvolatile binary WORM-type resistance switching behavior with a switching ratio of 1.95 × 10<sup>3</sup> and an onset voltage of 1.01 V. Conversely, at 150 °C, it transits into binary Flash-type resistance switching behavior characterized by current ratio of 3.34 × 10<sup>2</sup> and onset/reset voltages of 1.05/−1.99 V. The mechanism underlying binary resistive switching is identified as spatial charge-limited charge capture. Furthermore, the observed reversible transition between WORM- and Flash- type electrical memory behavior at elevated temperatures can be attributed to lattice expansion of the (Ph)<sub>4</sub>P<sup>+</sup> cations at high temperatures, resulting in denser packing of organic molecules and deeper trapping potential wells for electrons within the active layer. This study provides theoretical insights into developing novel high-performance information storage materials.</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"266 ","pages":"Article 117301"},"PeriodicalIF":2.4,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142702203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-14DOI: 10.1016/j.poly.2024.117302
Tamer H.A. Hasanin , Manar H.A. Hamad , Nayra A.M. Moussa , Asmaa M.M. Mahmoud , Mohamed Y. El-Sayed , Al-shimaa S.M. Rady , Mahmoud A.A. Ibrahim
The sensitivity of pure and Ni-decorated boron nitride (B12N12) nanocages toward CH4, H2S, and N2 biogases was adequately unveiled by employing versatile density functional theory (DFT) calculations. In this regard, the Gas∙∙∙B12N12 and ∙∙∙Ni@B12N12 complexes were studied within all possible configurations. Based on the energetic quantities, the Ni@B12N12 nanocage exhibited higher sensitivity than the pure one toward the investigated gases. Among all studied complexes, the H2S∙∙∙Ni@B12N12 complex exhibited the most favorable adsorption (Eads) and interaction (Eint) energies with values of –29.25 and –29.46 kcal/mol, respectively. According to the outlines of the quantum theory of atoms in molecules (QTAIM) and noncovalent interaction (NCI) index analyses, the closed-shell nature of the interactions within the investigated complexes was ensured. Substantial alterations in the molecular orbitals distribution patterns of pure and Ni-decorated B12N12 nanocages were observed, announcing the occurrence of the adsorption process within the investigated complexes. The obtained negative values of thermodynamic parameters ensured the spontaneous exothermic nature of the investigated Ni-decorated complexes. Upon density of states (DOS) analysis, the influence of adsorbed gases on the electronic characteristics of the pure and Ni-decorated B12N12 nanocages was highlighted. According to the emerging findings, the pure and Ni-decorated B12N12 nanocages are promising sensing materials for biogas components, especially CH4, H2S, and N2 gases.
{"title":"Sensitivity of pure and Ni-decorated boron nitride B12N12 nanocages toward CH4, H2S, and N2 biogases: A DFT study","authors":"Tamer H.A. Hasanin , Manar H.A. Hamad , Nayra A.M. Moussa , Asmaa M.M. Mahmoud , Mohamed Y. El-Sayed , Al-shimaa S.M. Rady , Mahmoud A.A. Ibrahim","doi":"10.1016/j.poly.2024.117302","DOIUrl":"10.1016/j.poly.2024.117302","url":null,"abstract":"<div><div>The sensitivity of pure and Ni-decorated boron nitride (B<sub>12</sub>N<sub>12</sub>) nanocages toward CH<sub>4</sub>, H<sub>2</sub>S, and N<sub>2</sub> biogases was adequately unveiled by employing versatile density functional theory (DFT) calculations. In this regard, the Gas∙∙∙B<sub>12</sub>N<sub>12</sub> and ∙∙∙Ni@B<sub>12</sub>N<sub>12</sub> complexes were studied within all possible configurations. Based on the energetic quantities, the Ni@B<sub>12</sub>N<sub>12</sub> nanocage exhibited higher sensitivity than the pure one toward the investigated gases. Among all studied complexes, the H<sub>2</sub>S∙∙∙Ni@B<sub>12</sub>N<sub>12</sub> complex exhibited the most favorable adsorption (<em>E</em><sub>ads</sub>) and interaction (<em>E</em><sub>int</sub>) energies with values of –29.25 and –29.46 kcal/mol, respectively. According to the outlines of the quantum theory of atoms in molecules (QTAIM) and noncovalent interaction (NCI) index analyses, the closed-shell nature of the interactions within the investigated complexes was ensured. Substantial alterations in the molecular orbitals distribution patterns of pure and Ni-decorated B<sub>12</sub>N<sub>12</sub> nanocages were observed, announcing the occurrence of the adsorption process within the investigated complexes. The obtained negative values of thermodynamic parameters ensured the spontaneous exothermic nature of the investigated Ni-decorated complexes. Upon density of states (DOS) analysis, the influence of adsorbed gases on the electronic characteristics of the pure and Ni-decorated B<sub>12</sub>N<sub>12</sub> nanocages was highlighted. According to the emerging findings, the pure and Ni-decorated B<sub>12</sub>N<sub>12</sub> nanocages are promising sensing materials for biogas components, especially CH<sub>4</sub>, H<sub>2</sub>S, and N<sub>2</sub> gases.</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"265 ","pages":"Article 117302"},"PeriodicalIF":2.4,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Reaction of LnCl3·6H2O (Ln = Pr, Nd) with functionalized β-Diketone {ortho-hydroxydibenzoylmethane (HO-DBM)} in 1:2 ratio in methanol and in presence of triethylamine (excess) as base yielded two tetra nuclear lanthanide hydroxo clusters of composition [Ln4(O-DBM)4(HO-DBM)4(µ3-OH)2][Et3NH]2.3CH2Cl2, (Ln = Pr (1), Nd (2)). The clusters 1 and 2 has been structurally characterized by single crystal X-ray diffraction. A one-dimensional supramolecular chain is observed in the solid state structure (2), where dichloromethane solvent molecules are linked to the phenyl rings of adjacent diketone linkers through CH⋯π and Cl⋯π interactions. Theoretical studies support the stability of structure (2), with calculated geometric parameters aligning with experimental findings.
{"title":"Self-assembly of tetra nuclear lanthanide (Pr, Nd) hydroxo clusters with functionalized β-diketone: Experimental and theoretical studies","authors":"Ananda Kumar Jami , Pilli V.V.N. Kishore , Venkatesan Srinivasadesikan , Bharat Kumar Tripuramallu , Maddina Sreenivasa Rao","doi":"10.1016/j.poly.2024.117306","DOIUrl":"10.1016/j.poly.2024.117306","url":null,"abstract":"<div><div>Reaction of LnCl<sub>3</sub>·6H<sub>2</sub>O (Ln = Pr, Nd) with functionalized β-Diketone {<em>ortho</em>-hydroxydibenzoylmethane (HO-DBM)} in 1:2 ratio in methanol and in presence of triethylamine (excess) as base yielded two tetra nuclear lanthanide hydroxo clusters of composition [Ln<sub>4</sub>(O-DBM)<sub>4</sub>(HO-DBM)<sub>4</sub>(µ<sub>3</sub>-OH)<sub>2</sub>][Et<sub>3</sub>NH]<sub>2</sub><strong>.</strong>3CH<sub>2</sub>Cl<sub>2</sub>, (Ln = Pr (<strong>1</strong>), Nd (<strong>2</strong>)). The clusters <strong>1</strong> and <strong>2</strong> has been structurally characterized by single crystal X-ray diffraction. A one-dimensional supramolecular chain is observed in the solid state structure (<strong>2</strong>), where dichloromethane solvent molecules are linked to the phenyl rings of adjacent diketone linkers through C<img>H⋯π and Cl⋯π interactions. Theoretical studies support the stability of structure (2), with calculated geometric parameters aligning with experimental findings.</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"266 ","pages":"Article 117306"},"PeriodicalIF":2.4,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142702198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-13DOI: 10.1016/j.poly.2024.117303
Yuting Liu , Zixu Zhang , Dawei Yin , Yukai Huang , Ying Liu , Jinze Li , Ruilin Zheng
In this study, 1-ferrocenyl-3-(2-hydroxyphenyl) allyl ketone (probe A) was synthesized using a solvent-free method in conjunction with solid-phase grinding and employed as a probe for the detection of tryptophan (Trp). The probe exhibits selective recognition of Trp as evidenced by UV–Vis and fluorescence spectra. In complex scenarios, the probe’s recognition of Trp remains unaffected by both the presence of interfering substances and the duration of exposure. A pH range of 8 to 12 is found to be optimal for the detection of Trp. Job’s curve analysis revealed that the binding ratio between the probe and Trp is 1:1. Based on the Benesi-Hildebrand equation, the binding constant for the interaction between probe A and Trp is calculated to be 1.5 × 107 M−1. The detection limit for Trp was determined to be 9.55 × 10−5 M. The sensing mechanism of the probe for Trp was elucidated through 1H NMR and FT-IR analyses.
{"title":"A simple and highly selective chalcone fluorescent chemical sensor for the detection of tryptophane","authors":"Yuting Liu , Zixu Zhang , Dawei Yin , Yukai Huang , Ying Liu , Jinze Li , Ruilin Zheng","doi":"10.1016/j.poly.2024.117303","DOIUrl":"10.1016/j.poly.2024.117303","url":null,"abstract":"<div><div>In this study, 1-ferrocenyl-3-(2-hydroxyphenyl) allyl ketone (probe A) was synthesized using a solvent-free method in conjunction with solid-phase grinding and employed as a probe for the detection of tryptophan (Trp). The probe exhibits selective recognition of Trp as evidenced by UV–Vis and fluorescence spectra. In complex scenarios, the probe’s recognition of Trp remains unaffected by both the presence of interfering substances and the duration of exposure. A pH range of 8 to 12 is found to be optimal for the detection of Trp. Job’s curve analysis revealed that the binding ratio between the probe and Trp is 1:1. Based on the Benesi-Hildebrand equation, the binding constant for the interaction between probe A and Trp is calculated to be 1.5 × 10<sup>7</sup> M<sup>−1</sup>. The detection limit for Trp was determined to be 9.55 × 10<sup>−5</sup> M. The sensing mechanism of the probe for Trp was elucidated through <sup>1</sup>H NMR and FT-IR analyses.</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"265 ","pages":"Article 117303"},"PeriodicalIF":2.4,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-12DOI: 10.1016/j.poly.2024.117300
Yuwan Yang , Jianan Yang , Yongjian Qiu , Lin Lei , Songlin Ye , Enqi Xu , Yaju Chen
The oxidation reaction involving hydrogen peroxide (H2O2) in water is of great attraction in fundamental research and industrial application, but there is still a long way to go. Herein, a new hybrid catalyst PW@Py-HIP was successfully synthesized by immobilization of phosphotungstic anions onto/into the pyridinium-based hyper-crosslinked ionic polymer using a post-synthetic strategy. This facile synthetic method afforded heterogeneous catalyst with a large specific surface area of 428.7 m2·g−1 and stable polymeric skeleton. The amphiphilic PW@Py-HIP exhibited remarkable catalytic activity and quantitative selectivity for the oxidation of alcohols into carbonyl compounds with H2O2 in water. The turnover frequency (TOF) and turnover number (TON) values reached 1088.9 h−1 and 4083.3, respectively. Owing to its good heterogeneous nature, PW@Py-HIP can be recycled for six times without significant loss of activity. The developed catalytic system confirmed to be beneficial toward the synthesis of related carbonyl compounds from various alcohols with appreciable conversions.
{"title":"Oxidation of alcohols to carbonyl compounds with H2O2 in water catalyzed by polyoxometalate-based hyper-crosslinked ionic polymer","authors":"Yuwan Yang , Jianan Yang , Yongjian Qiu , Lin Lei , Songlin Ye , Enqi Xu , Yaju Chen","doi":"10.1016/j.poly.2024.117300","DOIUrl":"10.1016/j.poly.2024.117300","url":null,"abstract":"<div><div>The oxidation reaction involving hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) in water is of great attraction in fundamental research and industrial application, but there is still a long way to go. Herein, a new hybrid catalyst PW@Py-HIP was successfully synthesized by immobilization of phosphotungstic anions onto/into the pyridinium-based hyper-crosslinked ionic polymer using a post-synthetic strategy. This facile synthetic method afforded heterogeneous catalyst with a large specific surface area of 428.7 m<sup>2</sup>·g<sup>−1</sup> and stable polymeric skeleton. The amphiphilic PW@Py-HIP exhibited remarkable catalytic activity and quantitative selectivity for the oxidation of alcohols into carbonyl compounds with H<sub>2</sub>O<sub>2</sub> in water. The turnover frequency (TOF) and turnover number (TON) values reached 1088.9 h<sup>−1</sup> and 4083.3, respectively. Owing to its good heterogeneous nature, PW@Py-HIP can be recycled for six times without significant loss of activity. The developed catalytic system confirmed to be beneficial toward the synthesis of related carbonyl compounds from various alcohols with appreciable conversions.</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"265 ","pages":"Article 117300"},"PeriodicalIF":2.4,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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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