Three novel mixed-ligand Ni(II) complexes were synthesized from 3,5-dihalogenosalicyladehyde-S-methyl isothiosemicarbazone ligand (3,5-dichloro for Complex I, 3,5-dibromo for Complex II, and 3,5-diiodo for Complex III) and diethanolamine. The synthesized compounds were characterized by elemental analysis, FT-IR, UV-Vis and 1H-NMR spectroscopies. Solid-state structures of Complex I and Complex II have been determined by single-crystal X-ray diffraction technique. Both the complexes were found to have distorted square planar geometry, with coordination of azomethine nitrogen, phenolate oxygen, terminal amine of thiosemicarbazone ligand and amine nitrogen of diethanolamine. The cytotoxic effects of the ligands and the complexes were evaluated against two different types of cancer cells (THP-1 human leukaemia monocytic cell line and MDA-MB-231 aggressive breast cancer cell line) and healthy cell (HUVEC Human umbilical vein endothelial cell line) by using MTT method. The findings demonstrated that the chloro-derivatives exhibited better efficacy compared to cisplatin in targeting the monocytic leukemia cell line while displaying reduced toxicity towards healthy cells.
由 3,5-二卤代水杨醛-S-甲基异硫代氨基甲酮配体（3,5-二氯配体 I、3,5-二溴配体 II 和 3,5-二碘配体 III）和二乙醇胺合成了三种新型混合配体 Ni(II) 复合物。合成的化合物通过元素分析、傅立叶变换红外光谱、紫外可见光谱和 1H-NMR 光谱进行了表征。通过单晶 X 射线衍射技术确定了络合物 I 和络合物 II 的固态结构。研究发现，这两种复合物都具有扭曲的方形平面几何结构，其中偶氮甲基氮、苯酚氧、硫代氨基羰基配体的末端胺和二乙醇胺的胺氮配位。利用 MTT 法评估了配体和复合物对两种不同类型的癌细胞（THP-1 人白血病单核细胞系和 MDA-MB-231 侵袭性乳腺癌细胞系）和健康细胞（HUVEC 人脐静脉内皮细胞系）的细胞毒性作用。研究结果表明，与顺铂相比，氯代衍生物在针对单核白血病细胞系方面具有更好的疗效，同时对健康细胞的毒性也有所降低。
{"title":"Synthesis, Cytotoxicities, Structural Properties and Comparison of Dihalogenosubstituted-thiosemicarbazone ligands and Mixed-Ligand Ni(II) Complexes","authors":"Elif AVCU ALTIPARMAK, Güneş ÖZEN EROĞLU, Namık Özdemir, Serap Erdem Kuruca, Tulay Bal-Demirci","doi":"10.1039/d4dt02774d","DOIUrl":"https://doi.org/10.1039/d4dt02774d","url":null,"abstract":"Three novel mixed-ligand Ni(II) complexes were synthesized from 3,5-dihalogenosalicyladehyde-S-methyl isothiosemicarbazone ligand (3,5-dichloro for Complex I, 3,5-dibromo for Complex II, and 3,5-diiodo for Complex III) and diethanolamine. The synthesized compounds were characterized by elemental analysis, FT-IR, UV-Vis and 1H-NMR spectroscopies. Solid-state structures of Complex I and Complex II have been determined by single-crystal X-ray diffraction technique. Both the complexes were found to have distorted square planar geometry, with coordination of azomethine nitrogen, phenolate oxygen, terminal amine of thiosemicarbazone ligand and amine nitrogen of diethanolamine. The cytotoxic effects of the ligands and the complexes were evaluated against two different types of cancer cells (THP-1 human leukaemia monocytic cell line and MDA-MB-231 aggressive breast cancer cell line) and healthy cell (HUVEC Human umbilical vein endothelial cell line) by using MTT method. The findings demonstrated that the chloro-derivatives exhibited better efficacy compared to cisplatin in targeting the monocytic leukemia cell line while displaying reduced toxicity towards healthy cells.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"37 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142665337","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}
Ziyu Wang, Yifan Song, Ruiqi Li, Risheng Li, Run-Ping Jia, Kunliang Nie, Xiaowei Xu, Lin Lin, Haijiao Xie
The manipulation of oxygen vacancies is regarded as a viable approach to enhance the electrochemical properties of electrode materials. Herein, the NiAl-LDH nanosheets with rich oxygen vacancies were successfully synthesized on the surface of nickel foam via a conventiaonal hydrothemal and chemical reduction strategy. The oxygen vacancies were introduced and modulated via NaBH4 treatment, significantly enhancing the electrochemical properties. The oxygen-vacancy abundant NiAl-LDH electrode materials show a high capacitance of 4028 F cm-2 at the current density of 2 mA cm-2 and obtain a high capacity retention of 3000 F cm-2 even at a current density of up to 20 mA cm-2. In addition, the symmetric SC device achieves a notable energy density of 71.3 Wh kg-1 while operating at a power density of 2400 W kg-1. The empirical and theoretical findings demonstrate that the incorporation of oxygen vacancy significantly contributes to the improvement of the electrochemical characteristics of LDH electrode materials. The samples discussed in this work have the potential to serve as advanced electrode materials for supercapacitors in high-capacity energy storage devices.
操纵氧空位被认为是提高电极材料电化学性能的一种可行方法。在此，通过常规的水化和化学还原策略，成功地在泡沫镍表面合成了富含氧空位的 NiAl-LDH 纳米片。通过 NaBH4 处理引入并调节氧空位，显著提高了电化学性能。氧空位丰富的 NiAl-LDH 电极材料在电流密度为 2 mA cm-2 时显示出 4028 F cm-2 的高电容，即使在电流密度高达 20 mA cm-2 时也能获得 3000 F cm-2 的高电容保持率。此外，对称 SC 器件的能量密度高达 71.3 Wh kg-1，而工作功率密度则为 2400 W kg-1。经验和理论研究结果表明，氧空位的加入大大有助于改善 LDH 电极材料的电化学特性。本研究中讨论的样品有望成为大容量储能设备中超级电容器的先进电极材料。
{"title":"Fabrication of Oxygen-Vacancy Abundant NiAl-Layered Double Hydroxides for Ultrahigh Capacity Supercapacitors","authors":"Ziyu Wang, Yifan Song, Ruiqi Li, Risheng Li, Run-Ping Jia, Kunliang Nie, Xiaowei Xu, Lin Lin, Haijiao Xie","doi":"10.1039/d4dt02351j","DOIUrl":"https://doi.org/10.1039/d4dt02351j","url":null,"abstract":"The manipulation of oxygen vacancies is regarded as a viable approach to enhance the electrochemical properties of electrode materials. Herein, the NiAl-LDH nanosheets with rich oxygen vacancies were successfully synthesized on the surface of nickel foam via a conventiaonal hydrothemal and chemical reduction strategy. The oxygen vacancies were introduced and modulated via NaBH4 treatment, significantly enhancing the electrochemical properties. The oxygen-vacancy abundant NiAl-LDH electrode materials show a high capacitance of 4028 F cm-2 at the current density of 2 mA cm-2 and obtain a high capacity retention of 3000 F cm-2 even at a current density of up to 20 mA cm-2. In addition, the symmetric SC device achieves a notable energy density of 71.3 Wh kg-1 while operating at a power density of 2400 W kg-1. The empirical and theoretical findings demonstrate that the incorporation of oxygen vacancy significantly contributes to the improvement of the electrochemical characteristics of LDH electrode materials. The samples discussed in this work have the potential to serve as advanced electrode materials for supercapacitors in high-capacity energy storage devices.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"51 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142665572","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}
Although Zeolitic imidazolate frameworks (ZIFs) is widely applied in energy storage and catalysis fields, its multifunction applications are extremely limited by its closed rhombohedral dodecahedron structure. Herein, bimetallic CoFe-ZIF with an open nanoflower structure is synthesized by a simple one-step stirring strategy at room temperature. CoFe-ZIF exhibits superior sodium-ion storage performance as the anode for sodium-ion batteries (SIBs) and glucose sensing performance as the electrode for non-enzymatic glucose sensor, as a result of synergistic effect between metal ions and highly-open nanoflower structure. CoFe-ZIF exhibits a specific capacity of 410.32 mA h/g at the current density of 0.10 A/g after 500 cycles for SIBs and a high sensitivity of 1484.22 μA mM−1 cm−2 in the range of 0.30-2.00 mM for glucose sensor, which also shows a low detection limit of less than 25 μM. This work also provides insight to design bimetallic MOFs by a simple strategy for multifunctional device applications.
{"title":"Bifunctional bimetallic Zeolitic imidazolate frameworks with nanoflower structure for sodium-ion storage and non-enzymatic glucose sensing","authors":"Jingjing Liu, Yu Shi, Jianhua Xu, Yajie Yang","doi":"10.1039/d4dt02779e","DOIUrl":"https://doi.org/10.1039/d4dt02779e","url":null,"abstract":"Although Zeolitic imidazolate frameworks (ZIFs) is widely applied in energy storage and catalysis fields, its multifunction applications are extremely limited by its closed rhombohedral dodecahedron structure. Herein, bimetallic CoFe-ZIF with an open nanoflower structure is synthesized by a simple one-step stirring strategy at room temperature. CoFe-ZIF exhibits superior sodium-ion storage performance as the anode for sodium-ion batteries (SIBs) and glucose sensing performance as the electrode for non-enzymatic glucose sensor, as a result of synergistic effect between metal ions and highly-open nanoflower structure. CoFe-ZIF exhibits a specific capacity of 410.32 mA h/g at the current density of 0.10 A/g after 500 cycles for SIBs and a high sensitivity of 1484.22 μA mM−1 cm−2 in the range of 0.30-2.00 mM for glucose sensor, which also shows a low detection limit of less than 25 μM. This work also provides insight to design bimetallic MOFs by a simple strategy for multifunctional device applications.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"21 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142665341","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}
Ashish Kumar, Dooyoung Kim, Giao Nguyen, Chenggang Jiang, Soumi Chakraborty, Thomas S Teets
A series of heteroleptic copper(I) β-diketiminate triarylphosphine complexes is reported, having the general formula Cu(R1NacNacR2)(PPhX3), where R1NacNacR2 is a substituted β-diketiminate and PPhX3 is a triphenylphosphine derivative. A total of five different R1NacNacR2 ligands and three different triarylphosphines are used to assemble the nine complexes. The syntheses, X-ray crystal structures, cyclic voltammograms, and UV-vis absorption spectra of all compounds are described. Whereas most of the compounds are weakly luminescent or only luminesce at 77 K, the four complexes with the more sterically encumbered β-diketiminate ligands, with methyl or isopropyl substituents at the 2- and 6-positions of the N-phenyl rings, exhibit weak room-temperature photoluminescence with peaks between 519 and 566 nm and long excited-state lifetimes in the range of 15-70 μs. The sterically encumbering substituents in this subset have subtle effects on the UV-vis absorption maximum, which red shifts slightly as the steric bulk increases, as well as significant effects on the photoluminescence lifetime, which is observed to increase as the steric bulk is augmented. Substituents on the triarylphosphine also influence the excited-state dynamics in the bulky complexes, with the more electron-rich tris(4-methoxyphenyl)phosphine (PPhOMe3) giving longer-excited-state lifetimes compared to triphenylphosphine (PPh3) when the same R1NacNacR2 ligand is used.
{"title":"Photophysical properties of three-coordinate heteroleptic Cu(I) β-diketiminate triarylphosphine complexes.","authors":"Ashish Kumar, Dooyoung Kim, Giao Nguyen, Chenggang Jiang, Soumi Chakraborty, Thomas S Teets","doi":"10.1039/d4dt02681k","DOIUrl":"https://doi.org/10.1039/d4dt02681k","url":null,"abstract":"<p><p>A series of heteroleptic copper(I) β-diketiminate triarylphosphine complexes is reported, having the general formula Cu(R<sup>1</sup>NacNac<sup>R2</sup>)(PPh<sup>X</sup><sub>3</sub>), where R<sup>1</sup>NacNac<sup>R2</sup> is a substituted β-diketiminate and PPh<sup>X</sup><sub>3</sub> is a triphenylphosphine derivative. A total of five different R<sup>1</sup>NacNac<sup>R2</sup> ligands and three different triarylphosphines are used to assemble the nine complexes. The syntheses, X-ray crystal structures, cyclic voltammograms, and UV-vis absorption spectra of all compounds are described. Whereas most of the compounds are weakly luminescent or only luminesce at 77 K, the four complexes with the more sterically encumbered β-diketiminate ligands, with methyl or isopropyl substituents at the 2- and 6-positions of the <i>N</i>-phenyl rings, exhibit weak room-temperature photoluminescence with peaks between 519 and 566 nm and long excited-state lifetimes in the range of 15-70 μs. The sterically encumbering substituents in this subset have subtle effects on the UV-vis absorption maximum, which red shifts slightly as the steric bulk increases, as well as significant effects on the photoluminescence lifetime, which is observed to increase as the steric bulk is augmented. Substituents on the triarylphosphine also influence the excited-state dynamics in the bulky complexes, with the more electron-rich tris(4-methoxyphenyl)phosphine (PPh<sup>OMe</sup><sub>3</sub>) giving longer-excited-state lifetimes compared to triphenylphosphine (PPh<sub>3</sub>) when the same R<sup>1</sup>NacNac<sup>R2</sup> ligand is used.</p>","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142646098","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}
Narrow band green emitting phosphors have got widespread attention due to their application in white light emitting diodes (WLEDs) backlight displays. The commercial backlight displays are having a broad band green phosphor which limits their performance. In this work, bright, narrow and thermally stable green emitting MgGa2O4:Mn2+ (MGO-Mn) has been synthesized Time-resolved emission spectroscopy suggested that Mn2+ ions are distributed at both Mg2+ and Ga3+ sites in MGO spinel which resulted in high internal quantum efficiency of 63%. The colour purity of the MGO-Mn (76.4%) superseded that of commercial green phosphor β-SiAlON:Eu2+ (59.12%). Doping induced creation of oxygen vacancy impart MGO-Mn with excellent persistent luminescence with time duration of more than 900 sec on 1 min charging with 270 nm UV light and persistence radioluminescence of more than 6000 sec when charged with X-rays for 1 min. Finally, tunable white LEDs (cool and neutral white LED) are fabricated by combining the RGB mixture of the green phosphor with commercial red and blue phosphor along with a 280 nm UV LED chip. This work also provides importance of different annealing atmosphere on the photoluminescence and persistence luminescence of the MGO-Mn phosphor.
{"title":"Bright and Persistent Green Emitting MgGa2O4:Mn2+ for Phosphor Converted White Light Emitting Diodes","authors":"Reshmi Thekke Parayil, Santosh Kumar Gupta, Malini Abraham, Deepak Tyagi, Subrata Das, Mohit Tyagi, Narendra Singh Rawat, Manoj Mohapatra","doi":"10.1039/d4dt02960g","DOIUrl":"https://doi.org/10.1039/d4dt02960g","url":null,"abstract":"Narrow band green emitting phosphors have got widespread attention due to their application in white light emitting diodes (WLEDs) backlight displays. The commercial backlight displays are having a broad band green phosphor which limits their performance. In this work, bright, narrow and thermally stable green emitting MgGa2O4:Mn2+ (MGO-Mn) has been synthesized Time-resolved emission spectroscopy suggested that Mn2+ ions are distributed at both Mg2+ and Ga3+ sites in MGO spinel which resulted in high internal quantum efficiency of 63%. The colour purity of the MGO-Mn (76.4%) superseded that of commercial green phosphor β-SiAlON:Eu2+ (59.12%). Doping induced creation of oxygen vacancy impart MGO-Mn with excellent persistent luminescence with time duration of more than 900 sec on 1 min charging with 270 nm UV light and persistence radioluminescence of more than 6000 sec when charged with X-rays for 1 min. Finally, tunable white LEDs (cool and neutral white LED) are fabricated by combining the RGB mixture of the green phosphor with commercial red and blue phosphor along with a 280 nm UV LED chip. This work also provides importance of different annealing atmosphere on the photoluminescence and persistence luminescence of the MGO-Mn phosphor.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"72 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142665338","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}
Fanle Meng, Zihong Ye, Hongwei Zhu, Lianghe Sun, Ming Lu, Yuangang Xu
As a new type of polynitrogen species that is stable at room temperature, pentazolate anion (cyclo-N5−) has attracted much attention in the field of high-energy-density materials, but its energy and stability are unbalanced. Cocrystallisation can balance their properties to some extent by forming new chemical compositions from existing cyclo-N5− compounds through non-covalent interactions. This article reviews the research progress of cyclo-N5− cocrystals in recent years, including synthetic methods, cocrystals of metal-N5− compounds, and cocrystals of nonmetallic pentazolate salts. The cocrystals of metal-N5− compounds mainly includes metal-N5− solvates, cocrystals composed of metal-N5− compounds and amines/MSM, and metal containing composite salts; The cocrystals of nonmetallic pentazolate salts includes cocrystals composed of cyclo-N5− salts and solvents, cocrystals composed of cyclo-N5− salts and N-heterocyclic molecules, and non-metallic composite salts. The fascinating crystal structures (in some cases topological structures), stable forms, and physicochemical properties of representative cocrystals were highlighted. In addition, the future directions that need to be focused on in this field were pointed out, including the development of more preparation methods, especially those suitable for scaling up; higher precision calculation or testing of enthalpy of formation; improvement of their thermal stabilities; creation cocrystals of cyclo-N5− salts and high-density, high oxygen balance, high-energy oxidizer; and exploration of formation mechanism.
{"title":"Syntheses and properties of energetic cyclo-pentazolate cocrystals","authors":"Fanle Meng, Zihong Ye, Hongwei Zhu, Lianghe Sun, Ming Lu, Yuangang Xu","doi":"10.1039/d4dt02727b","DOIUrl":"https://doi.org/10.1039/d4dt02727b","url":null,"abstract":"As a new type of polynitrogen species that is stable at room temperature, pentazolate anion (cyclo-N5−) has attracted much attention in the field of high-energy-density materials, but its energy and stability are unbalanced. Cocrystallisation can balance their properties to some extent by forming new chemical compositions from existing cyclo-N5− compounds through non-covalent interactions. This article reviews the research progress of cyclo-N5− cocrystals in recent years, including synthetic methods, cocrystals of metal-N5− compounds, and cocrystals of nonmetallic pentazolate salts. The cocrystals of metal-N5− compounds mainly includes metal-N5− solvates, cocrystals composed of metal-N5− compounds and amines/MSM, and metal containing composite salts; The cocrystals of nonmetallic pentazolate salts includes cocrystals composed of cyclo-N5− salts and solvents, cocrystals composed of cyclo-N5− salts and N-heterocyclic molecules, and non-metallic composite salts. The fascinating crystal structures (in some cases topological structures), stable forms, and physicochemical properties of representative cocrystals were highlighted. In addition, the future directions that need to be focused on in this field were pointed out, including the development of more preparation methods, especially those suitable for scaling up; higher precision calculation or testing of enthalpy of formation; improvement of their thermal stabilities; creation cocrystals of cyclo-N5− salts and high-density, high oxygen balance, high-energy oxidizer; and exploration of formation mechanism.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"225 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142665342","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}
A phosphine-based novel pincer chromium (II) catalyst CrCl2(PONNH) (Cr-1) is reported. The complex exhibited promising catalytic performance in C-C and C-N bond formation by borrowing hydrogen methodology. The Cr-1 catalyzed α-alkylation of ketones using primary alcohols as alkyl surrogates in the presence of catalytic amount of base. The catalyst was also found to perform β-alkylation of secondary alcohols with primary alcohols. In addition, dehydrogenative annulation of 2-aminobenzyl alcohols with ketones to form quinolines was also achieved using Cr-1. Supported by the mechanistic investigation, a plausible mechanism based on metal-ligand cooperation is proposed. The reactions are redox-neutral, atom efficient, producing water as the only by-product, thus contributing towards the sustainable development.
{"title":"Chromium Catalyzed Sustainable C-C and C-N Bond Formation: C-Alkylation and Friedländer Quinoline Synthesis Using Alcohols","authors":"Vaishnavi Atreya, Sachin Jalwal, Subrata Chakraborty","doi":"10.1039/d4dt01481b","DOIUrl":"https://doi.org/10.1039/d4dt01481b","url":null,"abstract":"A phosphine-based novel pincer chromium (II) catalyst CrCl2(PONNH) (Cr-1) is reported. The complex exhibited promising catalytic performance in C-C and C-N bond formation by borrowing hydrogen methodology. The Cr-1 catalyzed α-alkylation of ketones using primary alcohols as alkyl surrogates in the presence of catalytic amount of base. The catalyst was also found to perform β-alkylation of secondary alcohols with primary alcohols. In addition, dehydrogenative annulation of 2-aminobenzyl alcohols with ketones to form quinolines was also achieved using Cr-1. Supported by the mechanistic investigation, a plausible mechanism based on metal-ligand cooperation is proposed. The reactions are redox-neutral, atom efficient, producing water as the only by-product, thus contributing towards the sustainable development.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"169 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142665339","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}
Wenyu Dong, Zhaoxu Wang, Cai Zuxian, Deng Yiqiang, Guanyu Wang, Baishu Zheng
Incorporating multiple functional sites in porous frameworks to enormously enhance the host-guest interactions is an effective strategy to obtain high-performance CO2 capture and chemical fixation MOF materials. Herein, we designed and constructed a microporous (3, 36)-connected txt-type Cu(II)-based MOF (HNUST-17) from dicopper(II)-paddlewheel clusters and a novel pyridine-based acylamide-linking V-shape diisophthalate ligand with amino groups. Interestingly, with a high density of multiple strong CO2-philic sites (open metal sites, acylamide and amino functionalities) integrated in the framework, which have been identified by GCMC (Grand canonical Monte Carlo) simulations and DFT (Density functional theory) calculations, HNUST-17 exhibits high and selective capture for CO2 over CH4 and N2 at ambient temperature. Moreover, HNUST-17 possesses efficiently catalytic activity and recyclability for chemical fixation of CO2 coupling with epoxides into cyclic carbonates in the presence of tetrabutylammonium bromide as the cocatalyst under mild, solvent-free conditions.
在多孔框架中加入多个功能位点以极大地增强主客体之间的相互作用是获得高性能二氧化碳捕获和化学固定MOF材料的有效策略。在此，我们设计并构建了一种微孔（3，36）连接的 Txt 型铜（II）基 MOF（HNUST-17），该材料由二铜（II）-桨轮团簇和一种新型吡啶基酰基酰胺连接的 V 型带氨基的邻苯二甲酸二异酯配体组成。有趣的是，通过 GCMC（大规范蒙特卡洛）模拟和 DFT（密度泛函理论）计算，HNUST-17 的框架中集成了高密度的多个强 CO2 亲位（开放金属位、酰基酰胺和氨基官能团），因此在环境温度下，HNUST-17 对 CO2 的捕获率和选择性都很高，超过了对 CH4 和 N2 的捕获率。此外，HNUST-17 还具有高效的催化活性和可回收性，可在温和、无溶剂的条件下，在四丁基溴化铵作为助催化剂的存在下，将 CO2 与环氧化物偶联化学固定为环状碳酸盐。
{"title":"Highly efficient CO2 capture and chemical fixation of a microporous (3, 36)-connected txt-type Cu(II)-MOF with multifunctional sites","authors":"Wenyu Dong, Zhaoxu Wang, Cai Zuxian, Deng Yiqiang, Guanyu Wang, Baishu Zheng","doi":"10.1039/d4dt01531b","DOIUrl":"https://doi.org/10.1039/d4dt01531b","url":null,"abstract":"Incorporating multiple functional sites in porous frameworks to enormously enhance the host-guest interactions is an effective strategy to obtain high-performance CO2 capture and chemical fixation MOF materials. Herein, we designed and constructed a microporous (3, 36)-connected txt-type Cu(II)-based MOF (HNUST-17) from dicopper(II)-paddlewheel clusters and a novel pyridine-based acylamide-linking V-shape diisophthalate ligand with amino groups. Interestingly, with a high density of multiple strong CO2-philic sites (open metal sites, acylamide and amino functionalities) integrated in the framework, which have been identified by GCMC (Grand canonical Monte Carlo) simulations and DFT (Density functional theory) calculations, HNUST-17 exhibits high and selective capture for CO2 over CH4 and N2 at ambient temperature. Moreover, HNUST-17 possesses efficiently catalytic activity and recyclability for chemical fixation of CO2 coupling with epoxides into cyclic carbonates in the presence of tetrabutylammonium bromide as the cocatalyst under mild, solvent-free conditions.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"1 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142642695","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}
Si Si, Wenxun Song, Jie Chen, Weimin Zhang, Wenhua Ji, Wonwoo Nam, Bin Wang
Neutral nickel complexes bearing tetradentate N-heterocyclic carbene (NHC) amidate ligands were prepared; the effects of coordination geometry of the nickel center and the electronic properties of the ligand on the redox behavior as well as the electrocatalytic activity for hydrogen evolution reaction (HER) were investigated.
研究了镍中心的配位几何和配体的电子特性对氧化还原行为以及氢进化反应（HER）电催化活性的影响。
{"title":"Neutral nickel complexes with tetradentate N-heterocyclic carbene amidate ligands for electrocatalytic hydrogen evolution","authors":"Si Si, Wenxun Song, Jie Chen, Weimin Zhang, Wenhua Ji, Wonwoo Nam, Bin Wang","doi":"10.1039/d4dt02746a","DOIUrl":"https://doi.org/10.1039/d4dt02746a","url":null,"abstract":"Neutral nickel complexes bearing tetradentate N-heterocyclic carbene (NHC) amidate ligands were prepared; the effects of coordination geometry of the nickel center and the electronic properties of the ligand on the redox behavior as well as the electrocatalytic activity for hydrogen evolution reaction (HER) were investigated.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"1 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142637487","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}
Hannah Naldrett, Csilla Fekete, Robert Bartlett, Zoltán Benkő, Steven Schwendeman, Gergely Lautner
Inhaled nitric oxide (iNO) is a lifesaving, FDA-approved drug to improve oxygenation in persistent pulmonary hypertension of the newborn. iNO also has many other applications in lung diseases owing to its vasodilatory and antimicrobial effects. However, its wider therapeutic application is often prohibited by the high cost and logistical barriers of traditional NO/N2 gas tanks. Development of low-cost portable and tankless nitric oxide (NO) generators is a critical need to advance iNO therapy. Here, we describe the feasibility of NO generation by the controlled reduction of nitrite (NO2-) ions. This was accomplished by using ascorbate to reduce NO2- ions mediated by a copper(I/II) redox pair complexed by an azo-crown ether ligand ([Cu(II)L]2+/[Cu(I)L]+) in the solution phase. We found that oxalate, a decomposition product of ascorbate, interferes with the NO generation from the copper-ligand complex. This interference was mitigated, and the reaction was further optimized. NO generation through this method was found to be highly controllable via its proportionality to the flow rate of nitrite injected into a reaction chamber containing the reducing components. Hence, this simple approach adds to the current collection of innovative methods under development to obviate the use of NO tanks for iNO delivery.
{"title":"Feasibility of controlled nitric oxide generation via ascorbate induced chemical reduction of nitrite ions.","authors":"Hannah Naldrett, Csilla Fekete, Robert Bartlett, Zoltán Benkő, Steven Schwendeman, Gergely Lautner","doi":"10.1039/d4dt01980f","DOIUrl":"https://doi.org/10.1039/d4dt01980f","url":null,"abstract":"Inhaled nitric oxide (iNO) is a lifesaving, FDA-approved drug to improve oxygenation in persistent pulmonary hypertension of the newborn. iNO also has many other applications in lung diseases owing to its vasodilatory and antimicrobial effects. However, its wider therapeutic application is often prohibited by the high cost and logistical barriers of traditional NO/N<small><sub>2</sub></small> gas tanks. Development of low-cost portable and tankless nitric oxide (NO) generators is a critical need to advance iNO therapy. Here, we describe the feasibility of NO generation by the controlled reduction of nitrite (NO<small><sub>2</sub></small><small><sup>-</sup></small>) ions. This was accomplished by using ascorbate to reduce NO<small><sub>2</sub></small><small><sup>-</sup></small> ions mediated by a copper(I/II) redox pair complexed by an azo-crown ether ligand ([Cu(II)L]<small><sup>2+</sup></small>/[Cu(I)L]<small><sup>+</sup></small>) in the solution phase. We found that oxalate, a decomposition product of ascorbate, interferes with the NO generation from the copper-ligand complex. This interference was mitigated, and the reaction was further optimized. NO generation through this method was found to be highly controllable via its proportionality to the flow rate of nitrite injected into a reaction chamber containing the reducing components. Hence, this simple approach adds to the current collection of innovative methods under development to obviate the use of NO tanks for iNO delivery.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"27 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142637815","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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