Dalton Transactions最新文献_第10页

Interfacing CuO, CuBi2O4, and protective metal oxide layers to boost solar-driven photoelectrochemical hydrogen evolution

IF 4 3区化学

Dalton Transactions Pub Date : 2024-12-04 DOI: 10.1039/d4dt02738h

Cathal Burns, Muhammed Rishan Kappattu Kizhakkayil, Owen Woodford, Susanna L Stephens, Linsey Fuller, Shafeer Kalathil, Elizabeth Gibson

{"title":"Interfacing CuO, CuBi2O4, and protective metal oxide layers to boost solar-driven photoelectrochemical hydrogen evolution","authors":"Cathal Burns, Muhammed Rishan Kappattu Kizhakkayil, Owen Woodford, Susanna L Stephens, Linsey Fuller, Shafeer Kalathil, Elizabeth Gibson","doi":"10.1039/d4dt02738h","DOIUrl":"https://doi.org/10.1039/d4dt02738h","url":null,"abstract":"This article reports the development of CuO|CuBi₂O₄ photocathodes stabilized by protective layers of TiO₂, MgO, or NiO, with Pt or MoS₂ nanoparticles serving as co-catalysts to facilitate H₂ evolution. Most notably, this work demonstrates the first application of MgO as a protection/passivation layer for photocathodes in a water-splitting cell. All configurations of photocathodes were studied structurally, morphologically, and photoelectrochemically revealing that CuO|CuBi₂O₄|MgO|Pt photocathodes achieve the highest stable photocurrent densities of -200 µA cm⁻² for over 3 hours with a Faradaic efficiency of ~90%. Bias-free tandem water splitting was then performed by pairing this photocathode with a dye-sensitized TiO₂ photoanode, producing H₂ from neutral water without an external bias. This paper demonstrates key stability findings and proposes the use of spin-coated MgO, TiO2, and NiO as feasible earth-abundant protective materials to aid in the formation of a cheap and scalable tandem water splitting system. Charge transfer dynamics have also been probed by combining spectroelectrochemistry and in-situ transient absorption spectroscopy.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"13 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142763166","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}

引用次数: 0

Silver(I)-Iodine Cluster with Efficient Thermally Activated Delayed Fluorescence and Suppressed Concentration Quenching

IF 4 3区化学

Dalton Transactions Pub Date : 2024-12-03 DOI: 10.1039/d4dt02855d

Xiao Li, shanyue Wei, Dong-Hai Zhang, Jia-Xuan Hu, Chenlu Hou, Ting-Ting Lin, Xu-Lin Chen, Can-Zhong Lu

{"title":"Silver(I)-Iodine Cluster with Efficient Thermally Activated Delayed Fluorescence and Suppressed Concentration Quenching","authors":"Xiao Li, shanyue Wei, Dong-Hai Zhang, Jia-Xuan Hu, Chenlu Hou, Ting-Ting Lin, Xu-Lin Chen, Can-Zhong Lu","doi":"10.1039/d4dt02855d","DOIUrl":"https://doi.org/10.1039/d4dt02855d","url":null,"abstract":"Reports on highly efficient silver(I)-based thermally activated delayed fluorescence (TADF) materials are scarce due to challenges in molecular design, although these materials show great potential for photoluminescent and electroluminescent applications. Herein, a silver(I)-iodine cluster, namely Ag2I2[dppb-Ac]2, is synthesized by employing a donor-acceptor (D-A) type bisphosphine ligand. Due to the introduction of electron-donating iodine ligands, [dppb-Ac]2Ag2I2 exhibits an emissive singlet state characterized by (metal + iodine)-to-ligand charge transfer and intra-ligand charge transfer transitions, as well as a small singlet-triplet energy gap. Additionally, its non-planar, highly distorted D-A structure efficiently separates adjacent molecules in aggregated state. As a result, Ag2I2[dppb-Ac]2 exhibits efficient TADF and suppressed luminescence concentration quenching in thin films. For instance, the 10 wt%-doped PMMA film and neat film of Ag2I2[dppb-Ac]2 display bright bluish-green and green emissions, peaking at 506 and 532 nm, with photoluminescence quantum yields (PLQYs) of 70% and 52%, and lifetimes of 18.9 and 7.9 μs, respectively. The high PLQYs and efficiently suppressed emission concentration quenching of Ag2I2[dppb-Ac]2 in films are outstanding among reported Ag(I)-based TADF emitters.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"26 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142760750","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}

引用次数: 0

Structural and Optical Studies of Fluoride ion binding using N-heteroaromatic based ligands.

IF 4 3区化学

Dalton Transactions Pub Date : 2024-12-03 DOI: 10.1039/d4dt02857k

Priyanka R Angarkhe, Satyajit Sahoo, Simran Singh Deo, Kripa S. R. Shankar, Manav Upadhyay, Kuldeep Mahiya, Jagnyaseni Tripathy, Rakesh K Behera, Swagat K Mohapatra

{"title":"Structural and Optical Studies of Fluoride ion binding using N-heteroaromatic based ligands.","authors":"Priyanka R Angarkhe, Satyajit Sahoo, Simran Singh Deo, Kripa S. R. Shankar, Manav Upadhyay, Kuldeep Mahiya, Jagnyaseni Tripathy, Rakesh K Behera, Swagat K Mohapatra","doi":"10.1039/d4dt02857k","DOIUrl":"https://doi.org/10.1039/d4dt02857k","url":null,"abstract":"8-hydroxyquinoline and imidazole, two important N-heteroaromatic systems, have a strong affinity towards various anions via their acidic OH or NH protons. Three receptor ligands, 5-(1H-benzo[d]imidazol-2-yl)quinolin-8-ol (1), 5-(benzo[d]thiazol-2-yl)quinolin-8-ol (2), and 4-(1H-benzo[d]imidazol-2-yl)benzene-1,3-diol (3) were synthesized and their fluoride (F–) ion binding properties were investigated. These ligands can selectively attach F– ion, and their respective F– complexes 1-TBAF, 2-TBAF, and 3-TBAF (TBAF = tetrabutylammonium fluoride) were characterized using single crystal X-ray analysis, NMR, UV-Vis, Hirshfeld surface (HS) analysis and computational studies Their solid-state structural analysis revealed that in each case, the F− ion is strongly bound within the receptor molecule scaffold by NH, OH, and aryl-CH hydrogen bonding interactions, and in the case of 1-TBAF and 3-TBAF, the F− binding is further strengthened by inclusion of water molecules, forming fluoride-water cluster complexes. 1H NMR exhibited the disappearance of NH and OH proton signals, upon adding TBAF, indicating the NH and OH protons as the primary site for F– ion coordination. UV-vis absorbance spectra studied their deep sensing limits towards F– ion. 1 and 2 both showed good responsive behavior starting from 0.5 µM of F– ion, though obvious changes occurred from F– concentration of 180 and 12 µM, respectively. HS analysis quantified the non-covalent interatomic contacts between the atoms and Fluoride, and found that 1-TBAF contributed a maximum of 19.2 % of all atoms···F contacts to the HS. Density functional theory studies were done on 1-TBAF, 2-TBAF, and 3-TBAF crystal systems, and the band structure and total density of states were evaluated on 1-TBAF–3-TBAF. The optical response evaluation of 2-TBAF was also investigated.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"19 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142760138","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}

引用次数: 0

A copper(II)-based metal–organic framework: electrochemical sensing of Cd(II) and Pb(II) and adsorption of organic dyes

IF 4 3区化学

Dalton Transactions Pub Date : 2024-12-03 DOI: 10.1039/d4dt02374a

Ting-Ting Guo, Bing-Long Hua, Zhuo-Yi Guo, Meng-Qi Zhang, Jin-Rong Wang, Yan-Yan An, Xiao-Nan Li, Juan-Zhi Yan

{"title":"A copper(II)-based metal–organic framework: electrochemical sensing of Cd(II) and Pb(II) and adsorption of organic dyes","authors":"Ting-Ting Guo, Bing-Long Hua, Zhuo-Yi Guo, Meng-Qi Zhang, Jin-Rong Wang, Yan-Yan An, Xiao-Nan Li, Juan-Zhi Yan","doi":"10.1039/d4dt02374a","DOIUrl":"https://doi.org/10.1039/d4dt02374a","url":null,"abstract":"A new inorganic–organic hybrid complex, namely [Cu3L2(DMF)2]·H2O (Cu-L), has been synthesized using a sulfur-rich ligand, 3,3′,3′′-(1,3,5-triazine-2,4,6-triyltrisulfanediyl)tripropanoic acid (H3L) and metal cations under hydrothermal conditions. The metal atoms are interconnected to form a paddle-wheel-like structure, which is ultimately linked to the ligands to create a three-dimensional architecture. Cu-L, employed to fabricate an electrochemical sensor denoted as Cu-L@GCE (glassy carbon electrode), is capable of simultaneously detecting Cd2+ and Pb2+ at approximately −0.82 V and −0.58 V (vs. Ag/AgCl reference), exhibiting high sensitivity and selectivity. Cu-L@GCE demonstrates broad linear detection ranges of 8–28 μM for Cd2+ and 2–14 μM for Pb2+, along with low limit of detection (LOD) values of 0.01363 μM and 0.00212 μM, respectively. Furthermore, Cu-L@GCE achieves LOD values of 0.00209 μM and 0.000034 μM when detecting both ions simultaneously. The constructed sensor successfully detects Cd2+ and Pb2+ in mineral water, tap water, and river water with satisfactory recoveries. Additionally, the adsorption performance for organic dyes has been studied in detail using Cu-L as an adsorbent. The results indicate good adsorption selectivity for methylene blue (MB) and neutral red (NR) compared to methyl orange (MO) and rhodamine B (RhB) molecules.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"29 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142760136","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}

引用次数: 0

Selective detoxification of a sulfur mustard simulant in air by a methylene blue functionalized metal-organic frameworks

IF 4 3区化学

Dalton Transactions Pub Date : 2024-12-03 DOI: 10.1039/d4dt02740j

Jinfeng Zhou, Qing Zhou, Haoxuan Sun, Xiangqian Li, Ao Chen, Junyao Chen, Chunjie Chu

{"title":"Selective detoxification of a sulfur mustard simulant in air by a methylene blue functionalized metal-organic frameworks","authors":"Jinfeng Zhou, Qing Zhou, Haoxuan Sun, Xiangqian Li, Ao Chen, Junyao Chen, Chunjie Chu","doi":"10.1039/d4dt02740j","DOIUrl":"https://doi.org/10.1039/d4dt02740j","url":null,"abstract":"Efficient degradation of a sulfur mustard is essential due to its extreme toxicity and widespread use as a chemical warfare agent. However, current degradation methods often lack selectivity and generate highly toxic by-products. Herein, we demonstrate an approach for the selective photodegradation of a sulfur mustard simulant using singlet oxygen (1O2) produced by methylene blue (MB)-modified a classical metal-organic framework UiO-66-(COOH)2 (abbreviated as UC), specifically the MB@UC composite. The composite was prepared via adsorption of MB on the surface of UC through strong electrostatic interactions. The MB@UC composite demonstrates high 1O2 generation, enabling selective detoxification of a sulfur mustard simulant (2-chloroethyl ethyl sulfide) to the relatively non-toxic sulfoxide with a half-life of 1.8 minutes at ambient conditions. Compared to traditional detoxification methods, the MB@UC composite offers superior selectivity, rapid degradation, and excellent recyclability, maintaining its performance over multiple cycles. This work presents a promising strategy for the development of advanced heterogeneous photosensitizers in the detoxification of chemical warfare agents.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"19 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142760749","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}

引用次数: 0

Dual-linker Ir-Zr-MOF Shows Improved Porosity to Enhance Aqueous Sulfide Photooxidation

IF 4 3区化学

Dalton Transactions Pub Date : 2024-12-03 DOI: 10.1039/d4dt02649g

Lian-Qiang Wei, Cheng-Li Li, Chun-Jian Wen, Hongfang Lai

引用次数: 0

C-H Bond Chlorination and Bromination Using Water Soluble Nickel (II) guanidine Complexes

IF 4 3区化学

Dalton Transactions Pub Date : 2024-12-03 DOI: 10.1039/d4dt02783c

Jaipriya Khatri, Vasanthapandiyan Mari, Aniruddha Sarkar, Naiwrit Karmodak, Basab Bijayi Dhar

引用次数: 0

Nanosheet arrays derived from ZIF-67 grown on three-dimensional frameworks for electrocatalytic oxygen evolution reaction

IF 4 3区化学

Dalton Transactions Pub Date : 2024-12-03 DOI: 10.1039/d4dt02635g

Jiangyan Dang, Jingjing Qiu, Xiaoying Zhang, Jingping Zhang

{"title":"Nanosheet arrays derived from ZIF-67 grown on three-dimensional frameworks for electrocatalytic oxygen evolution reaction","authors":"Jiangyan Dang, Jingjing Qiu, Xiaoying Zhang, Jingping Zhang","doi":"10.1039/d4dt02635g","DOIUrl":"https://doi.org/10.1039/d4dt02635g","url":null,"abstract":"Hydrogen energy has become one of the most promising substitutes for conventional fuels because of its high calorific value and green and renewable advantages. Among various hydrogen production strategies, the water splitting hydrogen production strategy stands out. Therefore, it is very important to develop efficient and cheap oxygen evolution reaction (OER) electrocatalyst for hydrogen production by electrolysis of water. In this work, nickel selenide grown on nickel foam (NF) with good electrical conductivity and excellent catalytic performance, i.e. NiSex/NF, was selected as the three-dimensional conducting substrate, and the active material ZIF-67 was successfully compounded on the conductive substrate by using the in-situ growth strategy. A series of self-supporting materials ZIF-67/NiSex/NF were obtained, which can be directly used as the working electrode for electrocatalysis OER. The self-supporting material ZIF-67/NiSex/NF-1 can achieve a low overpotential of 353 mV at a current density of 100 mA cm−2 with a small Tafel slope of 107 mV dec−1, and excellent stability for 55 hours of continuous OER at a current density of 50 mA cm−2 in an alkaline medium. Benefiting from the unique layered structure and the synergy between Co and Se optimizing the electronic structure, ZIF-67/NiSex/NF-1 directly using as the electrode shows exceptional OER catalytic performance at high current density.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"261 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142763223","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}

引用次数: 0

Pd-catalysed C–H bond functionalisation route to 1,2-dihydroferroceno[c]isoquinoline and its annellated derivatives and the reactivity of these compounds

IF 4 3区化学

Dalton Transactions Pub Date : 2024-12-03 DOI: 10.1039/d4dt03063j

Vera Varmuzova, Ivana Cisarova, Jiří Schulz, Květa Kalíková, Petr Štěpnička

{"title":"Pd-catalysed C–H bond functionalisation route to 1,2-dihydroferroceno[c]isoquinoline and its annellated derivatives and the reactivity of these compounds","authors":"Vera Varmuzova, Ivana Cisarova, Jiří Schulz, Květa Kalíková, Petr Štěpnička","doi":"10.1039/d4dt03063j","DOIUrl":"https://doi.org/10.1039/d4dt03063j","url":null,"abstract":"C–H bond functionalisation has developed into a powerful synthetic methodology that is applicable to a wide array of substrates, including organometallic compounds. In this study, racemic, planar-chiral 1,2-dihydroferroceno[c]isoquinoline and analogous helical compounds with one or two additional ortho-fused benzene rings were synthesised by palladium-catalysed C–H bond activation/cyclisation of N-[(bromoaryl)methyl]-N-(methylsulfonyl)aminoferrocenes. These starting materials readily accessible from FcNHSO2Me (Fc = ferrocenyl) and appropriate vicinal bromo-(bromomethyl)arenes. The racemic products were successfully enantioseparated using chiral chromatography. The representative compound, 1,2-dihydro-2-(methylsulfonyl)ferroceno[c]isoquinoline, was converted to the unstable ferroceno[c]isoquinoline and further used to prepare a heterobimetallic, Fe/Ru bis-metallocene complex via a reaction with [(η5-C5Me5)Ru(MeCN)3][PF6]. All compounds were characterised by spectroscopic methods (NMR, FTIR, and UV‒vis) and mass spectrometry; additionally, in most cases, crystal structures were determined by single-crystal X-ray diffraction analysis . Moreover, the representative compounds were examined by cyclic voltammetry, and the results were rationalised with the aid of DFT calculations.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"15 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142760139","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}

引用次数: 0

Evolution of Aluminum Aminophenolate Complexes in the Ring-Opening Polymerization of ε-Caprolactone: Electronic and Amino-Chelating Effects

IF 4 3区化学

Dalton Transactions Pub Date : 2024-12-03 DOI: 10.1039/d4dt02923b

Prasanna Kumar Ganta, Fei Huang, Taoufik Ben Halima, Rajiv Kamaraj, Yu Ting Chu, Hsi-Ching Tseng, Shangwu Ding, Kuo-Hui Wu, Hsuan-Ying Chen

{"title":"Evolution of Aluminum Aminophenolate Complexes in the Ring-Opening Polymerization of ε-Caprolactone: Electronic and Amino-Chelating Effects","authors":"Prasanna Kumar Ganta, Fei Huang, Taoufik Ben Halima, Rajiv Kamaraj, Yu Ting Chu, Hsi-Ching Tseng, Shangwu Ding, Kuo-Hui Wu, Hsuan-Ying Chen","doi":"10.1039/d4dt02923b","DOIUrl":"https://doi.org/10.1039/d4dt02923b","url":null,"abstract":"A series of aluminum complexes bearing phenolate (O-Al and O2-Al), biphenolate (OO-Al type), aminophenolate (ON-Al), aminobiphenolate (ONO-Al), bis(phenolato)bis(amine) (NNOO-Al), and Salan (ONNO-Al) type ligands were synthesized. ε-Caprolactone (CL) polymerization using these aluminum complexes as catalysts was investigated. The overall polymerization rates of Al catalysts with different ligands were presented in the following order (kobs value): ONBr-Al (0.124 min-1) ≥ OBr2-Al (0.121 min-1) > ONNOBr-Al (0.054 min-1) > NNOBr-Al (0.044 min-1) ≥ ONOBr-Al (0.043 min-1) > OBr-Al (0.033 min-1) > NNOOBr-Al (0.015 min-1) ≥ BuONNOBu-Al (0.001 min-1) = OOBr-Al (0.001 min-1). In addition, the Al complexes with electron-donating substituents on ligands exhibited higher catalytic activity than those with bromo substituents. Density functional theory (DFT) calculations revealed that dinuclear Al complex with two bridging methoxides had to rearrange to phenolate bridged dinuclear Al complex with terminal methoxides. This is due to the low initiating ability of two bridging benzyl alkoxides. Combining the polymerization data and DFT results, it was concluded that the electron-donating substituents on the phenolate ring and chelating amino group enhance the electron density of the Al center. This may prevent the formation of a low active dinuclear Al complex with two bridging alkoxides (initiators) or facilitate its structural rearrangement. OOMe-Al has been established as a powerful candidate with a high polymerization rate and exhibits well-controlled polymerization for synthesizing mPEG-b-PCL copolymer.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"8 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142760751","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}

引用次数: 0