Dalton Transactions最新文献_第4页

Bulkiness effect dependent photosalient behaviours of photoactive cadmium coordination polymers

IF 4 3区化学

Dalton Transactions Pub Date : 2025-03-28 DOI: 10.1039/d5dt00208g

Qing-Shu Dong, Ning Wang, David James Young, Fei-Long Hu, Yan Mi

{"title":"Bulkiness effect dependent photosalient behaviours of photoactive cadmium coordination polymers","authors":"Qing-Shu Dong, Ning Wang, David James Young, Fei-Long Hu, Yan Mi","doi":"10.1039/d5dt00208g","DOIUrl":"https://doi.org/10.1039/d5dt00208g","url":null,"abstract":"Three structurally related cadmium coordination polymers CP1–CP3 {[Cd3(Pebpeb)2(L1)6] (CP1), [Cd3(Pebpeb)2(L2)6] (CP2) and [Cd6(Pebpeb)4(L3)12]·HL3 (CP3)} were constructed from the photoactive alkene ligand Pebpeb (Pebpeb = 4,4′-((1E,1′E)-(5-(pyridin-3-ylethynyl)-1,3-phenylene)bis(ethene-2,1-diyl))dipyridine; HL1 = 3-chlorobenzoic acid; HL2 = 3-nitrobenzoic acid; HL3 = 3-isopropyl benzoic acid) and Cd(II) ions in the presence of different auxiliary carboxylic acids. Different conformations of the functional olefinic ligand Pebpeb were observed in CP1–CP3 despite their similar 1D chain motif. [2 + 2] Solid-state photodimerization occurred when crystals of CP1–CP3 were irradiated with UV light (365 nm) and each displayed different photosalient (PS) responses attributed to the different bulkiness of the auxiliary carboxylic acids employed. A simple photoactuating device was prepared using a CP1-PVA (PVA = Polyvinyl Alcohol) composite.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"72 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143723250","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

Enhanced Methods for the Undecachlorination of [HCB11H11]- and Syntheses of [XCB11¬Cl11]- from [HCB11¬Cl11]- (X = Cl, Br, I, NH2)

IF 4 3区化学

Dalton Transactions Pub Date : 2025-03-28 DOI: 10.1039/d4dt03033h

Jack P. Raker, Jovanny J. Contreras, S. Olivia Gunther, Oleg V. Ozerov

引用次数: 0

Enhancing the hydrogen evolution activity of diiron molecular electrocatalyst by modulating substituent effect of carbon nanotubes

IF 4 3区化学

Dalton Transactions Pub Date : 2025-03-28 DOI: 10.1039/d5dt00138b

Pei-Hua Zhao, Shao-Jie Wang, Fan-Zeng Wei, Xue Su, Hui Gao

{"title":"Enhancing the hydrogen evolution activity of diiron molecular electrocatalyst by modulating substituent effect of carbon nanotubes","authors":"Pei-Hua Zhao, Shao-Jie Wang, Fan-Zeng Wei, Xue Su, Hui Gao","doi":"10.1039/d5dt00138b","DOIUrl":"https://doi.org/10.1039/d5dt00138b","url":null,"abstract":"Designing molecular catalysts to enhance hydrogen evolution activity presents both great significance and challenges. In hydrogenases, the redox group (i.e., [4Fe4S] subcluster) near catalytic active center (i.e., [2Fe2S] subcluster) plays a crucial role in modulating the enzyme's activity. Inspired by this biological strategy, three carbon-nanotube-supported diiron dithiolato hybrids, which are labeled as CNT-X-ADT (X = N, C, O), were designed. The activity of diiron catalytic center was regulated through side chain substituents (i.e., substituent effects) of CNT. Notably, a bioinspired diiron molecular compound {(μ-SCH₂)₂N(CH₂CO₂C₆H₄CHO-p)}Fe₂(CO)₆ (1), which was used to mimic diiron catalytic active center of hydrogenase enzyme, was first synthesized and then covalently attached to carbon nanotubes to form three target hybrids CNT-X-ADT (X = N, C, O). The side chain substituents, designed to mimic the activity control group, were linked to CNTs through an amination reaction. Significantly, the hydrogen evolution reaction (HER) properties of the CNT-X-ADT hybrids were systematically investigated and compared using various electrochemical techniques. Compared with CNT-C-ADT that lacks side chain regulatory ability, the average turnover frequency (TOFH₂) of CNT-N-ADT is nearly twice and gets 0.175 s⁻¹ after 5-h electrolysis, and the corresponding turnover number (TONH₂) for H₂ generation reaches 3.1 x 10³. In contrast, the CNT-O-ADT hybrid, due to its electron-withdrawing alkoxy side chain, reduces the electron density of the catalytic center, resulting in the poorest HER performance. Overall, this activity modulation by different side-chain substituents holds great significance for the development and design of metal molecular catalysts.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"57 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143723378","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

Synthesis of Pyridine-Functionalized Cyclic Aromatic Triamide and Formation of Copper Coordination Polymeric Complexes

IF 4 3区化学

Dalton Transactions Pub Date : 2025-03-28 DOI: 10.1039/d5dt00369e

Koji Takagi, Taiga Shirai, Daiki Miyamoto, Takuya Nakashima, Tomoyuki Ikai, Yutaka Ie, Takanori Fukushima

引用次数: 0

Copper(II) complexes with (E)–4–(2–(pyridin–2–ylmethylene)hydrazinyl)quinazoline and non–steroidal anti–inflammatory drugs: Structure and biological evaluation

IF 4 3区化学

Dalton Transactions Pub Date : 2025-03-28 DOI: 10.1039/d5dt00435g

Chrisoula Kakoulidou, Antonios Hatzidimitriou, George L Psomas

{"title":"Copper(II) complexes with (E)–4–(2–(pyridin–2–ylmethylene)hydrazinyl)quinazoline and non–steroidal anti–inflammatory drugs: Structure and biological evaluation","authors":"Chrisoula Kakoulidou, Antonios Hatzidimitriou, George L Psomas","doi":"10.1039/d5dt00435g","DOIUrl":"https://doi.org/10.1039/d5dt00435g","url":null,"abstract":"Four novel Cu(II) mixed−ligands complexes containing the quinazoline (E)−4−(2−((pyridin−2−yl)methylene)hydrazinyl)quinazoline (HL) or its methoxylated derivative (HL1) and a non−steroidal anti−inflammatory drug (mefenamic acid, flufenamic acid, diflunisal or diclofenac) as ligands were synthesized and characterized with single−crystal X−ray crystallography. In these complexes, the quinazolines are as tridentate or bridging tetradentate ligands. The studied biological properties of the complexes included the interaction with calf−thymus DNA, the ability to cleave supercoiled circular pBR322 plasmid DNA in the absence or presence of various irradiation wavelengths, the ability to reduce H2O2 or to scavenge free radicals such as 1,1−diphenyl−picrylhydrazyl and 2,2'−azinobis−(3−ethylbenzothiazoline−6−sulfonic acid), and the affinity for bovine serum albumin. The compounds can bind tightly to calf−thymus DNA via intercalation, and most of them induce notable (photo)cleavage of plasmid DNA. They can also bind tightly and reversibly to the albumin and exhibit moderate−to−significant activity towards 2,2'−azinobis−(3−ethylbenzothiazoline−6−sulfonic acid) radicals and H2O2.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"57 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143723248","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

Stepwise transformation of a redox-active tetradentate ONNO ligand in the coordination sphere of tin(IV)

IF 4 3区化学

Dalton Transactions Pub Date : 2025-03-27 DOI: 10.1039/d5dt00430f

Irina N Meshcheryakova, Anton Cherkasov, Maxim V. Arsenyev, Rinat R. Aysin, Alexey A Belikov, Artem Bogomyakov, Natalia A. Protasenko, Tatiana Kocherova, Svetlana V. Baryshnikova, Alexandr Vladimirovich Piskunov

{"title":"Stepwise transformation of a redox-active tetradentate ONNO ligand in the coordination sphere of tin(IV)","authors":"Irina N Meshcheryakova, Anton Cherkasov, Maxim V. Arsenyev, Rinat R. Aysin, Alexey A Belikov, Artem Bogomyakov, Natalia A. Protasenko, Tatiana Kocherova, Svetlana V. Baryshnikova, Alexandr Vladimirovich Piskunov","doi":"10.1039/d5dt00430f","DOIUrl":"https://doi.org/10.1039/d5dt00430f","url":null,"abstract":"New diorganotin(IV) complexes based on a redox-active tetradentate ONNO ligand, namely N,N'-bis(3,5-di-tert-butyl-2-hydroxyphenyl)-1,2-phenylenediamine (LH4) were synthesized. A methodology for the stepwise oxidation of tin(IV)-ONNO derivatives with a stoichiometric amount of p-benzoquinone was developed. This allowed the preparation of tin(IV) complexes containing the ligand in the tetraanionic doubly deprotonated form, in the dianionic state, and to carry out a controlled intraligand cyclization. It has been found that the diorganotin(IV) compounds with the dianionic form of the ONNO ligand have a ground singlet spin state, but an increase in temperature leads to a partial populating of the triplet state and a transition from the diamagnetic form of these complexes to the paramagnetic biradical ones. The UV-vis-NIR spectrum of L2-SnPh2 shows an intense absorption band in the range of 600 - 1400 nm, corresponding to the intraligand charge transfer (ILCT). The coordination ability of the solvent strongly influences the position of this solvatochromic band. Cyclic voltammetry revealed that this compound undergoes two sequential reversible single-electron oxidations and two sequential reversible single-electron reductions. This cyclic voltammetry remains unchanged even after 100 cycles have been performed.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"47 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143713420","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

Combination of 5-Amino-4-nitro-1,2-dihydro-3H-pyrazol-3-one and Azine Frameworks for Insensitive Heat-resistant Energetic Materials

IF 4 3区化学

Dalton Transactions Pub Date : 2025-03-27 DOI: 10.1039/d5dt00488h

Xiue Jiang, Ruihui Wang, Mingren Fan, Siwei Song, Yi Wang, Qinghua Zhang

引用次数: 0

Stabilization of lead-free bulk CsSnI3 perovskite thermoelectrics via incorporating of TiS3 nanoribbon clusters

IF 4 3区化学

Dalton Transactions Pub Date : 2025-03-27 DOI: 10.1039/d5dt00326a

Alexandra Ivanova, Lev Luchnikov, Dmitry S. Muratov, Margarita Golikova, Danila Saranin, Aleksandra Khanina, Pavel Gostishchev, Vladimir V Khovaylo

{"title":"Stabilization of lead-free bulk CsSnI3 perovskite thermoelectrics via incorporating of TiS3 nanoribbon clusters","authors":"Alexandra Ivanova, Lev Luchnikov, Dmitry S. Muratov, Margarita Golikova, Danila Saranin, Aleksandra Khanina, Pavel Gostishchev, Vladimir V Khovaylo","doi":"10.1039/d5dt00326a","DOIUrl":"https://doi.org/10.1039/d5dt00326a","url":null,"abstract":"The intense research for efficient low-temperature thermoelectric materials motivates the exploration of innovative compounds and composite systems. This study examines the effects of integrating low-dimensional titanium trisulfide (TiS3) into bulk tin-based halide perovskites (CsSnI3) for use in thermoelectric applications. The incorporation of small amounts of two-dimensional titanium trisulfide (TiS3) into CsSnI3 not only significantly enhanced the structural stability of the composite material and suppressed oxidation processes but also ensured that its initial electri-cal properties, including conductivity and the Seebeck coefficient, remained stable for at least 24 hours – unlike the pristine CsSnI3 sample. These findings emphasize the potential of low-dimensional TiS3 as an effective additive for stabilizing the thermoelectric performance of CsSnI3-based materials over time.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"1 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143713421","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

Investigating the Stable Structures of Yttrium Oxide Clusters: Yn Clusters as Promising Candidates for O₂ Dissociation

IF 4 3区化学

Dalton Transactions Pub Date : 2025-03-27 DOI: 10.1039/d5dt00357a

Varun Vinayak Deshpande, Debashis Bandyopadhyay, Vaibhav Chauhan, Gayatri Kumari, Soumen Bhattacharyya

{"title":"Investigating the Stable Structures of Yttrium Oxide Clusters: Yn Clusters as Promising Candidates for O₂ Dissociation","authors":"Varun Vinayak Deshpande, Debashis Bandyopadhyay, Vaibhav Chauhan, Gayatri Kumari, Soumen Bhattacharyya","doi":"10.1039/d5dt00357a","DOIUrl":"https://doi.org/10.1039/d5dt00357a","url":null,"abstract":"The study presents threshold photoionization (PI) spectra for a series of yttrium oxide clusters (YnOm, m = 2–8, n = 2–4) in the photon energy range of 192 to 300 nm (6.46 to 4.13 eV). Density Functional Theory (DFT) is employed to explore stable structures of these clusters. For YnO2 clusters, experimental PI spectra are compared with calculated spectra for the lowest-energy and near-lowest-energy structural isomers. Stable structures contributing to the experimental PI spectra are identified. Experimentally corrected adiabatic ionization energies for YmO2 clusters are determined. A newly identified lowest-energy structure for Y₂O₂ differs from previous literature, while larger clusters show better agreement, primarily varying in oxygen binding sites. Molecular oxygen-absorbed configurations of yttrium oxide clusters are generally unstable or energetically unfavorable, with O2 activation occurring via charge transfer from yttrium to oxygen. Climbing Image Nudged Elastic Band (CI-NEB) calculations indicate that YnO₂ forms in the ground state when an O₂ molecule is absorbed onto low- or under-coordinated sites—such as corners or edges—of Yn clusters. This process involves the dissociation of the O-O bond, followed by the adsorption of individual O atoms at different sites on the Yn clusters. Analysis of the total density of states (TDOS) and partial density of states (PDOS) reveals an increased orbital density near the Fermi level, indicating a strong reaction affinity between Y and O atoms.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"67 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143713419","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

An iron and lanthanide heterobimetallic coordination polymer derived electrocatalyst showing Enhanced activity and stability for oxygen reduction reaction

IF 4 3区化学

Dalton Transactions Pub Date : 2025-03-27 DOI: 10.1039/d5dt00376h

Xin Liu, Pengpeng Guo, Kun-Zu Yang, Yong-Zhi Su, Chao Xu, Jin-Gang Liu

{"title":"An iron and lanthanide heterobimetallic coordination polymer derived electrocatalyst showing Enhanced activity and stability for oxygen reduction reaction","authors":"Xin Liu, Pengpeng Guo, Kun-Zu Yang, Yong-Zhi Su, Chao Xu, Jin-Gang Liu","doi":"10.1039/d5dt00376h","DOIUrl":"https://doi.org/10.1039/d5dt00376h","url":null,"abstract":"It is desirable to develop noble-metal-free electrocatalysts with both excellent activity and stability for the oxygen reduction reaction (ORR) in clean energy conversion devices. Herein, we report an Fe, La co-doped FeLaNC electrocatalyst obtained by pyrolyzing a heterobimetallic coordination polymer [La2L3(CH3OH)4]∞ loaded on carbonized ZIF-8, which was synthesized from 1,1'-ferrocenedicarboxylic acid (H2L1) and lanthanide salt. The FeLaNC catalyst exhibited higher ORR activity with a half-wave potential (E1/2) of 0.874 V (vs. RHE) than the control catalyst FeNC (E1/2 = 0.864 V) without La dopant as well as commercial 20 wt% Pt/C (E1/2 = 0.862 V) in 0.1 M KOH solution, and FeLaNC displayed excellent stability with negligible half-wave potential decay after 15,000 potential cycles. When FeLaNC was applied as cathodic electrocatalyst in Zn-air batteries (ZABs), the open circuit voltage (OCV) and maximum power density (Pmax) of the FeLaNC-based ZABs achieved 1.46 V and 130 mW cm-2 , respectively, which were significantly higher than those of Pt/C (OCP = 1.41 V and Pmax = 120 mW cm-2). The introducing of La3+ into Fe-N-C catalysts not only promoted ORR activity by regulating the electron density of Fe-Nx sites but also enhanced the stability by eliminating the harmful radicals, which afforded an effective approach to prepare high-performance and stable electrocatalysts to be applied in energy conversion devices.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"57 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143713422","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