Dalton Transactions最新文献_第8页

Probing the Significance of Phenylethyl Ammonium Doping in Cs3Bi2Br9 Halide Perovskite Nanosheets: A Structural and Optical Perspective

IF 4 3区化学

Dalton Transactions Pub Date : 2025-04-08 DOI: 10.1039/d5dt00325c

Fency Sunny, Priyakumari Chakkingal Parambil, Nandakumar Kalarikkal, K. B. Subila

{"title":"Probing the Significance of Phenylethyl Ammonium Doping in Cs3Bi2Br9 Halide Perovskite Nanosheets: A Structural and Optical Perspective","authors":"Fency Sunny, Priyakumari Chakkingal Parambil, Nandakumar Kalarikkal, K. B. Subila","doi":"10.1039/d5dt00325c","DOIUrl":"https://doi.org/10.1039/d5dt00325c","url":null,"abstract":"Lead free halide perovskites have been explored ardently for optoelectronic applications. Organic-Inorganic hybrid halide perovskites have shown promise with novel optical properties, bandgap tuning and improved carrier dynamics while introducing a quantum well structure. Herein, we have incorporated phenylethyl ammonium (PEA), an organic cation in cesium bismuth bromide (CBB) to enhance the multi-quantum well structure of CBB and form organic-inorganic hybrid nanosheets of PEA doped cesium bismuth bromide (CBB). The optimum addition of dopant led to the formation of stable layered PEA: CBB hybrid nanosheets, evidenced from XRD and HRTEM analysis.The possible stable structure of the hybrid nanosheets was elucidated via DFT calculations. This revealed a minimum energy structure with PEA coordinated in a horizontal configuration in-between inorganic slabs of CBB. PEA incorporation leads to the formation of new electronic states instigating longer tails in luminescence spectrum and variation in carrier lifetime. Third order non-linear optical characterization of the pure and hybrid particles revealed the multi-quantum-well structure and additional trap states brought about by PEA incorporation increases the two-photon absorption coefficient and decreases the optical limiting threshold of CBB. The present study indicates conceivable relevance of lead-free bismuth based halide perovskites and its variants in optical limiting applications.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"59 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143797888","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

Design and Catalytic Application of Ag-Au Nanoprisms: Enhancing A3 Coupling Efficiency with Minimal Gold Concentration

IF 4 3区化学

Dalton Transactions Pub Date : 2025-04-08 DOI: 10.1039/d5dt00415b

Mohammad Gholinejad, Mahboobe Eskandari, José Sansano

引用次数: 0

Correction: Novel single component tri-rare-earth emitting MOF for warm white light LEDs

IF 4 3区化学

Dalton Transactions Pub Date : 2025-04-08 DOI: 10.1039/d5dt90076j

Hui Li, Hong-Bin Liu, Xiao-Min Tao, Jian Su, Ping-Fan Ning, Xiu-Fang Xu, Yu Zhou, Wen Gu, Xin Liu

引用次数: 0

Reversible Fluorination in Brownmillerite SrCoO2.5 by MgF2 annealing

IF 4 3区化学

Dalton Transactions Pub Date : 2025-04-08 DOI: 10.1039/d5dt00262a

Yongxiang Ma, Yuanmin Zhu, Yihao Yang, Qi Liu, Sixia Hu, Songbai Hu, Lang Chen

引用次数: 0

Chasing isolable late d-block metal nitrenes and imidyls

IF 4 3区化学

Dalton Transactions Pub Date : 2025-04-08 DOI: 10.1039/d5dt00110b

C. Gunnar Werncke

引用次数: 0

Regiospecific arene C-H self-hydroxylation in pentadentate ligand via activation of atmospheric dioxygen utilizing Co(II) precursors under ambient reaction conditions: Experimental and DFT optimized studies

IF 4 3区化学

Dalton Transactions Pub Date : 2025-04-08 DOI: 10.1039/d4dt03244f

Prashant Kukreti, Rahul Chauhan, Yutaka Hitomi, Kaushik Ghosh

{"title":"Regiospecific arene C-H self-hydroxylation in pentadentate ligand via activation of atmospheric dioxygen utilizing Co(II) precursors under ambient reaction conditions: Experimental and DFT optimized studies","authors":"Prashant Kukreti, Rahul Chauhan, Yutaka Hitomi, Kaushik Ghosh","doi":"10.1039/d4dt03244f","DOIUrl":"https://doi.org/10.1039/d4dt03244f","url":null,"abstract":"The activation of dioxygen on redox-active metal centres is an important area of study in bioinorganic chemistry. One of the key challenges in this field is the activation of atmospheric dioxygen under ambient conditions. In this study, we report the ligand-induced activation of atmospheric dioxygen using cobalt(II) precursors and the oxygenation of arene C-H bonds within a pentadentate ligand under ambient conditions. Herein, a novel pentadentate ligand BPMAP-H = (E)-2-(bis(pyridin-2-ylmethyl)amino)-N-(2-(phenyldiazenyl)phenyl)acetamide) having carboxamide and azo donor groups was synthesized and utilized for dioxygen activation. A number of cobalt(II), precursors with BPMAP-H provide [Co(III)BPMAP-O]ClO4 complex Co-1 with oxidation at the metal centre and phenyl ring oxygenation in ligand backbone. Both the ligand BPMAP-H and complex Co-1 were well characterized by UV-visible spectroscopy, IR spectroscopy, 1H NMR, 13C NMR, 13C DEPT-135, HRMS, and single-crystal XRD. Several controlled experiments and DFT calculations were performed for mechanistic investigation and the in-situ formed cobalt(III)-superoxide was characterized as a key intermediate with the help of EPR studies.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"72 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143797889","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

Luminescence quenching of pyrene-labeled fluorescent dendrons by surface anchoring of ruthenium nanoparticles

IF 4 3区化学

Dalton Transactions Pub Date : 2025-04-07 DOI: 10.1039/d5dt00192g

Roberto González Gómez, Mireille Vonlanthen, Christian Bijani, Catherine Amiens, Ernesto Rivera, Karine Philippot

{"title":"Luminescence quenching of pyrene-labeled fluorescent dendrons by surface anchoring of ruthenium nanoparticles","authors":"Roberto González Gómez, Mireille Vonlanthen, Christian Bijani, Catherine Amiens, Ernesto Rivera, Karine Philippot","doi":"10.1039/d5dt00192g","DOIUrl":"https://doi.org/10.1039/d5dt00192g","url":null,"abstract":"Hybrid nanostructures comprising ruthenium nanoparticles (Ru NPs) and Fréchet type dendrons of first (G1) and second (G2) generations bearing two and four pyrene units, respectively, and a carboxylic acid group as an anchoring function, have been prepared by taking advantage of the organometallic approach and ligand exchange. Their optical properties have been studied by absorption and fluorescence spectroscopies and compared with those of counterparts prepared in the same conditions but with pyreneacetic acid and pyrenebutyric acid as fluorophores. Pyrene-labelled Fréchet type dendrons display more pyrene units at a longer distance from the Ru surface than pyreneacetic acid and pyrenebutyric acid fluorophores. Interestingly, and unlike pyreneacetic acid- and pyrenebutyric acid-derived nanohybrids, the dendron-functionalized Ru NPs exhibit significant to efficient quenching of the pyrene fluorescence (67% for G2 and 94% for G1 with respect to the free dendrons). The quenching effect of the Ru metallic cores onto the fluorophore units opens up new prospects for the use of such nanohybrids as antennas for photocatalytic applications.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"87 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143797936","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

Ferrocene Conjugated Os(II) Complex for Photo-catalytic Cancer Therapy of Triple-negative Breast Cancer Cells

IF 4 3区化学

Dalton Transactions Pub Date : 2025-04-07 DOI: 10.1039/d5dt00515a

Apurba Mandal, Virendra Singh, Silda Peters, Arif Ali Mandal, Tumpa Sadhukhan, Biplob Koch, Samya Banerjee

引用次数: 0

Facile preparation of carbon, nitrogen co-doped NiMoO4·MoO2 heterostructures derived from polyoxometalate with ultrahigh energy density for zinc-ion capacitors

IF 4 3区化学

Dalton Transactions Pub Date : 2025-04-07 DOI: 10.1039/d5dt00505a

Yining Zhang, Yangyang Wen, Xiaoying Liu, Yingnan Zhang, Xiaoxue Jia, Wang Li, Hongxuan Tang, Hongfei Dou, Yannan Li, Yan Zhao

{"title":"Facile preparation of carbon, nitrogen co-doped NiMoO4·MoO2 heterostructures derived from polyoxometalate with ultrahigh energy density for zinc-ion capacitors","authors":"Yining Zhang, Yangyang Wen, Xiaoying Liu, Yingnan Zhang, Xiaoxue Jia, Wang Li, Hongxuan Tang, Hongfei Dou, Yannan Li, Yan Zhao","doi":"10.1039/d5dt00505a","DOIUrl":"https://doi.org/10.1039/d5dt00505a","url":null,"abstract":"Aqueous zinc ion hybrid supercapacitors (ZHSC) have attracted great attention in recent years. However, their electrochemical performance is prohibited by the low energy density and poor cycling stability, mainly due to the difficulty in effectively activating the ionic and electronic conductivity of the cathode material. In this work, we innovatively propose a low-cost, precisely customized strategy for doping trace amounts of carbon and nitrogen elements into metal oxides to improve electrochemical performance. The carbon and nitrogen-doped NiMoO4·MoO2/NC heterostructures derived from polyoxometalates maintain high electrochemical activity while achieving high ionic conductivity. Trace amounts of carbon and nitrogen elements can significantly improve electronic conductivity and charge storage capacity. Due to the synergistic contribution, the composite structure with multi-redox sites exhibits a high specific capacity value of 364.96 F/g at 1 A/g in 1 M ZnSO4. A ZHSC was assembled with NiMoO4·MoO2/NC as the cathode and zinc sheet as the anode. After 10000 cycles, the capacitance retention rate still reached over 80 %. In addition, its energy density and power density can also reach 102 Wh Kg-1@4140 W Kg-1, which is higher than that of MoO2-based traditional supercapacitors. This strategy fully demonstrates the great practicality and development prospects of polyoxometalate derivatives for ZHSC.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"35 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143789985","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

Fe-zeolites synthesis from Amazonian kaolinite for methylene blue removal: adsorption and photocatalytic activity

IF 4 3区化学

Dalton Transactions Pub Date : 2025-04-07 DOI: 10.1039/d5dt00439j

Victor Augusto Araújo de Freitas, Débora Souza Pinheiro, Camila Ferreira Peixoto, Luiz Oliveira, Paulo Rogério da Costa Couceiro

{"title":"Fe-zeolites synthesis from Amazonian kaolinite for methylene blue removal: adsorption and photocatalytic activity","authors":"Victor Augusto Araújo de Freitas, Débora Souza Pinheiro, Camila Ferreira Peixoto, Luiz Oliveira, Paulo Rogério da Costa Couceiro","doi":"10.1039/d5dt00439j","DOIUrl":"https://doi.org/10.1039/d5dt00439j","url":null,"abstract":"Zeolites exhibit high adsorption capacities for organic substrates and catalytic activity owing to their unique structural features, such as uniform pore sizes and Lewis acidity. However, their inherent UV-Vis transparency (λ > 240 nm) limits their efficacy as photocatalysts. This limitation can be addressed by incorporating transition metals into their framework or encapsulating semiconductors within their porous structures. In this study, Fe-zeolites were synthesized through alkaline fusion of natural Amazonian kaolinite, followed by hydrothermal treatment with varying Fe³⁺ loadings from Fe(NO₃)₃. In the absence of Fe(NO₃)₃, LTA zeolite was obtained under these experimental conditions. However, the introduction of Fe(NO₃)₃ led to the formation of cancrinite (CAN) zeolite, suggesting that nitrate anions acted as a structure-directing agent. XRD and Mössbauer spectroscopy confirmed the presence of Fe-doped cancrinite and dispersed maghemite within FeZEO-3 and FeZEO-5. Methylene blue adsorption onto Fe-zeolites was best described by the Langmuir isotherm model and followed pseudo-second-order kinetics. An increase in iron content from 0 to 5% (w/w) led to enhanced photoactivity, as evidenced by a decrease in band gap energy from 3.21 eV to 2.93 eV and finally to 2.53 eV. This improved photoactivity was further supported by the observation of hydroxylated methylene blue intermediates during the photocatalysis process as the material FeZEO-5 removed up to 90% of the dye.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"313 1-2 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143789983","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