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Dimensional Engineering in Chiral Layered Hybrid Perovskites for High-Anisotropy Self-powered Circularly Polarized Light Detection 用于高各向异性自供电圆偏振光探测的手性层状杂化钙钛矿的尺寸工程
IF 8.4 1区 化学
Chemical Science Pub Date : 2026-04-24 DOI: 10.1039/d6sc00286b
Wan Luo, Qianxi Wang, Xiaoqi Li, Fen Zhang, Yan Fu, Yikun Fu, Xiaoyu Zhang, Guifu Zhang, Xitao Liu, Junhua Luo
{"title":"Dimensional Engineering in Chiral Layered Hybrid Perovskites for High-Anisotropy Self-powered Circularly Polarized Light Detection","authors":"Wan Luo, Qianxi Wang, Xiaoqi Li, Fen Zhang, Yan Fu, Yikun Fu, Xiaoyu Zhang, Guifu Zhang, Xitao Liu, Junhua Luo","doi":"10.1039/d6sc00286b","DOIUrl":"https://doi.org/10.1039/d6sc00286b","url":null,"abstract":"Chiral perovskites have emerged as a highly promising family of materials for circularly polarized light (CPL) detection, owing to their unique combination of structural chirality and remarkable optoelectronic performance. However, breaking the linear scaling law between chiroptical activity and intrinsic conductivity with dimensionality remains a substantial challenge toward high-performance CPL detection. Herein, through dimensional engineering involving the incorporation of a large cage cation and a chiral bifunctional bulky cation, a series of chiral layered hybrid perovskites (R/S-BrBA)2EAn-1PbnBr3n+1 (n = 1 to 3, R/S-BrBA+ is 3-amino-1-bromobutanium and EA+ is ethylammonium) has been successfully constructed. By incorporating oversized EA+ within the layered perovskite lattices, two new pairs of mutilayered hybrid perovskites (R/S-BrBA)2EAPb2Br7 (2R/S) and (R/S-BrBA)2EA2Pb3Br10 (3R/S) have been synthesized, which exhibit remarkable semiconducting properties including small optical absorption edges (2.79 and 2.69 eV) and high photoconductive on/off ratio (> 102 and 103). Strikingly, cooperatively driven by the large cation induced lattice expansion and bifunctional cation introduced halogen⋯halogen Interaction increases the chirality transfer from the organic to inorganic sublattices, and the chiroptical activity with an asymmetric factor was enhanced by 5.7 times as the n value increases, breaking the linear scaling law. Benefiting from the dimensional engineering, exceptional self-powered CPL detection with an anisotropy factor (gIph) of up to 0.278 has been achieved in photoelectric device fabricated with 3R single crystals. This study provides a pathway for the development of chiral perovskites that integrate high chiroptical activity and remarkable intrinsic conductivity, thereby enabling high-anisotropy self-powered CPL detection.","PeriodicalId":9909,"journal":{"name":"Chemical Science","volume":"71 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2026-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147753520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Stereoselective hydrogen isotope exchange on nicotinamide cofactors through flavoenzyme microscopic reversibility 通过黄酶微观可逆性对烟酰胺辅因子进行立体选择性氢同位素交换
IF 8.4 1区 化学
Chemical Science Pub Date : 2026-04-24 DOI: 10.1039/d6sc01003b
Christopher Otun, Michael Yuen, Harry Spacey, Carlo Bawn, Matthew Cliff, Francesco Falcioni, Ryan Ashley Ashley Bragg, Charles S Elmore, Sam Hay, Jack Rowbotham
{"title":"Stereoselective hydrogen isotope exchange on nicotinamide cofactors through flavoenzyme microscopic reversibility","authors":"Christopher Otun, Michael Yuen, Harry Spacey, Carlo Bawn, Matthew Cliff, Francesco Falcioni, Ryan Ashley Ashley Bragg, Charles S Elmore, Sam Hay, Jack Rowbotham","doi":"10.1039/d6sc01003b","DOIUrl":"https://doi.org/10.1039/d6sc01003b","url":null,"abstract":"We describe a panel of flavoenzymes with the ability to catalyse stereoselective hydrogen isotope exchange (HIE) between <small><sup>2</sup></small>H<small><sub>2</sub></small>O (D<small><sub>2</sub></small>O) and reduced nicotinamide cofactors, enabling a simple and redox-neutral route to deuterated NAD(P)H isotopomers. In screening the FMN- and FAD-dependent enzymes, which have diverse native functions, we identified catalysts (many of which are commercially available) that selectively yield the full suite of [4-<small><sup>2</sup></small>H]-NAD(P)H stereoisotopomers in a single step. In combining stereo-complementary enzymes, we also identify simple one-pot routes to dideuterated [4-<small><sup>2</sup></small>H<small><sub>2</sub></small>]-NAD(P)H. The biocatalytic methods provide near-quantitative <small><sup>2</sup></small>H-incorporation for both NADPH and NADH under mild conditions, using readily available <small><sup>2</sup></small>H<small><sub>2</sub></small>O as the isotope source. The observed activity indicates a reversible flavoenzyme hydride-transfer cycle, reliant on hydrogen/deuterium exchange on the transiently reduced flavin cofactors. We provide computational analysis to rationalise the stereochemical outcomes of the screened reactions. Finally, preparative-scale syntheses are described that deliver isolated deuterated cofactors in excellent yield and isotopic purity. We envisage this easily implemented procedure will simplify access to these important biochemical compounds for mechanistic studies, and may open up wider <small><sup>2</sup></small>H<small><sub>2</sub></small>O-driven biocatalytic deuteration reactions.","PeriodicalId":9909,"journal":{"name":"Chemical Science","volume":"23 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2026-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147739423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Rational Design of Pigment-Polymer Antenna Complexes 色素-聚合物天线配合物的合理设计
IF 8.4 1区 化学
Chemical Science Pub Date : 2026-04-24 DOI: 10.1039/d6sc01202g
Edwin C. Johnson, Demetris Bates, Tingxiang Yang, Kasimir P Gregory, Jodie West, Deborah Hammond, James Peter Pidgeon, Jenny Clark, Nicholas H. Williams, Christopher Neil Hunter, Steven P Armes, Graham J. Leggett
{"title":"Rational Design of Pigment-Polymer Antenna Complexes","authors":"Edwin C. Johnson, Demetris Bates, Tingxiang Yang, Kasimir P Gregory, Jodie West, Deborah Hammond, James Peter Pidgeon, Jenny Clark, Nicholas H. Williams, Christopher Neil Hunter, Steven P Armes, Graham J. Leggett","doi":"10.1039/d6sc01202g","DOIUrl":"https://doi.org/10.1039/d6sc01202g","url":null,"abstract":"We report the synthesis of biomimetic programmable pigment-polymer antenna complexes (PPACs) by using reductive amination to bind amine-functional dyes to surface-grafted aldehyde-functional PAGEO5MA chains grown from planar substrates by atom-transfer radical polymerization. The fraction of dye-conjugated repeat units can approach unity under optimized conditions. Dye binding kinetics are strongly influenced by steric factors and can be controlled by varying the polymer grafting density, the dye size and the nucleophilicity of its amine group. Absorption and fluorescence spectra of PPACs produced by conjugating Nile Red ethylamine (NRet) to PAGEO5MA brushes are sensitive to the dielectric environment within the layer. At low dye concentrations, the mean fluorescence lifetime tmean of the chromophore was 1.3 ± 0.1 ns, similar to that obtained for a dilute methanolic solution of NRet (1.17 ± 0.01 ns). tmean decreases with increasing dye conjugation, due to increased dye-dye interactions. However, tmean is higher for NRet conjugated to PAGEO5MA than for NR in a spin-cast film of the dye in poly(methyl methacrylate) at the same concentration, indicating that conjugation to the polymer scaffold minimizes dye aggregation. PPACs offer a potentially versatile route to the production of programmable photonic materials, with efficient conjugation chemistry enabling precise control over dye-dye interactions.","PeriodicalId":9909,"journal":{"name":"Chemical Science","volume":"19 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2026-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147736128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
From Perovskite Top Interfaces to Metal Contacts: Stability-Driven Design for Tandem-Compatible Inverted Solar Cells 从钙钛矿顶部界面到金属触点:串联兼容倒置太阳能电池的稳定性驱动设计
IF 8.4 1区 化学
Chemical Science Pub Date : 2026-04-24 DOI: 10.1039/d5sc10164f
Sangmi Park, Jong Bin Park, Jung Min Ha, Hye Seung Seung Kim, Myoung Hoon Song, Han Young Woo
{"title":"From Perovskite Top Interfaces to Metal Contacts: Stability-Driven Design for Tandem-Compatible Inverted Solar Cells","authors":"Sangmi Park, Jong Bin Park, Jung Min Ha, Hye Seung Seung Kim, Myoung Hoon Song, Han Young Woo","doi":"10.1039/d5sc10164f","DOIUrl":"https://doi.org/10.1039/d5sc10164f","url":null,"abstract":"Inverted perovskite solar cells (PeSCs) have attracted growing attention due to their low-temperature processability, reduced hysteresis, and strong compatibility with flexible and tandem device architectures, and have now surpassed conventional devices in terms of both power conversion efficiency and operational stability. Despite these advantages, their long-term operational stability remains critically constrained by the upper device stack, spanning from the perovskite surface through the electron-transporting layer (ETL) to the metal cathode. This review systematically analyzes the dominant origins of instability at these top interfaces in inverted PeSCs and organizes recent progress into three key design directions: (i) perovskite/ETL interface engineering using organic and inorganic modifiers, low-dimensional perovskite capping layers, and thermally conductive interlayers; (ii) C<small><sub>60</sub></small> replacements or non-fullerene ETLs that integrate defect passivation, interfacial dipole tuning, ion management, and aggregation-resistant morphologies; and (iii) cathode/ETL interlayers that regulate band bending, suppress interfacial recombination, and block volatile halide migration. Finally, the outlook section discusses emerging opportunities and remaining challenges in further optimizing ETLs and top interlayers, with particular emphasis on advancing the operational stability and commercial viability of inverted PeSCs and their integration into high-performance tandem solar cells.","PeriodicalId":9909,"journal":{"name":"Chemical Science","volume":"2 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2026-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147736130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 Unified Strategy for Remote C-H Fluorination of Phenylacetic Acids and Their Homologues at meta-Position 苯基乙酸及其在位上的同系物的C-H远氟化的统一策略
IF 8.4 1区 化学
Chemical Science Pub Date : 2026-04-24 DOI: 10.1039/d6sc01331g
Kun Zhou, Xin Chen, Yue Wang, Yang-Jie Mao, Xin Yang, Kai Liu, Qi Pan, Dong-Liang Pan, Dan-Qian Xu, Shao-Jie Lou
{"title":"A Unified Strategy for Remote C-H Fluorination of Phenylacetic Acids and Their Homologues at meta-Position","authors":"Kun Zhou, Xin Chen, Yue Wang, Yang-Jie Mao, Xin Yang, Kai Liu, Qi Pan, Dong-Liang Pan, Dan-Qian Xu, Shao-Jie Lou","doi":"10.1039/d6sc01331g","DOIUrl":"https://doi.org/10.1039/d6sc01331g","url":null,"abstract":"The site-selective C-H bond fluorination of substituted aromarics at the electronic and geometric disfavored meta-position is of great interest and importance in medical chemistry and organic chemistry, yet has remained unexplored to date. By employing a newly developed U-shaped template, we herein report for the first time the Pd-catalysed meta-selective C-H bond fluorination of phenylacetic acids and their homologues. The reaction features high site-selectivity and is compatible with diverse homologues of phenylacetic acids, constituting a unified strategy for the remote aromatic C-H bond fluorination of carboxylic acids.","PeriodicalId":9909,"journal":{"name":"Chemical Science","volume":"30 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2026-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147744045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
The Characterisation and Reactivity of a Rh III η1 -σ-Alkane Complex and the Role of a Structurally Responsive Phosphine Ligand in Solid-State Molecular Organometallic Chemistry Rhⅲη - 1 -σ-烷烃配合物的表征和反应活性及膦配体在固态分子有机金属化学中的作用
IF 8.4 1区 化学
Chemical Science Pub Date : 2026-04-24 DOI: 10.1039/d6sc02133f
Joe Goodall, M. Arif Sajjad, Samantha Kathleen Furfari, Theo S Hatcher, Andrew S Weller, Stuart Alan Macgregor, Jason Martin Lynam, Mark R Warren, Samuel J. Page, Graham J. Tizzard, Kris Mark Altus
{"title":"The Characterisation and Reactivity of a Rh III η1 -σ-Alkane Complex and the Role of a Structurally Responsive Phosphine Ligand in Solid-State Molecular Organometallic Chemistry","authors":"Joe Goodall, M. Arif Sajjad, Samantha Kathleen Furfari, Theo S Hatcher, Andrew S Weller, Stuart Alan Macgregor, Jason Martin Lynam, Mark R Warren, Samuel J. Page, Graham J. Tizzard, Kris Mark Altus","doi":"10.1039/d6sc02133f","DOIUrl":"https://doi.org/10.1039/d6sc02133f","url":null,"abstract":"A combined experimental and computational study on the single-crystal to single-crystal addition of H2 to [Rh(Κ2-dtbpb)(NBD)][BArF4] [dtbpb = tBu2P(CH2)4PtBu2, NBD = norbornadiene, ArF = 3,5-C6H3(CF3)2] to give the Rh(III) ƞ1-σ-alkane complex [Rh(dtbpb’)(H)(ƞ1-C7H12)][BArF4] (dtbpb’ =Κ3-PCP-tBu2PCH2CHCH2CH2PtBu2) is reported, in which the supporting phosphine ligand has also undergone C–H activation of one of the methylene groups in the chelate backbone to form a trans-spanning Κ3-pincer-type ligand. Characterisation by variable temperature single-crystal X-ray diffraction, solid-state NMR spectroscopy, periodic DFT and IGHM/QTAIM calculations support this assignment, and also that the norbornane (NBA) alkane ligand can access low energy conformational isomers in the solid-state. Dissolving in CD2Cl2 displaces the alkane and the corresponding solvent adduct is formed, [Rh(dtbpb’)(H)(Κ1-ClCD2Cl)][BArF4]. DFT calculations, supported by experiment, indicate the C–H activation of the backbone occurs after full hydrogenation of the NBD to NBA, and not at a norbornene intermediate. Addition of propene to the crystalline σ-alkane complex displaces the NBA, and the phosphine ligand responds by reforming the Κ2-motif, consistent with C–H activation being thermodyamically favoured when trans to a weakly coordinating σ-alkane. These reversible bond activations of the chelating ligand in response to changes in the co-ligands demonstrate that significant structural reorganisation is possible in the crystalline environment","PeriodicalId":9909,"journal":{"name":"Chemical Science","volume":"9 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2026-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147744046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Copper-Catalyzed Enantioselective Interrupted Azide-Alkyne Cycloaddition to Access Axially Chiral Diaryl Ethers 铜催化对映选择性中断叠氮化物-炔环加成获得轴手性二芳醚
IF 8.4 1区 化学
Chemical Science Pub Date : 2026-04-24 DOI: 10.1039/d5sc09566b
Ruixue Wu, Lan Chen, Yihan Chen, Qimin Wu, Qirui Chen, Aijun Lin, Hequan Yao, Qiuyu Li, Shang Gao
{"title":"Copper-Catalyzed Enantioselective Interrupted Azide-Alkyne Cycloaddition to Access Axially Chiral Diaryl Ethers","authors":"Ruixue Wu, Lan Chen, Yihan Chen, Qimin Wu, Qirui Chen, Aijun Lin, Hequan Yao, Qiuyu Li, Shang Gao","doi":"10.1039/d5sc09566b","DOIUrl":"https://doi.org/10.1039/d5sc09566b","url":null,"abstract":"While transition metal-catalyzed enantioselective azide-alkyne cycloadditions are well-established for accessing 1,4-disubstituted triazoles, the direct enantioselective synthesis of chiral 1,4,5-trisubstituted triazoles from terminal alkynes via an interrupted process remains largely underdeveloped. Herein, we report a copper-catalyzed enantioselective interrupted azide-alkyne cycloadditions. This method enables the facile construction of enantioenriched axially chiral diaryl ethers bearing a 1,4,5-trisubstituted triazole moiety directly from terminal alkynes. Mechanistic studies reveal the absence of further kinetic resolution process of the product, underscoring the crucial role of our newly developed chiral ligand L5 in achieving excellent enantiocontrol and yield. The combination of Et3N and LiOtBu is essential to the inhibition of protonated byproduct. The orthogonal reactivity of the residual terminal alkyne and amine groups within the products provides versatile platforms for downstream chemistry, enriching the structural diversity of axially chiral diaryl ethers.","PeriodicalId":9909,"journal":{"name":"Chemical Science","volume":"8 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2026-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147744047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Regioselective [3+2] Cycloaddition Reactions of the Phosphorus and Arsenic Analogues of the Thiocyanate Anion 硫氰酸盐阴离子的磷和砷类似物的区域选择性[3+2]环加成反应
IF 8.4 1区 化学
Chemical Science Pub Date : 2026-04-24 DOI: 10.1039/d6sc01985d
Marc Baltrun, David Hanneberg, Florian Hett, Michael Seidl, Florian Weigend, Stephan Hohloch
{"title":"Regioselective [3+2] Cycloaddition Reactions of the Phosphorus and Arsenic Analogues of the Thiocyanate Anion","authors":"Marc Baltrun, David Hanneberg, Florian Hett, Michael Seidl, Florian Weigend, Stephan Hohloch","doi":"10.1039/d6sc01985d","DOIUrl":"https://doi.org/10.1039/d6sc01985d","url":null,"abstract":"Salt metathesis reactions of tris-amide zirconium iodide complex ([NRR']3ZrI (1-I) (with NRR' = 3,5-Xylyl-tert-butylamide, N(Xyl)( t Bu)) and sodium 2-phosphaethynthiolate (Na(diox)3SCP) or 2-arsaethynthiolate (Na(diox)3SCAs) in THF result in a [3+2] cycloaddition of two SCE (E = P, As) units forming five membered 2-thio-1,3,4-thiadiphosphole and 2-thio-1,3,4-thiadiarsole heterocycles with an exocyclic sulfur atom, bridging two zirconium fragments (general formula (N(RR')3Zr(κ-C,S-(SCE)2-Zr(NRR')3 with E = P (2-PP) or As (3-AsAs)). The reactions are regioselective and only the P,P / As,As isomers are formed in THF and quantum chemical investigations suggest a concerted ring formation in line with a [3+2] cycloaddition reaction. Switching the solvent to toluene, salt metathesis with NaSCP results in the selective formation of the second possible [3+2] cycloaddition regioisomer 2-SP, with a 3-thio-1,2,4-thiadiphosphole bridge, while for NaSCAs both regioisomers with an As-As bond (3-AsAs) and an S-As bond (3-SAs; 3-thio-1,2,4-thiadiarsole bridge) are observed. Attempts to obtain the free diphosphole/diarsole rings using methyl triflate resulted In the cleavae of only one zirconium center, giving access to the trilfate complex 1-OTf and the mono-metallated diphospholes/diarsoles 4-PP, 4-PS and 5-AsAs respectively.","PeriodicalId":9909,"journal":{"name":"Chemical Science","volume":"1 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2026-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147736129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Confining Ultrasmall Au Nanoclusters in an Ionic Ir(III)-Based Cage for Selective Photoreduction 在离子Ir(III)基笼中限制超小金纳米团簇的选择性光还原
IF 8.4 1区 化学
Chemical Science Pub Date : 2026-04-23 DOI: 10.1039/d6sc01364c
Zhuolin Shi, Fengyang Yu, Jinguo Wu, Yongai Yu, Hanshu Li, Xing Zhao, Rong Zhang, Wen-Jing Jiang, Yiwei Liu, Jianwei Wei, Xuezhao Li, Cheng He
{"title":"Confining Ultrasmall Au Nanoclusters in an Ionic Ir(III)-Based Cage for Selective Photoreduction","authors":"Zhuolin Shi, Fengyang Yu, Jinguo Wu, Yongai Yu, Hanshu Li, Xing Zhao, Rong Zhang, Wen-Jing Jiang, Yiwei Liu, Jianwei Wei, Xuezhao Li, Cheng He","doi":"10.1039/d6sc01364c","DOIUrl":"https://doi.org/10.1039/d6sc01364c","url":null,"abstract":"Balancing activity and stability in metal nanoclusters (NCs) for efficient catalysis remains challenging, particularly in tuning their surrounding microenvironment to control selectivity. Here, we report ultrasmall Au nanoclusters (0.73 ± 0.14 nm) confined within a photoactive dinuclear Ir(III)-based ionic cage, synergistically coupling spatial confinement with electronic cooperativity for selective photoreduction. The ionic cage enables controlled synthesis of ultrasmall Au-NCs, ensures longterm stability (&gt; 6 months) and facilitates photoinduced electron transfer (PET) from Ir(III) photosensitizers to Au active sites. This multi-function design drives complete nitrobenzene-to-azobenzene conversion with &gt; 98% selectivity under visible light (450 nm) at room temperature, avoiding aniline byproducts. Operando spectroscopy, kinetic studies, and DFT calculations reveal that substrate-sieving at cage windows directs the stepwise reduction pathway via azoxybenzene intermediates. The demonstrated integration of photoinduced electronic and steric microenvironment control of cage-encapsulated NC-based composites establishes a promising strategy for developing nanocatalysts with exceptional selectivity steering capability.","PeriodicalId":9909,"journal":{"name":"Chemical Science","volume":"20 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2026-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147739424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Cascade Charge-Transport-Chain Engineering in Alloy Nanocluster–Semiconductor Artificial Photosystems 合金纳米团簇-半导体人工光系统中的级联电荷-输运链工程
IF 8.4 1区 化学
Chemical Science Pub Date : 2026-04-23 DOI: 10.1039/d6sc02262f
Zi-Han Zheng, Qing Chen, Peng Su, Lifeng Cai, Jie Liang, Guangcan Xiao, Fangxing Xiao
{"title":"Cascade Charge-Transport-Chain Engineering in Alloy Nanocluster–Semiconductor Artificial Photosystems","authors":"Zi-Han Zheng, Qing Chen, Peng Su, Lifeng Cai, Jie Liang, Guangcan Xiao, Fangxing Xiao","doi":"10.1039/d6sc02262f","DOIUrl":"https://doi.org/10.1039/d6sc02262f","url":null,"abstract":"Atomically precise metal nanoclusters (NCs), featuring discrete electronic structure and pronounced quantum confinement effects, are emerging as promising photosensitizers for artificial photosystems; however, their practical implementation remains fundamentally constrained by rapid charge recombination and poorly controlled charge transport. Here, we introduce a conceptual cascade charge-transport-chain engineering strategy that addresses this intrinsic bottleneck by constructing directional and continuous carrier transport pathways across NC-semiconductor interfaces. By integrating alloy NCs photosensitization with atomic Ni doping of TiO2, a robust interfacial electronic coupling is established, enabling directional and accelerated extraction of photogenerated carriers. The resulting BNC/Ni-TiO2 heterostructures exhibit markedly enhanced visible-light-driven hydrogen evolution, accompanied by effective suppression of charge recombination within alloy NCs. Combined experimental and theoretical investigations reveal that the performance enhancement originates from cascade charge-transport-chain engineering rather than simple binary synergy. This work provides a general design principle for constructing tunable charge-transport pathways with alloy NCs, advancing NC-based artificial photosystems toward solar-to-hydrogen energy conversion.","PeriodicalId":9909,"journal":{"name":"Chemical Science","volume":"1 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2026-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147739425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
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