Inorganic Chemistry Frontiers最新文献

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Composition Engineering of Spinel High-Entropy Oxide Self-Supported Electrodes for High-Performance Large-Current Oxygen Evolution Electrocatalysis 高性能大电流析氧电催化尖晶石高熵氧化物自支撑电极的组成工程
IF 7 1区 化学
Inorganic Chemistry Frontiers Pub Date : 2026-09-02 DOI: 10.1039/d6qi01512c
Hao Wang,Ahsan Mehmood,Ali Irshad,Ziyu Yang,Zhaohuan Wei,Liang He,C. Venkata Reddy,Jaesool Shim,Hui Tang
{"title":"Composition Engineering of Spinel High-Entropy Oxide Self-Supported Electrodes for High-Performance Large-Current Oxygen Evolution Electrocatalysis","authors":"Hao Wang,Ahsan Mehmood,Ali Irshad,Ziyu Yang,Zhaohuan Wei,Liang He,C. Venkata Reddy,Jaesool Shim,Hui Tang","doi":"10.1039/d6qi01512c","DOIUrl":"https://doi.org/10.1039/d6qi01512c","url":null,"abstract":"The development of non-noble metal oxygen evolution reaction (OER) electrocatalysts combining high activity, long-term stability and large-current output capability is of great significance for practical water electrolysis. In this work, six spinel-type high-entropy oxide (HEO) self-supported electrodes with tunable compositions are in situ constructed on nickel foam substrates via an impregnation-combustion approach. FeCoNiCrAl-HEO achieves the best overall OER performance with low overpotentials, the minimum Tafel slope and 500 h stable operation at 1 A cm⁻²; FeCoNiMnCr-HEO shows superior intrinsic kinetics, and Zn incorporation deteriorates the catalytic activity of the system. Density functional theory calculations demonstrate that the low theoretical overpotential of FeCoNiCrAl-HEO originates from enhanced hybridization between O-2p and transition metal d orbitals and a moderate d-band center, which optimizes the adsorption of *OH, *O and *OOH intermediates. This work uncovers the electronic modulation effect of HEO composition tuning and offers new insights into the rational design of highperformance self-supported high-entropy electrocatalysts.","PeriodicalId":79,"journal":{"name":"Inorganic Chemistry Frontiers","volume":"37 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2026-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148877661","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
Bent Ligand Engineering for Polyoxovanadate-based Metal Organic Polyhedra: Steering Structural Transformation and Adsorption Performance via Conformational Complementarity 基于多钒氧酸盐的金属有机多面体的弯曲配体工程:通过构象互补引导结构转变和吸附性能
IF 7 1区 化学
Inorganic Chemistry Frontiers Pub Date : 2026-09-02 DOI: 10.1039/d6qi01089j
Meng-Yu Li,Ke-Wei Tong,Li Zhang,Ming-Hua Lu,Abudula Maimaitijiang,Lu-Wen Zhu,Zhen-Peng Ma,Guan-You Yan,Bai-Qiao Song,Zunqi Liu,Peng Yang,Yan-Hu Wang
{"title":"Bent Ligand Engineering for Polyoxovanadate-based Metal Organic Polyhedra: Steering Structural Transformation and Adsorption Performance via Conformational Complementarity","authors":"Meng-Yu Li,Ke-Wei Tong,Li Zhang,Ming-Hua Lu,Abudula Maimaitijiang,Lu-Wen Zhu,Zhen-Peng Ma,Guan-You Yan,Bai-Qiao Song,Zunqi Liu,Peng Yang,Yan-Hu Wang","doi":"10.1039/d6qi01089j","DOIUrl":"https://doi.org/10.1039/d6qi01089j","url":null,"abstract":"Achieving predictable assembly of metal-organic polyhedra (MOPs) with targeted architectures from designed building blocks is a persistent fundamental challenge. Ligand engineering constitutes a pathway toward addressing this challenge. This work details the assembly of a rigid, trigonal-planar polyoxovanadate cluster, [V6O6(OCH3)9(SO4)]5–, with a series of bent ditopic/tetratopic ligands through a bridging-ligand-substitution strategy, systematically exploring the effect of ligand bend angle on the structural outcome. Effective co-assembly, leading to the selective formation of pseudo-tetrahedral and spherical cages, requires a perfect complementarity between the ligand conformation (bend angle and number of carboxylate groups) and the structural features of the vanadate cluster. Moreover, the charge of the spherical structure is tuned by the intrinsic charge of the ligands. The difference in iodine uptake between the two cages is governed by the electron-rich aromatic rings and the pores arising from the packing of the cage architectures. These results demonstrate that the intrinsic configurational features of the ligands determine not only the topology of the resulting metal-organic architectures but also their functional properties.","PeriodicalId":79,"journal":{"name":"Inorganic Chemistry Frontiers","volume":"35 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2026-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148877655","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
K2CO3-assisted template-confined synthesis of CsPbBr3@SiO2 nanocomposites with near-unity quantum yield and robust stability for color-conversion micro-LEDs k2co3辅助模板约束合成具有近单位量子产率和稳定的彩色转换微型led CsPbBr3@SiO2纳米复合材料
IF 7 1区 化学
Inorganic Chemistry Frontiers Pub Date : 2026-09-01 DOI: 10.1039/d6qi01603k
Jin Han,Baolong Jing,Shengxing Pan,Xudong Cheng,Dehua Fan,Xinmin Zhang,Yunfei Zhu,RUI ZOU,Xiaoyi Fu,Lei Wang,Chunhui Duan,Kai Zhang,Fei Huang,Liang Li,Xueqing Xu
{"title":"K2CO3-assisted template-confined synthesis of CsPbBr3@SiO2 nanocomposites with near-unity quantum yield and robust stability for color-conversion micro-LEDs","authors":"Jin Han,Baolong Jing,Shengxing Pan,Xudong Cheng,Dehua Fan,Xinmin Zhang,Yunfei Zhu,RUI ZOU,Xiaoyi Fu,Lei Wang,Chunhui Duan,Kai Zhang,Fei Huang,Liang Li,Xueqing Xu","doi":"10.1039/d6qi01603k","DOIUrl":"https://doi.org/10.1039/d6qi01603k","url":null,"abstract":"Perovskite quantum dots exhibit competitive advantages over conventional phosphors and other quantum dots in color-conversion micro-LEDs owing to their narrow bandwidth, tunable bandgap, and high quantum yield. Although various solution-related synthetic methods have been developed, they usually involve considerable amounts of organic solvents. Meanwhile, the low quantum yield and poor stability of perovskite quantum dots remains one of the greatest challenges. Herein, we propose a K2CO3-assisted template-confined synthesis strategy to prepare CsPbBr3@SiO2 nanocomposites with near-unity photoluminescence quantum yield (98.20%) and robust stability. Adding K2CO3 not only homogenizes the proportion of CsPbBr3 PQDs in each SiO2 nanosphere, but also prevents Br⁻ ions from escaping at high temperatures. By firmly encapsulating CsPbBr3 quantum dots within SiO2 templates, this approach effectively isolates them from external water, oxygen, and heat, thereby overcoming the instability of colloidal perovskite quantum dots. We believe that this facile strategy will open a new avenue for the green synthesis of high-performance perovskite luminescent materials.","PeriodicalId":79,"journal":{"name":"Inorganic Chemistry Frontiers","volume":"13 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148877654","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
RuO 2 -Based Acidic OER Catalysts: Reaction Mechanisms, Structure Descriptors, and Function Strategies 基于tio2的酸性OER催化剂:反应机理、结构描述符和功能策略
IF 7 1区 化学
Inorganic Chemistry Frontiers Pub Date : 2026-08-28 DOI: 10.1039/d6qi01409g
Yanan Liu,Yijun Liu,Yupeng Wang,Zhen Zhang,Fengming Zhou,Yueyang Cheng,Zexing Wu,Jingqi Chi,Zhenyu Xiao,Lei Wang
{"title":"RuO 2 -Based Acidic OER Catalysts: Reaction Mechanisms, Structure Descriptors, and Function Strategies","authors":"Yanan Liu,Yijun Liu,Yupeng Wang,Zhen Zhang,Fengming Zhou,Yueyang Cheng,Zexing Wu,Jingqi Chi,Zhenyu Xiao,Lei Wang","doi":"10.1039/d6qi01409g","DOIUrl":"https://doi.org/10.1039/d6qi01409g","url":null,"abstract":"Proton exchange membrane water electrolysis (PEMWE) is a promising technology for sustainable hydrogen production, yet its large-scale deployment is hindered by the sluggish acidic oxygen evolution reaction (OER) and the dependence on scarce Ir-based anode catalysts. RuO2 has emerged as an attractive alternative owing to its high intrinsic OER activity and lower cost. However, its practical application remains constrained by a fundamental activity-stability trade-off. Recent studies show that similar structural modifications of RuO2 may trigger different OER pathways, indicating that catalyst design based solely on apparent functional engineering is insufficient. This review establishes structure descriptors as a conceptual bridge between reaction mechanisms and catalyst modification strategies engineering. The fundamental acidic OER mechanisms, including the adsorbate evolution mechanism (AEM), lattice oxygen mechanism (LOM), and oxide path mechanism (OPM), are discussed together with the dynamic structural evolution and degradation pathways of RuO2. Thermodynamic, electronic-structure, and coordination-environment descriptors are then summarized to clarify how reaction energetics, Ru 4d-O 2p interactions, Ru-O covalency, local coordination, and lattice oxygen (OL) activity govern catalytic performance. Recent advances in grain boundary engineering, oxygen vacancy (Ov) engineering, interface engineering, strain control, morphology and dimension engineering, and element doping are further reviewed from a descriptor-guided perspective. Catalyst–electrolyte interfacial effects, techno-economic considerations, and future opportunities are also highlighted, providing guidance for the rational design of highly active, durable, and economically viable RuO2-based acidic OER catalysts.","PeriodicalId":79,"journal":{"name":"Inorganic Chemistry Frontiers","volume":"38 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2026-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148853696","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
Solving Long-Standing Hygroscopicity and Thermal Stability Issues of the Nonlinear Optical Crystal α-LiIO3 via Homogeneous Cations Exchange 通过均相阳离子交换解决α-LiIO3非线性光学晶体长期存在的吸湿性和热稳定性问题
IF 7 1区 化学
Inorganic Chemistry Frontiers Pub Date : 2026-08-28 DOI: 10.1039/d6qi01807f
Jiahao Wan,Zhengli Liang,Xiuying Zhang,Hongming Liu,Le Yang,Ping Wang,Lehui Liu,Xing-Xing Jiang,Zheshuai Lin,Qi Wu
{"title":"Solving Long-Standing Hygroscopicity and Thermal Stability Issues of the Nonlinear Optical Crystal α-LiIO3 via Homogeneous Cations Exchange","authors":"Jiahao Wan,Zhengli Liang,Xiuying Zhang,Hongming Liu,Le Yang,Ping Wang,Lehui Liu,Xing-Xing Jiang,Zheshuai Lin,Qi Wu","doi":"10.1039/d6qi01807f","DOIUrl":"https://doi.org/10.1039/d6qi01807f","url":null,"abstract":"α-LiIO3 is a crystalline material with versatile functions and outstanding performance such as second harmonic generation (SHG). However, its large-scale application encounters formidable obstacles of multiple-phases and high hygroscopicity, which stem from its ionic crystal nature. By elaborately selecting similar sized In3+/Fe3+ ions to partially exchange the Li+ ions within α-LiIO3 structure, two metal iodates with homogeneous co-occupancy of Li+ and In3+/Fe3+ ions in the original Li+ lattices, namely LiIn1/3□2/3(IO3)2 (In-1) and Li0.5Fe0.5□1(IO3)2 (Fe-2), have been successfully synthesized. Both of them entirely maintain the structure of α-LiIO3 and inherit its nonlinear optical-favorable merits, exhibiting enhanced SHG responses of 15 × KH2PO4 (In-1) and 11 × KH2PO4 (Fe-2). Most significantly, the formed In/Fe‒O covalent bonds solve the long-standing hygroscopicity and thermo-induced phase transition issues of α-LiIO3, laying down and clearing the way for its application expansion. Our work unlocks the broad application potential of α-LiIO3 and paves the way for emplying cation co-occupancy strategy to develop novel nonlinear optical materials with enhanced performances.","PeriodicalId":79,"journal":{"name":"Inorganic Chemistry Frontiers","volume":"489 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2026-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148853699","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
Nanoporous calcium carbonate: nanoarchitectonics-enabled pore engineering and applications 纳米多孔碳酸钙:纳米结构的孔隙工程和应用
IF 7 1区 化学
Inorganic Chemistry Frontiers Pub Date : 2026-08-28 DOI: 10.1039/d6qi00926c
Han Liu,Qin Qin,Yaqin Zhu,Bin He,Shiyuan Wang,Gaigai Duan,Chunmei Zhang,Xiaoshuai Han,Shuijian He,Shaohua Jiang
{"title":"Nanoporous calcium carbonate: nanoarchitectonics-enabled pore engineering and applications","authors":"Han Liu,Qin Qin,Yaqin Zhu,Bin He,Shiyuan Wang,Gaigai Duan,Chunmei Zhang,Xiaoshuai Han,Shuijian He,Shaohua Jiang","doi":"10.1039/d6qi00926c","DOIUrl":"https://doi.org/10.1039/d6qi00926c","url":null,"abstract":"Nanoporous calcium carbonate (NPCC) integrates nanoscale dimensions with an accessible porous architecture, making it attractive for drug delivery, water and soil remediation, controlled agrochemical release, and energy-related applications. This review critically summarizes recent progress in NPCC synthesis, pore-structure regulation, surface functionalization, and application-driven performance. We compare templating, co-precipitation, biomineralization, and leaching-carbonation routes in terms of pore-size control, polymorph selectivity, scalability, and sustainability. The pore-size distribution, specific surface area, and polymorph composition of NPCC can be tuned through precursor chemistry, supersaturation, templates, additives, and post-modification. Functional strategies, including ion doping and organic surface modification, further improve application-specific properties, as illustrated by reported solar absorptance up to 74.1% and drug-loading efficiencies up to 25.78 wt%. Rather than treating NPCC as a generic porous carrier, this review emphasizes the structure-function relationships that govern pH-responsive release, heavy-metal sequestration, pesticide retention, and thermochemical cycling. Remaining challenges include reproducible scale-up, polymorph and pore stability during cycling, impurity control, and benchmarking under realistic operating conditions. The high biocompatibility, pH responsiveness and adsorption capacity of NPCC make it an ideal material for drug slow release, heavy metal removal and controlled release of pesticides. Despite significant progress, its scale-up production, cyclic stability and optimization for specific application scenarios are still the focus of future research. The aim of this paper is to provide comprehensive guidance on the design and application of NPCCs and to promote their practical translation into sustainable technologies.","PeriodicalId":79,"journal":{"name":"Inorganic Chemistry Frontiers","volume":"40 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2026-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148853697","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
Selective access to distinct α-alkylated ketones through composition-tuned nickel-based nanoparticle catalysts 通过调整镍基纳米颗粒催化剂选择性获得不同的α-烷基化酮
IF 7 1区 化学
Inorganic Chemistry Frontiers Pub Date : 2026-08-28 DOI: 10.1039/d6qi00726k
Hemant Joshi,Neha Mathur,Kalpana Sharma,Partha Roy
{"title":"Selective access to distinct α-alkylated ketones through composition-tuned nickel-based nanoparticle catalysts","authors":"Hemant Joshi,Neha Mathur,Kalpana Sharma,Partha Roy","doi":"10.1039/d6qi00726k","DOIUrl":"https://doi.org/10.1039/d6qi00726k","url":null,"abstract":"Herein, compositionally varied nickel-based nanocatalysts, namely Ni0.85Se, NiTe2, and Ni nanoparticles (NPs), are employed to selectively control product formation in the α-alkylation of ketones with benzyl alcohols. Using the α-alkylation of acetophenone with benzyl alcohol as a model reaction, a clear composition selectivity relationship is observed. Notably, Ni0.85Se NPs selectively yield 84% of gem-α,α-dialkylated ketones (6a) as the major product; in contrast, NiTe2 NPs produce 68% of the saturated monoalkylated ketone (4a), whereas Ni NPs afford 74% of the α,β-unsaturated monoalkylated ketone (3a) under similar reaction conditions. The catalytic systems operate efficiently under mild reaction conditions and require remarkably low catalyst loadings (0.00593 mmol/10 mg for Ni0.85Se, 0.00610 mmol/10 mg for NiTe2, and 0.00508 mmol/10 mg for Ni). Mechanistic investigations, including control experiments and in situ HRMS studies, suggest that catalysis proceeds via a hydrogen-borrowing pathway, with composition-dependent divergence in reaction intermediates governing product selectivity. The heterogeneous nature of the catalysis is confirmed by mercury poisoning and hot filtration tests. Furthermore, the nanocatalysts exhibit excellent stability and recyclability, maintaining catalytic performance for up to eleven reaction cycles without significant loss in yield. Overall, this work demonstrates that tuning the catalyst composition modulates particle size, surface area, surface oxidation state, and electronic structure, providing a powerful strategy for controlling product selectivity in nickel-based nanocatalysis.","PeriodicalId":79,"journal":{"name":"Inorganic Chemistry Frontiers","volume":"9 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2026-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148853698","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
Two Sandwich-Type Borovanadate Clusters for Synergistic Functions in Resistive Switching, Proton Conduction, and Magnetic Coupling 两个三明治型硼钒酸盐团簇在电阻开关、质子传导和磁耦合中的协同作用
IF 7 1区 化学
Inorganic Chemistry Frontiers Pub Date : 2026-08-28 DOI: 10.1039/d6qi01442a
Bi-Ling Huang,Guang-Qu Ke,Ze-Feng Ma,Yi-Ping Chen,Hao-Hong Li
{"title":"Two Sandwich-Type Borovanadate Clusters for Synergistic Functions in Resistive Switching, Proton Conduction, and Magnetic Coupling","authors":"Bi-Ling Huang,Guang-Qu Ke,Ze-Feng Ma,Yi-Ping Chen,Hao-Hong Li","doi":"10.1039/d6qi01442a","DOIUrl":"https://doi.org/10.1039/d6qi01442a","url":null,"abstract":"The Single-function materials can no longer meet the demands for integration and multifunctionality required by nextgeneration molecular devices, making the development of cluster-based materials capable of achieving synergistic responses across multiple functions on a single crystalline platform a current research focus. This study successfully synthesized two sandwich-type boron-vanadium-oxygen cluster (POVB) compounds with identical [V10] cores but distinct cluster cavity fillers:1) and K(H2O)[Zn(H2O)4][Zn(H2O)3(Zn4B2O4)(SO4)V10B28O61(OH)13]•10H2O (2). Both compounds exhibit three key functionalities: resistance transition, proton conductivity, and magnetic coupling. Research revealed that compound 2, featuring intercalated inorganic metal chains, demonstrates significantly superior overall performance compared to compound 1 with organic ligands. Its proton conductivity reaches 5.73 × 10 -3 S•cm⁻¹ at 85°C under 98% relative humidity. Both compounds enable memristors with high switching ratios of approximately 10 4 . However, Compound 1 demonstrates WORM-type memory behavior, whereas Compound 2 exhibits reversible bipolar resistive behavior and transitions to WORM-type at 120°C. Additionally, both compounds demonstrate pronounced antiferromagnetic coupling interactions. This study demonstrates that strategic structural design enables multifunctional synergy in single-cluster crystalline materials, providing novel design insights for developing next-generation multifunctional molecular devices.","PeriodicalId":79,"journal":{"name":"Inorganic Chemistry Frontiers","volume":"9 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2026-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148853693","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
Unveiling Key Factors Governing the Catalytic Performance of Half-Metallocene Complexes for Photochemical CO Reduction and Hydrogen Production: Relativistic Effects and Charge Delocalization 揭示控制半茂金属配合物光化学CO还原和产氢催化性能的关键因素:相对论效应和电荷离域
IF 7 1区 化学
Inorganic Chemistry Frontiers Pub Date : 2026-08-28 DOI: 10.1039/d6qi01142j
Daehan Lee,Min-Jong Bong,Seunghwan Cha,Sangheon Jeong,Jung-Min Ji,Won-Jo Jung,Nady Fathy,Ho-Jin Son
{"title":"Unveiling Key Factors Governing the Catalytic Performance of Half-Metallocene Complexes for Photochemical CO Reduction and Hydrogen Production: Relativistic Effects and Charge Delocalization","authors":"Daehan Lee,Min-Jong Bong,Seunghwan Cha,Sangheon Jeong,Jung-Min Ji,Won-Jo Jung,Nady Fathy,Ho-Jin Son","doi":"10.1039/d6qi01142j","DOIUrl":"https://doi.org/10.1039/d6qi01142j","url":null,"abstract":"We report a modular platform of electronically tuned half-metallocene catalysts, [Cp*MIII(4,4′-R2-bpy)Cl]+ (M = Ir, Rh, Co; R = OMe, tBu, Me, H, CF3), that clarifies how the choice of metal and the electronic character of the bipyridine ligand dictate two-electron reduction capacity—and thereby control catalytic activity and product distribution. Cyclic voltammetry discloses R-dependent shifts in the reduction event (Epc) and metal/ligand-electronics–driven modulation (broadening or narrowing) of the anodic–cathodic peak separation (ΔEpa–pc), a pragmatic indicator of two-electron accepting capacity. Under homogeneous photolysis with an Ir(III) photosensitizer in CO2-saturated DMF/TEOA, Cp*Ir(III) catalysts channel reactivity toward formate (Ir-tBu, TONformate = 804 at 36 h), whereas Rh(III) analogues bias H2 evolution, with Rh-CF3 giving the highest H2 production and selectivity (TONhydrogen = 1534; 92.9%). These divergent outcomes correlate with the facility of accessing the one-electron-reduced metal hydride (OERMH), which scales with ΔEpa–pc value rather than with Epc alone. In accord with this relationship, Cp*Co(III) complexes exhibiting negligible ΔEpa–pc display uniformly poor performance. Density functional theoretical (DFT) calculation shows that Ir(III) complexes retain dominant bipyridyl character in the LUMO across substituents, enabling strong d–π mixing and charge delocalization; Rh(III) and Co(III) congeners display substituent-dependent LUMO delocalization, markedly enhanced only by CF3 substituent. In progressing from 3d (Co) < 4d (Rh) < 5d (Ir), delocalization into the bipyridyl π* manifold increases and is further enhanced by electron-withdrawing groups, thereby stabilizing the relevant two-electron reduced states. Overall, these experimental and theoretical results establish design rules linking ligand π* energetics and metal–ligand mixing to metal hydride-mediated catalytic pathways, thereby providing a predictive basis for dictating the conversion activity toward CO2 reduction and hydrogen production.","PeriodicalId":79,"journal":{"name":"Inorganic Chemistry Frontiers","volume":"27 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2026-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148853694","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
Engineering an Artificial His-Brace Mimic in Azurin for Catalytic Oxidative Cleavage of Polysaccharides 在蓝蛋白中设计人工his -支架模拟物催化氧化裂解多糖
IF 7 1区 化学
Inorganic Chemistry Frontiers Pub Date : 2026-08-27 DOI: 10.1039/d6qi01239f
Jindi Luo,Chunmao He
{"title":"Engineering an Artificial His-Brace Mimic in Azurin for Catalytic Oxidative Cleavage of Polysaccharides","authors":"Jindi Luo,Chunmao He","doi":"10.1039/d6qi01239f","DOIUrl":"https://doi.org/10.1039/d6qi01239f","url":null,"abstract":"Lytic polysaccharide monooxygenases (LPMOs) are copper-dependent enzymes capable of oxidative cleavage of recalcitrant polysaccharides, yet their synthetic mimicry remains challenging. Previous efforts have engineered a histidine-brace motif in azurin to catalyze polysaccharide cleavage, but the biosynthetic methods used in those constructs restrict the incorporation of non‑natural ligands and may limit active-site tunability. Moreover, our own prior work introduced a N,N-bis(pyridylmethyl) amine (DPA) ligand at the axial Met121 site via chemical protein synthesis, yet only achieved activity on a small-molecule model substrate. Here, we report the design and semi-synthesis of azurin-based artificial metalloenzymes incorporating a histidine brace-mimicking DPA ligand via native chemical ligation. Seven DPA-containing azurin variants were prepared, and spectroscopic studies confirmed the formation of type II copper centers with redox potentials analogous to those of natural LPMOs. The most active variant, CuII–16, exhibited efficient C–H hydroxylation and glycosidic bond cleavage using 4-nitrophenyl-β-D-glucopyranoside (PNPG) as a model substrate, achieving a total turnover number (TTN) of 371 ± 6 and a kcat/Km value of 6351 ± 251 min−1 M−1. Moreover, CuII–16 catalyzed the oxidative depolymerization of natural polysaccharides—starch and cellulose—producing soluble oligosaccharides with characteristic C4-oxidation patterns. This work demonstrates the power of chemical protein synthesis in constructing tailored metalloenzymes for biomass conversion and provides a versatile platform for developing next-generation biocatalysts.","PeriodicalId":79,"journal":{"name":"Inorganic Chemistry Frontiers","volume":"4 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2026-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148853736","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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