In this paper, we study some actions of a finite group G on the set of characters of its subgroups, and by using these actions we determine the existence of a p-block with given defect group in some cases.
Metal-organic frameworks(MOFs) are a class of porous inorganic-organic hybrid materials, which are constructed from diverse inorganic building units and multi-functional organic ligands. Highly ordered pore structures...Metal-organic frameworks(MOFs) are a class of porous inorganic-organic hybrid materials, which are constructed from diverse inorganic building units and multi-functional organic ligands. Highly ordered pore structures and tailored functionalization have made MOF materials potential for applications in many fields. Among various MOF materials, 3p-block metal(Al, Ga, and In)-based MOFs exhibit higher chemical stability than divalent transition metal-based MOFs due to their higher valence. In this review, Al-MOFs and In-MOFs were mainly discussed from the perspective of categories of inorganic building blocks, coordination types, and numbers of organic ligands. This review will give intuitive guidance to the design and synthesis of novel 3p-block metal-based MOFs with potential applications.展开更多
p-block metal composite oxides Sr_(1.36)Sb_(2)O_(6) and Sr_(2)Sb_(2)O_(7) synthesized by a hydrothermal method as photocatalysts in the degradation of tetracycline hydrochloride under UV light irradiation have been ex...p-block metal composite oxides Sr_(1.36)Sb_(2)O_(6) and Sr_(2)Sb_(2)O_(7) synthesized by a hydrothermal method as photocatalysts in the degradation of tetracycline hydrochloride under UV light irradiation have been extensively studied.The effects of synthesis conditions on the photocatalytic activity were discussed.The Sr_(1.36)Sb_(2)O_(6)-100°C-24 h-5 and Sr_(2)Sb_(2)O_(7)-150℃-24 h^(-2) samples prepared under optimal conditions exhibited remarkably different photocatalytic activities.The essential factors influencing the difference of photocatalytic performance were revealed.The results showed that the different photocatalytic activities observed for Sr_(1.36)Sb_(2)O_(6)and Sr_(2)Sb_(2)O_(7) could be attributed to their different electronic and crystal structures.Our work will provide a new perspective for the screening and design of p-block metal composite oxide photocatalysts to enhance the removal of organic pollutants in the environment.展开更多
Electrocatalytic CO_(2) reduction(ECR)to high-value fuels and chemicals offers a promising conversion technology for achieving sustainable carbon cycles.In recent years,although great efforts have been made to develop...Electrocatalytic CO_(2) reduction(ECR)to high-value fuels and chemicals offers a promising conversion technology for achieving sustainable carbon cycles.In recent years,although great efforts have been made to develop highefficiency ECR catalysts,challenges remain in achieving high activity and long durability simultaneously.Taking advantage of the adjustable structure,tunable component,and the M–Ch(M¼Sn,In,Bi,etc.,Ch¼S,Se,Te)covalent bonds stabilized metal centers,the p-block metal chalcogenides(PMC)based electrocatalysts have shown great potential in converting CO_(2) into CO or formates.In addition,the unique p-block electron structure can suppress the competitive hydrogen evolution reaction and enhance the adsorption of ECR intermediates.Seeking to systematically understand the structure–activity relationship of PMC-based ECR catalysts,this review summarizes the recent advances in designing PMC electrocatalysts for CO_(2) reduction based on the fundamental aspects of heterogeneous ECR process,including advanced strategies for optimizing the intrinsic activity and improving the loading density of catalytic sites,constructing highly stable catalysts,and tuning product.展开更多
Chalcogenirenium cations,featuring an unsaturated three-membered organic ring,are limited but known to be synthesizable from alkynes with bulky electron-donating groups.Metalla-chalcogenirenium compounds have been syn...Chalcogenirenium cations,featuring an unsaturated three-membered organic ring,are limited but known to be synthesizable from alkynes with bulky electron-donating groups.Metalla-chalcogenirenium compounds have been synthesized as stable compounds through the reactions of a cyclic metal-carbyne complex-metallapentalyne with PhSCI,PhSeCI or PhTeCI.As a result of the high strain in the three-membered metallacycles,the metalla-chalcogenirenium cations react readily with the base or chloride ions.These reactions furnish a series of unprecedented chalcogenirenium cations with intact M=C bonds.The intrinsic stabilization effect of aromaticity is further elucidated by density functional calculations.展开更多
文摘In this paper, we study some actions of a finite group G on the set of characters of its subgroups, and by using these actions we determine the existence of a p-block with given defect group in some cases.
基金This work was supported by the National Natural Science Foundation of China(No. 21771078).
文摘Metal-organic frameworks(MOFs) are a class of porous inorganic-organic hybrid materials, which are constructed from diverse inorganic building units and multi-functional organic ligands. Highly ordered pore structures and tailored functionalization have made MOF materials potential for applications in many fields. Among various MOF materials, 3p-block metal(Al, Ga, and In)-based MOFs exhibit higher chemical stability than divalent transition metal-based MOFs due to their higher valence. In this review, Al-MOFs and In-MOFs were mainly discussed from the perspective of categories of inorganic building blocks, coordination types, and numbers of organic ligands. This review will give intuitive guidance to the design and synthesis of novel 3p-block metal-based MOFs with potential applications.
基金financially supported by the National Natural Science Foundation of China(21875037,51502036)the National Key Research and Development Program of China(2016YFB0302303,2019YFC1908203)the Natural Science Foundation of Distinguished Young Scholars of Fujian Province(2019J06015)。
文摘p-block metal composite oxides Sr_(1.36)Sb_(2)O_(6) and Sr_(2)Sb_(2)O_(7) synthesized by a hydrothermal method as photocatalysts in the degradation of tetracycline hydrochloride under UV light irradiation have been extensively studied.The effects of synthesis conditions on the photocatalytic activity were discussed.The Sr_(1.36)Sb_(2)O_(6)-100°C-24 h-5 and Sr_(2)Sb_(2)O_(7)-150℃-24 h^(-2) samples prepared under optimal conditions exhibited remarkably different photocatalytic activities.The essential factors influencing the difference of photocatalytic performance were revealed.The results showed that the different photocatalytic activities observed for Sr_(1.36)Sb_(2)O_(6)and Sr_(2)Sb_(2)O_(7) could be attributed to their different electronic and crystal structures.Our work will provide a new perspective for the screening and design of p-block metal composite oxide photocatalysts to enhance the removal of organic pollutants in the environment.
基金support from the National Key Research and Development Program of China(No.2020YFB1505801)the National Natural Science Foundation of China(Nos.22025208,22075300,and 22102191)the Chinese Academy of Sciences,and the Key Laboratory of Education department of Shaanxi Province(20JS157).
文摘Electrocatalytic CO_(2) reduction(ECR)to high-value fuels and chemicals offers a promising conversion technology for achieving sustainable carbon cycles.In recent years,although great efforts have been made to develop highefficiency ECR catalysts,challenges remain in achieving high activity and long durability simultaneously.Taking advantage of the adjustable structure,tunable component,and the M–Ch(M¼Sn,In,Bi,etc.,Ch¼S,Se,Te)covalent bonds stabilized metal centers,the p-block metal chalcogenides(PMC)based electrocatalysts have shown great potential in converting CO_(2) into CO or formates.In addition,the unique p-block electron structure can suppress the competitive hydrogen evolution reaction and enhance the adsorption of ECR intermediates.Seeking to systematically understand the structure–activity relationship of PMC-based ECR catalysts,this review summarizes the recent advances in designing PMC electrocatalysts for CO_(2) reduction based on the fundamental aspects of heterogeneous ECR process,including advanced strategies for optimizing the intrinsic activity and improving the loading density of catalytic sites,constructing highly stable catalysts,and tuning product.
基金the National Natural Science Foundation of China(Nos.U1705254,21871225,and 21931002)the Shenzhen Science and Technology Innovation Committee(No.JCYJ20200109140812302)+1 种基金the Fundamental Research Funds for the Central Universities(No.20720190042)We thank Dr.Liu Leo Liu for constructive criticism of the manuscript.
文摘Chalcogenirenium cations,featuring an unsaturated three-membered organic ring,are limited but known to be synthesizable from alkynes with bulky electron-donating groups.Metalla-chalcogenirenium compounds have been synthesized as stable compounds through the reactions of a cyclic metal-carbyne complex-metallapentalyne with PhSCI,PhSeCI or PhTeCI.As a result of the high strain in the three-membered metallacycles,the metalla-chalcogenirenium cations react readily with the base or chloride ions.These reactions furnish a series of unprecedented chalcogenirenium cations with intact M=C bonds.The intrinsic stabilization effect of aromaticity is further elucidated by density functional calculations.
