Herein,a novel copper metal-organic framework(MOF),[Cu_(2)(CPTPTA)(H_(2)O)]·CH_(3)NH_(3)^(+)·4H_(2)O·7NMF(1)(H_(5)CPTPTA=5’-(4-carboxyphenyl)-[1,1’:3’,1’’-terphenyl]-3,3’’,5,5’’-tetracarboxylic...Herein,a novel copper metal-organic framework(MOF),[Cu_(2)(CPTPTA)(H_(2)O)]·CH_(3)NH_(3)^(+)·4H_(2)O·7NMF(1)(H_(5)CPTPTA=5’-(4-carboxyphenyl)-[1,1’:3’,1’’-terphenyl]-3,3’’,5,5’’-tetracarboxylic acid,NMF=N-methylformamide),has been successfully synthesized via solvothermal reaction.By applying a linker desymmetrization strategy,compound 1 was constructed by a reduced-symmetry ligand CPTPTA^(5-),leading to three types of channels with various functional sites.Meanwhile,the functional sites promoted the adsorption of CO_(2),the uptakes being 123.2(2)and 66.8(2)cm^(3) g^(-1) at 273 and 298 K,respectively.Furthermore,the smaller channel exists as two kinds of active sites:Lewis acid sites(LASs)and Bronsted acid sites(BASs);whereas the larger one only exists as LASs.The synergistic catalysis of LASs and BASs makes compound 1 exhibit excellent CO_(2) cycloaddition efficiency towards propylene oxide,and the yield can reach 97%.Overall,such a linker desymmetrization strategy can afford an effective approach to synthesize novel functional MOF materials.展开更多
基金supported by the National Natural Science Foundation of China(no.21771078 and 21621001)the 111 Project(B17020).
文摘Herein,a novel copper metal-organic framework(MOF),[Cu_(2)(CPTPTA)(H_(2)O)]·CH_(3)NH_(3)^(+)·4H_(2)O·7NMF(1)(H_(5)CPTPTA=5’-(4-carboxyphenyl)-[1,1’:3’,1’’-terphenyl]-3,3’’,5,5’’-tetracarboxylic acid,NMF=N-methylformamide),has been successfully synthesized via solvothermal reaction.By applying a linker desymmetrization strategy,compound 1 was constructed by a reduced-symmetry ligand CPTPTA^(5-),leading to three types of channels with various functional sites.Meanwhile,the functional sites promoted the adsorption of CO_(2),the uptakes being 123.2(2)and 66.8(2)cm^(3) g^(-1) at 273 and 298 K,respectively.Furthermore,the smaller channel exists as two kinds of active sites:Lewis acid sites(LASs)and Bronsted acid sites(BASs);whereas the larger one only exists as LASs.The synergistic catalysis of LASs and BASs makes compound 1 exhibit excellent CO_(2) cycloaddition efficiency towards propylene oxide,and the yield can reach 97%.Overall,such a linker desymmetrization strategy can afford an effective approach to synthesize novel functional MOF materials.
