One porous framework [Zn4（μ4-O）（μ4-4-pca）3]·2（DEF）·2（H2O）（1, 4-H2Pca = 4-pyrazolecarboxylic acid, DEF = N,N-diethylformamide） with MOF-5 type topology has been synthesized solvothermally. Signifi...One porous framework [Zn4（μ4-O）（μ4-4-pca）3]·2（DEF）·2（H2O）（1, 4-H2Pca = 4-pyrazolecarboxylic acid, DEF = N,N-diethylformamide） with MOF-5 type topology has been synthesized solvothermally. Significantly, this compound exhibits high capacity of C2 hydrocarbons. C2H2 capacity could compare with the highest value of the reported MOFs, far exceeding that of MOF-5, as well as the high selectivity adsorption of C2s over C1.展开更多
Via the strategy of charge balance,one new pillared layered metal-organic framework [Zn2（TNB）（2-nim）]（H3TNB = 4,4？,4？？-nitrilotribenzoicacid,2-nim = 2-nitroimidazole）（1） was successfully synthesized based o...Via the strategy of charge balance,one new pillared layered metal-organic framework [Zn2（TNB）（2-nim）]（H3TNB = 4,4？,4？？-nitrilotribenzoicacid,2-nim = 2-nitroimidazole）（1） was successfully synthesized based on mixed ligands,where binuclear [Zn2（CO2）3]~＋ cluster-based cationic layers [Zn2（TNB）]~＋ are connected by deprotonated 2-nitroimidazole.Meanwhile,CO2 adsorption bahaviors and luminescent property of compound 1 were investigated.展开更多
One new chiral zeolitic rAo-type metal-organic framework[Cd(L-ala)2]n(l)has been successfully synthesized based on L-alanine chiral ligand,which demonstrates the feasibility of fabricating MOF that integrates the 4-co...One new chiral zeolitic rAo-type metal-organic framework[Cd(L-ala)2]n(l)has been successfully synthesized based on L-alanine chiral ligand,which demonstrates the feasibility of fabricating MOF that integrates the 4-connected zeotype topology by the employment of Z-alanine.To the best of knowledge,it's the first report that metal-organic framework based on amino acid features the chiral zeolitic rho-type structure.Compound 1 was characterized by X-ray powder diffraction,elemental analysis and single-crystal X-ray diffraction.Crystal data:CbH9CdN2O4,Mr=285.55,cubic system,space group/432,a=24.0795(6),V=13961.9(10)A3,Z=48,Dc=1.630 Mg/m3,F(000)=6672,μ(MoKa)=1.865 mm-1,S=1.058,R=0.0271 and wR=0.0312 for 1870 observed reflections with I>2δ(I).The circular dichroism(CD)property of compound 1 was also investigated.展开更多
Biothiols such as cysteine(Cys),homocysteine(Hcy)and glutathione(GSH)act as critical roles in maintaining biological redox homeostasis,which is crucial for a plenty of physiological and pathological processes.Therefor...Biothiols such as cysteine(Cys),homocysteine(Hcy)and glutathione(GSH)act as critical roles in maintaining biological redox homeostasis,which is crucial for a plenty of physiological and pathological processes.Therefore,the detection of biothiols is very important and beneficial for many applications.Herein,we have designed and developed a new crystal dimethyl 4-(2,4-dinitrophenylsulfonyloxy)pyridine-2,6-dicarboxylate(P)with 2,4-dinitrobenzene-1-sulfonyl(DNBS)pendant for light-up and detection of biothiols(Cys was selected as the analyte model).The fluorescence"off-on"switch is triggered by the cleavage of DNBS unit by the interaction with biothiols via nucleophilic aromatic substitution reaction.The turn-on fluorescent probe exhibited excellent selectivity and sensitivity toward biothiols.展开更多
A microporous and robust bimetal-organic framework[Cd_(2)Ba(NH_(2)-BTB)_(2)]·2(DMA)·2(H_(2)O)(1)was constructed by mixing the heterometallic nodes and an tridentate carboxyl ligand with amino group,benefitin...A microporous and robust bimetal-organic framework[Cd_(2)Ba(NH_(2)-BTB)_(2)]·2(DMA)·2(H_(2)O)(1)was constructed by mixing the heterometallic nodes and an tridentate carboxyl ligand with amino group,benefiting from the synergistic effect of active sites,exposed amino groups and ultramicroporous structure.This compound displays an extraordinary selectivity of CO_(2)/CH4 and C_(2)H_(2)/CH_(4)(16.7 and 146.3)at 298 K and 1 atm,which can exceed those of many reported MOFs under the same conditions.This work provides an important model to design metal-organic frameworks for the adsorption and separation of small gas molecules.展开更多
A water-stable porous anionic metal-organic framework(MOF),[(CH3)2NH2][In(TCPP)4/3]n·(2DMF)n(3H2O)n(1,TCPP=1,1,2,2-tetra(4-carboxylbiphenyl)ethylene),was synthesized.Here,compound 1 showed extremely high sensitiv...A water-stable porous anionic metal-organic framework(MOF),[(CH3)2NH2][In(TCPP)4/3]n·(2DMF)n(3H2O)n(1,TCPP=1,1,2,2-tetra(4-carboxylbiphenyl)ethylene),was synthesized.Here,compound 1 showed extremely high sensitivity and selectivity to current general-purpose pesticide 2,6-dichloro-4-nitroaniline(DCN)in aqueous solution.The fluorescence intensity of compound 1 could be decreased as much as 80%by 6 mL DCN,and it was almost completely quenched only with 20 mL DCN.The results indicate that compound 1 can act as a fluorescent probe for DCN.展开更多
基金supported financially by the National Natural Science Foundation of China(No.21601080)the Key Scientific Research Projects of Higher Education of He'nan Province(16A150016)
文摘One porous framework [Zn4（μ4-O）（μ4-4-pca）3]·2（DEF）·2（H2O）（1, 4-H2Pca = 4-pyrazolecarboxylic acid, DEF = N,N-diethylformamide） with MOF-5 type topology has been synthesized solvothermally. Significantly, this compound exhibits high capacity of C2 hydrocarbons. C2H2 capacity could compare with the highest value of the reported MOFs, far exceeding that of MOF-5, as well as the high selectivity adsorption of C2s over C1.
基金financially supported by the National Natural Science Foundation of China(No.21601080)the Key Scientific Research Projects of Higher Education of He'nan Province(16A150016)
文摘Via the strategy of charge balance,one new pillared layered metal-organic framework [Zn2（TNB）（2-nim）]（H3TNB = 4,4？,4？？-nitrilotribenzoicacid,2-nim = 2-nitroimidazole）（1） was successfully synthesized based on mixed ligands,where binuclear [Zn2（CO2）3]~＋ cluster-based cationic layers [Zn2（TNB）]~＋ are connected by deprotonated 2-nitroimidazole.Meanwhile,CO2 adsorption bahaviors and luminescent property of compound 1 were investigated.
基金supported financially by National Natural Science Foundation of China(No.21601080)
文摘One new chiral zeolitic rAo-type metal-organic framework[Cd(L-ala)2]n(l)has been successfully synthesized based on L-alanine chiral ligand,which demonstrates the feasibility of fabricating MOF that integrates the 4-connected zeotype topology by the employment of Z-alanine.To the best of knowledge,it's the first report that metal-organic framework based on amino acid features the chiral zeolitic rho-type structure.Compound 1 was characterized by X-ray powder diffraction,elemental analysis and single-crystal X-ray diffraction.Crystal data:CbH9CdN2O4,Mr=285.55,cubic system,space group/432,a=24.0795(6),V=13961.9(10)A3,Z=48,Dc=1.630 Mg/m3,F(000)=6672,μ(MoKa)=1.865 mm-1,S=1.058,R=0.0271 and wR=0.0312 for 1870 observed reflections with I>2δ(I).The circular dichroism(CD)property of compound 1 was also investigated.
基金supported financially by the National Natural Science Foundation of Henan(162300410200)Key Scientific Research Projects of Higher Education of He’nan Province(17A150016)
文摘Biothiols such as cysteine(Cys),homocysteine(Hcy)and glutathione(GSH)act as critical roles in maintaining biological redox homeostasis,which is crucial for a plenty of physiological and pathological processes.Therefore,the detection of biothiols is very important and beneficial for many applications.Herein,we have designed and developed a new crystal dimethyl 4-(2,4-dinitrophenylsulfonyloxy)pyridine-2,6-dicarboxylate(P)with 2,4-dinitrobenzene-1-sulfonyl(DNBS)pendant for light-up and detection of biothiols(Cys was selected as the analyte model).The fluorescence"off-on"switch is triggered by the cleavage of DNBS unit by the interaction with biothiols via nucleophilic aromatic substitution reaction.The turn-on fluorescent probe exhibited excellent selectivity and sensitivity toward biothiols.
基金supported financially by National Natural Science Foundation of China (No. U1904183)Science Foundation for Excellent Youth Scholars of Henan (212300410061, 20HASTIT006)
文摘A microporous and robust bimetal-organic framework[Cd_(2)Ba(NH_(2)-BTB)_(2)]·2(DMA)·2(H_(2)O)(1)was constructed by mixing the heterometallic nodes and an tridentate carboxyl ligand with amino group,benefiting from the synergistic effect of active sites,exposed amino groups and ultramicroporous structure.This compound displays an extraordinary selectivity of CO_(2)/CH4 and C_(2)H_(2)/CH_(4)(16.7 and 146.3)at 298 K and 1 atm,which can exceed those of many reported MOFs under the same conditions.This work provides an important model to design metal-organic frameworks for the adsorption and separation of small gas molecules.
基金Supported by Supporting Plan for Scientific and Technological Innovative Talents in Universities of Henan Province(No.20HASTIT006)。
文摘A water-stable porous anionic metal-organic framework(MOF),[(CH3)2NH2][In(TCPP)4/3]n·(2DMF)n(3H2O)n(1,TCPP=1,1,2,2-tetra(4-carboxylbiphenyl)ethylene),was synthesized.Here,compound 1 showed extremely high sensitivity and selectivity to current general-purpose pesticide 2,6-dichloro-4-nitroaniline(DCN)in aqueous solution.The fluorescence intensity of compound 1 could be decreased as much as 80%by 6 mL DCN,and it was almost completely quenched only with 20 mL DCN.The results indicate that compound 1 can act as a fluorescent probe for DCN.
