A new terbium(III) metal-organic framework [Tb(HL)(H2O)](Tb L) based on a new synthetic ligand 9-(2,6-dicarboxy-pyridin-4-yl)-9 H-carbazole-3,6-dicarboxylic acid(H4 L) has been synthesized under solvothermal condition...A new terbium(III) metal-organic framework [Tb(HL)(H2O)](Tb L) based on a new synthetic ligand 9-(2,6-dicarboxy-pyridin-4-yl)-9 H-carbazole-3,6-dicarboxylic acid(H4 L) has been synthesized under solvothermal conditions. Its structure was determined by single-crystal X-ray diffraction analysis, and further characterized by powder X-ray diffraction analysis and IR spectra. The title complex crystallizes in trigonal space group P3212 with a = b = 13.6491(11), c = 32.345(3) ?, γ = 120°, V = 5218.5(10) ?~3, C(42)H(20)N4O(17)Tb2, Mr = 1170.46, Dc = 1.117 g/cm^3, μ(Mo Kα) = 2.065 mm^(-1), F(000) = 1698, GOF = 1.054, Z = 3, the final R = 0.0384 and wR = 0.0771 for 5223 observed reflections(I > 2s(I)). In Tb L, the tri-bridged binuclear Tb2 units are bibridged by two carbazole-3,6-dicarboxylate moieties to lead to the homochiral parallel arranged helical chains, which are further connected by 2,6-pyridinedicarboxylate moieties to produce the chiral neutral 3 D framework. There are there kinds of 1 D channels in the framework with the channel space occupying 53.3% of the total volume. TbL exhibits intense characteristic green emission of Tb^(3+) ions.展开更多
By solvothermal reaction of Cd(II)with organic ligand N,N’-bis(3,5-dicarboxylphenyl)-thiophene-2,5-dicarboxamide(H_(4)L),a water-stable complex[Cd_(4)(H_(2)L)_(4)(H_(2)O)_(10)]·2CH_(3)OH·8H_(2)O·4DMF(1...By solvothermal reaction of Cd(II)with organic ligand N,N’-bis(3,5-dicarboxylphenyl)-thiophene-2,5-dicarboxamide(H_(4)L),a water-stable complex[Cd_(4)(H_(2)L)_(4)(H_(2)O)_(10)]·2CH_(3)OH·8H_(2)O·4DMF(1,C_(102)H_(120)Cd_(4)N_(12)O_(64)S_(4))has been successfully synthetized(DMF=N,N-dimethylformamide).1 crystallizes in the triclinic space group of P1 with a=11.815(7),b=16.209(9),c=16.742(9)Å,α=82.224(13)°,β=76.741(13)°,γ=70.313(12)°,V=2932(3)Å^(3),M_(r)=3115.93,Z=1,F(000)=1584,D_(c)=1.765 Mg/cm^(3),μ=0.901 mm^(-1),GOOF=1.101,the final R=0.0391 and wR=0.1297 for 9007 observed reflections(I>2σ(I)).1 is a tetranuclear Cd(II)bicyclic complex with strong ligand-based blue emission and can stably exist in aqueous solutions over the pH range of 2~11.1exhibits high sensitivity,selectivity and anti-interference capability for picric acid(PA)detection in aqueous solution by luminescent quenching.The value of quenching constant(K_(sv))is 3.2×10^(4)M^(-1) within the PAconcentration range of 0~40μM and the detection limit is 6.89×10^(-7) M.Lastly,we went into depth on possible mechanism of the luminescent quenching.展开更多
基金supported by the National Natural Science Foundation of China(21973047)。
文摘A new terbium(III) metal-organic framework [Tb(HL)(H2O)](Tb L) based on a new synthetic ligand 9-(2,6-dicarboxy-pyridin-4-yl)-9 H-carbazole-3,6-dicarboxylic acid(H4 L) has been synthesized under solvothermal conditions. Its structure was determined by single-crystal X-ray diffraction analysis, and further characterized by powder X-ray diffraction analysis and IR spectra. The title complex crystallizes in trigonal space group P3212 with a = b = 13.6491(11), c = 32.345(3) ?, γ = 120°, V = 5218.5(10) ?~3, C(42)H(20)N4O(17)Tb2, Mr = 1170.46, Dc = 1.117 g/cm^3, μ(Mo Kα) = 2.065 mm^(-1), F(000) = 1698, GOF = 1.054, Z = 3, the final R = 0.0384 and wR = 0.0771 for 5223 observed reflections(I > 2s(I)). In Tb L, the tri-bridged binuclear Tb2 units are bibridged by two carbazole-3,6-dicarboxylate moieties to lead to the homochiral parallel arranged helical chains, which are further connected by 2,6-pyridinedicarboxylate moieties to produce the chiral neutral 3 D framework. There are there kinds of 1 D channels in the framework with the channel space occupying 53.3% of the total volume. TbL exhibits intense characteristic green emission of Tb^(3+) ions.
基金supported by the National Natural Science Foundation of China(21973047)Jiangsu Province Double Innovation Talent Program(090300014001)。
文摘By solvothermal reaction of Cd(II)with organic ligand N,N’-bis(3,5-dicarboxylphenyl)-thiophene-2,5-dicarboxamide(H_(4)L),a water-stable complex[Cd_(4)(H_(2)L)_(4)(H_(2)O)_(10)]·2CH_(3)OH·8H_(2)O·4DMF(1,C_(102)H_(120)Cd_(4)N_(12)O_(64)S_(4))has been successfully synthetized(DMF=N,N-dimethylformamide).1 crystallizes in the triclinic space group of P1 with a=11.815(7),b=16.209(9),c=16.742(9)Å,α=82.224(13)°,β=76.741(13)°,γ=70.313(12)°,V=2932(3)Å^(3),M_(r)=3115.93,Z=1,F(000)=1584,D_(c)=1.765 Mg/cm^(3),μ=0.901 mm^(-1),GOOF=1.101,the final R=0.0391 and wR=0.1297 for 9007 observed reflections(I>2σ(I)).1 is a tetranuclear Cd(II)bicyclic complex with strong ligand-based blue emission and can stably exist in aqueous solutions over the pH range of 2~11.1exhibits high sensitivity,selectivity and anti-interference capability for picric acid(PA)detection in aqueous solution by luminescent quenching.The value of quenching constant(K_(sv))is 3.2×10^(4)M^(-1) within the PAconcentration range of 0~40μM and the detection limit is 6.89×10^(-7) M.Lastly,we went into depth on possible mechanism of the luminescent quenching.
