A novel redox-active bipyridinium ligand N-（3-carboxyphenyl）-4,4＇-bipyridinium chloride （HCPBPyC1） and its coordination polymer {[Cd2（CPBPy）2（BDC）（H2O）2Cl2]·6H2O}n 1 （H2BDC = benzene-1,4-dicarboxylic ...A novel redox-active bipyridinium ligand N-（3-carboxyphenyl）-4,4＇-bipyridinium chloride （HCPBPyC1） and its coordination polymer {[Cd2（CPBPy）2（BDC）（H2O）2Cl2]·6H2O}n 1 （H2BDC = benzene-1,4-dicarboxylic acid） were synthesized and characterized. Crystallographic data for 1： C42H44Cd2Cl2N4O16, Mr = 1156.51, monoclinic, space group C2/c, a = 21.046（3）, b = 11.0036（15）, c = 20.012（3）A, β = 98.694（8）°, Z = 4, V = 4581.1（11）A3, Dc = 1.677 g/cm^3, F（000） = 2280 and μ = 1.120 mm^-1. Complex 1 possesses a thick and undulated two-dimensional layer with （6,3） topology, which interpenetrates with two others （above and below） to extend into a three-dimensional supramolecular framework.展开更多
Compounds with visible-light-induced photoluminescence are particularly attractive in acting as the emitting components of light-emitting diodes and fluorescent probes for biological applications. A new complex [Zn(NC...Compounds with visible-light-induced photoluminescence are particularly attractive in acting as the emitting components of light-emitting diodes and fluorescent probes for biological applications. A new complex [Zn(NCS)_3(MQ)](MQ^+ = N-methyl-4,4?-bipyridinium) with an isolated molecular structure has been hydrothermally synthesized and characterized by single-crystal X-ray diffraction, elemental analysis, IR spectroscopy and solid-state photoluminescent determination. Crystal data: C_(14)H_(11)N_5S_3Zn, M_r = 410.83, monoclinic, space group P2_1/c, a = 8.809(5), b = 13.138(7), c = 15.580(9) ?, b = 104.433(10)°, V = 1746.2(17) ?~3, Z = 4, D–c = 1.563 g×cm^3, μ = 1.769 mm^(–1), F(000) = 832, the final R = 0.0376 and wR = 0.1243 for 2850 observed reflections with I > 2s(I). In the crystal structure, the zinc atom is tetrahedrally coordinated by one MQ+ ligand and three NCS– groups to yield a tetrahedral configuration. The bond length of Zn–NMQ is clearly shorter than those found in reported Zn(Ⅱ) complexes of 4,4?-bipy. The isolated units are joined by C–H···S interactions to generate a 2D hydrogen-bonding network. This compound displays visible light-induced photoluminescence, which originates from both intraligand charge-transfer of the MQ+ ligand and NCS~–→MQ^+ charge-transfer according to a density of states(DOS) calculation. Moreover, its emission band shows a clear blue shift compared with those of halide compounds.展开更多
Two naphthalene（NP） and bipyridinium（BIPY^2＋） alternately incorporated polymers P1 and P2 have been prepared through the formation of dynamic hydrazone bonds. The polymers formed NP–BIPY^2＋donor–acceptor inter...Two naphthalene（NP） and bipyridinium（BIPY^2＋） alternately incorporated polymers P1 and P2 have been prepared through the formation of dynamic hydrazone bonds. The polymers formed NP–BIPY^2＋donor–acceptor interaction-induced pleated secondary structure. Upon reducing the BIPY^2＋units to radical cation BIPY＋, intramolecular dimerization of the BIPY＋units induced the backbones to afford another pleated secondary structure. Adding electron-rich macrocyclic polyether bis-1,5-dinaphtho[38]crown-10 or electron-deficient cyclobis（paraquat-p-phenylene） cyclophane did not break the first foldamer by complexing the BIPY^2＋or NP units of the polymers, whereas the di（radical cationic）ring of the second cyclophane could break the second foldamer by forming threading complexes with the BIPY＋units of the polymers.展开更多
基金the National Natural Science Foundation of China (No. 20671090/5037206)the Key Project from CAS (No. KJCX2. YW.H01)
文摘A novel redox-active bipyridinium ligand N-（3-carboxyphenyl）-4,4＇-bipyridinium chloride （HCPBPyC1） and its coordination polymer {[Cd2（CPBPy）2（BDC）（H2O）2Cl2]·6H2O}n 1 （H2BDC = benzene-1,4-dicarboxylic acid） were synthesized and characterized. Crystallographic data for 1： C42H44Cd2Cl2N4O16, Mr = 1156.51, monoclinic, space group C2/c, a = 21.046（3）, b = 11.0036（15）, c = 20.012（3）A, β = 98.694（8）°, Z = 4, V = 4581.1（11）A3, Dc = 1.677 g/cm^3, F（000） = 2280 and μ = 1.120 mm^-1. Complex 1 possesses a thick and undulated two-dimensional layer with （6,3） topology, which interpenetrates with two others （above and below） to extend into a three-dimensional supramolecular framework.
基金supported by the National Natural Science Foundation of China(21221001,and 21471149)Key Research Program of Frontier Science,CAS(QYZDJ-SSW-SLH028)
文摘Compounds with visible-light-induced photoluminescence are particularly attractive in acting as the emitting components of light-emitting diodes and fluorescent probes for biological applications. A new complex [Zn(NCS)_3(MQ)](MQ^+ = N-methyl-4,4?-bipyridinium) with an isolated molecular structure has been hydrothermally synthesized and characterized by single-crystal X-ray diffraction, elemental analysis, IR spectroscopy and solid-state photoluminescent determination. Crystal data: C_(14)H_(11)N_5S_3Zn, M_r = 410.83, monoclinic, space group P2_1/c, a = 8.809(5), b = 13.138(7), c = 15.580(9) ?, b = 104.433(10)°, V = 1746.2(17) ?~3, Z = 4, D–c = 1.563 g×cm^3, μ = 1.769 mm^(–1), F(000) = 832, the final R = 0.0376 and wR = 0.1243 for 2850 observed reflections with I > 2s(I). In the crystal structure, the zinc atom is tetrahedrally coordinated by one MQ+ ligand and three NCS– groups to yield a tetrahedral configuration. The bond length of Zn–NMQ is clearly shorter than those found in reported Zn(Ⅱ) complexes of 4,4?-bipy. The isolated units are joined by C–H···S interactions to generate a 2D hydrogen-bonding network. This compound displays visible light-induced photoluminescence, which originates from both intraligand charge-transfer of the MQ+ ligand and NCS~–→MQ^+ charge-transfer according to a density of states(DOS) calculation. Moreover, its emission band shows a clear blue shift compared with those of halide compounds.
基金supported by The Ministry of Science and Technology of China (No. 2013CB834501)The Science and Technology Commission of Shanghai Municipality (No. 13M1400200)+1 种基金The Ministry of Education of China research fund for the doctoral programthe National Natural Science Foundation of China (Nos. 21432004 and 21472023)
文摘Two naphthalene（NP） and bipyridinium（BIPY^2＋） alternately incorporated polymers P1 and P2 have been prepared through the formation of dynamic hydrazone bonds. The polymers formed NP–BIPY^2＋donor–acceptor interaction-induced pleated secondary structure. Upon reducing the BIPY^2＋units to radical cation BIPY＋, intramolecular dimerization of the BIPY＋units induced the backbones to afford another pleated secondary structure. Adding electron-rich macrocyclic polyether bis-1,5-dinaphtho[38]crown-10 or electron-deficient cyclobis（paraquat-p-phenylene） cyclophane did not break the first foldamer by complexing the BIPY^2＋or NP units of the polymers, whereas the di（radical cationic）ring of the second cyclophane could break the second foldamer by forming threading complexes with the BIPY＋units of the polymers.
