One-dimensional cyanide-bridged bimetallic coordination polymer [CuL(H 2O) 2] n [(CuL)·(μ-CN) 2Fe(CN) 4] 2n ·(H 2O) 2n was synthesized and structurally characterized. The coordination polymer crystallizes i...One-dimensional cyanide-bridged bimetallic coordination polymer [CuL(H 2O) 2] n [(CuL)·(μ-CN) 2Fe(CN) 4] 2n ·(H 2O) 2n was synthesized and structurally characterized. The coordination polymer crystallizes in a monoclinic system of the space group C2/c with a=2.983 1(5) nm, b=1.527 4(3) nm, c= 1.725 3(4) nm, β=107.68(2)°, V=7.490(3) nm3, Z=8, D c=1.382 g/cm3, F(000)=3 260, R=0.059 3, wR 2=0.132 3, S=0.885. The one-dimensional zigzag chain extents through Cu—CN—Fe—CN—Cu linkages. The adjacent two polymer chains are linked by the O—H……NC hydrogen bonding between [CuL(H 2O) 2] 2+ and [Fe(CN) 6] 3- ions to form hydrophilic channels in which water molecules are included.展开更多
Laoying Tea as a famous traditional drinking tea is used in southern China. In Guizhou, Litsea coreana Lévl. var. lanuginose (Migo) Yang et P. H. Huang and Actinodaphne cupularis (Hemsl.) Gamble are used as its o...Laoying Tea as a famous traditional drinking tea is used in southern China. In Guizhou, Litsea coreana Lévl. var. lanuginose (Migo) Yang et P. H. Huang and Actinodaphne cupularis (Hemsl.) Gamble are used as its original materials. Comparing with the green tea the chemical compositions and contents of leaves in two original species of Laoying Tea, which were proteins, amino acids, vitamins, sugar, polyphenol, flavonoid et al, had been analyzed, no detectable amount of caffeine was found, nutrient constituents were plentiful.展开更多
The macrocyclic ligand(L) and its dinuclear copper(Ⅱ) and zinc(Ⅱ) complexes have been synthesized. The crystal structure of [Cu 2L(Him) 2](ClO 4) 4·2H 2O has been determined by single crystal X ray diffraction....The macrocyclic ligand(L) and its dinuclear copper(Ⅱ) and zinc(Ⅱ) complexes have been synthesized. The crystal structure of [Cu 2L(Him) 2](ClO 4) 4·2H 2O has been determined by single crystal X ray diffraction. It crystallizes in a monoclinic system, the space group P2 1/c , a =0.951 2(2) nm, b =2.010 4(4) nm, c =1.202 5(2) nm, β =98.89(3)°, V =2.271 9(8) nm 3, Z=2, D c=1.599 Mg/m 3 , F (000) = 876 , R =0.059 1, wR =0.173 3, GOF(F)=1.009. The copper(Ⅱ) atom is five coordinated with four nitrogen atoms of the macrocyclic ligand and one nitrogen atom of imidazole. The stepwise stability constants of the 1∶1 and 2∶1 molar ratios of Cu to L and Zn to L complexes were determined by potentiometric titration in KCl supporting electrolyte(0.100 mol/L) at 25 ℃. The results indicated that zinc(Ⅱ) ion can form hydroxide bridged dinuclear complex [Zn 2(OH)L] 3+ , while the copper(Ⅱ) ion can only form dinuclear complex 3+ with macrocyclic ligand.展开更多
Linear sweep voltammetry has been used to study the electrochemical behavior of tran-sition metal structural units Co(PPh3)2Cl2 and Co(PPh3)3Cl in DMF solution with 0.1mol L-1Et4NClO4 on Pt electrode. The results sugg...Linear sweep voltammetry has been used to study the electrochemical behavior of tran-sition metal structural units Co(PPh3)2Cl2 and Co(PPh3)3Cl in DMF solution with 0.1mol L-1Et4NClO4 on Pt electrode. The results suggest that Co(Ⅱ) is reduced to Co(Ⅰ) at the first stepand the process is reversible. The Process of Co(Ⅰ) reduced to Co(0) subsequently is irreversible.The Co(Ⅰ) is not stable in solution and is oxidized easily to Co(Ⅱ).展开更多
文摘One-dimensional cyanide-bridged bimetallic coordination polymer [CuL(H 2O) 2] n [(CuL)·(μ-CN) 2Fe(CN) 4] 2n ·(H 2O) 2n was synthesized and structurally characterized. The coordination polymer crystallizes in a monoclinic system of the space group C2/c with a=2.983 1(5) nm, b=1.527 4(3) nm, c= 1.725 3(4) nm, β=107.68(2)°, V=7.490(3) nm3, Z=8, D c=1.382 g/cm3, F(000)=3 260, R=0.059 3, wR 2=0.132 3, S=0.885. The one-dimensional zigzag chain extents through Cu—CN—Fe—CN—Cu linkages. The adjacent two polymer chains are linked by the O—H……NC hydrogen bonding between [CuL(H 2O) 2] 2+ and [Fe(CN) 6] 3- ions to form hydrophilic channels in which water molecules are included.
文摘Laoying Tea as a famous traditional drinking tea is used in southern China. In Guizhou, Litsea coreana Lévl. var. lanuginose (Migo) Yang et P. H. Huang and Actinodaphne cupularis (Hemsl.) Gamble are used as its original materials. Comparing with the green tea the chemical compositions and contents of leaves in two original species of Laoying Tea, which were proteins, amino acids, vitamins, sugar, polyphenol, flavonoid et al, had been analyzed, no detectable amount of caffeine was found, nutrient constituents were plentiful.
文摘The macrocyclic ligand(L) and its dinuclear copper(Ⅱ) and zinc(Ⅱ) complexes have been synthesized. The crystal structure of [Cu 2L(Him) 2](ClO 4) 4·2H 2O has been determined by single crystal X ray diffraction. It crystallizes in a monoclinic system, the space group P2 1/c , a =0.951 2(2) nm, b =2.010 4(4) nm, c =1.202 5(2) nm, β =98.89(3)°, V =2.271 9(8) nm 3, Z=2, D c=1.599 Mg/m 3 , F (000) = 876 , R =0.059 1, wR =0.173 3, GOF(F)=1.009. The copper(Ⅱ) atom is five coordinated with four nitrogen atoms of the macrocyclic ligand and one nitrogen atom of imidazole. The stepwise stability constants of the 1∶1 and 2∶1 molar ratios of Cu to L and Zn to L complexes were determined by potentiometric titration in KCl supporting electrolyte(0.100 mol/L) at 25 ℃. The results indicated that zinc(Ⅱ) ion can form hydroxide bridged dinuclear complex [Zn 2(OH)L] 3+ , while the copper(Ⅱ) ion can only form dinuclear complex 3+ with macrocyclic ligand.
文摘Linear sweep voltammetry has been used to study the electrochemical behavior of tran-sition metal structural units Co(PPh3)2Cl2 and Co(PPh3)3Cl in DMF solution with 0.1mol L-1Et4NClO4 on Pt electrode. The results suggest that Co(Ⅱ) is reduced to Co(Ⅰ) at the first stepand the process is reversible. The Process of Co(Ⅰ) reduced to Co(0) subsequently is irreversible.The Co(Ⅰ) is not stable in solution and is oxidized easily to Co(Ⅱ).
