A new Zn2＋ probe L2-Zn（L2=naphthofuran carbonylhydrazone derivant） was synthesized as a fluores- cence chemosensor for Cu2＋, by which Cuz＋ ion could be detected with high selectivity and sensitivity in a wide pH ...A new Zn2＋ probe L2-Zn（L2=naphthofuran carbonylhydrazone derivant） was synthesized as a fluores- cence chemosensor for Cu2＋, by which Cuz＋ ion could be detected with high selectivity and sensitivity in a wide pH range via a displacement ＂turn-off＂ signaling strategy. Whereas the coordination between Zn2＋ and L2 resulted in a considerable enhancement of typical luminescence of a naphthalofuran group in complex L2-Zn, the addition of Cu2＋ ion led to a dramatic decrease in the emission intensity of probe L2-Zn at about 503 nm（excitation at 423 nm）. The competitive fluorescent experiments showed that other metal ions, such as Hgz＋, Fe3＋, Ag＋, Ca2＋, Co2＋, Ni2＋, Cd2＋, Pb2＋, Zn2＋, Cr3＋ and Mg2＋ could not impact tile detection of Cu2＋. The detection limit of the novel probe L2-Zn for Cu2~ ion was as low as 2.3× 10 7 mol/L, which is far lower than the guideline value of 1.6× 10-5 mol/L of the United States Environmental Protection Agency.展开更多
One new Zn（Ⅱ） complex [Zn2（cptpy）2（tzba）（H2O）]·H2O（1, Hcptpy = 4-（4-carboxyphenyl）-2,2＇：4＇,4＇＇-terpyridine（Hcptpy）, H_2tzba = 4-（tetrazol-5-yl）benzenecarboxylic acid） has been synthesized an...One new Zn（Ⅱ） complex [Zn2（cptpy）2（tzba）（H2O）]·H2O（1, Hcptpy = 4-（4-carboxyphenyl）-2,2＇：4＇,4＇＇-terpyridine（Hcptpy）, H_2tzba = 4-（tetrazol-5-yl）benzenecarboxylic acid） has been synthesized and characterized by elemental analysis and single-crystal X-ray diffraction techniques. It is formulated as C52H36O8N10Zn2, crystallizes in monoclinic system, space group P21/c with α = 15.1599（13）, b = 28.083（2）, c = 10.9039（9） A, b = 97.517（8）o. V = 4602.3（6） A^3, Z = 4, Mr = 1059.68, Dc = 1.529 g/cm^3, F（000） = 2168 and μ = 1.112 mm^-1. The final R = 0.0831 and wR = 0.2143 for 8458 observed reflections with I 〉 2s（I）. The assembly of polyfunctional organic ligands Hcptpy and H_2tzba with Zn（II） atoms resulting in a rare example of double-edge ladders, which is further extended into a 3D supramolecular network via O–H…O/N hydrogen bonds. In addition, thermal gravimetric analysis（TGA） and PXRD patterns for 1 were studied. Photo luminescent property of 1 was also investigated.展开更多
基金the National Natural Science Foundation of China（Nos.21064006, 21262032, 21161018）.
文摘A new Zn2＋ probe L2-Zn（L2=naphthofuran carbonylhydrazone derivant） was synthesized as a fluores- cence chemosensor for Cu2＋, by which Cuz＋ ion could be detected with high selectivity and sensitivity in a wide pH range via a displacement ＂turn-off＂ signaling strategy. Whereas the coordination between Zn2＋ and L2 resulted in a considerable enhancement of typical luminescence of a naphthalofuran group in complex L2-Zn, the addition of Cu2＋ ion led to a dramatic decrease in the emission intensity of probe L2-Zn at about 503 nm（excitation at 423 nm）. The competitive fluorescent experiments showed that other metal ions, such as Hgz＋, Fe3＋, Ag＋, Ca2＋, Co2＋, Ni2＋, Cd2＋, Pb2＋, Zn2＋, Cr3＋ and Mg2＋ could not impact tile detection of Cu2＋. The detection limit of the novel probe L2-Zn for Cu2~ ion was as low as 2.3× 10 7 mol/L, which is far lower than the guideline value of 1.6× 10-5 mol/L of the United States Environmental Protection Agency.
基金supported by the National Natural Science Foundation of China(Nos.21273101 and 21302082)Foundation for Science&Technology Innovation Talents in Henan province(Nos.2014HASTIT014 and 164100510012)+1 种基金Tackle Key Problem of Science and Technology Project of Henan Province,(No.14210 231 0483)Ministry of Science and Technology of China(973 Project,No.2014CB660804)
文摘One new Zn（Ⅱ） complex [Zn2（cptpy）2（tzba）（H2O）]·H2O（1, Hcptpy = 4-（4-carboxyphenyl）-2,2＇：4＇,4＇＇-terpyridine（Hcptpy）, H_2tzba = 4-（tetrazol-5-yl）benzenecarboxylic acid） has been synthesized and characterized by elemental analysis and single-crystal X-ray diffraction techniques. It is formulated as C52H36O8N10Zn2, crystallizes in monoclinic system, space group P21/c with α = 15.1599（13）, b = 28.083（2）, c = 10.9039（9） A, b = 97.517（8）o. V = 4602.3（6） A^3, Z = 4, Mr = 1059.68, Dc = 1.529 g/cm^3, F（000） = 2168 and μ = 1.112 mm^-1. The final R = 0.0831 and wR = 0.2143 for 8458 observed reflections with I 〉 2s（I）. The assembly of polyfunctional organic ligands Hcptpy and H_2tzba with Zn（II） atoms resulting in a rare example of double-edge ladders, which is further extended into a 3D supramolecular network via O–H…O/N hydrogen bonds. In addition, thermal gravimetric analysis（TGA） and PXRD patterns for 1 were studied. Photo luminescent property of 1 was also investigated.
