Aragoni M Carla, Arca Massimiliano, Bencini Andrea, Blake Alexander J, Caltagirone Claudia, De Filippo Greta, Devillanova Francesco A, Garau Alessandra, Gelbrich Thomas, Hursthouse Michael B, Isaia Francesco, Lippolis Vito, Mameli Marta, Mariani Palma, Valtancoli Barbara, Wilson Claire
Dipartimento di Chimica Inorganica ed Analitica, Università degli Studi di Cagliari, S.S. 554 Bivio per Sestu, 09042 Monserrato, Italy.
Inorg Chem. 2007 May 28;46(11):4548-59. doi: 10.1021/ic070169e. Epub 2007 Apr 18.
Two new fluorescent chemosensors for metal ions have been synthesized and characterized, and their photophysical properties have been explored; they are the macrocycles 5-(2-quinolinylmethyl)-2,8-dithia-5-aza-2,6-pyridinophane (L5) and 5-(5-chloro-8-hydroxyquinolinylmethyl)-2,8-dithia-5-aza-2,6-pyridinophane (L6). Both systems have a pyridyl-thioether-containing 12-membered macrocycle as a binding site. The coordination properties of these two ligands toward CuII, ZnII, CdII, HgII, and PbII have been studied in MeCN/H2O (1:1 v/v) and MeCN solutions and in the solid state. The stoichiometry of the species formed at 25 degrees C have been determined from absorption, fluorescence, and potentiometric titrations. The complexes CuL5(2).1/2MeCN, ZnL5(H2O)2, HgL5(MeCN)2, [PbL5(ClO4)2], Cu3(5-Cl-8-HDQH-1)(L6H-1)2(3).7.5H2O (HDQ=hydroxyquinoline), and Cu(L6)2(2).2MeNO2 have also been characterized by X-ray crystallography. A specific CHEF-type response of L5 and L6 to the presence of ZnII and CdII, respectively, has been observed at about pH 7.0 in MeCN/H2O (1:1 v/v) solutions.
已合成并表征了两种用于金属离子的新型荧光化学传感器，并对其光物理性质进行了研究；它们是大环化合物5-(2-喹啉基甲基)-2,8-二硫杂-5-氮杂-2,6-吡啶并环十二烷（L5）和5-(5-氯-8-羟基喹啉基甲基)-2,8-二硫杂-5-氮杂-2,6-吡啶并环十二烷（L6）。两个体系均具有含吡啶基硫醚的12元大环作为结合位点。在乙腈/水（1:1 v/v）和乙腈溶液以及固态中研究了这两种配体对CuII、ZnII、CdII、HgII和PbII的配位性质。通过吸收、荧光和电位滴定法确定了在25℃下形成的物种的化学计量比。配合物CuL5(2).1/2MeCN、ZnL5(H2O)2、HgL5(MeCN)2、[PbL5(ClO4)2]、Cu3(5-Cl-8-HDQH-1)(L6H-1)2(3).7.5H2O（HDQ = 羟基喹啉）和Cu(L6)2(2).2MeNO2也已通过X射线晶体学进行了表征。在乙腈/水（1:1 v/v）溶液中，在约pH 7.0时分别观察到L5和L6对ZnII和CdII的存在具有特定的CHEF型响应。
