| 摘要 |
Chemicals which make not only a dark red−orangish red change of color but also a near infrared−red change of luminescence via reversible adsorption/desorption of vapor of acetonitrile or ethanol,and therefore permit the observation of on−off change of visually effective luminescence and thus are useful as highly sensitive sensors.The chemicals are binuclear platinum(II)complexes of the following general formula:[Pt2(L)2(bpy)2]X2 or[Pt2(L)2(bpy)2]Y(wherein L is a bridging ligand selected from among 2−pyridinethiol anion,2−quinolinethiol anion,8−quinoline−thiol anion and so on;bpy is 2,2−bipyridine;X is a monovalent anion;and Y is a bivalent anion),characterized by taking a syn form wherein the two bridging ligands(L)coordinate to one platinum ion at their respective sulfur atoms and to the other platinum ion at their respective nitrogen atoms.
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