Chemically and electrochemically induced interconversion between five one-stranded complexes of copper(II) and the respective double-stranded helicates of copper(I) bearing the ligand 6,6′′′-dimethyl-2,2′:6′,2′′:6′′,2′′′-quaterpyridine (L) culminated in different luminescence properties. Five new mononuclear complexes of copper(II) bearing the ligand L {[CuIILCl2] (1), [CuIIL(ClO4)2] (2), [CuIIL(NO3)2] (3), [CuIIL(CF3SO3)2] (4), and [CuIIL(BF4)2] (5)} have been reduced in two different ways: The first, by using metallic copper, gave [CuI 2L2][CuIICl4] (1a), [CuI 2L2][CuII(ClO4)4] (2a), and [CuI 2L2][CuII(NO3)4] (3a), and the second, by using ascorbic acid, led to [CuI 2L2(CF3SO3)2] (4a) and [CuI 2L2(BF4)2] (5a). The conversion of the helicates into mononuclear complexes can be implemented by oxidation with hydrogen peroxide or by the displacement of CuIby CuIIions
Molecular Switching of Copper Complexes with Quaterpyridine
CONSIGLIO, GIUSEPPE;
2017-01-01
Abstract
Chemically and electrochemically induced interconversion between five one-stranded complexes of copper(II) and the respective double-stranded helicates of copper(I) bearing the ligand 6,6′′′-dimethyl-2,2′:6′,2′′:6′′,2′′′-quaterpyridine (L) culminated in different luminescence properties. Five new mononuclear complexes of copper(II) bearing the ligand L {[CuIILCl2] (1), [CuIIL(ClO4)2] (2), [CuIIL(NO3)2] (3), [CuIIL(CF3SO3)2] (4), and [CuIIL(BF4)2] (5)} have been reduced in two different ways: The first, by using metallic copper, gave [CuI 2L2][CuIICl4] (1a), [CuI 2L2][CuII(ClO4)4] (2a), and [CuI 2L2][CuII(NO3)4] (3a), and the second, by using ascorbic acid, led to [CuI 2L2(CF3SO3)2] (4a) and [CuI 2L2(BF4)2] (5a). The conversion of the helicates into mononuclear complexes can be implemented by oxidation with hydrogen peroxide or by the displacement of CuIby CuIIionsFile | Dimensione | Formato | |
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