Sk Hafijur Rahaman, Rajarshi Ghosh, T. Lu
Aug 25, 2005
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0
Influential Citations
74
Citations
Quality indicators
Journal
Polyhedron
Abstract
Abstract Copper perchlorate hexahydrate on reaction with the chelating ligands, N,N′-(bis(pyridin-2-yl)alkylidene)propane-1,3-diamine (bpap) [(py)(R)C N–(CH2)3–N C(R)(py) where py = pyridine; R = H, (bpfp); R = Me, (bpmp); R = C6H5, (bpbp)] and NaN3/NH4NCS in a 1:1:1 mole ratio forms the complexes [Cu(bpap)(N3/NCS)]ClO4 (1a–3b), while cadmium perchlorate hexahydrate/cadmium nitrate tetrahydrate in a 1:1:2 mole ratio produces [Cd(bpap)(N3/NCS)2] (4a–6b). Elemental, spectral, electrochemical and other physicochemical results characterize the complexes. Single crystal X-ray diffraction studies confirm the structure of two representative members, [Cu(bpbp)(N3)]ClO4 (3a) and [Cd(bpbp)(NCS)2] (6b). The complexes of 1a–3b are reduced to [Cu(bpbp)2]ClO4 by ascorbic acid. However, air oxidation of [Cu(bpbp)2]ClO4 in the presence of N3/NCS produces Cu(bpap)(N3/NCS)]ClO4. All the complexes display intraligand 1(π–π*) fluorescence and intraligand 3(π–π*) phosphorescence in glassy solutions (MeOH at 77 K).