Synthesis and characterization of three new photo-luminescent cadmium(II) complexes with azide: Variation in molecular structures with changes in the denticity of blocking ligands

Add time:08/02/2019    Source:sciencedirect.com

Three new cadmium(II) complexes, [Cd(dede)(μ-1,3-N3)(μ-1,1-N3)]n (1), [{Cd3(L1)2(μ-1,1-N3)4(CH3OH)2}·2CH3OH·2H2O]n (2) and [(CdL2)3(μ-1,1,1-OH)][(CdL2)3(μ-1,1,1-N3)](ClO4)4·H2O (3) {dede = N,N-diethyl-1,2-diaminoethane, HL1 = 2-(2-((diethylamino)ethylimino)methyl)phenol and HL2 = 2-(2-((diethylamino)ethylimino)methyl)-6-methoxyphenol, have been prepared and characterized by elemental and spectral analysis. Structures of complexes have been confirmed by single crystal X-ray diffraction studies. Complex 1 contains alternating double μ-1,1- and μ-1,3-azide bridges and creates two-dimensional sheet with 63-hcb topology. Complex 2 consists of μ-1,1-azide bridged chain and forms three-dimensional architecture via hydrogen bonding interactions. Complex 3 has a partial cubane [Cd3O4] core consisting of trinuclear cadmium(II) moieties. The variation in the denticity of ligands causes changes in molecular and crystalline architectures of the complexes. All the three complexes show fluorescence.

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