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      https://www.ias.ac.in/article/fulltext/jcsc/123/06/0819-0826

    • Keywords

       

      Coordination polymers; meso-substituted dipyrrins; heteroleptic; acetylacetonato; hexafluoroacetylacetonato; copper complexes.

    • Abstract

       

      The syntheses and characterizations of meso-substituted dipyrrins, 5-(4-imidazol-1-yl-phenyl)-dipyrromethene (4-impdpm), 5-(4-nitro-imidazol-1-yl-phenyl)-dipyrromethene, (4-nimpdpm), 5-(4-benzimidazol-1-yl-phenyl)-dipyrromethene (4-bimp-dpm) and heteroleptic complexes [Cu3(4-impdpm)2(hfacac)4] 1, [Cu(4-nimpdpm)(acac)] 2, [Cu(4-nimpdpm)(hfacac)] 3, [{Cu(4-bimpdpm)(acac)}$_n$] 4 and [{Cu(4-bimpdpm)-(hfacac)}$_n$] 5, imparting acetylacetonato (acac) and hexafluoroacetylacetonato (hfacac) groups as co-ligand have been described. The dipyrrins and complexes 1-5 have been characterized by elemental analyses and spectral (IR ESI-MS, NMR, electronic absorption and emission) studies. Crystal structures of 1, 3 and 4 have been authenticated by X-ray single crystal analyses. The reaction between 4-impdpm and Cu(hfacac)2 gave a trimetallic complex, under analogous conditions 4-nimpdpm and 4-bimpdpm reacted with Cu(acac)2 and Cu(hfacac)2·2H2O to afford mononuclear (2, 3) and 1D polymeric (4, 5) complexes.

    • Author Affiliations

       

      Rakesh Kumar Gupta1 Mahendra Yadav1 Rampal Pandey1 Daya Shankar Pandey1

      1. Department of Chemistry, Faculty of Science, Banaras Hindu University, Varanasi 221005, India
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