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X-ray crystallographic, spectroscopic, electrochemical and computational studies on axially ligation of ZnTPP with pyridine derivative anchored to aza-crown macrocyclic ligand
, Article Polyhedron ; Volume 133 , 2017 , Pages 419-432 ; 02775387 (ISSN) ; Shahhoseini, L ; Kubicki, M ; Sharif University of Technology
Abstract
The complexes of zinc tetraphenylporphyrin (ZnTPP) with the azacrown macrocycles bearing pyridine moiety (bp, 1p) as the axial ligand were synthesized and characterized by single-crystal X-ray diffraction, elemental analysis, IR, 1H and 13C NMR, fluorescence, UV–Vis, together with TD DFT calculations. Solution study by employing 1H NMR spectroscopy for ZnTPPbenz and ZnTPPH complexes elucidated that the pyridine moiety was bonded through the fifth-coordination site on the zinc metal atom. The observation of hypsochromic shifts of ca. 15 nm for Q(0,1) (the strongest emission) as well as ca. 15 nm for Q(0,0) (the second) bands testified to significant difference in the fluorescence of ZnTPPbenz...