Abstract
A new series of hexa-coordinated Ru(II) complexes of the type [Ru(L)(phen)2]X (1a–d) and [Ru(L)(bipy)2]X (2a–d) (where phen = 1,10-phenanthroline, bipy = 2,2′-bipyridine, X = NO3, BF4, ClO4, PF6) have been prepared by the reaction of (E)-2-(((5-((4-methoxyphenyl)ethynyl)pyridin-2-yl)imino)methyl)-4-((4-nitrophenyl)ethynyl)phenol (L) with [Ru(phen)2]Cl2·2H2O and [Ru(bipy)2]Cl2·2H2O. The complexes were characterized by physico-chemical and spectroscopic methods. All complexes are 1:1 conducting and diamagnetic in nature. In acetonitrile solution, the complexes displayed one reversible Ru(II)–Ru(III) oxidation couple and one irreversible Ru(III)–Ru(IV) oxidation and are sensitive to π-acidic character of phen and bipy ligands. The complexes show room-temperature luminescence originated from the lowest energy metal-to-ligand charge transfer excited state and are sensitive to difference in size of the counter anions. All the complexes displayed second harmonic generation by Kurtz-powder technique indicating their potential for the application as a useful NLO material.
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One of the authors (ABP-D) is thankful to UGC-BSR-SRF, New Delhi, India, for awarding UGC research fellowship in science for meritorious students.
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Patil-Deshmukh, A.B., Mohite, S.S. & Chavan, S.S. Ruthenium(II)-2, 2′-bipyridine/1, 10-phenanthroline complexes incorporating (E)-2-(((5-((4-methoxyphenyl)ethynyl)pyridin-2-yl)imino)methyl)-4-((4-nitro phenyl)ethynyl)phenol as a ligand. Transit Met Chem 45, 333–342 (2020). https://doi.org/10.1007/s11243-020-00384-x
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DOI: https://doi.org/10.1007/s11243-020-00384-x