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2, 6‐Bis(( E )‐((5‐benzoyl‐2‐thioxo‐4‐phenylpyrimidin‐1( 2H )‐yl)imino)methyl)‐4‐(methyl)phenol and its Metal(II) Complexes: Synthesis, Spectroscopy, Biological Activity, and Photoluminescence Features
Author(s) -
Gulcan Mehmet,
Zengin Hüseyin,
Çelebi Metin,
Sönmez Mehmet,
Berber İsmet
Publication year - 2013
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201300224
Subject(s) - ligand (biochemistry) , photoluminescence , metal , chemistry , schiff base , metal ions in aqueous solution , stereochemistry , nuclear chemistry , materials science , organic chemistry , biochemistry , receptor , optoelectronics
Abstract The preparation, characterization, magnetic measurements, antimicrobial activity, and photoluminescence properties of a number of metal complexes with a Schiff base ligand derived from 2, 6‐diformyl‐4‐methylphenol and 1‐amino‐5‐benzoyl‐4‐phenyl‐1 H ‐pyrimidine‐2‐thione are reported herein. UV/Vis spectra and magnetic measurements infer square planar stereochemistry for Pd II and Pt II complexes, and octahedral arrangement for the other metal complexes. The compounds results in intense emission (where λ max = 402 nm) upon irradiation by UV light. The photoluminescence quantum yields and long excited‐state lifetimes of the ligand and its complexes were calculated as 42 % and 3.94 ns, respectively. The photoluminescence intensities and quantum yields of metal complexes changed upon complexation with various metal ions. The ligand and its complexes are of interest as organic emitting materials for electroluminescent devices. The complexes were additionally evaluated for in vitro the antimicrobial activity against bacterial and fungal strains. While Cu II , Co II , and Pt II complexes have good antifungal efficiency against yeast (MICs, 80 μg · mL –1 ), only the complex [Cu(L)(AcO)] · 4H 2 O had effective and selective antimicrobial activity against all tested microorganisms with MIC values in the range of 40–80 μg · mL –1 , except for E . coli ATCC 4230. This study suggests that the complex [Cu(L)(AcO)] · 4H 2 O may be a new potential antimicrobial substance towards bacteria and fungi.