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Thiocyanate mediated structural diversity in phenol based "end-off' compartmental ligand complexes of group 12 metal ions: Studies on their photophysical properties and phosphatase like activity
JAYDEEP ADHIKARY, PRATEETI CHAKRABORTY, SUGATA SAMANTA, ENNIO ZANGRANDO, SANJIB GHOSH,
Published in PERGAMON-ELSEVIER SCIENCE LTD
2017
Volume: 178
   
Pages: 114 - 124
Abstract
The reaction of a pentadentate compartmental ligand LH, namely 4-tert-Butyl-2,6-bis-[(2-pyridin-2-ylethylimino)-methyl]-phenol, with group 12 metal ions (Zn-II, Cd-II, Hg-II) followed by addition of NaSCN afforded one discrete dinuclear complex [Zn-2(L)(SCN)(3)](1), and two polymeric 1D species [Cd-2.5(L)(SCN)(3)(AcO)(n), (2) and [Hg-2(L)(SCN)(3)] (3). All the complexes have been structurally characterized by single crystal X-ray diffraction. The crystal structure of the complexes reveals different coordination modes of thiocyanate anion that affect the different topology detected in the compounds: the anions are mu(1)-NCS and mu(1,1)-NCS connected in complex 1, while l.5-NCS bridging mode is observed in 2, and mu(1)-SCN and mu(1)-NCS in 3. The polymeric Hg complex of the bicompartmental ligand system here reported is unprecedented. Detail study of their photophysical properties including the phosphorescence spectra at 77 K has been done. Phosphatase like activity of all the three complexes has been performed in DMSO-H2O medium and their activity follows the order of 1 > 2 >> 3. (C) 2017 Elsevier B.V. All rights reserved.
About the journal
JournalData powered by TypesetSPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
PublisherData powered by TypesetPERGAMON-ELSEVIER SCIENCE LTD
ISSN1386-1425