Open AccessSynthesis of Fluorescent Rhodium(II) and Iridium(II) Complexes Promoted by 2,6-Bistetrazolate Pyridine Ligand
Author(s) -
Rayees Ahmad Malik,
Amit Chattree
Publication year - 2019
Publication title -
asian journal of chemistry/asian journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.145
H-Index - 34
eISSN - 0975-427X
pISSN - 0970-7077
DOI - 10.14233/ajchem.2020.22396
Subject(s) - iridium , chemistry , rhodium , ligand (biochemistry) , pyridine , fluorescence , photochemistry , stereochemistry , medicinal chemistry , catalysis , organic chemistry , biochemistry , physics , receptor , quantum mechanics
Tridentate N-donor ligand 2,6-bistetrazolate pyridine (H2pytz) has been prepared from2,6-pyridinedicarbonitrile and used for coordination with transition metals [M(pytz)2](NHEt3)2, (M =Rh, Ir). The structure of Rh and Ir complexes was determined by UV, FT-IR, 1H NMR, XRD and elemental analysis. Moreover, the absorption spectra of complexes were shifted towards the visible region (367.2 nm for Rh and 370.8 nm for Ir). The π-excessive, lone pair nitrogen donors and extended unsaturation of ligand triggers the visible fluorescence spectra upto 528.5 nm for rhodium complex and 557.5 nm for iridium complex. The antibacterial activity results revealed that S. aureus and E. colishowed maximum response followed by K. pneumoniae and B. cereus, respectively. The maximum zone of inhibition of complexes was observed at 6 mg/mL concentration viz. S. aureus, 15.0 ± 1.15 mm for rhodium complex and E. coli, 14.6 ± 1.15 mm for iridium complex. Therefore, 2,6-bistetrazolate pyridine (H2pytz) ligand tune the photo-physical properties of the complexes as well as their applications in the biological fields.