Page 111 - Book of Abstracts
P. 111
th
8 Biannual Conference on Chemistry - CHEM 08
Photoactivatable Carbon Monoxide Releasing Mn(I)(CO)3
Based Complexes: Spectroscopic and Density Functional
Theory Calculations
Rabaa M. Khaled, Nour T. Abdel-Ghani, and Ahmed M. Mansour
*
Chemistry Department, Cairo University, Faculty of Science, Gamma
Street, Giza, Cairo 12613, Egypt.
ABSTRACT
Reaction between bromopentacarbonyl manganese(I) and N,N-bidentate
Schiff-base ligands, bearing different electron-donating and electron
withdrawing groups R = OCH3, Cl and NO2, afforded octahedral
complexes of the general formula fac-[MnBr(CO)3(N-N)], which were
characterized by different spectral and analytical tools. The observed
electronic transitions were assigned with the aid of time-dependent
density functional theory calculations. The lowest energy transition was
assigned to metal-ligand charge transfer. The influence of the substituent
on the photophysical and photochemical properties was systemically
studied using UV/Vis. and IR spectroscopy. The dark stability and the
photo release process was investigated in two solvents of different
coordinating ability. The investigated carbon monoxide releasing
molecules (CORMs) are able to release CO upon the exposure to source
light in the range of 365–468 nm. Solution IR spectroscopy showed the
formation of intermediate Mn(CO)2 species.
BOOK OF ABSTRACTS CHEM 08 (2020) Page 110
