Page 106 - Book of Abstracts 2020
P. 106
8 Biannual Conference on Chemistry - CHEM 08
th
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 105
