THE INFRARED PHOTODISSOCIATION SPECTRA OF FE-N(CH3OH)(M) COMPLEXES AND THEIR DEUTERATED ANALOGS NEAR 10-MU

The infrared photodissociation spectra of Fe-n(CH3OH)(m), Fe-n(CH3OD)( m), Fe-n(CD3OH)(m), and Fe-n(CD3OD)(m) (n = 5-15; m = 1,2) have been r ecorded from 920-1090 cm(-1). Analysis of the spectral features indica tes that in all cases, molecularly adsorbed methanol is the absorbing chromophore, with no evidence of methoxy formation. The observed frequ encies for the C-O stretching vibration and other vibrational modes ar e shifted similar to 40 cm(-1) to the red of the corresponding fundame ntals of gas-phase methanol. The spectral shifts and thus the magnitud e of the cluster-methanol interaction are observed to be independent o f iron cluster size over the size range studied, implying an insensiti vity of the interaction to the underlying cluster structure. (C) 1996 American Institute of Physics.