ELECTROSPRAY-IONIZATION OF DIVALENT TRANSITION-METAL ION BIPYRIDINE COMPLEXES - SPECTROSCOPIC EVIDENCE FOR PREPARATION OF SOLUTION ANALOGS IN THE GAS-PHASE
Td. Burns et al., ELECTROSPRAY-IONIZATION OF DIVALENT TRANSITION-METAL ION BIPYRIDINE COMPLEXES - SPECTROSCOPIC EVIDENCE FOR PREPARATION OF SOLUTION ANALOGS IN THE GAS-PHASE, Chemical physics letters, 258(5-6), 1996, pp. 669-679
Laser photofragmentation mass spectrometry provides die first spectros
copic evidence that electrospray ionization (ESI) produces gas-phase c
lusters containing transition metal ion complexes analogous to those f
ound in solution, In solution, the tris(2,2'-bipyridyl)iron(II) and ru
thenium(II) coordination complexes exhibit strong metal-to-ligand char
ge transfer (MLCT) absorption bands in the visible. The characteristic
MLCT absorption bands are intact in gas-phase methanolic clusters con
taining these complexes, indicating that the metal oxidation state is
preserved during ESI. Comparison of the ionic species produced by ESI
and other ionization/volatilization techniques offers some insight on
stabilization of the + 2 charge in these gas-phase systems.