Abstract
Time-resolved resonance Raman spectroscopy has been employed to examine the location of the promoted electron in the metal-to-ligand charge-transfer (MLCT) excited state of Ru(bpy)_2(dpphen)^(2+) (bpy) = 2,2'-bipyridine; dpphen = 4,7-diphenyl-1,10-phenanthroline). Variations in the environment about Ru(bpy)_2(dpphen)^(2+) shift the localization of charge in the MLCT excited state from bpy in neutral micelles (Brij 35) to dpphen in the presence of DNA and anionic surfactants (C_(12)H_(25)OSO_3Na, C_(10)H_(23)OSO_3Na, and C_8H_(21)OSO_3Na), whereas in water the electron is localized on both ligands. The shifts in the electronic absorption spectrum and the dependence of the ground-state resonance Raman (rR) signal with excitation wavelengths coincident with the high- and low-energy sides of the MLCT absorption band are consistent with a lowering of the energy of the Ru(II)-dpphen transition with respect to that of bpy in anionic micelles.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
