Ultrafast ligand exchange: detection of a pentacoordinate Ru(II) intermediate and product formation. Academic Article uri icon

abstract

  • The ultrafast kinetics of ligand exchange of cis-[Ru(bpy)(2)(CH(3)CN)(2)](2+) were measured in H(2)O and CH(3)CN. The formation of the (3)MLCT excited-state and a five-coordinate intermediate are observed in both solvents within 2 ps after excitation (310 nm, fwhm approximately 300 fs). The (3)MLCT excited-state undergoes vibrational cooling (5-6 ps), then decays to regenerate the ground-state with a lifetime of approximately 50 ps. In CH(3)CN, ligand recombination takes place in 28 ps, while the formation of cis-[Ru(bpy)(2)(CH(3)CN)(H(2)O)](2+) in H(2)O takes place with tau = 77 ps.

author list (cited authors)

  • Liu, Y., Turner, D. B., Singh, T. N., Angeles-Boza, A. M., Chouai, A., Dunbar, K. R., & Turro, C

complete list of authors

  • Liu, Yao||Turner, David B||Singh, Tanya N||Angeles-Boza, Alfredo M||Chouai, Abdellatif||Dunbar, Kim R||Turro, Claudia

publication date

  • January 1, 2009 11:11 AM