Ultrafast spectroscopy of arylchlorodiazirines: Hammett correlations of excited state lifetimes.
Experimental and computational studies suggest that 375 nm excitation of arylchlorodiazirines furnishes their S(1) excited states with lengthened C-N bonds, a positive charge at the para and diazirine carbon atoms, and a negative charge at the nitrogen atoms. These structures rationalize the observed solvent and substituent effects on the excited state lifetimes.
Zhang
Yunlong
Y
Department of Chemistry, The Ohio State University, Columbus, Ohio 43210, USA.
Wang
Lei
L
Moss
Robert A
RA
Platz
Matthew S
MS