Excited-state lifetime of adenine near the first electronic band origin.
The excited-state lifetime of supersonically cooled adenine was measured in the gas phase by femtosecond pump-probe transient ionization as a function of excitation energy between 36 100 and 37 500cm(-1). The excited-state lifetime of adenine is ∼2ps around the 0-0 band of the (1)L(b) ππ(∗) state (36 105cm(-1)). The lifetime drops to ∼1ps when adenine is excited to the (1)L(a) ππ(∗) state with the pump energy at 36 800cm(-1) and above. The excited-state lifetimes of (1)L(a) and (1)L(b) ππ(∗) states are differentiated in accordance with previous frequency-resolved and computational studies.
Department of Chemistry, Ajou University, Suwon 443-749, Republic of Korea. hkang@ajou.ac.kr
Hyuk
H
Kang
Jinyoung
J
Chang
Sang Hak
SH
Lee
Tae Kyu
TK
Ahn
Nam Joon
NJ
Kim
Seong Keun
SK
Kim
D000225:Adenine / Q000737:chemistry*; D004583:Electrons; D010777:Photochemistry
D000225:Adenine