TY - JOUR
T1 - Femtosecond photo-ionization of nucleic acid bases
T2 - Electronic lifetimes and electron yields
AU - Reuther, A.
AU - Iglev, H.
AU - Laenen, R.
AU - Laubereau, A.
PY - 2000/7/28
Y1 - 2000/7/28
N2 - Femtosecond spectroscopy of aqueous solutions of the four nucleic acid bases adenine, cytosine, thymine and uracil is presented with probing from 282 nm to 750 nm. After two-step excitation at 282 nm part of the molecules returns to the ground state allowing for the determination of the lifetime of the S1 state yielding values of τ1≃1 ps for the four bases. The remainder photo-ionize with an ionization yield of 0.7 for adenine, twice as large as for the other bases. The first intermediate is assigned to a (base+:e-)-pair with a lifetime of 10 ps for adenine, four times longer than for the other solutions.
AB - Femtosecond spectroscopy of aqueous solutions of the four nucleic acid bases adenine, cytosine, thymine and uracil is presented with probing from 282 nm to 750 nm. After two-step excitation at 282 nm part of the molecules returns to the ground state allowing for the determination of the lifetime of the S1 state yielding values of τ1≃1 ps for the four bases. The remainder photo-ionize with an ionization yield of 0.7 for adenine, twice as large as for the other bases. The first intermediate is assigned to a (base+:e-)-pair with a lifetime of 10 ps for adenine, four times longer than for the other solutions.
UR - https://www.scopus.com/pages/publications/0000794812
U2 - 10.1016/S0009-2614(00)00699-0
DO - 10.1016/S0009-2614(00)00699-0
M3 - Article
AN - SCOPUS:0000794812
SN - 0009-2614
VL - 325
SP - 360
EP - 368
JO - Chemical Physics Letters
JF - Chemical Physics Letters
IS - 4
ER -