Femtosecond Transient Absorption Studies of Simple Polyenes in Solution | Zendy

Kaoru Ohta | Zendy; Yukito Naitoh | Zendy; Keisuke Tominaga | Zendy; Noboru Hirota | Zendy; Keitaro Yoshihara | Zendy

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Femtosecond Transient Absorption Studies of Simple Polyenes in Solution

Author(s) -

Kaoru Ohta,

Yukito Naitoh,

Keisuke Tominaga,

Noboru Hirota,

Keitaro Yoshihara

Publication year - 1999

Publication title -

laser chemistry

Language(s) - English

Resource type - Journals

eISSN - 1026-8014

pISSN - 0278-6273

DOI - 10.1155/1999/80507

Subject(s) - femtosecond , chemistry , ultrafast laser spectroscopy , transient (computer programming) , relaxation (psychology) , absorption (acoustics) , excited state , ground state , vibrational energy relaxation , time constant , photochemistry , signal (programming language) , molecular physics , atomic physics , optics , laser , physics , psychology , social psychology , electrical engineering , computer science , engineering , operating system , programming language

We have conducted femtosecond transient absorption experiments on the excited-statedynamics of trans- and cis-hexatriene (HT) in solution. The transient absorption in thevisible region decays with the time constant of about 500 fs, indicating that the internalconversion (IC) to the ground state occurs quite efficiently. The bleach recovery signalcontains several time constants. The vibrational relaxation in the ground state occurs in10–20ps and the slow relaxation process, which may be due to the conformationalchange around C—C single bond, proceeds in a subnanosecond time scale.

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