Ultrafast optical response in a quasi-one-dimensional halogen-bridged mixed-valence complex [Pd(en)2] [PdCl2(en)2] (ClO4)4

✍ Scribed by H. Ooi; M. Yoshizawa; M. Yamashita; T. Kobayashi

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 459 KB
• Volume: 210
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(93)87041-z

✦ Synopsis

The ultrafast optical response in a quasi-one-dimensional halogen-bridged mixed-valence complex [Pd(en),] [PdClz(en),] (ClO,), (en=ethylenediamine) has been investigated by the use of a femtosecond absorption spectrum, calculated from a pump-probe reflection spectrum at room temperature by the Kramer+Kronig relations. The time dependence of the transient photoinduced absorption around 1.7 eV and the bleaching from I .9 to 2.5 eV were calculated for three decay components. They are free excitons with a lifetime of about 800 fs, self-trapped excitons with a lifetime of about 3 ps, and polaron pairs which relax within a 100 ps time period.