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Nanosecond time-resolved reflection spectrum of a polydiacetylene single crystal

✍ Scribed by Takayoshi Kobayashi; Jun-ichi Iwai; Masayuki Yoshizawa

Publisher: Elsevier Science
Year: 1984
Tongue: English
Weight: 414 KB
Volume: 112
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(84)85758-9

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✦ Synopsis

A transient photoinduced reflection difference spectrum of a polymeric single crystal of 2.4-hexadiyn-1,6di-p-toluenesulphonate was measured at room temperature. The recombination of the photoexcited species is dominated by onedimensional random-walk kinetics which can be espressed by a single error function, erf[(T/t)"2] with 7 = 0.75 f 0.25 ps, over the delay time between 0 and 180 ps.

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Dependence of the spectrum and decay of

Dependence of the spectrum and decay of transient photoinduced reflectance change on excitation wavelength and intensity in polydiacetylene single crystals

✍ Takayoshi Kobayashi; Hidetsugu Ikeda 📂 Article 📅 1987 🏛 Elsevier Science 🌐 English ⚖ 482 KB

Transient reflectance changes in a polydiacetylene-toluene-sulfonate (PDA-TS) single crystal were found to be induced by pulsed excitations at 2.33 eV (532 nm), 3.49 eV (355 nm), and 4.66 eV (266 nm). The negative reflectance change around 1.4 eV, observed only by excitations at 4.66 and 3.49 eV was