Abstract

We report on the transient optical response of the polydiacetylene DCHD at low temperature. Ultrafast pump-probe spectroscopic measurements reveal that excitation of the polymer <i>N</i>-methyl carbazolyl side group results in instantaneous (<10 ps) excitation transfer to the polymer backbone at 10 K. The slow population recovery signal seen subsequent to excitation transfer to the polymer backbone exhibits an excitation energy dependence that is indicative of the existence of multiple conformers. The energy barrier between these conformers is inferred to be <0.5 kcal/mol.

Relaxation dynamics of photoexcitations in polydiacetylenes and polythiophene

Takayoshi Kobayashi, Masayuki Yoshizawa, Uwe Stamm, Makoto Taiji, and Masamitsu Hasegawa
J. Opt. Soc. Am. B 7(8) 1558-1578 (1990)

Optical Stark shifts of Raman gain spectra in polydiacetylene

S. D. Halle, M. Yoshizawa, H. Matsuda, S. Okada, H. Nakanishi, and T. Kobayashi
J. Opt. Soc. Am. B 11(5) 731-736 (1994)

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Gary M. Carter
J. Opt. Soc. Am. B 4(6) 1018-1024 (1987)

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Lina Yang, R. Dorsinville, Q. Z. Wang, W. K. Zou, P. P. Ho, N. L. Yang, R. R. Alfano, R. Zamboni, R. Danieli, G. Ruani, and C. Taliani
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Near-resonant third-order optical nonlinearities in p-toluene sulfonate polydiacetylene

J. Bolger, T. G. Harvey, Wei Ji, A. K. Kar, S. Molyneux, B. S. Wherrett, D. Bloor, and P. Norman
J. Opt. Soc. Am. B 9(9) 1552-1557 (1992)