Analysis of vibronic structure in the 300 K piezomodulated reflection (PMR) spectra of DCHD and THD indicates the presence of a single allowed electronic state accompanied by significant hot band activity. Observed vibronic progressions and hot bands are consistent with corresponding Raman spectra.
Single-crystal reflection and Raman spectra of the polydiacetylene THD
โ Scribed by M.E. Morrow; K.M. White; C.J. Eckhardt; D.J. Sandman
- Publisher
- Elsevier Science
- Year
- 1987
- Tongue
- English
- Weight
- 572 KB
- Volume
- 140
- Category
- Article
- ISSN
- 0009-2614
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โฆ Synopsis
The 298 K Raman and reflection spectra of the polydiacetylene THD, a close structural variant of DCHD, are presented. The polymer double-and triple-bond stretch frequencies are 1485 and 21 I 1 cm-', respectively, and the lowest electronic transition peaks at 17600 cm-'. The reflection spectrum is more reminiscent of the polydiacetylene TCDU than DCHD.
๐ SIMILAR VOLUMES
The 298 K Raman and reflection spectra of a single crystal TCDU polydiacetylene polymorph (TCDU-A') are presented. The lowest energy reflection maximum in TCDU-A\* is seen at 15900 cm-'. Raman and reflection spectra ofTCDU-A\* are similar to those for TCDU-A and thin film TCDU samples and significan
Raman spectra of the black polydiacetylene single crystals TS6 and TS/FBS were recorded by means of a conventional Raman spectrometer with excitation in the near-infrared spectral region. We observed several sidegroup vibrations below 900 cm-' additional to the four strong vibrational modes which mo