Polymeric organosilicon systems. 26. Synthesis and photochemical and conducting properties of poly[(tetraethyldisilanylene)oligo(2,5-thienylenes)]

Organometallics

Volumn 15, Issue 8, 1996, Pages 2000-2008

  Kunai, Atsutaka ^a   Ueda, Takafumi ^a   Horata, Katsuhiro ^a   Toyoda, Eiji ^a   Nagamoto, Ikuko ^a   Ohshita, Joji ^a   Ishikawa, Mitsuo ^a   Tanaka, Kazuyoshi ^b  

^a HIROSHIMA UNIVERSITY   (Japan)

^b KYOTO UNIVERSITY   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0000614328     PISSN: 02767333     EISSN: None     Source Type: Journal    
DOI: 10.1021/om950585j     Document Type: Article

References (34)

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27. 27
28. Yamamoto, T.; Sanechika, K.; Yamamoto, A. Bull. Chem. Soc. Jpn. 1983, 56, 1497.
29. n are rather high.
30. The shapes of UV absorption bands of 2-5 are exhibited in ref 23a.
31. n-Br in THF are observed at 252 (n = 1), 320 (n = 2), and 366 (n = 3) nm, and their shapes are quite similar to those for the respective disilanylene polymers 1-3.
32. Polymers 1-5 and also model compound 8a are hardly soluble in hexane, and therefore we used benzene as the solvent.
33. 24 might also depend on the wavelength of light (254 nm) and the concentration of the polymer (100 mg in 25 mL in this case).
34. It is worth noting that upon irradiation with a low-pressure lamp, a novel GPC profile of molecular weight distribution was observed for polymers 2-5. Thus, a GPC peak due to the original polymer decreased in its position, and instead, a new peak grew in a lower molecular weight region with increasing time of irradiation. On the other hand, an initial monomodal peak shifted gradually to the lower direction, when polymer 1 was photolyzed with the low-pressure lamp, or when all polymers were photolyzed with a high-pressure mercury lamp.