The first synthesis of well-defined poly(2,5-silole) [3]

Journal of the American Chemical Society

Volumn 121, Issue 44, 1999, Pages 10420-10421

  Yamaguchi, Shigehiro ^a   Jin, Ren Zhi ^a   Itami, Yujiro ^a   Goto, Tomoyuki ^a   Tamao, Kohei ^a  

^a KYOTO UNIVERSITY   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

POLYMER;

CHEMICAL REACTION; CHEMICAL STRUCTURE; LETTER; NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY; SYNTHESIS;

EID: 0033544395     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja9927826     Document Type: Letter

References (41)

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29. Recent reviews for siloles: (a) Dubac, J.; Laporterie, A.; Manuel, G. Chem. Rev. 1990, 90, 215. (b) Colomer, E.; Corriu, R. J. P.; Lheureux, M. Chem. Rev. 1990, 90, 265. (c) Dubac, J.; Guerin, C.; Meunier, P. The Chemistry of Organic Silicon Compounds; Rappoport, Z., Apeloig, Y., Eds.; John Wiley & Sons: New York, 1998; Vol. 2, Chapter 34.
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38. For the present polymerization, interestingly, the amount of the palladium catalyst was critical. The use of larger amounts of catalyst significantly decreased the molecular weight of the polymer and, when a 0.10 molar amount of catalyst was employed, no polymeric materials were obtained by reprecipitation from methanol. Under such conditions, the coupling reaction with butyl iodide seemed to significantly compete.
39. max 485 nm, log ∈ 3.73 (per silole unit) at 293K.
40. For example, the calculated molecular weights for 14mers having (H,H), (H,Bu), and (H,I) terminal sets are 3700.18, 3756.24, and 3826.08, respectively. Their found masses are 3700.4, 3755.9, and 3825.1, respectively.
41. Polymer 1 shows no fluorescence at room temperature, probably due to the noncoplanar conformation of the polymer main chain.