Optically active polythiophenes

Details Optically active polythiophenes Optically active polythiophenes

2005-04-12

2005-04-12

Buttner, David J. (Department: 1712)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From sulfur-containing reactant

C526S256000, C549S059000, C549S080000, C549S083000, C549S086000

Reexamination Certificate

active

06878801

ABSTRACT:
Novel polythiophenes which exhibit strong main chain absorption in the ultraviolet to visible region, show optical activity depending on the polymeric chain alone, and comprise as repeating units thiophene rings containing chiral substituent groups, and are represented by the following general formula:(wherein R1and R2are the same or different, each representing a hydrogen atom or an organic group, of which at least one is an enantiopure alkyl group with a branch structure at the β-position, and n represents the number of repeating units selected from 10 to 100,000).

REFERENCES:
patent: 10-048678 (1998-02-01), None
Fujiki et al.,Polymer Preprints, 40(1), pp. 523-524, (1999).
Kotkar et al.,Frontiers of Polymer Research, pp. 407-411, (1991).
Kotkar et al.,Journal Chemical Society Chemical Communications, pp. 917-918, (1988).

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