Arylene-vinylene copolymer preparation

R. M. Gregorius, P. M, Lahti, and F. E. Karasz, Preparation and characterisation of poly(arylene-vinylene) copolymers and their blends. Macromolecules 25 6664 (1992). 

Heteroaromatic ring stmctures can also be incorporated into poly(arylene vinylene) stmctures using the same precursor polymer method shown for PPV. Poly(thienylene vinylene) (13) (113—118) and poly(furylene vinylene) (14) (119,120) have been prepared in this manner. In addition, alkoxy-substituted poly(thienylene vinylenes) (15) (119,121) have been synthesized. Various copolymers containing phenjiene, thienylene, and furylene moieties have also been studied (120,122,123). 

Poly(arylene vinylene) derivatives were prepared by Wittig reaction of diphosphonium compounds(I and V), and dialdehyde compounds , Ill,and IV) as shown in Figurel. When I and II, I and IE, I and IV, and V and II are used, soluble alternating copolymers of (A), (B), (C), and (D) are obtained respectively(16,17,18). The diphosphonium compounds were prepared using triphenylphosphine and... 

The only example of rod-rod copolymers with polyphenylene-based rods are the polymers 230 and 231, in which two polyfluorene blocks are separated by a short arylene vinylene unit (Scheme 105). These were prepared by Suzuki polycondensation of a fluorene monoboronic acid 232 in the presence of the bromo-substituted oUgo(arylene vinylene) units 233 and 234 [321], From the molecular masses of the polymers, the total number of fluorene units in both 230 and 231 is about 18. 

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