We synthesized water-insoluble polymers, poly(b-cyclodextrin-co-citric acid)s, by heating a mixture of citric acid, cyclodextrin (CD), and Na 2 HPO 4 as a catalyst with a 6 : 1 : 2 molar ratio at 160, 170, and 180 C for 10 and 20 min. The chemical composition of the polyesters was determined by high pressure liquid chromatography (HPLC) analysis of the polymer hydrolysates. The crosslinking mechanisms and thermal degradation of the polymers were also investigated. The polyesters contained 30-35% citric acid, 1-4% unsaturated carboxylic acids (i.e., itaconic, cis-aconitic, trans-aconitic, and mesaconic acids), and 60-70% CD, whereas about 40% of them were able to form inclusion complexes.

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Summary: A novel acrylate polymer with a carbazole pendant group and bipyridine derivatives as side chains was synthesized, in which derivatives of bipyridine as electro‐optic chromophores and carbazole as photoconductive moiety were covalently linked to the acrylate backbone. 2–(Carbazol‐9‐yl)ethyl methacrylate (CEM) and methacrylic 2‐[5‐(2‐{5,5′‐dimethyl‐6′‐[2‐(5‐pentylthiophen‐2‐yl)vinyl]‐3,3′‐bipyridin‐6‐yl}vinyl)thiophen‐2‐yl]ethyl methacrylate (BiPy) were synthesized and then copolymerized to give 99:1, 98:2, 92:8 (mol/mol) CEM/BiPy copolymers. Films of the copolymers blended with poly(3‐octylthiophene) (P3OT) or poly(3‐decylthiophene) (PDT) and sandwiched between the transparent ITO and Al electrode were examined for photovoltaic properties.

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