New donor-p-acceptor (D-p-A) type conjugated copolymers, poly [(4,8-bis((2-hexyldecyl)oxy)benzo [1,2-b:4,5-b 0 ] dithiophene)-alt-(2,5-bis(4-octylthiophen-2-yl)thiazolo[5,4-d]thiazole)] (PBDT-tTz), and poly [(4,8-bis((2-hexyldecyl) [5,4-d]thiazole)] (PBDT-ttTz) were synthesized and characterized with the aim of investigating their potential applicability to organic photovoltaic active materials. While copolymer PBDT-tTz showed a zigzagged non-linear structure by thiophene p-bridges, PBDT-ttTz had a linear molecular structure with thieno[3,2-b]thiophene p-bridges. The optical, electrochemical, morphological, and photovoltaic properties of PBDT-tTz and PBDT-ttTz were systematically investigated. Furthermore, bulk heterojunction photovoltaic devices were fabricated by using the synthesized polymers as p-type donors and [6,6]phenyl-C 71 -butyric acid methyl ester as an n-type acceptor. PBDT-ttTz showed a high power conversion efficiency (PCE) of 5.21% as a result of the extended conjugation arising from the thienothiophene p-bridges and enhanced molecular ordering in the film state, while PBDT-tTz showed a relatively lower PCE of 2.92% under AM 1.5 G illumination (100 mW/cm 2 ). V C 2017

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A series of polystyrene (PS) copolymers containing 2,3,4,5,6-pentafluorostyrene units with different monomer ratios were prepared for antifouling applications. PS, poly(styrene-co-pentafluorostyrene) (poly(S-co-FS)), and poly(pentafluorostyrene) (PFS) were synthesized by free-radical polymerization and characterized by 1H NMR, Fourier-transform infrared spectroscopy, and gel permeation chromatography. The surface energy of the polymer films decreased with increasing content of fluorinated styrene. Protein adsorption experiments were carried out on the synthesized polymer films using fluorescein isothiocyanate-labeled bovine serum albumin as a fluorescent protein. The photo-luminescence intensity of the protein-adsorbed polymer films decreased dramatically as the content of hydrophobic fluorinated styrene increased, suggesting that poly(S-co-FS) copolymers and PFS could be used as potential antibiofouling coatings.

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