Synthesis and characterization of novel poly(2-methoxy-(5-(6′-dimethylphosphonate)-hexyloxy)-1,4-phenylenevinylene-ran-2-methoxy-5-(2′-ethylhexyloxy)-1,4-phenylenevinylene)s (MEH-PO-PPVs) and their tunable emission colors
作者： Su-Jin Yoon , Shashadhar Samal , Tae-Ho Yoon
DOI: 10.1016/J.EURPOLYMJ.2010.10.009
关键词:
摘要: Abstract Poly(2-methoxy-(5-(6′-dimethylphosphonate)-hexyloxy)-1,4-phenylenevinylene-ran-2-methoxy-5-(2′-ethylhexyloxy)-1,4-phenylenevinylene) (MEH-PO-PPV) was synthesized via Heck coupling reaction of MPOHOB-2Br (1) (1-methoxy-(4-(6-dimethylphosphonate)-hexyloxy)-2,5-dibromobenzene), MEHOB-2Br (2) (1-methoxy-4-(6-bromohexyloxy)-2,5-dibromobenzene), and MEHOB-DV (4) (1-methoxy-4-(2′-ethylhexyloxy)-2,5-divinylbenzene) by varying the molar ratios monomers. The monomers their intermediates were characterized 1H NMR, FT-IR, melting point elemental analyzer, subsequent polymers GPC, DSC, TGA, solubility test. optical (UV–vis, PL) electrical properties (CV) also evaluated. MEH-PO-PPV, containing phosphine oxide groups, exhibited better solubility, lower HOMO LUMO levels, larger band gaps. In addition, PL emission gradually shifted to shorter wavelength, providing 570 (MEH-10PO-PPV), 519 (MEH-30PO-PPV), 465 nm (MEH-50PO-PPV) as P O content increased, compared with 598 nm (MEH-PPV).
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