Browsing by Author "Yan, W"

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Synthesis and characterization of poly(pyrrolyl methine)
(2001-09-01)
Yan, W
;
Li, AK
;
Hsu, CS
;
Zhang, ZC
;
Wan, MX
A novel small band-gap conjugated polymer - poly [(3-acetylpyrrole-2,5-diyl)(4-dimethylaminobenzyliene)(3-acetylpyrrolequinodimethane-2,5-diyl)] (PAPDMABE) - and its precursor were synthesized by a simple method and characterized by H-1-NMR, FT-IR, TGA and UV-VIS. The polymer can be dissolved in strong polar solvents such as DMSO, DMF or NMP. The band-gap energy of PAPDMABE, was found to be 0.95 eV. The conductivity of doped products with iodine falls in the range of a semiconductor.
Synthesis and characterization of small band-gap conjugated polymers - Poly(pyrrolyl methines)
(2002-10-01)
Yan, W
;
Hsu, CS
;
Wei, Y
;
應用化學系
;
Department of Applied Chemistry
A kind of small band-gap conjugated polymers-poly (pyrrolyl methines) and their precursors-(poly pyrrolyl methanes) have been synthesized by a simple method and characterized by (HNMR)-H-1, FT-IR, TGA and UV-Vis. These polymers can be dissolved in high polar solvents such as DMSO, DMF or NMP. The results reveals that the band-gap of the synthesized conjugated polymers are in the range of 0.96similar to1.14 eV and they all belong to the small band-gap polymers. The conductivity of doped products with iodine is in the range of semiconductor.
Synthesis of microspheres of poly (pyrrolyl methine) by interfacial polymerization
(2003-04-04)
Yan, W
;
Wei, ZX
;
Hsu, CS
;
Wan, MX
;
應用化學系
Conducting microspheres of poly (pyrrolyl methine) (PPDMABE-MS) were synthesized by the interfacial polymerization. An optimal condition was found under which spheres with 0.5-1 mu min diameter were obtained. The morphology of PPDMABE-MS was proved by SEM, and their backbone structure was characterized by FT-IR. The measurement results indicated that the molecular structures of the PPDMABE-MSs were identical to that of PPDMABE synthesized by solution method.