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- W1980313833 abstract "Biphenyl (Biph)-containing 1-phenyl-1-octynes and their polymers are synthesized, and the effects of functional bridge groups on the mesomorphic and optical properties of the polymers are studied. The nonmesomorphic disubstituted acetylene monomers (C6H13)C⋮C(C6H4)O(CH2)12O−Biph−OC7H15 (1), (C6H13)C⋮C(C6H4)O(CH2)11OOC−Biph−OC7H15 (2), and (C6H13)C⋮C(C6H4)CO2(CH2)12OOC−Biph−OC7H15 (3) are prepared by multistep reaction routes and converted into their corresponding polymers P1−P3 by a WCl6−Ph4Sn catalyst. The structures and properties of the polymers are characterized and evaluated by NMR, TGA, DSC, POM, XRD, UV, and PL analyses. The mesogenic pendants have endowed the polymers with high thermal stability (≥400 °C). While P1 exhibits no liquid crystallinity, P2 and P3 form enantiotropic SA phase with a monolayer structure. Upon photoexcitation, the polymers emit blue and blue-green lights of 460 and 480 nm, respectively, in THF with quantum efficiencies larger than 30%. UV irradiation of a thin film of P2 through a mask oxidizes and quenches the light emission of the exposed regions, generating a two-dimensional luminescent photoimage." @default.
- W1980313833 created "2016-06-24" @default.
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- W1980313833 date "2006-09-26" @default.
- W1980313833 modified "2023-10-03" @default.
- W1980313833 title "Functional Disubstituted Polyacetylenes: Synthesis, Liquid Crystallinity, Light Emission, and Fluorescent Photopatterning of Biphenyl-Containing Poly(1-phenyl-octyne)s with Different Functional Bridges" @default.
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- W1980313833 doi "https://doi.org/10.1021/jp064315y" @default.
- W1980313833 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/17064116" @default.
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