دورية أكاديمية
Functional disubstituted polyacetylenes and soluble cross-linked polyenes: Effects of pendant groups or side chains on liquid crystallinity and light emission of poly(1-phenyl-1-undecyne)s
| العنوان: | Functional disubstituted polyacetylenes and soluble cross-linked polyenes: Effects of pendant groups or side chains on liquid crystallinity and light emission of poly(1-phenyl-1-undecyne)s |
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| المؤلفون: | Lam, JWY, Dong, YP, Law, CCW, Dong, YQ, Cheuk, KKL, Lai, LM, Li, Z, Sun, JZ, Chen, HZ, Zheng, Q, Kwok, HS, Wang, M, Feng, XD, Shen, JC, Tang, BZ |
| المساهمون: | Tang, BZ (reprint author), Hong Kong Univ Sci & Technol, Dept Chem, Clear Water Bay, Kowloon, Hong Kong, Peoples R China., Hong Kong Univ Sci & Technol, Dept Chem, Kowloon, Hong Kong, Peoples R China., Hong Kong Univ Sci & Technol, Ctr Display Res, Kowloon, Hong Kong, Peoples R China., Zhejiang Univ, Dept Polymer Sci & Engn, Hangzhou 310027, Peoples R China., Peking Univ, Dept Polymer Sci & Engn, Beijing 100871, Peoples R China., Hong Kong Univ Sci & Technol, Dept Chem, Clear Water Bay, Kowloon, Hong Kong, Peoples R China. |
| المصدر: | EI ; SCI |
| بيانات النشر: | macromolecules |
| سنة النشر: | 2005 |
| المجموعة: | Peking University Institutional Repository (PKU IR) / 北京大学机构知识库 |
| مصطلحات موضوعية: | POLYMERS NOBEL LECTURE, SUBSTITUTED POLYACETYLENES, CONJUGATED POLYMERS, THERMAL-STABILITY, MONOSUBSTITUTED POLYACETYLENES, EMITTING POLYACETYLENES, OPTICAL-PROPERTIES, SPACER LENGTHS, ELECTROLUMINESCENCE, PHOTOLUMINESCENCE |
| الوصف: | A group of new poly(1-phenyl-1-undecyne)s with different mesogenic and chromophoric pendant groups or side chains were successfully synthesized and the structural variations were found to greatly affect the mesomorphic and luminescent properties of the polymers. The 1-phenyl-1-undecyne monomers (C6H5)C equivalent to C(CH2)(9)OCOR with R=C6H4-C6H10-C5H11 (1), C6H4-OCO-C6H4-OC6H13 (2), and C6H4-C equivalent to C-C6H4-OC7H15 (3) were prepared by simple esterification and/or coupling reactions. The polymerizations of 1-3 were effected by WCl6-Ph4Sn in toluene at 60-80 degrees C, giving polymers with high molecular weights in good isolation yields. The structures and properties of the polymers were characterized and evaluated by GPC, III, NMR, TGA, DSC, POM, XRD, U-V, and PL analyses. The polymerizations of 1 and 2 yield linear poly(1-phenyl-1-alkyne)s P1 and P2, respectively, while that of 3 gives a nonlinear macromolecule with its poly(1-phenyl-1-alkyne) main chain cross-linked by the oligo(diphenylacetylene) side chains resulted from the partial polymerization of its diphenylacetylene pendants (P3x). All the polymers are completely soluble in common solvents and are thermally stable with T-d >= 390 degrees C. Polymers P1 and P2 undergo nematic and smectic transitions at similar to 100 and similar to 170 degrees C, respectively, while P3x is nonmesomorphic. Upon excitation, the poly(1-phenyl-1-alkyne) chains of P1 and P2 emit a strong blue light of 460 rim, with their fluorescence quantum efficiencies comparable to or higher than that of poly(1-phenyl-1-octyne), a highly emissive disubstituted polyacetylene. Polymer P3x emits a blue-green light of 490 nm, due to the energy transfer from its poly(l-phenyl-l-octyne) main chain to its oligo(diphenylacetylene) side chains. ; Polymer Science ; SCI(E) ; EI ; 37 ; ARTICLE ; 8 ; 3290-3300 ; 38 |
| نوع الوثيقة: | journal/newspaper |
| اللغة: | English |
| ردمك: | 978-0-00-228442-4 0-00-228442-1 |
| تدمد: | 0024-9297 |
| العلاقة: | MACROMOLECULES.2005,38,(8),3290-3300.; 991765; http://hdl.handle.net/20.500.11897/253820Test; WOS:000228442100032 |
| DOI: | 10.1021/ma048076t |
| الإتاحة: | https://doi.org/20.500.11897/253820Test https://doi.org/10.1021/ma048076tTest https://hdl.handle.net/20.500.11897/253820Test |
| رقم الانضمام: | edsbas.DC58B052 |
| قاعدة البيانات: | BASE |
| ردمك: | 9780002284424 0002284421 |
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| تدمد: | 00249297 |
| DOI: | 10.1021/ma048076t |