Liquid crystalline and light emitting polyacetylenes: Synthesis and properties of biphenyl-containing poly(1-alkynes) with different functional bridges and spacer lengths
文献类型：期刊论文
| 作者 | Lam JWY ; Dong YP ; Cheuk KKL ; Luo JD ; Xie ZL ; Kwok HS ; Mo ZS ; Tang BZ |
| 刊名 | macromolecules
 |
| 出版日期 | 2002 |
| 卷号 | 35期号:4页码:1229-1240 |
| ISSN号 | 0024-9297 |
| 关键词 | SUBSTITUTED POLYACETYLENES MONOSUBSTITUTED POLYACETYLENE DISUBSTITUTED POLYACETYLENE BLOCK-COPOLYMERS DERIVATIVES CHAIN POLYMERS ELECTROLUMINESCENCE POLYMERIZATION LUMINESCENCE |
| 通讯作者 | tang bz |
| 中文摘要 | biphenyl- (biph-) containing 1-alkynes (3 and 4) and their polymers (1 and 2) with varying bridge groups and spacer lengths were synthesized and the effects of the structural variation on their properties, especially their mesomorphism and photoluminescence behaviors, were studied. the acetylene monomers 3(3) [hcdropc(ch2)(3)o-biph-oco(ch2)(10)ch3] and 4(m) [hcdropc(ch2)(m)oco-biph-oco(ch2)(10)-ch3, m = 3, 4] were prepared by sequential etherization and esterification reactions of 1-alkynes. while 3(3) exhibits enantiotropic crystal e and smb mesophases, its structural cousin 4(3) displays only a monotropic smb phase. enantiotropic sma and smb mesophases are, however, developed when the spacer length is increased to 4. polymerizations of the monomers are effected by mo-, w-, rh-, and fe-based catalysts, with the wcl6-ph4sn catalyst giving the best results (isolation yield up to 85% and m-w up to 59000). the polymers were characterized by ir, uv, nmr, tga, dsc, pom, xrd, and pl analyses. compared to 1(3), 2(3) shows a red-shifted absorption, a higher t-i, and a better packed interdigitated bilayer sma(d) structure, while the mesophase of 2(4) involves monolayer-packing arrangements of the mesogens. upon photoexcitation, 1(3) emits almost no light but 2(m) gives a strong ultraviolet emission (lambda(max) similar to 350 nm), whose intensity increases with the spacer length. |
| 收录类别 | SCI收录期刊论文 |
| 语种 | 英语 |
| WOS记录号 | WOS:000173799400016 |
| 公开日期 | 2010-11-03 |
| 源URL | [http://202.98.16.49/handle/322003/18777]  |
| 专题 | 长春应用化学研究所_长春应用化学研究所知识产出_期刊论文 |
| 推荐引用方式 GB/T 7714 | Lam JWY,Dong YP,Cheuk KKL,et al. Liquid crystalline and light emitting polyacetylenes: Synthesis and properties of biphenyl-containing poly(1-alkynes) with different functional bridges and spacer lengths[J]. macromolecules,2002,35(4):1229-1240. |
| APA | Lam JWY.,Dong YP.,Cheuk KKL.,Luo JD.,Xie ZL.,...&Tang BZ.(2002).Liquid crystalline and light emitting polyacetylenes: Synthesis and properties of biphenyl-containing poly(1-alkynes) with different functional bridges and spacer lengths.macromolecules,35(4),1229-1240. |
| MLA | Lam JWY,et al."Liquid crystalline and light emitting polyacetylenes: Synthesis and properties of biphenyl-containing poly(1-alkynes) with different functional bridges and spacer lengths".macromolecules 35.4(2002):1229-1240. |
入库方式： OAI收割
来源：长春应用化学研究所
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