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设计并合成了具有较大空间位阻侧链的取代炔烃 2-炔丙氧基-1,4-对苯二甲酸二甲酯单体,分别采用WCl6,WCl6-SnPh4和[Rh(nbd)Cl]2催化体系使其聚合,考察了不同催化剂对聚合的影响.采用红外光谱和核磁共振等技术对单体及聚合物结构进行了表征,并用紫外光谱和荧光光谱研究了所得聚合物的光学性能.结果表明,使用[Rh(nbd)Cl]2催化剂时得到的聚合物是高反式结构,荧光光谱中除了侧基的350 nm发射峰外,还在429 nm处存在较弱的共轭主链发射.使用WCl6-SnPh4催化体系得到的聚合物由于较高的顺式含量,主要是侧基的发射,而较大侧基位阻使主链共轭降低.尽管存在较短的间隔基,引入较大空间位阻侧基仍然迫使聚合物主链扭曲,顺式结构中侧基空间位阻的影响更大.

参考文献

[1] Chauser M G;Rodionov Yu M;Misin V M;Cherkashin M I .[J].Russian Chemical Reviews,1976,45(04):348.
[2] Ito T;Shirakawa H;Ikeda S .[J].Journal of Polymer Science Part A:Polymer Chemistry,1974,12(01):11.
[3] Shirakawa H;Louis E J;MacDiarmid A G;Chiang C K,Heeger A J.[J].Journal of the Chemical Society,Chemical Communications,1977(16):578.
[4] Masuda T;Hasegawa K-I;Higashimura T .[J].Macromolecules,1974,7(06):728.
[5] Wegner G .[J].Angewandte Chemie International Edition in English,1981,20(04):361.
[6] Masuda T;Yamagata M;Higashimura T .[J].Macromolecules,1984,17(02):126.
[7] Cotton F A;Hall W T;Cann K J;Karol F J .[J].Macromolecules,1981,14(02):233.
[8] 徐洪耀,光善仪,张胜义,童保云,唐本忠.聚苯乙炔立体结构与光致发光性能关系的研究[J].高分子学报,2001(02):186-190.
[9] Nagai K;Masuda T;Nakagawa T;Freeman B D Pinnau Z .[J].Progress in Polymer Science,2001,26(05):721.
[10] Choi S-K;Gal Y-S;Jin S-H;Kim H-K .[J].Chemical Reviews,2000,100(04):1645.
[11] Nomura R;Masuda T.[A].New York:Wiley,2003
[12] 沈之荃.[J].高分子通报,1992(01):41.
[13] 洪海平;周淑琴;金祥凤.[J].高分子通报,1992(02):93.
[14] Lam JWY.;Tang BZ. .Liquid-crystal line and light-emitting polyacetylenes [Review][J].Journal of Polymer Science, Part A. Polymer Chemistry,2003(17):2607-2629.
[15] Lam JWY;Tang BZ .Functional polyacetylenes[J].Accounts of Chemical Research,2005(9):745-754.
[16] Chen L;Chen YW;Zha DJ;Yang Y .Synthesis and properties of polyacetylenes with directly attached bis(4-alkoxyphenyl)terephthalate mesogens as pendants[J].Journal of Polymer Science, Part A. Polymer Chemistry,2006(8):2499-2509.
[17] Chen Y W;Wombacher R;Wendorff J H;Greiner A .[J].Polymer,2003,44(19):5513.
[18] Stagnaro P.;Conzatti L.;Costa G.;Gallot B.;Tavani C.;Valenti B. .Polyacetylenes bearing mesogenic side groups: Synthesis and properties, 2 - Biphenyl moieties with a short spacer and different tail lengths[J].Macromolecular chemistry and physics,2003(4):714-724.
[19] Percec V .[J].Polymer Bulletin,1983,10(1-2):1.
[20] Lam JWY.;Dong YP.;Cheuk KKL.;Luo JD.;Xie ZL.;Kwok HS.;Mo ZS.;Tang BZ. .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(4):1229-1240.
[21] Okano Y;Masuda T;Higashimura T .[J].Journal of Polymer Science Part A:Polymer Chemistry,1985,23(09):2527.
[22] Corey F A.Organic Chemistry[M].New York:McGraw-Hill,1996
[23] Simionescu S;Percec V .[J].Journal of Polymer Science Part A:Polymer Chemistry,1977,15(10):2497.
[24] Mayershofer MG;Nuyken O .Living polymerization of substituted acetylenes[J].Journal of Polymer Science, Part A. Polymer Chemistry,2005(23):5723-5747.
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