Conjugated triblock copolymers containing both electron-donor and electron-acceptor blocks

被引:88
作者
Tu, Guoli
Li, Hongbo
Forster, Michael
Heiderhoff, Ralf
Balk, Ludwig Josef
Scherf, Ullrich
机构
[1] Berg Univ WUppertal, Inst Polymertechnol, D-42097 Wuppertal, Germany
[2] Berg Univ WUppertal, Inst Polymertechnol, D-42119 Wuppertal, Germany
[3] Berg Univ WUppertal, Fachbereich Elektrotech Informat Tech Med Tech, Lehrstuhl Elektron, D-42119 Wuppertal, Germany
关键词
D O I
10.1021/ma060341i
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
We report a straightforward two-step synthesis toward conjugated DAD-type triblock copolymers with both electron-donor ( D) and electron-acceptor ( A) blocks. Cyano-substituted poly( phenylenevinylene) (CN-PPV) prepolymers with two bromide end groups hereby act as the central electron-acceptor building block and are generated under Yamamoto conditions. The dibromo prepolymers are finally coupled with monobromo-terminated regioregular poly(3-hexylthiophene) (P3HT), which is selected as the electron-donor block ( D). The molecular weight of the different blocks, especially the acceptor block, can be controlled by adjusting the polymerization time and the substitution pattern ( degree of alkyl substitution) of the monomers. Elemental analysis, NMR, DSC, and optical spectroscopy prove that the DAD conjugated triblock copolymers. Atomic force microscopy (AFM) images of one triblock copolymer (P3HT1-HCNPPV-P3HT1) exhibit the formation of regular nanosized mesostructures in thin films. The resulting conjugated triblock copolymer shows a distinctly different morphology as compared to a corresponding polymer blend. A covalent connection of donor ( P3HT) and acceptor (CN-PPV) blocks is a favorable way to control the scale length of nanostructure formation.
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页码:4327 / 4331
页数:5
相关论文
共 42 条
[1]   Semiconducting block copolymers -: synthesis and nanostructure formation [J].
Asawapirom, U ;
Güntner, R ;
Forster, M ;
Scherf, U .
THIN SOLID FILMS, 2005, 477 (1-2) :48-52
[2]   Polyphenylene nanostructures [J].
Berresheim, AJ ;
Müller, M ;
Müllen, K .
CHEMICAL REVIEWS, 1999, 99 (07) :1747-1785
[3]   Synthesis of substituted oligothiophenes and x-ray crystal structures of 3'-methyl-2,2':5',2''-terthiophene, 3,3''-dimethyl-2,2':5',2''-terthiophene and 5'-(2-thienyl)-2,2':3',2''-terthiophene [J].
Chaloner, PA ;
Gunatunga, SR ;
Hitchcock, PB .
JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 2, 1997, (08) :1597-1604
[4]  
de Boer B, 2000, ADV MATER, V12, P1581, DOI 10.1002/1521-4095(200011)12:21<1581::AID-ADMA1581>3.0.CO
[5]  
2-R
[6]   Polymer films with a self-organized honeycomb morphology [J].
Francois, B ;
Pitois, O ;
Francois, J .
ADVANCED MATERIALS, 1995, 7 (12) :1041-&
[7]   Comb-like and block liquid crystalline polymers for biological applications [J].
Gallot, B .
PROGRESS IN POLYMER SCIENCE, 1996, 21 (06) :1035-1088
[8]   A polystyrene-oligothiophene-polystyrene triblock copolymer [J].
Hempenius, MA ;
Langeveld-Voss, BMW ;
van Haare, JAEH ;
Janssen, RAJ ;
Sheiko, SS ;
Spatz, JP ;
Möller, M ;
Meijer, EW .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1998, 120 (12) :2798-2804
[9]   Self-assembly of ordered microporous materials from rod-coil block copolymers [J].
Jenekhe, SA ;
Chen, XL .
SCIENCE, 1999, 283 (5400) :372-375
[10]   Self-assembled aggregates of rod-coil block copolymers and their solubilization and encapsulation of fullerenes [J].
Jenekhe, SA ;
Chen, XL .
SCIENCE, 1998, 279 (5358) :1903-1907