Circular differential scattering of light in films of chiral polyfluorene

被引：37

作者：

Lakhwani, Girish ^{[1
]}

Meskers, Stefan C. J. ^{[1
]}

Janssen, Rene A. J. ^{[1
]}

机构：

[1] Eindhoven Univ Technol, Lab Macromol & Organ Chem, NL-5600 MB Eindhoven, Netherlands

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2007年 / 111卷 / 19期

关键词：

D O I：

10.1021/jp067852r

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Circular differential transmission in thick films (1.1 mu m) of poly{9,9-bis[(3S)-3,7-dimethyloctyl]-2,7-fluorene} is investigated. The vitrified liquid crystalline film obtained after annealing shows high circular differential transmission of light in the wavelength range where the polyfluorene does not absorb (lambda > 450 nm). Using a specifically designed chiroptical setup, we show that circular selective reflection of light in which the circular polarization of the light is retained after reflection, a process which is characteristic for cholesteric liquid crystalline films, makes a negligible contribution to the differential transmission. Using an integrating sphere, we show that circular differential scattering can account for the observed circular differential transmission for lambda > 450 nm.

引用

页码：5124 / 5131

页数：8

共 47 条

[1] CIRCULAR DIFFERENTIAL SCATTERING CAN BE AN IMPORTANT PART OF THE CIRCULAR-DICHROISM OF MACROMOLECULES [J].

BUSTAMANTE, C ;

TINOCO, I ;

MAESTRE, MF .

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA-BIOLOGICAL SCIENCES, 1983, 80 (12) :3568-3572

[2]

Chandrasekhar, 1992, LIQ CRYST

[3] Optimization of opto-electronic property and device efficiency of polyfluorenes by tuning structure and morphology [J].

Chen, P ;

Yang, GZ ;

Liu, TX ;

Li, TC ;

Wang, M ;

Huang, W .

POLYMER INTERNATIONAL, 2006, 55 (05) :473-490

[4] Molecular packing in crystalline poly(9,9-di-n-octyl-2,7-fluorlene) [J].

Chen, SH ;

Chou, HL ;

Su, AC ;

Chen, SA .

MACROMOLECULES, 2004, 37 (18) :6833-6838

[5] Phase behavior of poly(9,9-di-n-hexyl-2,7-fluorene) [J].

Chen, SH ;

Su, AC ;

Su, CH ;

Chen, SA .

JOURNAL OF PHYSICAL CHEMISTRY B, 2006, 110 (09) :4007-4013

[6] Noncrystalline phases in poly(9,9-di-n-octyl-2,7-fluorene) [J].

Chen, SH ;

Su, AC ;

Chen, SA .

JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (20) :10067-10072

[7] Packing and uniaxial alignment of liquid crystalline oligofluorenes [J].

Chi, CY ;

Lieser, G ;

Enkelmann, V ;

Wegner, G .

MACROMOLECULAR CHEMISTRY AND PHYSICS, 2005, 206 (16) :1597-1609

[8] High luminescence polarized polymer light-emitting diodes fabricated using aligned polyfluorene [J].

Chung, SF ;

Wen, TC ;

Chou, WY ;

Guo, TF .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 2006, 45 (1-3) :L60-L63

[9] Chain conformations and photoluminescence of poly(di-n-octylfluorene) -: art. no. 107402 [J].

Chunwaschirasiri, W ;

Tanto, B ;

Huber, DL ;

Winokur, MJ .

PHYSICAL REVIEW LETTERS, 2005, 94 (10)

[10] The chiroptical properties of a thermally annealed film of chiral substituted polyfluorene depend on film thickness [J].

Craig, MR ;

Jonkheijm, P ;

Meskers, SCJ ;

Schenning, APHJ ;

Meijer, EW .

ADVANCED MATERIALS, 2003, 15 (17) :1435-1438

← 1 2 3 4 5 →