Site-isolated electro-optic chromophores based on substituted 2,2′-bis(3,4-propylenedioxythiophene) π-conjugated bridges

被引：96

作者：

Hammond, Scott R. ^{[1
]}

Clot, Olivier ^{[1
]}

Firestone, Kimberly A. ^{[1
]}

Bale, Denise H. ^{[1
]}

Lao, David ^{[1
]}

Haller, Marnie ^{[2
]}

Phelan, Gregory D. ^{[1
]}

Carlson, Brenden ^{[1
]}

Jen, Alex K. -Y. ^{[2
]}

Reid, Philip J. ^{[1
]}

Dalton, Larry R. ^{[1
]}

机构：

[1] Univ Washington, Dept Chem, Seattle, WA 98195 USA

[2] Univ Washington, Dept Mat Sci & Engn, Seattle, WA 98195 USA

来源：

CHEMISTRY OF MATERIALS | 2008年 / 20卷 / 10期

关键词：

D O I：

10.1021/cm800054y

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：

Application of bis(propylenedioxythiophene) (bis(ProDOT)) pi-conjugated bridges bearing alkyl or aryl substituents in electro-optic (EO) chromophores is presented. A series of three bis (ProDOT)-based chromophores and a bithiophene-based control chromophore were prepared and fully characterized with regard to EO applications. The highly planar bis(ProDOT) bridge results in slightly larger (similar to 10%) molecular hyperpolarizability (beta) values as compared to the bithiophene bridge, as measured by hyper-Rayleigh scattering at a variety of wavelengths. In amorphous polycarbonate guest-host films, however, the bulky substituents on the bis(ProDOT) bridge result in significantly larger (similar to 70%) poling-induced EO coefficient (r(33)) values, as measured by simple reflection ellipsometry at 1310nm. This can be attributed to a roughly 2-fold enhancement in poling efficiency due to reduced intermolecular dipole-dipole interactions. This chromophore architecture also exhibits excellent temporal alignment stability and photochemical stability as compared to benchmark AJL8, FTC, and CLD chromophore systems. Incorporation of the strong CF3-phenyl-substituted tricyano-furan (TCF) acceptor into a bis(ProDOT)based chromophore resulted in a beta(zzz)( - 2 omega;omega,omega) value at 1907 nm of 5700 +/- 400 x 10(-30) esu and an r(33) value of 69 +/- 14 pm/V at 32.8 total chromophore weight %.

引用

页码：3425 / 3434

页数：10

共 54 条

[1]

[Anonymous], POLED POLYM THEIR AP

[2]

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