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Novel chromophores with excellent electro-optic activity based on double-donor chromophores by optimizing thiophene bridges.
- Source :
-
Dyes & Pigments . Nov2015, Vol. 122, p139-146. 8p. - Publication Year :
- 2015
-
Abstract
- Three novel nonlinear optical chromophores based on the same bis( N,N -diethyl)aniline donor have been synthesized and systematically characterized. These chromophores showed good thermal stability and chromophore y1 showed the best thermal stability of 249 °C. Besides, compared with the chromophore (y1) without the substituted group, chromophores y2 and y3 show better intramolecular charge-transfer absorption. Most importantly, the high molecular hyperpolarizability of these chromophores can be effectively translated into large electro-optic coefficients. The electro-optic coefficient of poled films containing 25% wt of chromophores y1–y3 doped in amorphous polycarbonate afforded values of 149, 138 and 157 pm/V at 1310 nm for chromophores y1–y3 respectively. These results indicated that the double donors of bis( N,N -diethyl)aniline unit can efficiently improve the electron-donating ability and the special structure can reduce intermolecular electrostatic interactions, thus enhancing the macroscopic electro-optic activity. These properties, together with good solubility, suggest the potential use of these chromophores as advanced materials. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 01437208
- Volume :
- 122
- Database :
- Academic Search Index
- Journal :
- Dyes & Pigments
- Publication Type :
- Academic Journal
- Accession number :
- 109126384
- Full Text :
- https://doi.org/10.1016/j.dyepig.2015.06.012