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Introduction of fluorine to change the dielectric environment of nonlinear optical chromophores for improved electro-optic activities.

Authors :
Wu, Jieyun
Wang, Wen
Wang, Lingfang
Liu, Jialei
Chen, Kaixin
Bo, Shuhui
Source :
Materials Letters. Feb2016, Vol. 164, p636-639. 4p.
Publication Year :
2016

Abstract

Fluorine was non-conjugatedly linked to the donor of nonlinear optical chromophore to investigate the effect of highly electronegative fluorine on intramolecular charge-transfer and electro-optic activities. 1 HNMR spectra and UV–vis absorption were used to investigate that introduction of fluorine change the dielectric environment of intramolecular charge-transfer. Fluorinated chromophore showed more intensified absorption and its absorption properties was more stable to dielectric change in solution. In solid state of guest-host electro-optic polymer films, this dielectric environment stabilization was revealed to attenuate the dipole–dipole interactions of chromophores. Higher electro-optic coefficients (148 pm/V) and higher chromophore loading density (30 wt%) of fluorinated material chr-2/APC than benchmark material chr-1/APC (116 pm/V at 25 wt%) was achieved. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
0167577X
Volume :
164
Database :
Academic Search Index
Journal :
Materials Letters
Publication Type :
Academic Journal
Accession number :
111419083
Full Text :
https://doi.org/10.1016/j.matlet.2015.11.081