SYNTHESIS AND NONLINEAR-OPTICAL PROPERTIES OF END-GROUP MODIFIED AROMATIC ESTERS AS CHAINED CHROMOPHORES

Citation
T. Kimura et al., SYNTHESIS AND NONLINEAR-OPTICAL PROPERTIES OF END-GROUP MODIFIED AROMATIC ESTERS AS CHAINED CHROMOPHORES, Macromolecular chemistry and physics, 199(6), 1998, pp. 1193-1199
Citations number
10
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Polymer Sciences
ISSN journal
1022-1352
Volume
199
Issue
6
Year of publication
1998
Pages
1193 - 1199
Database
ISI
SICI code
1022-1352(1998)199:6<1193:SANPOE>2.0.ZU;2-P
Abstract
We synthesized aromatic ester derivatives with some electron accepting groups at molecular ends as new class of nonlinear optical (NLO) acti ve chromophores (ArESn-X, n = 2, 3, X = CN, CF3, NO2 DCV). Some second -order NLO properties for poled polymer films consisting of poly(methy l methacrylate) (PMMA) doped with 10 wt.-% ArESn-X (ArESn-X/PMMA) were investigated. UV/vis spectra of these polymer films have cutoff wavel engths (lambda(co)) of about 300 similar to 380 nm, which are much sho rter than in the case of p-nitroaniline (pNA) (lambda(co) = ca. 450 nm ) as a typical strong donor-acceptor (D-A) molecule. In addition, some of these polymer films exhibited larger second-order nonlinear coeffi cient (d(33)) values than PMMA film doped with 10 wt.-% pNA (pNA/PMMA) (2.8 x 10(-9) esu). Namely, ArES3-CN (d(33) = 3.1 X 10(-9) esu, 10 wt .-% in PMMA), ArES3-NO2 (3.0 x 10(-9) esu, 10 wt.-% in PMMA) and ArES2 -DCV (4.0 x 10(-9) esu, 10 wt.-% in PMMA) showed not only excellent se cond-order MLO activity but also excellent transparency in the visible region (lambda(co) = 304 nm (ArES3-CN), 340 nm (ArES3-NO2) and 370 nm (ArES2-DCV), respectively). Consequently, these compounds are believe d to be promising chromophores for second-order nonlinear optics.