In:
New Journal of Chemistry, Royal Society of Chemistry (RSC), Vol. 47, No. 19 ( 2023), p. 9203-9211
Abstract:
A series of Y-type chromophores L1–L3 containing bis( N , N -diethyl)aniline, bis( N -ethyl- N -phenylsilylethyl)aniline, and bis(3-phenylsilylpiperidin)aniline as electron donors, isophorone derivatives as a p-conjugated bridge, and phenyl-trifluoromethyl-tricyanofuran acceptors (CF 3 -TCF) as an acceptor were synthesized and investigated. However, the introduction of stronger acceptors does not guarantee the increase of electro-optical coefficients for all the chromophores. Chromophore L1 only achieved an r 33 value of 110 pm V −1 due to its large absorption at 1310 nm. Poled films of 100 wt% chromophores L2–L3 showed high poling efficiencies and electro-optic coefficient due to large steric hindrance and hyperpolarizability of the chromophores. An ultrahigh r 33 (351 pm V −1 and 277 pm V −1 ) and poling efficiency (3.50 + 0.10 nm 2 V −2 and 2.63 ± 0.08 nm 2 V −2 ) at 1310 nm were achieved for the film containing 100 wt% chromophores L2–L3. These results indicate that the rational match between the strength of the donor, acceptor, and p-conjugated bridge plays an important role in achieving a large electro-optic coefficient.
Type of Medium:
Online Resource
ISSN:
1144-0546
,
1369-9261
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2023
detail.hit.zdb_id:
622959-1
detail.hit.zdb_id:
1472933-7
