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DC Field | Value | Language |
---|---|---|
dc.citation.endPage | 4224 | - |
dc.citation.number | 18 | - |
dc.citation.startPage | 4219 | - |
dc.citation.title | PHYSICAL CHEMISTRY CHEMICAL PHYSICS | - |
dc.citation.volume | 1 | - |
dc.contributor.author | Tsutsumi, O | - |
dc.contributor.author | Kanazawa, A | - |
dc.contributor.author | Shiono, T | - |
dc.contributor.author | Ikeda, T | - |
dc.contributor.author | Park, Lee Soon | - |
dc.date.accessioned | 2023-12-22T12:10:17Z | - |
dc.date.available | 2023-12-22T12:10:17Z | - |
dc.date.created | 2015-09-23 | - |
dc.date.issued | 1999-09 | - |
dc.description.abstract | Photoinduced nematic (N)-to-isotropic (I) and thermal I-N phase transition behaviour of liquid crystals (LCs) with donor-acceptor azobenzenes was investigated. Photoirradiation of mixtures of the azobenzenes and host LC resulted in N-I phase transition due to trans-cis photoisomerisation of the azobenzenes, and the N phase recovered when the irradiated sample was kept in the dark because of thermal cis-trans back-isomerisation. Time-resolved measurements with a laser pulse (355 or 532 nm; 10 ns fwhm) revealed that the photoinduced N-I phase transition took place within 200-300 mu s in all samples. The rate of the thermal I-N phase transition was affected strongly by the strength of the donor and the acceptor. The response time of the thermal I-N phase transition corresponded closely to the lifetime of the cis isomer of the azobenzenes, hence we can conclude that the rate-determining step of the thermal recovery of the N phase was the cis-trans isomerisation process. The time necessary for the thermal I-N phase transition decreased with increasing donor and acceptor strength, because the thermal cis-trans isomerisation of the azobenzene with a stronger donor-acceptor pair became faster. The N phase recovered within 500 ms in the mixture of the azobenzene (with tertiary amine as the donor and nitro group as the acceptor) and host LC at 37 degrees C | - |
dc.identifier.bibliographicCitation | PHYSICAL CHEMISTRY CHEMICAL PHYSICS, v.1, no.18, pp.4219 - 4224 | - |
dc.identifier.doi | 10.1039/a905172d | - |
dc.identifier.issn | 1463-9076 | - |
dc.identifier.scopusid | 2-s2.0-0033568835 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/17103 | - |
dc.identifier.url | http://pubs.rsc.org/en/Content/ArticleLanding/1999/CP/A905172D#!divAbstract | - |
dc.identifier.wosid | 000082601000012 | - |
dc.language | 영어 | - |
dc.publisher | ROYAL SOC CHEMISTRY | - |
dc.title | Photoinduced phase transition of nematic liquid crystals with donor-acceptor azobenzenes: mechanism of the thermal recovery of the nematic phase | - |
dc.type | Article | - |
dc.description.journalRegisteredClass | scopus | - |
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