Excited-state intramolecular proton transfer on 2-(2 '-hydroxy-4 '-R-phenyl)benzothiazole nanoparticles and fluorescence wavelength depending on substituent and temperature
DC Field | Value | Language |
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dc.contributor.author | Kim, Yong Hee | - |
dc.contributor.author | Roh, Soo-Gyun | - |
dc.contributor.author | Jung, Sang-Don | - |
dc.contributor.author | Chung, Myung-Ae | - |
dc.contributor.author | Kim, Hwan Kyu | - |
dc.contributor.author | Cho, Dae Won | - |
dc.date.accessioned | 2021-09-08T10:32:11Z | - |
dc.date.available | 2021-09-08T10:32:11Z | - |
dc.date.created | 2021-06-11 | - |
dc.date.issued | 2010 | - |
dc.identifier.issn | 1474-905X | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/118701 | - |
dc.description.abstract | The fluorescence emission properties of 2-(2'-hydroxy-4'-R-phenyl) benzothiazole (HBT-R) nanoparticles with different substituents (R = - COOH, -H, -CH3, -OH, and -OCH3) were investigated using spectroscopic and theoretical methods. HBT-Rs displayed dual enol and keto (excited-state intramolecular proton transfer (ESIPT)) emissions in nonpolar solvents. The spectral change of their ESIPT emissions was affected differently by the electron donating (or withdrawing) power of the substituents; a bathochromic shift for the electron donating group and a hypsochromic shift in electron withdrawing group. In addition, the changes in energy levels calculated by the ab initio method were consistent with the spectral shifts of HBT-R in solution. We prepared aggregated HBT-R nanoparticles using a simple reprecipitation process in tetrahydrofuran-water solvents. The ESIPT emission of aggregated HBT-R nanoparticles was strongly enhanced (over 45 times) compared to those of monomer HBT-Rs in toluene, as markedly shifted ESIPT emissions are observed at longer wavelength without any quenching by self-absorption. Aggregated HBT-R nanoparticles showed longer lifetimes than those of monomer molecules. The temperature effect on the aqueous dispersion of the aggregated HBT-R nanoparticles was also explored. It shows a fluorescent ratiometric change in a range of temperature from 7 to 65 degrees C. A mechanism of a temperature-dependent equilibrium between the nanoparticles and the solvated enols is proposed for the emission color change. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | ROYAL SOC CHEMISTRY | - |
dc.subject | EMISSION | - |
dc.subject | MECHANISM | - |
dc.subject | EFFICIENCIES | - |
dc.subject | SOLVENT | - |
dc.subject | PROBES | - |
dc.title | Excited-state intramolecular proton transfer on 2-(2 '-hydroxy-4 '-R-phenyl)benzothiazole nanoparticles and fluorescence wavelength depending on substituent and temperature | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Kim, Hwan Kyu | - |
dc.contributor.affiliatedAuthor | Cho, Dae Won | - |
dc.identifier.doi | 10.1039/b9pp00102f | - |
dc.identifier.scopusid | 2-s2.0-77951944571 | - |
dc.identifier.wosid | 000277318300014 | - |
dc.identifier.bibliographicCitation | PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES, v.9, no.5, pp.722 - 729 | - |
dc.relation.isPartOf | PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES | - |
dc.citation.title | PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES | - |
dc.citation.volume | 9 | - |
dc.citation.number | 5 | - |
dc.citation.startPage | 722 | - |
dc.citation.endPage | 729 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.description.journalRegisteredClass | kci | - |
dc.description.journalRegisteredClass | other | - |
dc.relation.journalResearchArea | Biochemistry & Molecular Biology | - |
dc.relation.journalResearchArea | Biophysics | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalWebOfScienceCategory | Biochemistry & Molecular Biology | - |
dc.relation.journalWebOfScienceCategory | Biophysics | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Physical | - |
dc.subject.keywordPlus | EMISSION | - |
dc.subject.keywordPlus | MECHANISM | - |
dc.subject.keywordPlus | EFFICIENCIES | - |
dc.subject.keywordPlus | SOLVENT | - |
dc.subject.keywordPlus | PROBES | - |
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