There are no files associated with this item.
Full metadata record
DC Field | Value | Language |
---|---|---|
dc.citation.endPage | 12699 | - |
dc.citation.number | 30 | - |
dc.citation.startPage | 12693 | - |
dc.citation.title | JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | - |
dc.citation.volume | 134 | - |
dc.contributor.author | Neilson, Bethany M. | - |
dc.contributor.author | Bielawski, Christopher W. | - |
dc.date.accessioned | 2023-12-22T04:45:19Z | - |
dc.date.available | 2023-12-22T04:45:19Z | - |
dc.date.created | 2020-07-10 | - |
dc.date.issued | 2012-08 | - |
dc.description.abstract | A 4,5-dithienylimidazolium salt was found to undergo electrocyclic isomerization upon exposure to UV radiation (lambda(irr) = 313 nm) under neutral and basic conditions; subsequent exposure to visible light reversed the reaction. Under ambient light and in the presence of base, the imidazolium species catalyzed transesterifications as well as amidations in a manner similar to those of previously reported N-heterocyclic carbene precatalysts. However, upon UV irradiation to effect the aforementioned photocyclization, the rate of the transesterification reaction between vinyl acetate and allyl alcohol was significantly attenuated (k(vis/UV) = 12.5), as was the rate of the condensation of ethyl acetate with aminoethanol (k(vis/UV) = 100). The rates of these reactions were successfully toggled between fast and slow states by alternating exposure to visible and UV light, respectively, thus demonstrating a rare example of a photoswitchable catalyst that operates via photomodulation of its electronic structure. | - |
dc.identifier.bibliographicCitation | JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, v.134, no.30, pp.12693 - 12699 | - |
dc.identifier.doi | 10.1021/ja304067k | - |
dc.identifier.issn | 0002-7863 | - |
dc.identifier.scopusid | 2-s2.0-84864481193 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/33130 | - |
dc.identifier.url | https://pubs.acs.org/doi/10.1021/ja304067k | - |
dc.identifier.wosid | 000306942600064 | - |
dc.language | 영어 | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.title | Photoswitchable Organocatalysis: Using Light To Modulate the Catalytic Activities of N-Heterocyclic Carbenes | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Multidisciplinary | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.type.docType | Article | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordPlus | RING-OPENING POLYMERIZATION | - |
dc.subject.keywordPlus | LIGANDS | - |
dc.subject.keywordPlus | DIARYLETHENE | - |
dc.subject.keywordPlus | COMPLEXES | - |
dc.subject.keywordPlus | TRANSESTERIFICATION/ACYLATION | - |
dc.subject.keywordPlus | REACTIVITY | - |
dc.subject.keywordPlus | COORDINATION | - |
dc.subject.keywordPlus | PHOTOCONTROL | - |
dc.subject.keywordPlus | IMIDAZOLIUM | - |
dc.subject.keywordPlus | DERIVATIVES | - |
Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Tel : 052-217-1404 / Email : scholarworks@unist.ac.kr
Copyright (c) 2023 by UNIST LIBRARY. All rights reserved.
ScholarWorks@UNIST was established as an OAK Project for the National Library of Korea.