DC Field | Value | Language |
---|---|---|
dc.contributor.author | Vishwakarma, Niraj K. | - |
dc.contributor.author | Hwang, Yoon-Ho | - |
dc.contributor.author | Adiyala, Praveen Reddy | - |
dc.contributor.author | Kim, Dong-Pyo | - |
dc.date.accessioned | 2019-04-07T15:51:23Z | - |
dc.date.available | 2019-04-07T15:51:23Z | - |
dc.date.created | 2019-01-16 | - |
dc.date.issued | 2018-12 | - |
dc.identifier.issn | 1944-8244 | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/95452 | - |
dc.description.abstract | Many efforts have been made on stimuli responsive switchable catalysis to trigger catalytic activity over various chemical reactions. However, the reported light-, pH- or chemically responsive organocatalysts are mostly incomplete in the aspects of shielding efficiency and long-term performance. Here, we advance the flow-assisted switchable catalysis of metal ions in a microenvelope system that allows the on-off catalysis mode on demand for long-lasting catalytic activity. Various metal-ion catalysts can be selectively embedded in a novel polymeric core-shell of the heteroarm star copolymer of poly(styrene) and poly(4-vinylpyridine) emanated from a polyhedral oligomeric silsesquioxane center. The immobilized core shell polymer on the inner wall of a poly(dimethylsiloxane) envelope microreactor shows on-off switching catalysis between the expanded active mode and contracted protective mode under continuous flow of solvents or subsequent dry conditions. In particular, the preserved catalytic activity of toxic Hg2+ for oxymercuration was demonstrated even for 2 weeks without leaching, whereas the activity of moisture-sensitive Ru3+ ions for polymerization of methyl methacrylate was maintained even after 5 days from an open atmosphere. It is practical that the tight environment of the enveloped microfluidic system facilitates cyclic switching between the reaction-"on" and- "off" modes of such toxic, sensitive/expensive catalysts for long-term prevention and preservation. | - |
dc.language | English | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.relation.isPartOf | ACS APPLIED MATERIALS & INTERFACES | - |
dc.title | Flow-Assisted Switchable Catalysis of Metal Ions in a Microenvelope System Embedded with Core-Shell Polymers | - |
dc.type | Article | - |
dc.identifier.doi | 10.1021/acsami.8b17926 | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | ACS APPLIED MATERIALS & INTERFACES, v.10, no.49, pp.43104 - 43111 | - |
dc.identifier.wosid | 000453488900136 | - |
dc.citation.endPage | 43111 | - |
dc.citation.number | 49 | - |
dc.citation.startPage | 43104 | - |
dc.citation.title | ACS APPLIED MATERIALS & INTERFACES | - |
dc.citation.volume | 10 | - |
dc.contributor.affiliatedAuthor | Kim, Dong-Pyo | - |
dc.identifier.scopusid | 2-s2.0-85058295948 | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.isOpenAccess | N | - |
dc.type.docType | Article | - |
dc.subject.keywordPlus | ORGANIC-SYNTHESIS | - |
dc.subject.keywordPlus | STAR | - |
dc.subject.keywordPlus | ARYLLITHIUMS | - |
dc.subject.keywordPlus | INTEGRATION | - |
dc.subject.keywordPlus | PROPARGYL | - |
dc.subject.keywordPlus | CHEMISTRY | - |
dc.subject.keywordPlus | HYDRATION | - |
dc.subject.keywordPlus | ALKYNE | - |
dc.subject.keywordPlus | GREEN | - |
dc.subject.keywordPlus | LIGHT | - |
dc.subject.keywordAuthor | hazardous/sensitive chemistry | - |
dc.subject.keywordAuthor | heteroarm star copolymers | - |
dc.subject.keywordAuthor | stimulus-responsive polymers | - |
dc.subject.keywordAuthor | catalyst immobilization | - |
dc.subject.keywordAuthor | switchable catalysis | - |
dc.subject.keywordAuthor | microfluidic chemistry | - |
dc.relation.journalWebOfScienceCategory | Nanoscience & Nanotechnology | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Science & Technology - Other Topics | - |
dc.relation.journalResearchArea | Materials Science | - |
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