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Article: A Formaldehyde Sensor Based on Self-Assembled Monolayers of Oxidized Thiophene Derivatives

TitleA Formaldehyde Sensor Based on Self-Assembled Monolayers of Oxidized Thiophene Derivatives
Authors
Issue Date2021
PublisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/langmuir
Citation
Langmuir, 2021, v. 37 n. 19, p. 5916-5922 How to Cite?
AbstractHigh-performance formaldehyde sensors play an important role in air quality assessment. Herein, a self-assembled monolayer (SAM) sensor for trace formaldehyde (FA) is fabricated based on the fluorescence enhancement of oxidized thiophene derivatives. In the primary SAM molecules, the functional backbone trithiophene (3T) links to the anchor through an n-propyl group. The anchor with an active Si–Cl bond can form a covalent bond with the SiO2 substrate by solution incubation, which ensures good stability against organic solvents and high sensitivity via monolayer structures. With the alkyl chain’s leading, a dense 3T SAM can be obtained on SiO2. Upon exposure to UV light in the presence of oxygen, 3T can be oxidized into a nonfluorescent but coordination-active product with abundant carbonyl groups, which can be doped with FA and induce a blueshifted fluorescence. With this mechanism, we proposed an SAM-based FA sensor by detecting the enhancement of the blueshifted fluorescence. Reliable reversibility, selectivity, stability, and detection limit lower than 1 ppm are achieved in this system. The work provides an experimental basis for developing a cheap, efficient, and flexible sensor for trace FA detection.
Persistent Identifierhttp://hdl.handle.net/10722/301375
ISSN
2020 Impact Factor: 3.882
2020 SCImago Journal Rankings: 1.042

 

DC FieldValueLanguage
dc.contributor.authorLi, M-
dc.contributor.authorXie, K-
dc.contributor.authorWang, G-
dc.contributor.authorZheng, J-
dc.contributor.authorCAO, Y-
dc.contributor.authorWei, F-
dc.contributor.authorTu, H-
dc.contributor.authorTang, J-
dc.date.accessioned2021-07-27T08:10:08Z-
dc.date.available2021-07-27T08:10:08Z-
dc.date.issued2021-
dc.identifier.citationLangmuir, 2021, v. 37 n. 19, p. 5916-5922-
dc.identifier.issn0743-7463-
dc.identifier.urihttp://hdl.handle.net/10722/301375-
dc.description.abstractHigh-performance formaldehyde sensors play an important role in air quality assessment. Herein, a self-assembled monolayer (SAM) sensor for trace formaldehyde (FA) is fabricated based on the fluorescence enhancement of oxidized thiophene derivatives. In the primary SAM molecules, the functional backbone trithiophene (3T) links to the anchor through an n-propyl group. The anchor with an active Si–Cl bond can form a covalent bond with the SiO2 substrate by solution incubation, which ensures good stability against organic solvents and high sensitivity via monolayer structures. With the alkyl chain’s leading, a dense 3T SAM can be obtained on SiO2. Upon exposure to UV light in the presence of oxygen, 3T can be oxidized into a nonfluorescent but coordination-active product with abundant carbonyl groups, which can be doped with FA and induce a blueshifted fluorescence. With this mechanism, we proposed an SAM-based FA sensor by detecting the enhancement of the blueshifted fluorescence. Reliable reversibility, selectivity, stability, and detection limit lower than 1 ppm are achieved in this system. The work provides an experimental basis for developing a cheap, efficient, and flexible sensor for trace FA detection.-
dc.languageeng-
dc.publisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/langmuir-
dc.relation.ispartofLangmuir-
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in [JournalTitle], copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see [insert ACS Articles on Request author-directed link to Published Work, see http://pubs.acs.org/page/policy/articlesonrequest/index.html].-
dc.titleA Formaldehyde Sensor Based on Self-Assembled Monolayers of Oxidized Thiophene Derivatives-
dc.typeArticle-
dc.identifier.emailZheng, J: zjing@hku.hk-
dc.identifier.emailTang, J: jinyao@hku.hk-
dc.identifier.authorityTang, J=rp01677-
dc.description.naturelink_to_subscribed_fulltext-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1021/acs.langmuir.1c00396-
dc.identifier.pmid33909431-
dc.identifier.scopuseid_2-s2.0-85106499379-
dc.identifier.scopuseid_2-s2.0-85106499379-
dc.identifier.hkuros323379-
dc.identifier.volume37-
dc.identifier.issue19-
dc.identifier.spage5916-
dc.identifier.epage5922-
dc.publisher.placeUnited States-

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