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dc.contributor.authorChe, Yanke
dc.contributor.authorGross, Dustin E
dc.contributor.authorHuang, Helin
dc.contributor.authorYang, Dongjiang
dc.contributor.authorYang, Xiaomei
dc.contributor.authorDiscekici, Emre
dc.contributor.authorXue, Zheng
dc.contributor.authorZhao, Huijun
dc.contributor.authorMoore, Jeffrey S
dc.contributor.authorZang, Ling
dc.contributor.editorPeter J. Stang
dc.date.accessioned2017-05-03T15:55:35Z
dc.date.available2017-05-03T15:55:35Z
dc.date.issued2012
dc.date.modified2013-03-26T22:38:31Z
dc.identifier.issn0002-7863
dc.identifier.doi10.1021/ja300306e
dc.identifier.urihttp://hdl.handle.net/10072/49914
dc.description.abstractDevelopment of simple, cost-effective, and sensitive fluorescence-based sensors for explosives implies broad applications in homeland security, military operations, and environmental and industrial safety control. However, the reported fluorescence sensory materials (e.g., polymers) usually respond to a class of analytes (e.g., nitroaromatics), rather than a single specific target. Hence, the selective detection of trace amounts of trinitrotoluene (TNT) still remains a big challenge for fluorescence-based sensors. Here we report the selective detection of TNT vapor using the nanoporous fibers fabricated by self-assembly of carbazole-based macrocyclic molecules. The nanoporosity allows for time-dependent diffusion of TNT molecules inside the material, resulting in further fluorescence quenching of the material after removal from the TNT vapor source. Under the same testing conditions, other common nitroaromatic explosives and oxidizing reagents did not demonstrate this postexposure fluorescence quenching; rather, a recovery of fluorescence was observed. The postexposure fluorescence quenching as well as the sensitivity is further enhanced by lowering the highest occupied molecular orbital (HOMO) level of the nanofiber building blocks. This in turn reduces the affinity for oxygen, thus allocating more interaction sites for TNT. Our results present a simple and novel way to achieve detection selectivity for TNT by creating nanoporosity and tuning molecular electronic structure, which when combined may be applied to other fluorescence sensor materials for selective detection of vapor analytes.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.languageEnglish
dc.language.isoeng
dc.publisherAmerican Chemical Society
dc.publisher.placeUnited States
dc.relation.ispartofstudentpublicationN
dc.relation.ispartofpagefrom4978
dc.relation.ispartofpageto4982
dc.relation.ispartofissue10
dc.relation.ispartofjournalJournal of American Chemistry Society
dc.relation.ispartofvolume134
dc.rights.retentionY
dc.subject.fieldofresearchChemical sciences
dc.subject.fieldofresearchInorganic green chemistry
dc.subject.fieldofresearchcode34
dc.subject.fieldofresearchcode340204
dc.titleDiffusion-Controlled Detection of Trinitrotoluene: Interior Nanoporous Structure and Low Highest Occupied Molecular Orbital Level of Building Blocks Enhance Selectivity and Sensitivity
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.rights.copyrightSelf-archiving of the author-manuscript version is not yet supported by this journal. Please refer to the journal link for access to the definitive, published version or contact the authors for more information.
gro.date.issued2012
gro.hasfulltextNo Full Text
gro.griffith.authorZhao, Huijun


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