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dc.contributor.authorSong, Jieyao
dc.contributor.authorZhou, Hongjian
dc.contributor.authorGao, Rui
dc.contributor.authorZhang, Yong
dc.contributor.authorZhang, Haimin
dc.contributor.authorZhang, Yunxia
dc.contributor.authorWang, Guozhong
dc.contributor.authorWong, Po Keung
dc.contributor.authorZhao, Huijun
dc.date.accessioned2019-06-10T01:35:22Z
dc.date.available2019-06-10T01:35:22Z
dc.date.issued2018
dc.identifier.issn2379-3694
dc.identifier.doi10.1021/acssensors.8b00038
dc.identifier.urihttp://hdl.handle.net/10072/378676
dc.description.abstractSelective determination of aquatic chromium is critically important because of the dramatic differences in health and environment impacts by trivalent and hexavalent forms of chromium; however, it is challenging. In this work, for the first time, a nonconjugated polymer fluorophore (GCPF) was synthesized by cross-linking chitosan with glutaraldehyde via Schiff base reactions and systematically investigated for selective determination of Cr(VI). The results revealed that the synthesized GCPF exhibited excellent photostability and water solubility. More importantly, GCPF possessed dramatically enhanced fluorescence intensity originated from the n−π* transitions of the Schiff base subfluorophore groups (e.g., C═N) that can be selectively and sensitively quenched by Cr(VI) through oxidative damages to C═N group. An effective EDTA masking agent approach was employed to minimize ionic interferences. In the presence of high concentration of interference ions including Cr(III), the quenching GCPF fluorescence is capable of selectively determining Cr(VI) within a concentration range up to 50 μM and a detection limit of 0.22 μM. The analytical performance of GCPF was also confirmed by analyzing real surface water and industrial samples.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherAmerican Chemical Society
dc.publisher.placeUnited States of America
dc.relation.ispartofpagefrom792
dc.relation.ispartofpageto798
dc.relation.ispartofissue4
dc.relation.ispartofjournalACS Sensors
dc.relation.ispartofvolume3
dc.subject.fieldofresearchAnalytical chemistry
dc.subject.fieldofresearchBiomedical engineering
dc.subject.fieldofresearchNanotechnology
dc.subject.fieldofresearchNanotechnology not elsewhere classified
dc.subject.fieldofresearchcode3401
dc.subject.fieldofresearchcode4003
dc.subject.fieldofresearchcode4018
dc.subject.fieldofresearchcode401899
dc.titleSelective Determination of Cr(VI) by Glutaraldehyde Cross-Linked Chitosan Polymer Fluorophores
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.hasfulltextNo Full Text
gro.griffith.authorZhao, Huijun


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