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Rhodamine‐Immobilised Electrospun Chitosan Nanofibrous Material as a Fluorescence Turn‐On Hg 2+ Sensor
Author(s) -
Horzum Nesrin,
Mete Derya,
Karakuş Erman,
Üçüncü Muhammed,
Emrullahoğlu Mustafa,
Demir Mustafa M.
Publication year - 2016
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201600027
Subject(s) - fluorophore , rhodamine , chitosan , fluorescence , rhodamine b , moiety , electrospinning , chemistry , hydrazide , metal ions in aqueous solution , nanofiber , selectivity , photochemistry , ion , combinatorial chemistry , nanotechnology , materials science , catalysis , organic chemistry , polymer , optics , physics , photocatalysis
A turn‐on fluorescence sensing system for mercuric (Hg 2+ ) ions relying on a modified rhodamine B–chitosan fluorophore moiety was developed. This novel sensing approach relies on the simultaneous electrospinning of chitosan and rhodamine B hydrazide with phenylisothiocyanate functionality in hexafluoroisopropanol solution at 3.4 kV cm −1 . The electrospun mats exhibited not only considerably enhanced fluorescence intensity in the presence of mercury ions, a result attributed to the ring opening of the spirolactam unit of the rhodamine‐based fluorophore, but also a remarkably high sensitivity and selectivity toward Hg 2+ . In effect, the strategy has the potential to open new avenues in the design and development of other high‐performance nanofibrous sensing materials for detecting target metal species of environmental interest.