Rhodamine-Immobilised Electrospun Chitosan Nanofibrous Material as a Fluorescence Turn-On Hg<SUP>2+</SUP> Sensor

Horzum N., Mete D., Karakus E., ÜÇÜNCÜ M., Emrullahoglu M., Demir M. M.

CHEMISTRYSELECT, cilt.1, sa.5, ss.896-900, 2016 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 1 Sayı: 5
  • Basım Tarihi: 2016
  • Doi Numarası: 10.1002/slct.201600027
  • Dergi Adı: CHEMISTRYSELECT
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.896-900
  • Anahtar Kelimeler: Chitosan, fluorescence imaging, mercury sensing, nanofibre, rhodamine
  • Dokuz Eylül Üniversitesi Adresli: Hayır

Özet

A turn-on fluorescence sensing system for mercuric (Hg2+) 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 Hg2+. 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.