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Spectrochim Acta A Mol Biomol Spectrosc. 2015;151:48-55. doi: 10.1016/j.saa.2015.06.078. Epub 2015 Jun 23.

A new dual fluorogenic and chromogenic "turn-on" chemosensor for Cu²⁺/F⁻ ions.

Author information

1
Department of Advanced Organic Materials and Textile System Engineering, Chungnam National University, Daejeon 305-764, South Korea.
2
School of Chemistry Science & Technology, Zhanjiang Normal University, Development Center for New Material Engineering & Technology in Universities of Guangdong, Zhanjiang 524048, PR China. Electronic address: wang_sheng@ymail.com.
3
School of Chemistry Science & Technology, Zhanjiang Normal University, Development Center for New Material Engineering & Technology in Universities of Guangdong, Zhanjiang 524048, PR China.
4
Graduate School of Environment and Information Sciences Yokohama National University, 79-7 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan.
5
Department of Advanced Organic Materials and Textile System Engineering, Chungnam National University, Daejeon 305-764, South Korea. Electronic address: yason@cnu.ac.kr.

Abstract

Turn "off-on" chemosensor 2-(-2-((3',6'-bis(diethylamino)-3-oxospiro[isoindoline-1,9'-xanthen]-2-yl)imino)ethylidene)-N-phenylhydrazine-1-carbothioamide (RBS) was designed and synthesized. Using the naked eye, RBS showed favorable observation characteristics with both Cu(2+) and F(-) ions. The various modes of sensitivity shown by RBS toward the Cu(2+) and F(-) ions were investigated by spectral techniques, including UV-Vis, fluorescence and (1)H NMR spectroscopy. The Job's plot indicated the formation of 1:1 complex between RBS and Cu(2+)/F(-). The binding constant of the RBS-guest(-) complexes were found to be 1.3×10(4) and 6.2×10(3)M(-1) for the RBS-Cu(2+) and RBS-F(-), respectively.

KEYWORDS:

Copper; Dual sensor; Fluoride; Rhodamine B; Thiourea

PMID:
26125982
DOI:
10.1016/j.saa.2015.06.078
[Indexed for MEDLINE]

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