Journal
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
Volume 157, Issue -, Pages 164-169Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2015.12.031
Keywords
Rhodamine B; Colorimetric probe; Cu2+; Spirolactam
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Funding
- Science Technology Foundation Creative Research Group of HBDE [T201311]
- National Natural Science Foundation of China [21501055]
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A new colorimetric probe 1 based on rhodamine B lactam was developed for naked-eye detection of Cu2+. The optical feature of 1 for Cu2+ was investigated by UV-vis absorption spectroscopy. Upon the addition of Cu2+, the 1 displayed a distinct color change from colorless to pink, which can be directly detected by the naked eye. The stoichiometry of 1 to Cu2+ complex was found to be 1:1 and the naked-eye detection limit was determined as low as 2 mu M. The results suggest that the probe 1 may provide a convenient method for visual detection of Cu2+ with high sensitivity. 2015 Elsevier B.V. All rights reserved.
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