Journal
OPTICAL MATERIALS
Volume 79, Issue -, Pages 38-44Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optmat.2018.03.021
Keywords
Rhodamine-B; Chemosensor; Aluminum (III) ion; Naked eye detection
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Funding
- Anna Centenary Research Fellowship (ACRF), Anna University, Chennai [CR/ACRF/2013/38]
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A new rhodamine-based colorimetric and fluorescent turn-on chemosensor (L) has been designed and synthesized for selective and sensitive detection of Al3+ ion. The sensing behavior toward metal ion was investigated by UV/Vis and fluorescence spectroscopy. Upon addition of Al3+ ion to solution of L provided a visual color change as well as significantly fluorescent enhancement, while other metal ions including Na+, Mg2+, K+, Mn2+, Fe3+, Ni2+, Cu2+, Zn2+, Pb2+, Cd2+ and Hg2+ ions fails to generate a distinct color and spectral changes, the distinct color change and rapid switch-on fluorescence also provide naked eye detection for Al2+ ion. The mechanism involved equilibrium between non-fluorescent spirocyclic form and highly fluorescent ring open form process was utilized and 1:2 stoichiometry for L-Al3+ complex formed with an association constant of 1.42 x 10(3) M-1. Moreover, chemosensor L was applied for living cell imaging and confirmed that can be used as a fluorescent probe for monitoring Al3+ ion in living cells. (C) 2018 Elsevier B.V. All rights reserved.
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