Abstract
A bis-rhodamine based fluorescent chemosensor for naked-eye detection of Cu 2+ with enhanced sensitivity as compared to mono-rhodamine derivative has been synthesized, and its selectivity for Cu 2+ in the presence of other competitive metal ions (Li +, Na +, K +, Cs +, Mg 2+, Ca 2+, Sr 2+, Cr 3+, Mn 2+, Fe 2+, Fe 3+, Co 2+, Ni 2+, Zn 2+, Cd 2+, Hg 2+, and Pb 2+), and application in bio-imaging are demonstrated.
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