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Dalton Trans. 2013 Apr 7;42(13):4464-9. doi: 10.1039/c3dt32546f.

A pentacenequinone derivative with aggregation-induced emission enhancement characteristics for the picogram detection of Fe(3+) ions in mixed aqueous media.

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Department of Chemistry, UGC-Centre for Advanced Studies-1, Guru Nanak Dev University, Amritsar, Punjab, India.


The binding behavior of nanoaggregates of pentacenequinone derivative 1 having thiophene groups has been investigated toward various cations (Fe(3+), Fe(2+), Pd(2+), Mg(2+), Cd(2+), Hg(2+), Ni(2+), Zn(2+), Cu(2+), Pb(2+), Co(2+), K(+), Na(+) and Li(+)) using UV-vis and fluorescence spectroscopy. Among the various cations tested, nanoaggregates of compound 1 show a selective and sensitive response towards ferric ions. Further, the paper strips coated with a solution of nanoaggregates of 1 can detect ferric ions at the picogram level, thus providing a simple, portable and low cost method for the detection of ferric ions at the picogram level in aqueous solution.

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