Oxidation of tellurium dyes induced by mercury: More insights on the naked-eye and fluorescent Hg2+ detection


A new fluorescent probe based on Tellurium-Rhodamine (TR) was designed, synthetized and fully characterized by H-1 NMR, C-13 NMR, Te-125 NMR, HRMS, IR and single crystal X-ray diffraction. A mechanism of Hg2+ detection, based on the oxidation of tellurium by Hg2+ was observed and fully understood. The new monomer chemosensor TR shows a high fluorescent quantum yield Phi = 0.41, excellent selectivity and good sensibility towards Hg2+, with a limit of detection of 2.95 mu mol/L.



subject category

Chemistry; Engineering; Materials Science


Soares-Paulino, AA; Giroldo, L; Celante, G; Oliveira, E; Santos, SM; Mendes, RF; Paz, FAA; Fioroto, AM; Oliveira, PV; Serrano, SHP; Lodeiro, C; Dos Santos, AA

our authors


A. A. D. S. and A. A. S.-P. (CNPq scholarship holder - Brazil) are thankful to CNPq (141454/2013-0, 207311/2015-3 and 153759/2016-0), FAPESP (2016/09579-0) and also to the financial and structural support offered by the University of Sao Paulo through the NAP-CatSinQ (Research Core in Catalysis and Chemical Synthesis). P. V. O. and A. M. F are thankful to FAPESP research grant (2017/2599-2). C.L. E.O. and A.A.S.P thanks the Associate Laboratory Research Unit for Green Chemistry - Clean Processes and Technologies - LAQV which is financed by Portuguese funds from FCT/MEC (UID/QUI/50006/2013) and co-financed by the ERDF under the PT2020 Partnership Agreement (POCI-01-0145-FEDER- 007265), and to the general funds of PROTEOMASS Scientific Society. E. O. thanks to the FCT-MEC Portugal by the grant number SFRH/BPD/108660/2015. S. M. S. acknowledges the financial support from CICECO-Aveiro Institute of Materials, POCI-01-0145-FEDER-007679 (FCT Ref. UID/CTM/50011/2013), financed by Portuguese funds through the FCT/MEC and when appropriate co-financed by FEDER under the PT2020 Partnership Agreement, and the IF program (IF/00973/2014) from FCT. S. H. P. S. acknowledges the financial support from CNPq and FAPESP.

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