TY - JOUR
T1 - Formation of an emissive telluroxide promoted by Hg2+ in aqueous environment: A new naked-eye and ratiometric rhodamine dimer fluorescent mercury(II) probe
AU - Soares-Paulino, Antônio A.
AU - Giroldo, Lilian
AU - Celante, Gizele
AU - Lodeiro, Carlos
AU - Dos Santos, Alcindo A.
N1 - Sem PDF conforme despacho.
info:eu-repo/grantAgreement/FCT/5876/147218/PT#
A. A. Dos Santos and A. A. Soares-Paulino (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 gs3:University of Sao Paulo through the NAP-CatSinQ (Research Core in Catalysis and Chemical Synthesis). A. A. Dos Santos and C. Lodeiro are also thanks to the CNPq program, Science without borders 2014-2016 for the "Special Guest Researcher" grant (Brazil). C. Lodeiro thanks The Associate Laboratory Research Unit for Green Chemistry - Clean Processes and Technologies - LAQV which is financed by national 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 the Scientific Society PROTEOMASS (Portugal) for funding support (General Funding Grant).
PY - 2018/12/1
Y1 - 2018/12/1
N2 - A new chemosensor based on tellurium-rhodamine B (TRB) for the fast and selective detection of Hg2+ in aqueous medium was designed and synthetized in only two steps from a symmetrical organic telluride and rhodamine B. The structure of TRB was determined by RMN, HRMS and IR and its photophysical properties were determined in MeCN/H2O 75:25 v/v. TRB is able to detect Hg2+ in solutions diluted until 1.71 μmol/L and containing until 75% of water in it. In the presence of Hg2+, TRB presents an intense pink color with maximum absorption in 558 nm (log ε = 4.93) and a strong fluorescence emission with maximum intensity in 582 nm (Φ = 0.17). The detection of Hg2+ by TRB occurs by the oxidation of the tellurium promoted by Hg2+, where a redox mechanism was proposed. Even the detection of Hg2+ occurring by the oxidation of tellurium, TRB presented a high selectivity for Hg2+, even when several ROS (H2O2, KNO2, NaOCl, NaONOO e KO2) were submitted to the screening.
AB - A new chemosensor based on tellurium-rhodamine B (TRB) for the fast and selective detection of Hg2+ in aqueous medium was designed and synthetized in only two steps from a symmetrical organic telluride and rhodamine B. The structure of TRB was determined by RMN, HRMS and IR and its photophysical properties were determined in MeCN/H2O 75:25 v/v. TRB is able to detect Hg2+ in solutions diluted until 1.71 μmol/L and containing until 75% of water in it. In the presence of Hg2+, TRB presents an intense pink color with maximum absorption in 558 nm (log ε = 4.93) and a strong fluorescence emission with maximum intensity in 582 nm (Φ = 0.17). The detection of Hg2+ by TRB occurs by the oxidation of the tellurium promoted by Hg2+, where a redox mechanism was proposed. Even the detection of Hg2+ occurring by the oxidation of tellurium, TRB presented a high selectivity for Hg2+, even when several ROS (H2O2, KNO2, NaOCl, NaONOO e KO2) were submitted to the screening.
KW - Fluorescent sensor
KW - Mercury
KW - Nacked-eye&zerowidthspace
KW - Tellurium
KW - Telluroxide
UR - http://www.scopus.com/inward/record.url?scp=85048726257&partnerID=8YFLogxK
U2 - 10.1016/j.dyepig.2018.06.005
DO - 10.1016/j.dyepig.2018.06.005
M3 - Article
AN - SCOPUS:85048726257
SN - 0143-7208
VL - 159
SP - 121
EP - 127
JO - Dyes and Pigments
JF - Dyes and Pigments
T2 - 3rd International Caparica Conference on Chromogenic and Emissive Materials
Y2 - 3 September 2018 through 6 September 2018
ER -