Nanomolar Detection of Palladium (II) through a Novel Seleno-Rhodamine-based fluorescent and colorimetric chemosensor

Author(s)

Soares-Paulino, Antonio A. ^{[1, 2]} ; Giroldo, Lilian ^[1] ; Pradie, Noriberto A. ^[1] ; Reis, Joel S. ^[3] ; Back, Davi F. ^[4] ; Braga, Ataualpa A. C. ^[1] ; Stefani, Helio A. ^[3] ; Lodeiro, Carlos ^{[5, 2]} ; Dos Santos, Alcindo A. ^[1]

Affiliation

^[1] Univ Sao Paulo, Inst Quim, Dept Quim Fundamental, Av Prof Lineu Prestes 748, BR-05508000 Sao Paulo, SP - Brazil

^[2] NOVA Univ Sch, NOVA Sci & Technol Sch, Chem Dept, BIOSCOPE Grp, LAQV REQUIMTE, P-2829516 Caparica - Portugal

^[3] Univ Sao Paulo, Fac Ciencias Farmaceut, Dept Farm, Av Prof Lineu Prestes 580, BR-05508000 Sao Paulo, SP - Brazil

^[4] Univ Fed Santa Maria, Dept Quim, Lab Mat Inorgan, Av Roraima 1000, BR-97105900 Santa Maria, RS - Brazil

^[5] Proteomass Sci Soc, Rua Inventores, Madan Pk, P-2829516 Caparica - Portugal

• Document type: Journal article
• Source: DYES AND PIGMENTS; v. 179, AUG 2020.
• Web of Science Citations: 0

Abstract

A novel reversible fluorescent probe for Pd2+ based on a rhodamine-containing selenide (Rh-Se) was designed, synthesized and fully characterized. The probe Rh-Se showed a high selectivity and sensitivity with a detection limit of 32 nM for Pd2+ ions. The formation of a complex Rh-Se/Pd2+ was confirmed by HRMS. DFT calculations revealed that the proposed square planar geometry is the most stable form of the metallic complex Rh-Se/Pd2+. The probe Rh-Se showed to have high potential for the detection of residual Pd2+ in synthetic cross-coupling products and simulated pharmaceutical Pd2+- contaminated products. (AU)

• FAPESP's process: 15/01491-3 - Theoretical study of cross-coupling reactions: homogeneous and heterogeneous catalysis
• Grantee: Ataualpa Albert Carmo Braga
• Support type: Regular Research Grants
• FAPESP's process: 14/25770-6 - New frontiers in cross-coupling reactions promoted by palladium: combining enantioselective catalysis, C-H activations, new materials and in flux reactions aiming at high efficiency and sustainability in synthetic processes
• Grantee: Carlos Roque Duarte Correia
• Support type: Research Projects - Thematic Grants
• FAPESP's process: 16/09579-0 - Synthesis of Organic Selenides and Tellurides for Detection and Interception of Endogenous Oxidants
• Grantee: Alcindo Aparecido dos Santos
• Support type: Regular Research Grants