78377-06-7Relevant academic research and scientific papers
Nanomolar Detection of Palladium (II) through a Novel Seleno-Rhodamine-based fluorescent and colorimetric chemosensor
Back, Davi F.,Braga, Ataualpa A. C.,Dos Santos, Alcindo A.,Giroldo, Lilian,Lodeiro, Carlos,Pradie, Noriberto A.,Reis, Joel S.,Soares-Paulino, Ant?nio A.,Stefani, Hélio A.
, (2020/04/08)
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.
Solvent-induced dichotomy in the oxidation mechanism of alkyl aromatic selenoethers
Fechete, Ioana,Jouikov, Viatcheslav
, p. 634 - 640 (2014/07/21)
Changing solvent polarity (considered in terms of dielectric permittivity ? is an easy experimental way for tuning the reactivity of electrogenerated cation radicals of alkyl aromatic selenoethers. First-order cleavage of SeC3 bond is favored in polar media, whereas bimolecular cation radical disproportionation becomes the main reaction in low-polar solvents. The key element of this dichotomy is the dielectric adjustment of specific transannular interactions between Se and CO group in the cation radicals. A series of alkyl arylselenides with pending carboxy or acetamido substituents was studied by cyclic voltammetry, IR spectroscopy and DFT calculation in binary solvents covering the span of polarity 8 2Se 2.
Stereoelectronic effects in the reactivity of electrogenerated cation radicals of arylselenides
Jouikov,Fattakhova
, p. 220 - 230 (2007/10/03)
The role of stereoelectronic effects in the electrochemical oxidation of arylselenides Se-substituted by a trimethylsilylmethyl group and those with substituents bearing a carbonyl group have been considered. Although the HOMO of these compounds is formed of pz-type electrons of the ArSe moiety, the predominant contribution from the lone pair of Se makes the heteroatom more susceptible to direct electronic effects than to effects transmitted through the aromatic ring. The σ-p hyperconjugation and the interaction through space were shown to lower the charge localization on the reaction center and to stabilize cation radicals of these compounds, thus changing the control of the potential-determining reaction and promoting second order reactions.
Aryl Arylazo Sulfones Chemistry. 2. Reactivity toward Alkaline Alkane- and Areneselenolate and Alkane- and Arenetellurolate Anions
Evers, Michel J.,Christiaens, Leon E.,Renson, Marcel J.
, p. 5196 - 5198 (2007/10/02)
Tolyl arylazo sulfones react with various alkyl- and arylseleno reagents to produce substituted alkyl aryl and unsymmetrical diaryl selenides.The corresponding tellurides can also be obtained.Isolated yields in both cases are good.This procedure is an interesting alternative to the classical Sandmeyer reaction.
Syntheses of Mercaptobenzoic Acids and Mercaptopyridines Using Elemental Sulfur in the Presence of NaOH-KOH
Kamiyama, Tsutomu,Enomoto, Saburo,Inoue, Masami
, p. 5184 - 5189 (2007/10/02)
Mercaptobenzoic acids and mercaptopyridines were synthesized by using mercaptylation of halogeno compounds with elemental sulfur in the presence of molten salts (NaOH-KOH).This procedure was also applied to the preparation of selenoaryl compounds by using elemental selenium.Based on the behavior of the molten salts and sulfur, Na2S and K2S were considered to be the active species for the mercaptylation.KEYWORDS-mercaptylation; molten salt; o-mercaptobenzoic acid; o-selenobenzoic acid; 2-mercaptopyridine
SYNTHESE NOUVELLE ET RAPIDE D'AKYLSELENO ET ALKYLTELLUROARENES AU MOYEN D'ETHERS-COURONNES
Luxen, Andre,Christiaens, Leon
, p. 3905 - 3908 (2007/10/02)
A phase transfer catalytic synthesis of alkylseleno and alkyltelluroarenes is describe from arenediazonium tetrafluoroborates and dialkyldichalcogenides.
