10.1016/j.ica.2011.06.036
The study focuses on the synthesis and characterization of photofunctional Eu3+/Tb3+ hybrid materials, which are inorganic silica covalently linked to organic polymer chains through sulfide bridges. The main chemicals used include 2-thiosalicylic acid (TSA), crosslinking reagents 3-chloropropyltrimethoxysilane (CTPMS) and 3-(triethoxysilyl)-propyl isocyanate (TESPIC), tetraethoxysilane (TEOS), europium and terbium nitrates, and organic polymers polyacrylamide (PAM) and polyethylene glycol (PEG). These chemicals serve to create sulfide-bridged molecular linkages and polymeric silane derivatives, which are then assembled into multi-component hybrid materials through co-hydrolysis and co-polycondensation with TEOS. The purpose of these materials is to improve photoluminescence properties by integrating the benefits of both inorganic silica and organic polymers, such as enhanced thermal or optical stabilities, chemical stability, and mechanical strength. The study aims to develop hybrid systems with improved luminescence behavior for potential applications in luminescence and laser fields.
10.1039/b715507g
The research focuses on the anti-Markovnikov hydroamination and hydrothiolation of electron-deficient vinylarenes, catalyzed by well-defined monomeric copper(I) amido and thiolate complexes supported by the N-heterocyclic carbene ligand IPr. The study explores the atom-efficient synthetic method for the formation of C–S and C–N bonds through the addition of S–H/N–H bonds of thiols/amines across olefins. The experiments utilized various substituted styrenes with electron-withdrawing para-substituents, such as nitro and cyano groups, in the presence of amine or benzylamine, and a copper catalyst, (IPr)Cu(NHPh). The reactions were monitored using 1H NMR spectroscopy to determine yields, and the products were isolated and fully characterized. The study also investigated the mechanism of the reactions, suggesting a rate-determining nucleophilic addition of the amido or thiolate ligand to free vinylarene. The research demonstrated the potential utility of these Cu catalysts by synthesizing a precursor to a class III antiarrhythmic agent in a single step, which traditionally requires a multi-step process. The article highlights the significance of the electron-withdrawing ability of the vinylarene's para-substituent on the reactivity and the anti-Markovnikov selectivity observed in the reactions.
10.1021/om0102551
The research presents a study on the reduction reactions of uranium(IV) thiolates, Cp2U(SR)2 (where Cp is η-C5Me5 and R is Ph, Me, iPr, or tBu), using sodium amalgam to produce the corresponding uranium(III) complexes Na[Cp2U(SR)2] (R = Ph, Me, iPr) or the uranium(IV) sulfide Na[Cp2U(StBu)(S)]. The purpose of the study was to investigate the stability and reactivity of these complexes, particularly focusing on C-H and C-S bond cleavage. The research concluded that the stability and reactivity of the U(III) anions [Cp2U(SR)2]- and their oxidation following C-S or C-H bond cleavage were significantly influenced by the nature of the R group. The uranium(III) complexes Na[Cp2U(SPh)2] and [Na(18-crown-6)][Cp2U(SR)2] (R = Me, iPr) could be isolated, with the isopropyl thiolate derivative being the first crystallographically characterized thiolate of U(III). The study also found that low-valent, coordinatively unsaturated species could facilitate the C-S bond cleavage reaction, which is significant for catalytic desulfurization processes. Key chemicals used in the process included sodium amalgam, 18-crown-6, tetrahydrofuran (THF), and various organometallic compounds such as Cp2U(SR)2 and Na[Cp*2U(StBu)(S)].
Xi, 
Xn, 
N
