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Relevant academic research and scientific papers

Stannous chloride as a low toxicity and extremely cheap catalyst for regio-/site-selective acylation with unusually broad substrate scope

This work reports stannous chloride (SnCl2)-catalyzed regio-/site-selective acylation with unusually broad substrate scope. In addition to 1,2- and 1,3-diols and glycosides containing cis-vicinal diol, the substrate scope also includes glycosides without cis-vicinal diol. For such a substrate scope, usually, only methods using stoichiometric amounts of organotin reagents can lead to the same protection pattern with high selectivities and highly isolated yields (84-97% in most cases). Therefore, SnCl2, as a low toxicity and extremely cheap reagent, should be the best catalyst for regio-/site-selective acylation compared with any previously reported reagents. This journal is

Phase-selective gelators based on closed-chain glucose derivatives: their applications in the removal of dissolved aniline/nitrobenzene, and toxic dyes from contaminated water

Several effective PSGs have been developed from a series of glucose-based compounds for the removal of aniline and nitrobenzene from their biphasic mixtures with water via a simple shaking strategy at room temperature within 1 min. The morphologies of the gels formed in aniline and nitrobenzene in the absence or presence of a large amount of water have been examined by field emission scanning electron microscopy (FE-SEM). The dominant factors that drive gelation in the case of the gelator and aniline or nitrobenzene have been studied using FT-IR, concentration-dependent 1H NMR, and XRD. Additionally, the efficient purification of toxic dye solutions has been realized by using one of these gelators as the adsorbent in a gel column. And the corresponding xerogel can also be used for efficient dye removal. HPLC and UV/vis spectroscopy provide the quantification means for the estimation of the purification efficacy. The easy-to-implement performance and high removal efficiency of the organic pollutants from water indicate the potential and promising applicability of these organogelators in water purification.