Waste camellia seed shell was placed in fluidized bed tubular reactor and carbonized at 700°C for the preparation of a carbon material, and which was then used as the support for the synthesis of a novel solid Brönsted acid catalyst H3PW12O40/C by impregnation of it with H3PW12O40 solution. The obtained H3PW12O40/C catalyst was characterized by scanning electron microscope, X-ray diffraction, t...

via a One-pot Pseudo Three-component Reaction using H3PW12O40 · xH2O as a Catalyst Leili Jalili-Baleh, Mehdi Khoobi, Abbas Shafiee, and Alireza Foroumadi Department of Medicinal Chemistry, Faculty of Pharmacy and Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, Tehran 14176, I. R. Iran Reprint requests to Prof. Alireza Foroumadi. Fax: 0098-21-66461178. E-mail: afo...

A zirconium modified MCM-48 mesoporous material was synthesized by surfactant-templated method. Surface grafting Zr-MCM-48 with tungstophosphoric acid led to a great enhancement of both the number of the Brønsted acid sites and acidity strength in comparison with the bare support. At 100 ̊C, the 30 wt% H3PW12O40/Zr-MCM-48 contained 174 mol/g Brønsted acid sites which were 21.7 times greater tha...

Hofmeister effects of ions in aqueous solution strongly affect chemical and biological systems. High low charge density anions, such as SO42- SCN- respectively, decrease (salting-out) or increase (salting-in) the solubility organic solutes water. Due to their very charge-density, nanometric e.g. polyoxometalates (POMs), tremendously (highly salting-in) they bind neutral hydrated – a property th...

The synthesis of phenol by one-pot oxidation benzene with dioxygen (O2) is a significant conceptual and practical challenge because has low reactivity to O2 at room temperature ambient pressure. Furthermore, more reactive than easily overoxidized, so complete likely proceed in the reaction, which generally results lower yield selectivity. Herein, we report that heteropolyacid H3PW12O40 function...

we have used tungestophosphoric acid to catalyze oxidative amidation reaction from benzyl alcohols and methylarens with hydrochloride salts of amines. to achieve this purpose, modified magnetic nanoparticles (γ-fe2o3@sio2@h3pw12o40) were applied as catalyst and tbhp as external oxidant. after optimizing, different derivates of benzamides were synthesized in good yields. also, the result of two ...

a new efficient and practical method for the room-temperature reduction of aromatic nitro compounds employing feso4. 7h2o, nabh4, h3pw12o40 system in h2o under mild conditions is reported. the method is simple, inexpensive, easily scaled-up and applicable for the large scale preparation of different substituted anilines.