Salen-Chromium Complex Catalyzed Ring Opening of<i>meso</i>-Epoxides

Tiecco, Marcello; Testaferri, Lorenzo; Marini, Francesca; Sternativo, Silvia; Verme, Francesca Del; Santi, Claudio; Bagnoli, Luana; Temperini, Andrea

doi:10.1055/s-2008-1077847

Cited by 1 publication

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“…The cyclic ethers, which have much higher reactivity than their simple ethers counterparts, can be used as acid scavenger in the epoxide oxygen protonation and subsequent ring opening (Eq. 1) [31,32]…”

Section: Introductionmentioning

confidence: 99%

Low-temperature synthesis of mesoporous nanocrystalline magnesium aluminate (MgAl2O4) spinel with high surface area using a novel modified sol-gel method

Habibi

Wang

Arandiyan

et al. 2017

Advanced Powder Technology

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A simple, template-free and scalable modified sol-gel route was developed for the synthesis of mesoporous flake-like magnesium aluminate spinel (MgAl 2 O 4) at low temperature (700 °C) with high surface area (281 m 2 g-1). The obtained spinel materials were characterized by means of physicochemical techniques including X-ray diffraction, thermogravimetric analysis, scanning electron microscopy with energy-dispersive X-ray spectroscopy, transmission electron microscopy, Fourier transform infrared spectroscopy and N 2 adsorption-desorption analysis. The propylene oxide was used as gelation and pore forming agent in the sol-gel process. Different morphologies and sizes of flake were generated by the varied synthesis conditions. The result materials reveal that the textural properties of the MgAl 2 O 4 product are strongly associated with the nature and amount of addictive solvent and calcination temperatures. It shows that the BET surface area decrease as the increase of calcination temperature and the optimal temperature of 700 °C result in the pure phase of MgAl 2 O 4 spinel. This synthesis strategy offers a feasible

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Section: Introductionmentioning

confidence: 99%