Hydrothermal syntheses of ETS-10 like vanadosilicates using chiral organic molecules. Part I

Autor(es)

Paula, Alex S. ^[1] ; de Vasconcellos, Adriano ^[1] ; Ellena, Javier A. ^[2] ; Giotto, Marcus ^[3] ; Nery, Jose G. ^[1]

Afiliação do(s) autor(es)

^[1] UNESP Univ Estadual Paulista, Dept Fis, Inst Biociencias, BR-15054000 Sao Paulo - Brazil

^[2] Univ Sao Paulo USP, Inst Fis Sao Carlos, BR-13560970 Sao Paulo - Brazil

^[3] Univ Connecticut, Inst Mat Sci, Storrs, CT 06269 - USA

• Tipo de documento: Artigo Científico
• Fonte: Microporous and Mesoporous Materials; v. 147, n. 1, p. 30-46, JAN 2012.
• Citações Web of Science: 1

Resumo

Vanadosilicates with the structures of ETS-10 and AM-6 microporous materials have been hydrothermally synthesized using organic directing structures agent (SDAs) derivatives of decahydroquinoline, 3,5-dimethyl-piperidine, 2,6-dimethyl-piperidine and (S)-Sparteine. Derivatives of these chiral amines have not been explored before in the sot gel chemistry of vanadosilicates. Physicochemical characterization of the obtained vanadosilicate materials with these different chiral templates was carried out by Xray diffraction (XRD), scanning electron microscopy (SEM). Raman and infrared (IR) spectroscopy, solid-state NMR spectroscopy, and differential thermogravimetric analysis (DTA)/thermogravimetric analysis (TGA). The results suggest that the presence of the chiral organic templates have different effects in terms of the final phase of the synthesized materials and their morphology. The products obtained using chiral template derivatives of decahydroquinoline reveal that certain products might be very enriched with chiral polymorph A while others present structures which are similar to other large-porous vanadosilicate such as AM-6 and AM-13. Derivatives of 2,6-dimethyl-piperidine and 3,5-dimethyl-piperidine have not favored any structure that resembles a chiral polymorph A. but only known vanadosilicates such as AM-6, AM-13. Derivatives of (S)-Sparteine, on the other hand, have not only favored the formation of structures enriched with a large amount of chiral polymorph A, but also their use has resulted in other unknown vanadosilicate structures whose physicochemical characterizations are in progress. (C) 2011 Elsevier Inc. All rights reserved. (AU)

• Processo FAPESP: 08/56973-9 - Síntese de novos templates orgânicos derivados de (S)-esparteina e seu estudo como agente direcionadores de novos estruturas zeolíticas
• Beneficiário: Adriano de Vasconcellos
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 05/54703-6 - Síntese de catalisadores sólidos enantioseletivos: o desafio intelectual, tecnológico e sintético de zeólitas quirais
• Beneficiário: Jose Geraldo Nery
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores