Modification of molecular sieves MCM-41 and SBA-15 with covalently grafted pyromellitimide and 1,4,5,8-naphthalenediimide

Author(s)

Trindade, Fabiane Jesus ^[1] ; Rey, Jose Fernando Queiruga ^[1] ; Brochsztain, Sergio ^[1]

Affiliation

^[1] Univ Fed ABC, Petr Nanotechnol Grp, BR-09210170 Santo Andre, SP - Brazil

• Document type: Journal article
• Source: Journal of Colloid and Interface Science; v. 368, p. 34-40, FEB 15 2012.
• Web of Science Citations: 10

Abstract

This article describes the covalent grafting of pyromellitimide and 1,4,5,8-naphthalenediimide, which are organic semiconductors with very interesting electro-optical properties, onto the walls of mesoporous molecular sieves. The mesoporous materials MCM-41 and SBA-15 were first treated with 3-aminopropyl-triethoxysilane, generating materials with a surface coverage of primary amino groups. These materials were further reacted with either pyromellitic dianhydride or 1,4,5,8-naphthalenetetracarboxylic dianhydride, generating surface-bound pyromellitimide or 1,4,5,8-naphthalenediimide, respectively. The success of the modification reactions was confirmed by elemental and thermogravimetric analyses, X-ray diffraction patterns and infrared, reflectance and fluorescence spectroscopies. The results indicated that the mesoporous structure of the new materials was preserved after the modification reactions and that the chromophores were included inside the mesoporous channels with stacked aromatic rings. (C) 2011 Elsevier Inc. All rights reserved. (AU)

• FAPESP's process: 08/57940-7 - Biofuel production by photochemical cracking of vegetable oils employing aromatic imides supported on mesoporous silicates as sensitizers
• Grantee: Sergio Brochsztain
• Support Opportunities: Program for Research on Bioenergy (BIOEN) - Regular Program Grants