resumo
The amination reaction of biphenylene moieties in crystal-like mesoporous silica (Bph-PMO) is successfully achieved with a density of 3.17 mmol g(-1). The amination occurs approximately in every aromatic ring of the biphenylene bridge in the position 2 and 2', leading to above 50% of the biphenylene group di-aminated. The structural integrity of the synthetized material is preserved during the strong acid treatment to achieve the amine funcionalization of Bph-PMO. The aminated mesoporous organosilica is highly active (initial turnover frequency 2193 h(-1) or 37 min(-1)) and almost 100% selective in the Knoevenagel condensation. Moreover, the amine-modified periodic mesoporous biphenylene-silica is effective for direct metal coordination. (C) 2015 Elsevier Inc. All rights reserved.
palavras-chave
METAL-ORGANIC FRAMEWORK; CHANNEL WALLS; ORGANOSILICAS; CATALYST
categoria
Chemistry; Science & Technology - Other Topics; Materials Science
autores
Lourenco, MAO; Mayoral, A; Diaz, I; Silva, AR; Ferreira, P
nossos autores
Ana Rosa Silva
Investigador Principal
Mirtha A. O. Lourenço
Investigador
Paula Celeste da Silva Ferreira
Investigador Coordenadoragradecimentos
This work was developed in the scope of the project CICECO-Aveiro Institute of Materials (Ref. FCT UID/CTM/50011/2013), financed by National funds through the FCT/MEC and when applicable co-financed by FEDER under the PT2020 Partnership Agreement. Authors are grateful to the Fundacao para a Ciencia e a Tecnologia (FCT), Fundo Europeu de Desenvolvimento Regional (FEDER), QREN-COMPETE and the European Union, for funding the project FCOMP-01-0124-FEDER-015644 (PTDC/QUI-QUI/113678/2009). ARS and PF acknowledge FCT for IF/01300/2012 and IF/00327/2013, respectively. MAOL thanks the PhD grant SFRH/BD/80883/2011. The research leading to these results has received funding from the European Union Seventh Framework Program under Grant Agreement 312483 - ESTEEM2 (Integrated Infrastructure Initiative-I3).