Synthesis and characterisation of hybrid mesoporous materials with the 1,4-diazobutadiene ligand
authors Nunes, CD; Vaz, PD; Brandao, P; Rocha, J; Ferreira, P; Bion, N; Calhorda, MJ
nationality International
journal MICROPOROUS AND MESOPOROUS MATERIALS
author keywords MCM-41; DAB ligands; mesoporous materials; organic-inorganic hybrid materials; spectroscopy
keywords CONSISTENT PERTURBATION-THEORY; HETEROCYCLIC BRIDGING GROUPS; CHANNEL WALLS; ORGANIC GROUPS; BASIS-SETS; ORGANOSILICAS; SILICA; DENSITY; PMOS; PHENYLENE
abstract Novel mesoporous MCM-41 type hybrid materials were synthesised by co-condensation of a "flexible" ligand derived from 1,4-diazobutadiene (1) and tetraethyl orthosilicate in three different ratios (0.027, 0.05, and 0.20) and in the presence of cetyltrimethylammonium. bromide as templating agent. Surfactant extraction under mild conditions produced hybrid mesoporous materials with uniform mesoporous scale channels, large pore volumes, and high specific surface areas. These mesoporous organosilicas were characterised by powder X-ray diffraction, nitrogen gas adsorption, C-13 and Si-29 solid state NMR and thermogravimetric analysis. Results from DFT calculations were used for discussing NMR and IR experimental data. The organosilica materials with lower content of organic molecules present uniform 2D-hexagonal mesoporous arrays with pore diameter ranging from 2.0 to 4.0 nm and a surface area ranging from 693 to 803 m(2)/g. The introduction of a larger amount, such as 20%, of organic building block seems to decrease the order of the material and reduce the space available within the pore. (c) 2006 Elsevier Inc. All rights reserved.
publisher ELSEVIER SCIENCE BV
issn 1387-1811
year published 2006
volume 95
issue 1-3
beginning page 104
ending page 111
digital object identifier (doi) 10.1016/micromeso.2006.05.010
web of science category Chemistry, Applied; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
subject category Chemistry; Science & Technology - Other Topics; Materials Science
unique article identifier WOS:000241306300013
  ciceco authors
  impact metrics
journal analysis (jcr 2019):
journal impact factor 4.551
5 year journal impact factor 4.157
category normalized journal impact factor percentile 71.108
dimensions (citation analysis):
altmetrics (social interaction):



 


Sponsors

1suponsers_list_ciceco.jpg