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Assembly of Mesoporous Molecular Sieves Containing Wormhole Motifs by a Nonionic Surfactant Pathway: Control of Pore Size by Synthesis Temperature
Author(s) -
Prouzet Eric,
Pinnavaia Thomas J.
Publication year - 1997
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199705161
Subject(s) - mesoporous material , molecular sieve , pulmonary surfactant , nonionic surfactant , chemical engineering , materials science , nanotechnology , atmospheric temperature range , chemistry , organic chemistry , adsorption , physics , meteorology , engineering , catalysis
Nonionic polyethylene oxide surfactants are versatile structure‐directing agents for the assembly of mesoporous molecular sieves, but their greatest benefit may lie in their ability to control the pore size of the mesostructure by the assembly temperature (see dependence of pore diameter R on temperature shown on the right). For mesostructured silicas with wormhole motifs, the average pore diameter can be altered by as much as 2.4 nm by varying the assembly temperature over a relatively narrow range below the cloud point temperature of the surfactant.