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Nanoporous Membranes of Hydrogen‐bridged Smectic Networks with Nanometer Transverse Pore Dimensions
Author(s) -
Gonzalez Carmen Luengo,
Bastiaansen Cees W. M.,
Lub Johan,
Loos Joachim,
Lu Kanbo,
Wondergem Harry J.,
Broer Dirk J.
Publication year - 2008
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200702002
Subject(s) - nanoporous , membrane , materials science , covalent bond , nanometre , hydrogen , liquid crystal , photopolymer , hydrogen bond , nanotechnology , chemical engineering , crystallography , molecule , organic chemistry , polymerization , polymer , chemistry , optoelectronics , composite material , biochemistry , engineering
Nanoporous membranes are made based on photoreactive hydrogen‐bridged smectic liquid crystal dimers. The self‐assembled layered structure is locked by photopolymerization. The hydrogen bridges are reversibly opened by heating or by changing the pH. This forms periodic pores of which the integrity is conserved by a covalent crosslinker, setting the spacing at ca. 1 nm. The pores are covered with carboxylic anions that bind to cations or to amines.