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ITQ‐7: A New Pure Silica Polymorph with a Three‐Dimensional System of Large Pore Channels
Author(s) -
Villaescusa Luis A.,
Barrett Philip A.,
Camblor Miguel A.
Publication year - 1999
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/(sici)1521-3773(19990712)38:13/14<1997::aid-anie1997>3.0.co;2-u
Subject(s) - crystallization , fluoride , zeolite , phase (matter) , ion , materials science , chemical engineering , topology (electrical circuits) , chemistry , inorganic chemistry , organic chemistry , catalysis , engineering , mathematics , combinatorics
A novel topology , consisting of a three‐dimensional system of large pore channels, is found for the zeolite ITQ‐7 (see picture). This material has been synthesized by combining the structure‐directing effects of fluoride ions and a new organic cation purposefully designed to promote the crystallization of a low‐density silica phase. ITQ‐7 is the least dense crystalline silica phase known so far.