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Structure‐Directing Roles of Organic Molecules in the Formation of Aluminosilicate and Aluminophosphate Molecular Sieves Revealed by 2D 1 H DQ‐SQ NMR Spectroscopy
Author(s) -
Liu Fangyan,
Wang Biao,
Liu Xiaolong
Publication year - 2021
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202003892
Subject(s) - molecular sieve , crystallization , aluminosilicate , molecule , autoclave , hydrothermal circulation , hydrothermal synthesis , materials science , chemical engineering , nuclear magnetic resonance spectroscopy , chemistry , chemical physics , crystallography , stereochemistry , organic chemistry , catalysis , engineering
Understanding of crystallization mechanisms of molecular sieves is driven by the broad range of usefulness and unique properties they possess. It is still difficult to obtain information related to the crystallization mechanism of molecular sieves, partly because the materials are generally prepared under hydrothermal conditions and the whole reaction happens in the “black box” autoclave. In this work, 2D 1 H DQ‐SQ NMR results clearly demonstrate that it is not only the electrostatic interactions between organic structure‐directing agents (OSDAs) and the framework, but also the correlation among OSDAs playing the dominant structural directing roles during the crystallization process. Our fundamental understanding of the crystallization mechanism of molecular sieves could be of great value to design and synthesize new molecular sieves with desirable structural properties.