期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 610, 期 -, 页码 1027-1034出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2021.11.151
关键词
Metal organic frameworks; Directed assembly; E-field alignment; Liquid crystals; Colloidal assembly
资金
- University of Vienna
- ERC Consolidator Grant [101002176]
- European Research Council (ERC) [101002176] Funding Source: European Research Council (ERC)
This study successfully achieved the orientation and assembly of metal-organic framework (MOF) crystals through the strategy of E-field assisted liquid crystal assembly, overcoming the limitations of traditional methods and providing a new approach for the development of highly oriented MOF composites with improved functionality.
Most MOFs are non-cubic, with functionality dependent upon crystallographic direction, and are largely prepared as microcrystalline powders. Therefore, general methods to orient and assemble free-standing MOF crystals are especially important and urgently needed. This is addressed here through the novel strategy of E-field assisted liquid crystal assembly, applied to MIL-53-NH2(Al), MIL-68(In) and NU1000 MOF crystals, with aspect ratios ranging from 10 to 1.2, to form highly oriented MOF superstructures which were photopolymerized to fix their long-ranged order. This new strategy for controlling MOF orientation and packing side-steps the traditional requirements of particle monodispersity, shape homogeneity and high aspect ratios (>4.7) typical of colloidal and liquid crystal assembly, and is applicable even to polydispersed MOF crystals, thereby paving the way towards the development of highly oriented MOF composites with improved functionality. (c) 2021 The Authors. Published by Elsevier Inc. This is an open access article under the CC BY license (http:// creativecommons.org/licenses/by/4.0/).
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