Metal-Organic Framework superstructures with long-ranged orientational order via E-field assisted liquid crystal assembly
| Autor: | Alexander Prado-Roller, Adam J. Young, Fei Cheng, Michael R. Reithofer, Endre Kiss, Jia Min Chin, Kamal Allahyarli, Tristan Tsai Yuan Tan |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Colloidal assembly
Materials science Liquid crystals Metal organic frameworks Nanotechnology 02 engineering and technology E-field alignment 010402 general chemistry 021001 nanoscience & nanotechnology Directed assembly 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Biomaterials Colloid Colloid and Surface Chemistry Microcrystalline Liquid crystal Electric field Homogeneity (physics) Particle Metal-organic framework 0210 nano-technology |
| Popis: | 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 NU-1000 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. |
| Databáze: | OpenAIRE |
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