Metallotropic liquid crystals formed by surfactant templating of molten metal halides
| Autor: | Todd A. Thornton, Jacob C. W. Folmer, Jeremey W. Knutson, James D. Martin, Mark P. Novotnak, Cristin L. Keary |
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| Rok vydání: | 2006 |
| Předmět: |
Models
Molecular Materials science Surface Properties Inorganic chemistry Halide Crystallography X-Ray Diffusion Metal Surface-Active Agents X-Ray Diffraction Liquid crystal Phase (matter) Materials Testing Nanotechnology Molecule General Materials Science Lamellar structure Microscopy Mechanical Engineering Temperature General Chemistry Condensed Matter Physics Block (periodic table) Liquid Crystals Nanostructures Models Chemical Chemical engineering Metals Mechanics of Materials visual_art Volume fraction visual_art.visual_art_medium Anisotropy Crystallization Porosity |
| Zdroj: | Nature Materials. 5:271-275 |
| ISSN: | 1476-4660 1476-1122 |
| DOI: | 10.1038/nmat1610 |
| Popis: | Liquid crystals consist of anisotropic molecular units, and most are organic molecules. Materials incorporating metals into anisotropic molecules, described as metallomesogens, have been prepared1. Anisotropic structures such as one-dimensional chains and two-dimensional layers are frequently observed in solid-state inorganic materials, however, little is understood about structural organization in melts of such materials. Achieving liquid-crystalline behaviour in inorganic fluids should be possible if the anisotropic structure can be retained or designed into the molten phase. We demonstrated the ability to engineer zeolite-type structures into metal halide glasses and liquids2,3. In this work we have engineered lamellar, cubic and hexagonal liquid-crystalline structure in metal-halide melts by controlling the volume fraction and nature of the inorganic block (up to 80 mol%) with respect to alkylammonium surfactants. The high metal content of these liquid-crystalline systems significantly advances the field of metallomesogens, which seeks to combine magnetic, electronic, optical, redox and catalytic properties common to inorganic materials with the fluid properties of liquid crystals. |
| Databáze: | OpenAIRE |
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