Confocal Luminescence Microscopy of Metal-Organic Framework Single Crystals
Date Issued
2009
Date
2009
Author(s)
Yu, Ya-Chien
Abstract
The metal-organic frameworks (MOFs) materials has in recent years advanced extensively, so the materials can afford many and various architectures, which are constructed from a variety of molecular building blocks with different interactions between them. Compounds with backbones constructed from metal ions as connectors and ligands as linkers. Metal–ligand compounds that extend “infinitely” into one, two or three dimensions (1D, 2D or 3D, respectively) via some covalent metal–ligand bondings. Because the porous materials have various properties and potential, contain there are many applications, such as separation, heterogeneous catalysis, and gas storage. The adsorption and desorption of guest molecules onto the solid surface also plays an essential role in determining the properties of porous compounds, for instance photophysics, conformation, and even stability. Our studying is based on the luminescence using confocal microscope owing to transforming the architectures. Some weaker non-covalent interactions, such as hydrogen bonding or π–π stacking are very important for the packing structures of the one- dimensional chains, two-dimensional nets and three-dimensional frameworks. X-ray powder diffraction (XRPD) and thermogravimetric (TG) measurements are commonly used to analyze the stability of structure. These compounds which we study have specific properties of photoluminescence, the enhancement of quantum efficiency after heating. Compound 1 may thus find their potential application in water sensor. Moreover, the water adsorption property may find their potential application in moisturizing. These results exemplify a unique model that the structural constraints acting on the orientation of water by its surrounding and vice versa can be very significant. Compound 3 has functionalized groups that may have potential on organic solvents and metal ions. We found out that cyclohexane or lead ions exist in the structure, the quantum efficiency of fluorescence will be enhanced.
Subjects
Metal-Organic Framework
Single crystal
Confocal
Sensor
Photoluminescence
Fluorescence
Type
thesis
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