Near-room-temperature phase-change fluorescent molecular rotor and its hybrids
| Autor: | Hyo-Sang Park, Young-Jae Jin, Young-Ghil Choi, Giseop Kwak |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Exothermic reaction
chemistry.chemical_classification Materials science Enthalpy of fusion Analytical chemistry 02 engineering and technology Tetraphenylethylene 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Endothermic process Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials chemistry.chemical_compound Differential scanning calorimetry chemistry Octadecane Materials Chemistry Physical and Theoretical Chemistry 0210 nano-technology Rubrene Spectroscopy Alkyl |
| Zdroj: | Journal of Molecular Liquids. 265:260-268 |
| ISSN: | 0167-7322 |
| DOI: | 10.1016/j.molliq.2018.05.128 |
| Popis: | A unique molecular rotor consisting of a tetraphenylethylene derivative with a paraffin wax-like long alkyl chain (TPE18) is synthesized and compared to other derivatives containing shorter alkyl chains. In differential scanning calorimetry, TPE18 shows an endothermic peak (enthalpy of fusion, ΔHfus = 55.3 J g−1) at 45 °C during the heating process and an exothermic peak at 38.6 °C during the cooling process. TPE18 exhibits critical changes in the fluorescence intensity and color during the crystal–melt phase change. TPE18 can be dissolved by an octadecane melt and then absorbed by filter paper. When the waxed paper is exposed to the heat sources of an IR laser or a finger, high-resolution fluorescence images of the characters and fingerprints appear on the paper. TPE18 also serves as a host matrix in a melt state that was easily mixed with the guest fluorophores of Alq3 and rubrene. Homogeneous hybrid solids with defined features are obtained without any significant segregation after cooling to room temperature. Fluorescence images with various colors are drawn onto the surfaces of glass slides or papers using the hybrids as crayons. |
| Databáze: | OpenAIRE |
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