Polarity Effect of Exterior Chains on Self-Assembled Structure and Aggregation Mechanism of Tetraphenylethene Derivatives in THF/Water Mixtures

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• 作者：Su-Bin Han ; Ho-Joong Kim ; Dasom Jung ; Jinhee Kim ; Byoung-Ki Cho ; Sung Cho
• 刊名：Journal of Physical Chemistry C
• 出版年：2015
• 出版时间：July 16, 2015
• 年：2015
• 卷：119
• 期：28
• 页码：16223-16229
• 全文大小：396K
• ISSN：1932-7455

文摘

We investigated self-assembled structures and aggregation mechanisms of tetraphenylethene (TPE) derivatives in a THF/water mixtures using time-resolved spectroscopic measurements and theoretical calculations. The TPE derivatives, with nonpolar aromatic core and nonpolar exterior dodecyl chains, form unidirectional ordered aggregates in the THF/water solvent mixture because of the effective ordered aggregation between nonpolar aromatic cores. The aggregation formation of the other TPE derivative with polar exterior di(ethylene oxide) chains is caused by an emulsion-driven amorphous aggregation without any obvious attractive intermolecular interaction. The different polarities of the exterior chains in the TPE derivatives and the emulsion formation in the THF/water mixture induce different aggregation mechanisms: unidirectional ordered versus emulsion-driven amorphous aggregates.