Thermodynamic Fluorescence Behavior of a Fluorenone Derivative through Solvent- and Temperature-Controlled Hydrogen Bonding

IF 3 4区 化学 Q3 CHEMISTRY, PHYSICAL
Mr. Jineun Lee, Prof. Toshikazu Sakaguchi, Prof. Giseop Kwak
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引用次数: 0

Abstract

A fluorenone derivative with an extended conjugated structure emitting visible light was examined as a functional fluorescent dye that responds to solvent and heat stimuli in a precisely controlled manner. Intermolecular hydrogen bonds between the fluorenone dye and solvent, which cause fluorescence (FL) quenching due to vibronic coupling, were broken and regenerated by adjusting the hydrogen bond acidity and basicity of solvent mixtures in various combinations or by varying the temperature. The fluorenone dye exhibited a unique heat-induced FL emission enhancement during heating and returned to the quenched state during cooling. Thus, this FL change was highly reversible and repeatable. Moreover, through thermodynamic consideration based on the spectroscopic analysis, the Gibbs energy change was calculated for each solvent mixture composition to predict the thermodynamic preference for FL enhancement.

Abstract Image

氟芴酮衍生物通过溶剂和温度控制氢键的热力学荧光行为
研究了一种具有扩展共轭结构的荧光酮衍生物,该衍生物能以精确控制的方式对溶剂和热刺激作出反应。荧光酮染料和溶剂之间的分子间氢键由于振动偶联而导致荧光猝灭,通过调整不同组合的溶剂混合物的氢键酸碱度或改变温度,氢键断裂并再生。氟酮染料在加热过程中表现出独特的热致荧光发射增强,在冷却过程中恢复到淬火状态。因此,这种FL变化是高度可逆和可重复的。此外,在光谱分析的基础上,通过热力学考虑,计算了每种溶剂混合物组成的吉布斯能变化,以预测对FL增强的热力学偏好。
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来源期刊
ChemPhotoChem
ChemPhotoChem Chemistry-Physical and Theoretical Chemistry
CiteScore
5.80
自引率
5.40%
发文量
165
期刊介绍: Light plays a crucial role in natural processes and leads to exciting phenomena in molecules and materials. ChemPhotoChem welcomes exceptional international research in the entire scope of pure and applied photochemistry, photobiology, and photophysics. Our thorough editorial practices aid us in publishing authoritative research fast. We support the photochemistry community to be a leading light in science. We understand the huge pressures the scientific community is facing every day and we want to support you. Chemistry Europe is an association of 16 chemical societies from 15 European countries. Run by chemists, for chemists—we evaluate, publish, disseminate, and amplify the scientific excellence of chemistry researchers from around the globe.
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