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酞菁薄膜的分子取向和可见颜色随温度的变化

Temperature-dependent changes in the molecular orientation and visible color of phthalocyanine films.

作者信息

Furuyama Taniyuki, Uchiyama Shiori, Chikamatsu Tatsuki, Horikawa Takafumi, Maeda Hajime, Segi Masahito, Takahashi Hiromi, Taima Tetsuya

机构信息

Graduate School of Natural Science and Technology, Kanazawa University Kakuma-machi Kanazawa 920-1192 Japan

Japan Science and Technology Agency (JST)-PRESTO 4-1-8 Honcho Kawaguchi Saitama 332-0012 Japan.

出版信息

RSC Adv. 2020 Aug 24;10(52):31348-31354. doi: 10.1039/d0ra06273a. eCollection 2020 Aug 21.

DOI:10.1039/d0ra06273a
PMID:35520682
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9056400/
Abstract

A simple phthalocyanine zinc complex exhibits a visible color change in response to weak external stimuli, , changes in solvent and temperature. Its chromism was attributed to its controlled aggregation weak interactions between the central metal and peripheral oxygen atoms. In solution, intense absorption and fluorescence bands appeared in both the longer-wavelength and NIR region in non-coordinating solvents, while a simple sharp Q band was observed in coordinating solvents. Variable-temperature absorption spectra and fluorescence lifetime measurements were used to characterize the aggregation-induced absorption and emission in non-coordinating solvents. A selective aggregation-disaggregation process was also observed in thin films of this phthalocyanine zinc complex, and the optical properties of the film depend on the annealing temperature. The changes in the NIR region lead to a sizable visible color change that is recognizable by the naked human eye. The temperature-dependent control of the aggregation process in the thin film was confirmed using operando spectroscopy techniques.

摘要

一种简单的酞菁锌配合物在受到微弱的外部刺激（如溶剂和温度的变化）时会呈现出可见的颜色变化。其变色现象归因于其可控的聚集以及中心金属与外围氧原子之间的弱相互作用。在溶液中，在非配位溶剂的较长波长和近红外区域均出现了强烈的吸收带和荧光带，而在配位溶剂中则观察到一个简单尖锐的Q带。变温吸收光谱和荧光寿命测量被用于表征非配位溶剂中聚集诱导的吸收和发射。在这种酞菁锌配合物的薄膜中也观察到了选择性的聚集-解聚过程，并且薄膜的光学性质取决于退火温度。近红外区域的变化导致了肉眼可识别的明显可见颜色变化。使用原位光谱技术证实了薄膜中聚集过程的温度依赖性控制。

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Perfluorophenyl-Directed Giant Porphyrin J-Aggregates.全氟苯基导向的巨型卟啉J-聚集体
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Fluorescent J-aggregates of cyanine dyes: basic research and applications review.菁染料的荧光 J-聚集体：基础研究与应用综述。
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