Switching Photon Upconversion by Using Photofluorochromic Annihilator with Low-Lying Triplet
Switching Photon Upconversion by Using Photofluorochromic Annihilator with Low-Lying Triplet
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使用低位三重态光致变色湮灭器切换光子上转换
DOI：
10.1021/acs.jpclett.1c00535
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Duan Pengfei
中科院分区：
文献类型：
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作者：
Han Jianlei;Zhang Jian;Shi Yonghong;Duan Pengfei
基于三重态-三重态湮没的光子上转换（TTA-UC）因其上转换量子产率高、阈值低、敏化剂和湮没剂灵活组合等显着特点而受到广泛关注。赋予 TTA-UC 响应能力将提供额外的应用维度；然而，开发在激发三重态下具有响应特征的湮灭子是一个挑战。在这里，我们展示了源自荧光二芳基乙烯的光致荧光变色消灭剂的合成和光物理行为。合成了一系列基于1,2-双(2-乙基-1-苯并噻吩-1,1-二氧化-3-基)全氟环戊烯的开启模式荧光二芳基乙烯，并对其光致变色和光致荧光变色行为进行了深入研究。当用近红外钌酞菁敏化时，可以在 730 nm 激发下观察到 TTA-UC，并伴有 500 至 700 nm 范围的上转换发射。由于湮灭器的光响应特性，TTA-UC可以通过紫外光和可见光的交替照射在“开”和“关”之间切换。
Photon upconversion based on triplet–triplet annihilation (TTA-UC) has attracted great attention due to its remarkable features including the high upconversion quantum yield, low threshold, and flexible combination of sensitizer and annihilator. Endowing TTA-UC with responsiveness will offer additional application dimensions; however, it is a challenge to develop annihilators with responsive features in the excited triplet state. Here we demonstrate the synthesis and photophysical behaviors of photofluorochromic annihilators derived from fluorescent diarylethenes. A series of turn-on mode fluorescent diarylethenes based on 1,2-bis(2-ethyl-1-benzothiophen-1,1-dioxide-3-yl)perfuorocyclopentene were synthesized, and their photochromism and photofluorochromism behaviors were thoroughly investigated. When sensitized by near-infrared ruthenium phthalocyanine, TTA-UC could be observed under excitation of 730 nm, accompanied by upconverted emission ranging from 500 to 700 nm. Because of the photoresponsive properties of the annihilators, TTA-UC can be switched between “on” and “off” by alternating irradiation of ultraviolet and visible light.