Excited-state dynamics of dipyrrolyldiketone difluoroboron complexes
Excited-state dynamics of dipyrrolyldiketone difluoroboron complexes
复制标题
二吡咯二酮二氟硼配合物的激发态动力学
DOI：
10.1039/d1cp04804j
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发表时间：
2022
影响因子：
3.3
通讯作者：
Hiromitsu Maeda and Yoichi Kobayashi
中科院分区：
文献类型：
--
作者：
Ryota Sato;Hajime Okajima;Shinya Sugiura;Yohei Haketa;Yusuke Kinoshita;Hitoshi Tamiaki;Akira Sakamoto;Hiromitsu Maeda and Yoichi Kobayashi
阴离子响应型光功能材料已经得到了广泛的研究，因为阴离子对生物活性非常重要，并且构成了优雅的超分子结构的基石。已经报道了一些可以探测其环境中的阴离子的荧光阴离子受体，但其中许多分子的激发态仍然难以捉摸。激发态动力学的研究为优化发光性质、减少阴离子的光降解和光释放以及探索新的光功能提供了丰富的信息。在本研究中，我们通过时间分辨的可见光和红外吸收光谱，结合量子化学计算，研究了π共轭阴离子受体--芳基取代的二吡咯二酮二氟硼配合物的激发态动力学。阴离子结合改变了阴离子受体的辐射和非辐射速率常数以及激发态吸收。相反，S0和S1态的分子结构和结合能力是相似的。
Anion-responsive photofunctional materials have been extensively studied because anions are important for biotic activity and constitute the building blocks of elegant supramolecular architectures. A number of fluorescent anion receptors that can probe anions in their environments have been reported, but the excited states of many of these molecules remain elusive. Studies on excited-state dynamics provide fruitful information for optimizing the emission properties, minimizing the photodegradation and photorelease of anions, and exploring novel photofunctions. In this study, we investigated the excited-state dynamics of an aryl-substituted dipyrrolyldiketone difluoroboron complex, a π-conjugated anion receptor, by time-resolved visible and infrared absorption spectroscopy and emission decay measurements combined with quantum chemical calculations. Anion binding was found to alter the radiative and nonradiative rate constants and the excited-state absorption of the anion receptor. In contrast, the molecular structures and binding abilities were similar in the S0 and S1 states.