Kudo Kohi, Ide Tomohito, Kishida Natsuki, Yoshizawa Michito
Department of Chemical Science and Engineering, National Institute of Technology, Tokyo College, 1220-2 Kunugida-machi, Hachioji-shi, Tokyo, 193-0997, Japan.
Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan.
Angew Chem Int Ed Engl. 2021 May 3;60(19):10552-10556. doi: 10.1002/anie.202102043. Epub 2021 Apr 1.
A nanocapsule composed of multiple carbazole panels (ca. 12 panels) was quantitatively generated from bent carbazole-based amphiphiles in water. Unlike previously reported macrocycles and coordination cages bearing several carbazole panels, the resultant nanocapsule displays enhanced emissivity and improved electrochemical stability as compared with the monomeric amphiphile. The spectroscopic properties of substituted coumarin and boron-dipyrromethene dyes can be modulated upon encapsulation by the nanocapsule in water. In the cavity, a highly blue-shifted absorption band is observed from largely twisted coumarin dyes and two absorption bands are found from boron-dipyrromethene dimers stacked in an unusual L-shaped fashion. Moreover, the encapsulated dimers exhibit unique excimer-like emission.
由多个咔唑面板（约12个面板）组成的纳米胶囊在水中由弯曲的咔唑基两亲物定量生成。与先前报道的带有几个咔唑面板的大环和配位笼不同，所得纳米胶囊与单体两亲物相比显示出增强的发射率和改善的电化学稳定性。取代香豆素和硼二吡咯亚甲基染料的光谱性质在水中被纳米胶囊包封时可被调节。在腔内，从高度扭曲的香豆素染料观察到一个高度蓝移的吸收带，并且从不寻常的L形堆叠的硼二吡咯亚甲基二聚体中发现两个吸收带。此外，被包封的二聚体表现出独特的类激基缔合物发射。
