Aggregation-induced chirality amplification of optically active fluorescent polyurethane and a cyclic dimer in the ground and excited states
Aggregation-induced chirality amplification of optically active fluorescent polyurethane and a cyclic dimer in the ground and excited states
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光学活性荧光聚氨酯和基态和激发态环状二聚体的聚集诱导手性放大
DOI：
10.1039/d1cc05633f
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发表时间：
2022
影响因子：
4.9
通讯作者：
Nakano Tamaki
中科院分区：
文献类型：
--
作者：
Song Zhiyi;Sato Hiroyasu;Pietropaolo Adriana;Wang Qingyu;Shimoda Shuhei;Dai Heshuang;Imai Yoshitane;Toda Hayato;Harada Takunori;Shichibu Yukatsu;Konishi Katsuaki;Bando Masayoshi;Naga Naofumi;Nakano Tamaki
以2,7-二异氰酸酯芴和2,2′-二羟基-1,1′-联萘基为原料合成了光活性线性聚氨酯和环二聚体。在较高的浓度下，聚合物的圆二色性（CD）光谱强度通过聚集体的形成被放大，而圆偏振光（CPL）发射没有增强。由于分子间准分子聚集形成，环二聚体的CPL辐射被大大放大（glum 1.1 × 10−2），而CD强度不受影响。
Optically active linear polyurethane and a cyclic dimer were synthesized from 2,7-diisocyanatofluorene and 2,2′-dihydroxy-1,1′-binaphthyl. The circular dichroism (CD) spectral intensity of the polymer was amplified at a higher concentration through aggregate formation, while circularly polarized light (CPL) emission was not enhanced. The cyclic dimer's CPL emission was largely amplified (glum 1.1 × 10−2) due to intermolecular excimer formation through aggregation, while the CD intensity was not affected.