Near-IR Absorbing J-Aggregate of an Amphiphilic BF2-Azadipyrromethene Dye by Kinetic Cooperative Self-Assembly
Near-IR Absorbing J-Aggregate of an Amphiphilic BF2-Azadipyrromethene Dye by Kinetic Cooperative Self-Assembly
复制标题
通过动力学协同自组装制备两亲性 BF2-氮杂二吡咯亚甲基染料的近红外吸收 J-聚集体
DOI：
10.1002/anie.201701788
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发表时间：
2017-05-15
影响因子：
16.6
通讯作者：
Wuerthner, Frank
中科院分区：
文献类型：
--
作者：
Chen, Zhijian;Liu, Yong;Wuerthner, Frank
利用Cu-I催化的“点击”反应合成了一种新的两亲性BF 2-氮杂二吡咯亚甲基（aza-BODIPY）染料1。对于这种染料，已经发现了两种自组装途径，导致不同类型的J-聚集体具有不同的近红外光学性质。亚稳态的非途径产物显示出宽的、无结构的吸收带，而化学稳定的途径上聚集体显示出J聚集体的特征光谱特征，即具有显著窄线宽的红移强吸收带。用原子力显微镜、透射电镜和扫描电镜研究了聚集体的形貌和结构。1的聚集过程进行了研究，通过温度和浓度依赖的UV/维斯光谱和评估的合作自组装模型。
A new amphiphilic BF2-azadipyrromethene (aza-BODIPY) dye 1 has been synthesized using a Cu-I-catalyzed "click" reaction. For this dye, two self-assembly pathways that lead to different type of J-aggregates with distinct near-infrared optical properties have been discovered. The metastable off-pathway product displays a broad, structureless absorption band while the thermodynamically stable on-pathway aggregate exhibits the characteristic spectral features of a J-aggregate, that is, red-shifted intense absorption band with significantly narrowed linewidth. The morphology and structure of the aggregates were studied by atomic force microscopy, transmission and scanning electron microscopy. The aggregation processes of 1 were investigated by temperature-and concentration-dependent UV/Vis spectroscopy and evaluated by models for cooperative self-assembly.