Coupled Cooperative Supramolecular Polymerization: A New Model Applied to the Competing Aggregation Pathways of an Amphiphilic aza-BODIPY Dye into Spherical and Rod-Like Aggregates
Coupled Cooperative Supramolecular Polymerization: A New Model Applied to the Competing Aggregation Pathways of an Amphiphilic aza-BODIPY Dye into Spherical and Rod-Like Aggregates
复制标题
耦合协同超分子聚合：应用于两亲性氮杂-BODIPY 染料竞争聚集途径形成球形和棒状聚集体的新模型
DOI：
10.1002/chem.201803336
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Chen Zhijian
中科院分区：
文献类型：
--
作者：
Liu Yong;Zhang Yongjie;Fennel Franziska;Wagner Wolfgang;Wuerthner Frank;Chen Yuanfang;Chen Zhijian
基于我们对两亲性BF2-氮杂二吡咯亚甲基（aza-BODIPY）染料的双相自组装行为的研究，提出了一种新的分析模型来定量描述涉及两个竞争性超分子聚合过程的聚集体的热力学性质。在该模型中，亚稳态和热力学稳定聚集体的形成被认为遵循成核聚合机制。基于新模型的数值计算可以深入了解这种复杂的聚集体系统中不同物种的形成。此外，通过浓度依赖性紫外/可见光谱研究了染料 1 的双相自组装过程的聚集。使用新模型对实验数据进行分析，以评估热力学参数，包括聚集常数、核尺寸以及两种类型聚集体的协同性。
Based on our studies on biphasic self‐assembly behavior of an amphiphilic BF2‐azadipyrromethene (aza‐BODIPY) dye1, a new analytical model to quantitatively describe the thermodynamic properties of the aggregation involving two competing supramolecular polymerization processes is proposed. In this model, the formation of the metastable as well as the thermodynamically stable aggregates was considered to follow a nucleated polymerization mechanism. The numerical calculation based on the new model gives insight into the formation of different species in such complicate aggregate systems. Moreover, the aggregation of the biphasic self‐assembly processes for dye1was investigated by concentration‐dependent UV/Vis spectroscopy. The experimental data were analyzed by using the new model to evaluate the thermodynamic parameters including aggregation constants, the size of nuclei, and the cooperativity the two types of aggregates.