Photochemistry of Dendritic Polymer Structure and Dynamics

树突状聚合物（Dendritic polymer，简称dendrimers）是一类具有高度支化结构的新型聚合物。本研究涉及的树状大分子的合成和表征与光谱探针共价内置于结构。光谱研究将提供深入了解探针微环境在树突内战略位置的极性，聚合物在溶液中的运动，分支在离分子核心不同距离上的迁移率，小分子进入树突内部的途径，以及树突分子的有效半径。这些实验将测试现有的树突结构理论，并将允许制定更准确的模型来预测结构和动力学。这样的认识将提高枝晶聚合物的实际应用前景。

9412292 Hanson Dendritic polymers (dendrimers) are a remarkable new class of polymers with highly branched structure. This research deals with the synthesis and characterization of dendrimers with spectroscopic probes covalently built in to the structure. The spectroscopic studies will provide insight into the polarity of the probe's microenvironment at strategic locations within the dendramers, the motion of the polymers in solution, the mobility of branches at various distances from the molecular core, the acces of small molecules to the dendrimers' interior, and the effective radius of the dendritic molecules. The experiments will test the existing theories of dendrimer structure and will allow formulation of more accurate models for predicting both structure and dynamics. Such an understanding should enhance the prospects for pratical applications of dendritic polymers.