Photochemistry of Dendritic Polymer Structure and Dynamics

9412292汉森树枝状聚合物(树枝状大分子)是一类具有高度支化结构的新型聚合物。这项研究涉及到树枝状大分子的合成和表征，这些树枝状大分子的结构中含有共价的光谱探针。光谱研究将深入了解探头在树枝状分子内关键位置的微环境的极性、聚合物在溶液中的运动、离分子核不同距离的支链的流动性、小分子到树枝状大分子内部的通道以及树枝状分子的有效半径。这些实验将检验现有的树枝状大分子结构理论，并将允许建立更准确的模型来预测结构和动力学。这样的理解应该会增强树枝状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.