EPR Spectroscopic Characterization of Local Nanoscopic Heterogeneities during the Thermal Collapse of Thermoresponsive Dendronized Polymers
作者:Matthias J. N. Junk、Wen Li、A. Dieter Schlüter、Gerhard Wegner、Hans W. Spiess、Afang Zhang、Dariush Hinderberger
DOI:10.1002/anie.201001469
日期:——
The collapse transition of thermoresponsive dendronized polymers was characterized on a molecular scale by CW EPR spectroscopy. Aggregation of the polymer is triggered by dynamic structural inhomogeneities of a few nanometers, and the dehydration of the polymer chains proceeds, despite the sharp phase transition, over a temperature interval of at least 30 °C (see picture).
通过CW EPR光谱在分子尺度上表征了热响应性树突化聚合物的塌陷转变。聚合物的聚集是由几纳米的动态结构不均匀性触发的,尽管发生了急剧的相变,但在至少30°C的温度间隔内,聚合物链仍会发生脱水。