Spectral insights into microdynamics of thermoresponsive polymers from the perspective of two-dimensional correlation spectroscopy

作者: Sheng-tong Sun , Pei-yi Wu

DOI: 10.1007/S10118-017-1938-1

关键词: Lower critical solution temperaturePhase transitionChemical physicsThermoresponsive polymers in chromatographyRaman spectroscopyChemistryTwo-dimensional nuclear magnetic resonance spectroscopyAnalytical chemistryPolymerSpectral lineInfrared

摘要: Generalized two-dimensional correlation spectroscopy (2DCOS) and its derivate technique, perturbation moving window (PCMW), have found great potential in studying a series of physico-chemical phenomena stimuli-responsive polymeric systems. By spreading peaks along second dimension, 2DCOS can significantly enhance spectral resolution discern the sequence group dynamics applicable to various external perturbation-induced spectroscopic changes, especially infrared (IR), near-infrared (NIR) Raman spectroscopy. On basis synchronous power spectra changing, PCMW proves be powerful tool monitor complicated variations find transition points ranges. This article reviews recent work our research application thermoresponsive polymers, mainly focused on liquid crystalline polymers lower critical solution temperature (LCST)-type polymers. Details motions chain conformational changes upon thus elucidated at molecular level, which contribute understanding their phase nature.

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