Picken, Stephen J.; Filonenko, Georgy A. published an article in 2021. The article was titled 《Environmentally Sensitive Luminescence Reveals Spatial Confinement, Dynamics, and Their Molecular Weight Dependence in a Polymer Glass》, and you may find the article in ACS Applied Polymer Materials.Name: 2,6-Pyridinedimethanol The information in the text is summarized as follows:
Polymer glasses have an irregular structure. Among the causes for such complexity are the chem. distinct chain end groups that are the most abundant irregularities in any linear polymer. In this work, we demonstrate that chain end induced defects allow polymer glasses to create confined environments capable of hosting small emissive mols. Using environmentally sensitive luminescent complexes, we show that the size of these confinements depends on mol. weight and can dramatically affect the photoluminescence of free or covalently bound emissive complexes. We confirm the impact of chain end confinement on the bulk glass transition in poly(Me acrylate) (pMA) and show that commonly observed Tg changes induced by the chain ends should have a structural origin. Finally, we demonstrate that the size and placement of luminescent mol. probes in pMA can dramatically affect the probe luminescence and its temperature dependence, suggesting that polymer glass is a highly irregular and complex environment, marking its difference with conventional small mol. solvents. Considering the ubiquity of luminescent glassy materials, our work lays down a blueprint for designing them with structural considerations in mind, ones where packing d. and chain end size are key factors. After reading the article, we found that the author used 2,6-Pyridinedimethanol(cas: 1195-59-1Name: 2,6-Pyridinedimethanol)
2,6-Pyridinedimethanol(cas: 1195-59-1) belongs to pyridine. Pyridine is a relatively complex molecule and exhibits a number of different bands in IR spectra. Among others, the bands characterizing the ν8a and ν19b modes have been found to be sensitive to the coordination or protonation of the molecule. Note that the band that is diagnostic for the PyH+ ion at about 1545 cm− 1 (ν19b mode) does not overlap with any of the other bands.Name: 2,6-Pyridinedimethanol
Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts