Department of Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551, Japan.
Anal Bioanal Chem. 2010 Nov;398(5):2203-9. doi: 10.1007/s00216-010-4113-x. Epub 2010 Aug 26.
Analytical results of a series of poly(N-isopropylacrylamide) (PNiPA) with different tacticities using infrared spectroscopy are presented for studying the influence of the solvation and molecular interactions between the polymeric chains. Infrared spectra of solid matter samples of the compounds exhibit a systematic band intensity change for three band components at 1,680, 1,659, and 1,628 cm(-1) involved in the amide I band. The three components correspond to the free, half, and full hydrogen bondings of the secondary amide group, which reflect the molecular configuration depending on the tacticity. When cast films of the compounds prepared on a solid surface are analyzed by infrared transmission spectrometry, another factor of the solvent used for the film preparation is found to be another factor which plays an important role in determining the molecular architecture in the films. This molecular imprint mechanism after the solvation is confirmed by measuring infrared multiple-angle incidence resolution spectra of annealed films. The molecular interactions in the polymeric samples have been revealed by the use of infrared spectroscopy and the tacticity-controlled samples.
本文采用红外光谱法对一系列具有不同立构规整性的聚(N-异丙基丙烯酰胺)(PNiPA)进行了分析，研究了溶剂化和分子间相互作用对聚合物链的影响。化合物的固态物质样品的红外光谱在酰胺 I 带涉及的 1680、1659 和 1628 cm(-1)三个波段成分上表现出系统的谱带强度变化。这三个分量对应于二级酰胺基团的游离、半和全氢键，反映了取决于立构规整性的分子构型。当在固体表面上制备的化合物的薄膜通过红外透射光谱进行分析时，发现用于薄膜制备的溶剂的另一个因素是在薄膜中确定分子结构的另一个重要因素。这种溶剂化后的分子印迹机制通过测量退火膜的红外多角度入射分辨率谱得到了证实。红外光谱和立构控制样品揭示了聚合物样品中的分子相互作用。
