Fourier self-deconvolution analysis of hydrogen bonding states of polyvinylpyrrolidone in an amorphous sugar matrix below and above the glass transition temperature

Koreyoshi Imamura, Ken Ichi Ohyama, Kazuko Tani, Toru Yokoyama, Yoshinobu Maruyama, Hiroyuki Imanaka, Kazuhiro Nakanishi

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

In an amorphous mixture of sugar and polyvinylpyrrolidone (PVP), PVP carbonyl groups form hydrogen bonds with sugar hydroxyl groups, thereby improving the physical stability of the amorphous matrix against a glass-to-rubber transition. Herein, Fourier self-deconvolved IR bands due to the C=O stretching vibration of PVP in sugar-PVP mixtures were analyzed. The C=O groups in sugar-PVP mixtures generally had four vibrational states, corresponding with free and hydrogen-bonded C=O in three different modes. Changes in these vibrational states induced by increasing the temperature were compared among various sugar-PVP mixtures. Formation and thermal disruption characteristics of different modes of sugar-PVP hydrogen bondings are discussed.

Original languageEnglish
Pages (from-to)305-312
Number of pages8
JournalSpectroscopy Letters
Volume41
Issue number6
DOIs
Publication statusPublished - Sep 1 2008

Keywords

  • Amorphous sugar
  • Carbonyl stretching vibration
  • Fourier self-deconvolution
  • Glass transition temperature
  • Polyvinylpyrrolidone

ASJC Scopus subject areas

  • Analytical Chemistry
  • Atomic and Molecular Physics, and Optics
  • Spectroscopy

Fingerprint Dive into the research topics of 'Fourier self-deconvolution analysis of hydrogen bonding states of polyvinylpyrrolidone in an amorphous sugar matrix below and above the glass transition temperature'. Together they form a unique fingerprint.

  • Cite this