Unveiling thermal transitions of polymers in subnanometre pores

Takashi Uemura, Nobuhiro Yanai, Satoshi Watanabe, Hideki Tanaka, Ryohei Numaguchi, Minoru T. Miyahara, Yusuke Ohta, Masataka Nagaoka, Susumu Kitagawa

Research output: Contribution to journalArticlepeer-review

158 Citations (Scopus)


The thermal transitions of confined polymers are important for the application of polymers in molecular scale devices and advanced nanotechnology. However, thermal transitions of ultrathin polymer assemblies confined in subnanometre spaces are poorly understood. In this study, we show that incorporation of polyethylene glycol (PEG) into nanochannels of porous coordination polymers (PCPs) enabled observation of thermal transitions of the chain assemblies by differential scanning calorimetry. The pore size and surface functionality of PCPs can be tailored to study the transition behaviour of confined polymers. The transition temperature of PEG in PCPs was determined by manipulating the pore size and the pore-polymer interactions. It is also striking that the transition temperature of the confined PEG decreased as the molecular weight of PEG increased.

Original languageEnglish
Article number83
JournalNature communications
Issue number7
Publication statusPublished - 2010
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)


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