Behavior of binary guests in a porous coordination polymer

Nobuhiro Yanai, Takashi Uemura, Susumu Kitagawa

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Controlling the condensed state of multiple guests in nanoporous media is critical to many applications, but an understanding of this phenomenon in pores smaller than a few nanometers is still unavailable. In this work, we investigate the aggregation state of binary guests, poly(ethylene glycol) (PEG), and long-chain normal alkanes, in subnanometer channels of a porous coordination polymer (PCP) by monitoring their thermal transition behaviors. PEG and alkanes are immiscible in the bulk and their melting transitions are not affected by each other. Meanwhile, in the PCP nanochannels, the transition temperature and the heat of the binary-guest system were significantly different from when PEG or an alkane was individually included. This suggests the formation of microscopically segregated domain structures of PEG and alkane in the host crystal. The transition behaviors gradually varied by changing the introduction ratio between PEG and alkane, and thus the aggregation states of the two guests were successfully controlled by the simple variation of relative amounts. This methodology offers a promising route to control spatial configurations of multiple guest molecules in nanoporous matrices for advanced applications.

Original languageEnglish
Pages (from-to)4744-4749
Number of pages6
JournalChemistry of Materials
Volume24
Issue number24
DOIs
Publication statusPublished - Dec 21 2012

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Alkanes
Polyethylene glycols
Polymers
Paraffins
Agglomeration
Superconducting transition temperature
Melting
Crystals
Molecules
Monitoring

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

Cite this

Behavior of binary guests in a porous coordination polymer. / Yanai, Nobuhiro; Uemura, Takashi; Kitagawa, Susumu.

In: Chemistry of Materials, Vol. 24, No. 24, 21.12.2012, p. 4744-4749.

Research output: Contribution to journalArticle

Yanai, Nobuhiro ; Uemura, Takashi ; Kitagawa, Susumu. / Behavior of binary guests in a porous coordination polymer. In: Chemistry of Materials. 2012 ; Vol. 24, No. 24. pp. 4744-4749.
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