Anomaly in rotational diffusion of photophysical probe near volume phase transition of copoly(acrylamide-acrylic acid) gels: Steady state and time-resolved fluorescence study

Masahiko Annaka, Hiroyuki Takagi, Takayuki Nakahira

研究成果: ジャーナルへの寄稿記事

2 引用 (Scopus)

抄録

Changes in the microenvironment of pyrene-labeled copoly(acrylamide-acrylic acid) gels are investigated by means of fluorescence spectroscopy. An anomaly in the microscopic motion of a pyrenyl probe was observed in the vicinity of the phase transition: the average lifetime of monomer emission approached zero, and the rotational diffusion constant of pyrenyl probe became infinite. Density fluctuation and the nonequilibrium situation near the phase transition are considered to cause the rapid microscopic fluctuation of the network and solvent molecule.

元の言語英語
ジャーナルJapanese Journal of Applied Physics, Part 2: Letters
38
発行部数12 A
出版物ステータス出版済み - 12 1 1999
外部発表Yes

Fingerprint

acrylic acid
Acrylics
Gels
Phase transitions
Fluorescence
gels
anomalies
fluorescence
Acids
probes
Pyrene
Fluorescence spectroscopy
pyrenes
monomers
Monomers
life (durability)
Molecules
causes
spectroscopy
molecules

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)

これを引用

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abstract = "Changes in the microenvironment of pyrene-labeled copoly(acrylamide-acrylic acid) gels are investigated by means of fluorescence spectroscopy. An anomaly in the microscopic motion of a pyrenyl probe was observed in the vicinity of the phase transition: the average lifetime of monomer emission approached zero, and the rotational diffusion constant of pyrenyl probe became infinite. Density fluctuation and the nonequilibrium situation near the phase transition are considered to cause the rapid microscopic fluctuation of the network and solvent molecule.",
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AU - Nakahira, Takayuki

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AB - Changes in the microenvironment of pyrene-labeled copoly(acrylamide-acrylic acid) gels are investigated by means of fluorescence spectroscopy. An anomaly in the microscopic motion of a pyrenyl probe was observed in the vicinity of the phase transition: the average lifetime of monomer emission approached zero, and the rotational diffusion constant of pyrenyl probe became infinite. Density fluctuation and the nonequilibrium situation near the phase transition are considered to cause the rapid microscopic fluctuation of the network and solvent molecule.

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