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

doi:10.1143/jjap.38.l1439

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

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

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.

Original language	English
Pages (from-to)	L1439-L1442
Journal	Japanese Journal of Applied Physics, Part 2: Letters
Volume	38
Issue number	12 A
DOIs	https://doi.org/10.1143/jjap.38.l1439
Publication status	Published - 1999
Externally published	Yes

All Science Journal Classification (ASJC) codes

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

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Anomaly in rotational diffusion of photophysical probe near volume phase transition of copoly(acrylamide-acrylic acid) gels : Steady state and time-resolved fluorescence study. / Annaka, Masahiko; Takagi, Hiroyuki; Nakahira, Takayuki.

In: Japanese Journal of Applied Physics, Part 2: Letters, Vol. 38, No. 12 A, 1999, p. L1439-L1442.

Research output: Contribution to journal › Article › peer-review

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

Abstract

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