TY - JOUR
T1 - Anomaly in rotational diffusion of photophysical probe near volume phase transition of copoly(acrylamide-acrylic acid) gels
T2 - Steady state and time-resolved fluorescence study
AU - Annaka, Masahiko
AU - Takagi, Hiroyuki
AU - Nakahira, Takayuki
PY - 1999
Y1 - 1999
N2 - 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.
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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U2 - 10.1143/jjap.38.l1439
DO - 10.1143/jjap.38.l1439
M3 - Article
AN - SCOPUS:0033355190
SN - 0021-4922
VL - 38
SP - L1439-L1442
JO - Japanese Journal of Applied Physics
JF - Japanese Journal of Applied Physics
IS - 12 A
ER -