Photo-induced colour generation and colour erasing switched by the sol–gel phase transition

2003 ◽  
pp. 344-345 ◽  
Author(s):  
Tao Yi ◽  
Kazuki Sada ◽  
Kazunori Sugiyasu ◽  
Tsukasa Hatano ◽  
Seiji Shinkai
Keyword(s):  
Phase Transition ◽  
Sol Gel ◽  
Gel Phase ◽  
Colour Generation

Sol-gel phase transition of brucine-appended porphyrin gelator: a study by vibrational circular dichroism spectroscopy

2002 ◽  
Vol 13 (24) ◽  
pp. 2661-2666 ◽  
Author(s):  
Vladimı́r Setnička ◽  
Marie Urbanová ◽  
Statis Pataridis ◽  
Vladimı́r Král ◽  
Karel Volka
Keyword(s):  
Phase Transition ◽  
Circular Dichroism ◽  
Sol Gel ◽  
Circular Dichroism Spectroscopy ◽  
Vibrational Circular Dichroism ◽  
Gel Phase ◽  
Circular Dichroïsm

Quater-, Quinque-, and Sexithiophene Organogelators: Unique Thermochromism and Heating-Free Sol-Gel Phase Transition

2005 ◽  
Vol 11 (16) ◽  
pp. 4735-4742 ◽  
Author(s):  
Shin-ichiro Kawano ◽  
Norifumi Fujita ◽  
Seiji Shinkai
Keyword(s):  
Phase Transition ◽  
Sol Gel ◽  
Gel Phase

The effects of sucrose on the sol-gel phase transition and viscoelastic properties of potato starch solutions

2019 ◽  
Vol 271 ◽  
pp. 94-101 ◽  
Author(s):  
Piotr Owczarz ◽  
Magdalena Orczykowska ◽  
Anna Rył ◽  
Patryk Ziółkowski
Keyword(s):  
Phase Transition ◽  
Viscoelastic Properties ◽  
Potato Starch ◽  
Sol Gel ◽  
Gel Phase

Gelation of PAAm-PVP composites: A fluorescence study

2014 ◽  
Vol 28 (20) ◽  
pp. 1450122 ◽  
Author(s):  
Gülşen Akin Evingür ◽  
Hakan Kaygusuz ◽  
F. Bedia Erim ◽  
Önder Pekcan
Keyword(s):  
Phase Transition ◽  
Free Radical ◽  
Classical Result ◽  
Fluorescence Spectra ◽  
Sol Gel ◽  
Vinyl Pyrrolidone ◽  
Fluorescence Study ◽  
New Class ◽  
Hybrid Hydrogels ◽  
Gel Phase

Hybrid hydrogels are a new class of composite materials. Polyacrylamide (PAAm) hydrogels are mainly produced by free radical crosslinking copolymerization (FCC) of AAm in the presence of N, N′-methylene bis (acrylamide) (BIS) as the crosslinker. Pyranine doped PAAm-poly (N-vinyl pyrrolidone) (PVP) composite were prepared with different amounts of PVP varying in the range between 0.0015 and 0.1 gr. It was observed that pyranine molecules as a fluoroprobe bind to AAm and PVP chains upon the initiation of the polymerization, causing the fluorescence spectra of the bonded pyranines shift to the shorter wavelengths. The sol–gel phase transition and its universality were monitored and tested as a function of PVP contents. Observations around the critical point show that the gel fraction exponent, β, agreed with the percolation result for below 0.025 gr PVP contents. However, classical result was observed above 0.0125 gr PVP content.

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