By James C. Taylor
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Additional resources for Advances in Chemistry Research, Volume 8
Example text
The similar effect of structural memory is reproduced in certain degree and on films TAC painted rodamine G by a technique described above. So, by heating (160ºС, more than 30 mines) can achieve practically full discoloration of such films that is presented on Figure 6 in the form of transition from a spectrum 1 to a spectrum 2 at considerable decrease in a visible band with λmax = 526 nm (νmax = 19 000 cm1 ). At the same time, a little big duration of heating for this purpose is required. Besides, 222 Yu.
In the conditions of the subsequent drying of films rigidity of a polymeric matrix and chain segments of the nearest environment dimers is restored come back to that balance of mechanical pressure which has been received at heating of films. Character of mutual displacement of dye molecules, components chromogene dimers simultaneously comes back.. Thus, considering nochromogenety individual molecules rodamineа B and chromogenety its physical dimmers, it is possible to describe specific effect of structural memory observed on spectra that cannot be made proceeding from representation about chromogenityи individual molecules of dye.
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