ISSN:
1436-2449
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Summary Very stable cation radicals of N, N, N′, N′-tetramethyl-p-phenylenediamine and N,N,N′,N′-tetramethylbenzidine were produced in poly(methyl methacrylate) matrix by the intense photoexcitation of pulsed UV lasers or by a focused Xenon lamp. The color of the ion radicals could be recognized even a year after the photoexcitation at room temperature, although the rate of fading was accelerated by raising the temperature to the glass-transition temperature of the polymer (ca. 120 °C). The light intensity dependence of the produced cation radicals proved the two-photonic nature of this photoionization.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00261984
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