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Chapter
Photodegradation of Organic Photochromes
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Article
A comprehensive kinetic, thermodynamic and photochemical study of some spiro-indoline-oxazines
The thermoreversible photochromic reaction of spiro-indoline-oxazines to photo-merocyanines has been studied by stationary spectrophotometric techniques. Two methods are described for determining the molar abs...
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Article
A solid-state (CP-MAS)13C nuclear magnetic resonance study of selected photo(thermo)chromic spiro-(indolinonaphthoxazine)s
Liquid and solid-state13C NMR data are reported for three photo(thermo)chromic spiro-(indolinonaphthoxazine)s,1–3. The isotropic13C chemical shifts are almost identical in the solid state and in solution. Therefo...
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Chapter and Conference Paper
Laser Induced Surface Modification of Polymers
It has been shown that irradiation with ultraviolet light results in surface modification of polymeric materials due mostly to photooxidation, photografting and/or photodegradation. Depending on the wavelength...
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Article
A study of the chemical and morphological alterations of PS and PC surfaces induced by excimer laser treatments
The effect of laser irradiation on polystyrene (PS) and bisphenol-A polycarbonate (PC) has been studied by X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), optical microscopy and sur...
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Chapter
The Involvement of Free Radicals in the Metabolism of Drugs
The cytotoxycity of the anthracycline antitumour drugs results from multiple biochemical alterations of the cellular organization at several levels. The expression of the cytotoxic effects is subsequent to the...
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Chapter and Conference Paper
Studies on Some Trifluoromethyl Nitroxide Radicals by EPR Spectroscopy
The hyperfine splitting by 17O in (CF3)2N170• is 23.6 G which is appreciably larger than the 19.4 G reported for [(CH3)3C] 2N170• and indicates that the former radical has a relatively high spin density on oxygen...
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Chapter and Conference Paper
Quantum Mechanical Tunneling in Free Radical Reactions
Examples of free radical reactions are described for which convincing evidence for quantum-mechanical tunneling has been reported. They include: H-atom abstraction reactions by thermalized methyl radicals and ...