Photostability of substituted 4-diethylaminoazobenzenes
| Autor: | Bruno Marcandalli, Francesca Fontana, Elena Selli, T. Caronna |
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| Jazyk: | angličtina |
| Rok vydání: | 2001 |
| Předmět: |
Process Chemistry and Technology
General Chemical Engineering Radical Photodissociation Settore CHIM/07 - Fondamenti Chimici delle Tecnologie Photochemistry Oxygen quenching Solvent Hexane chemistry.chemical_compound chemistry Diethylaminaozobenzenes Photodegradation Visible light Polymer chemistry Acetone Methanol Visible spectrum |
| Popis: | The stability to visible light of five 4-diethylaminoazobenzenes was investigated in different solvents under various experimental conditions, as well as in solid crystalline form and on dyed poly(ethyleneterephthalate). Though generally exhibiting relatively high photostability, all investigated dyes underwent photodegradation in acetone solution. Two different reaction paths were recognised in this solvent, depending on the nature and position of the substituting groups on the second aromatic ring, both involving the formation and subsequent fragmentation of organic free radicals, as suggested by the strong inhibiting effect of molecular oxygen on the photodegradation rate. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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