Study of the photoreaction of new triazene derivatives in solution and in polymer binder

Triazenes are molecular systems that undergo a photolysis with the evolution of molecular nitrogen. A set of aryltriazene bearing different substituents are synthesized and characterized. The photoreaction is studied in solution by means of UV-vis spectroscopy showing a large dependence of required doses and UV-vis spectrum evolution on the substituent position and character. The structural changes upon the photolysis are also probed using vibrational spectroscopy (IR and Raman). Moreover, GC-MS spectroscopy is employed to retrieve the structure of the main photoproducts. The most promising derivative, in terms of stability and band position is incorporated in different polymer matrices, both thermosetting and thermoplastic; its photoreaction is studied in correlation with the polymer structure.