52316-13-9Relevant academic research and scientific papers
Solid Phase Photoaddition of Benzophenone to Diphenylamine
Sidhu, K. S.,Bansal, W. R.,Jaswal, S. K.
, p. 910 - 914 (2007/10/02)
Solid phase photolysis at 366 nm of a mixture of benzophenone and diphenylamine as such and in pellets of KBr, KCl and NaCl gives 4-anilinophenyldiphenylmethanol (carbinol) and tetraphenylhydrazine (TPH) whereas excitation in the charge transfer band of the reactants leads to deactivation only.The reaction extent per unit time increases in the presence of oxalic acid with a concomitant decrease in THP yield.The reactions in the presence and absence of the acid follow different paths.The temperature effect is non-Arrhenius.It has been shown that the products are formed through a surface reaction where the ionic lattice of the solids helps the transport of the charged ions and prevents the back recombination of the geminate pairs which readily occurs in the aqueous phase.A mechanism consistent with the various observed features of the system has been given and it has been shown that TPH does not arise from triplet diphenylamine and is indeed a result of the unique configuration of molecules in the solid surface.
