342045-14-1Relevant articles and documents
Synthesis and property studies of cyclotrisazobenzenes
Reuter, Raphael,Hostettler, Nik,Neuburger, Markus,Wegner, Hermann A.
supporting information; experimental part, p. 5647 - 5652 (2010/02/28)
Azobenzenophanes are fascinating macrocycles, which are of special interest due to their unique photochromic behavior. Cyclotrisazobenzenes 2 (R = H, Br, tBu) were prepared to probe how much strain the photoisomerization of the azobenzene motive can tolerate. The macrocycles were synthesized in an overall yield of 10-20% from oriho-phenylenediamine (6). Solid-state structures of cyclotrisazobenzenes 2a and 2b were obtained. Irradiation under various conditions did not induce any isomerization.