93323-34-3Relevant academic research and scientific papers
Azo-azulene derivatives as second-order nonlinear optical chromophores
Lacroix, Pascal G.,Malfant, Isabelle,Iftime, Gabriel,Razus, Alexandru C.,Nakatani, Keitaro,Delaire, Jacques A.
, p. 2599 - 2608 (2000)
The molecular and solid state nonlinear optical (NLO) properties of several (phenylazo)-azulenes are investigated. In particular, (4-nitrophenylazo)-azulene (2b) exhibits a quadratic hyperpolarizability (β(vec)) of 80 x 10-30 cm5 esu recorded at 1.907 μm by the electric field-induced second-harmonic (EFISH) technique. This molecular material, which crystallizes in the monoclinic noncentrosymmetric space group Pc, exhibits an efficiency 420 times that of urea in second-harmonic generation. The origin of the optical nonlinearity in azo-azulene is discussed in relation with crystal structures and semiempirical calculations within the INDO/SOS formalism, and compared with that of the well known disperse red one (DR1) organic dye.
Halogenation of 1-arylazo-azulenes
Razus, Alexandru C.,Birzan, Liviu,Razus, Stefan A.,Horga, Viorica
, p. 235 - 248 (2007/10/03)
The present investigation represents a study of the halogenation of 1-arylazo-azulenes with elemental halogens, with N-bromosuccinimide and with cupric halides with a view to synthesize the halogenated compounds and to establish the reaction mechanisms. T
