Second-order nonlinear optical dendrimers containing different types of isolation groups: convenient synthesis through powerful click chemistry and large NLO effects

In this paper, two series of dendrimers, which contain normal phenyl or pentafluorophenyl as the end-capped group, were conveniently prepared with high purity and satisfactory yields, through the combination of divergent and convergent approaches, coupled with the utilization of the powerful Sharpless click reaction. Due to the Ar-Ar-F self-assembly effect, as well as their perfect 3D structure and the isolation effects of the interior triazole rings, G4-PFPh-TB exhibited a very large d(33) value of 252 pm V-1, which should be one of the highest values for simple azo chromophore moieties.