Janus second-order nonlinear optical dendrimers: their controllable molecular topology and corresponding largely enhanced performance.

ABSTRACT: A new type of Janus dendrimers, consisting of two different side dendrons with the dipole orientation of the second-order nonlinear optical (NLO) chromophore moieties partially in a non-centrosymmetric direction, was intelligently designed and synthesized in order to enhance the macroscopic NLO performance and break through the limitation of NLO efficiency in the current molecular topological structure of azo chromophore-based polymers. This kind of Janus dendritic structure was constructed by the combination of convergent and divergent methods, with the utilization of a powerful "click chemistry reaction". The obtained three dendrimers, D-13N, D-17N and D-21N, show very high NLO performance, especially the dramatically enhanced NLO coefficient of 299 pm V^-1

SUBMITTER: Tang R 

PROVIDER: S-EPMC5365064 | biostudies-literature | 2017 Jan

REPOSITORIES: biostudies-literature