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Charge transport and nonlinear optical (NLO) responsive materials are of great interest for applications related to photonics, nanophotonics and optoelectronics, such as integrated optics, optical sensing, optical signal processing, optical computing, broad band optical communications, optical poling, optical limiting, etc. We recently described NLO behaviour of tetrathia[22]porphyrin(2.1.2.1)s, which depict reverse saturable absorption.
In continuation of our interest in designing new materials for charge transport as well as NLO applications, new Fc based chromophores were synthesized and their optical, NLO and electrochemical properties were investigated. The second-order nonlinear polarizabilities were determined using hyper-Rayleigh scattering (HRS) with femtosecond pulsed laser light at 840 nm. The dyads exhibit interesting structure-dependent NLO properties, which could be rationalized by correlating optical with electrochemical data. |