Synthesis, characterization and third-order nonlinear optical properties of a dodecaruthenium organometallic dendrimer with a zinc(ii) tetraphenylporphyrin core

A new Zn(ii) porphyrin-based dendrimer (5(2)) containing twelve Ru(ii) alkynyl fragments, has been prepared following a convergent approach in two steps from 5,10,15,20-tetra(4-ethynylphenyl)porphyrinatozinc(ii) (6). The cubic nonlinear optical (NLO) properties of 5(2) and other derivatives of 6 have been measured by third-harmonic generation (THG) at 1907 nm and by Z-scan over the spectral range 500-1700 nm, revealing the remarkable NLO response of 5(2) in the near-IR range. These results highlight the beneficial role of the extended cross fourchee-like polymetallic structure of 5(2) on its third-order NLO properties.This research was supported by grants from the “Region Bretagne” (A. M. and G. G.) and the Australian Research Council (M. G. H.). The CNRS (PICS programs No. 5676 & 7106 and LIA Redochrom) and UEB/FEDER/RTR-Bresmat (EOPT 11MF422-02 Porphamp) are acknowledged for financial support. T. G., S. K. and J.-F. H. thank GENCI (Grand Equipment National de Calcul Intensif ) for HPC resources project GENCI A0030807367-gen7367). Drs. M. Reynolds (UMR 8537), A. Bondon and O. Mongin (UMR 6226) are acknowledged for assistance during spectroscopic characterizations

Synthesis, characterization and third-order nonlinear optical properties of a dodecaruthenium organometallic dendrimer with a zinc(ii) tetraphenylporphyrin core

International audienceA new Zn(ii) porphyrin-based dendrimer (52) containing twelve Ru(ii) alkynyl fragments, has been prepared following a convergent approach in two steps from 5,10,15,20-tetra(4-ethynylphenyl)porphyrinatozinc(ii) (6). The cubic nonlinear optical (NLO) properties of 52 and other derivatives of 6 have been measured by third-harmonic generation (THG) at 1907 nm and by Z-scan over the spectral range 500-1700 nm, revealing the remarkable NLO response of 52 in the near-IR range. These results highlight the beneficial role of the extended "cross fourchée"-like polymetallic structure of 52 on its third-order NLO properties