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

Areej Merhi (1) , Guillaume Grelaud (1, 2) , Mahbod Morshedi (2) , Seyfallah Abid (1) , Katy A Green (2) , Adam Barlow (2) , Thomas Groizard (1) , Samia Kahlal (1) , Jean-François Halet (1) , Hoang Minh Ngo (3) , Isabelle Ledoux (3) , Marie P Cifuentes (2) , Mark G Humphrey (2) , Frédéric Paul (1) , Christine O Paul-Roth (1)

1 ISCR - Institut des Sciences Chimiques de Rennes
2 ANU - Australian National University
3 LPQM - Laboratoire de Photonique Quantique et Moléculaire

A 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.

Domains: Chemical Sciences; Coordination chemistry

Areej Merhi, Guillaume Grelaud, Mahbod Morshedi, Seyfallah Abid, Katy A Green, et al.. Synthesis, characterization and third-order nonlinear optical properties of a dodecaruthenium organometallic dendrimer with a zinc(ii) tetraphenylporphyrin core. Dalton Transactions, 2018, 47 (32), pp.11123-11135. ⟨10.1039/c8dt02301h⟩. ⟨hal-01862456⟩