1 research outputs found
Electronic Absorption, Emission and Two-PhotonAbsorption Properties of Some Functional1,3,5-Triphenylbenzenes
We report herein the linear optical properties of some extended 1,3,5âtriphenylbenzene derivatives 1,3,5â[(1,â4âC6H4)CâĄC(4âC6H4X)]3(C6H3) (3âX; X=NO2, CN, H, OMe, NMe2, NPh2) and briefly discuss the twoâphoton absorption (2PA) crossâsections determined for the derivatives featuring the most electronârich substituents, contrasting their 2PA performance with the 2PA values previously gathered for their triphenylisocyanurate analogues N,Nâ,Nââ[(1,â4âC6H4)CâĄC(4âC6H4X)]3(N3{C(O)}3) (1âX). When functionalized by electronâreleasing substituents at their periphery, 3âX derivatives are potent substitutes for 1âX compounds in NLO applications, especially when maximal transparency is not required in the visible range. Some rationalization of this unexpected outcome is proposed based on DFT calculations.The CNRS (PICS program N8 7106 and LIA N8 1194) and ANR
(Isogate Project) are acknowledged for financial support. S.S is the
recipient of an Australian Postgraduate Award and thanks the
Rennes Metropole for a Mobility Grant, the Australian Nanotechnology
Network for an Overseas Grant, and the ANU for
travel support under the Higher Degree Research Students Travel
Grant Scheme. F.P. and A.N.N. thank the Region Bretagne for a
Ph.D. grant. Mireille Blanchard-Desce (UMR 5255, Bordeaux) is
acknowledged for providing providing access to two-photon
excited fluorescence facilities. M.G.H. thanks the Australian
Research Council (ARC) for financial support. We also acknowledge
the HPC resources of CINES and of IDRIS under the
allocations 2016-2017[x2016080649] made by GENCI (Grand
Equipement National de Calcul Intensif)