A ‘donor-free’ chromophore with a silicon-based acceptor group for second order nonlinear optics
Articolo
Data di Pubblicazione:
2022
Citazione:
A ‘donor-free’ chromophore with a silicon-based acceptor group for second order nonlinear optics / A. Orbelli Biroli, F. Tessore, G. Di Carlo, S. Righetto, A. Forni, P. Fantucci, M. Pizzotti. - In: INORGANICA CHIMICA ACTA. - ISSN 0020-1693. - 533:(2022 Apr 01), pp. 120745.1-120745.9. [10.1016/j.ica.2021.120745]
Abstract:
In this paper we report an investigation on the linear and nonlinear properties of a non-classic push-pull molecule, based on the molecular design concept of a ‘donor-free’ chromophore. Herein a terthiophene unit acts both as a donor and a π-spacer group and a tris(trimethylsiloxy)silane substituent as an acceptor group. This latter can represent a model of a fragment of silica surface and it has been compared with a classic acceptor unit like the nitro group. The ‘donor-free’ chromophores have also been compared to more typical push-pull chromophores by replacing the terthiophene unit with the N,N-dimethylamino donor group.
Despite the silane group only slightly impacts on the electronic and linear properties of the terthiophene, our results reveal high μβEFISH values for silane-functionalized derivatives producing a NLO activity stronger than that of the nitro substituted. Finally, the investigated ‘donor-free’ NLO-phore exhibits interesting physical properties relevant in term of nonlinearity/transparency trade-off, a highly desired requirement for second-order NLO materials.
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
A. Orbelli Biroli, F. Tessore, G. Di Carlo, S. Righetto, A. Forni, P. Fantucci, M. Pizzotti
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