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Issue 1, 2019
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Novel cyclometallated 5-π-delocalized donor-1,3-di(2-pyridyl)benzene platinum(ii) complexes with good second-order nonlinear optical properties

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Abstract

Five new platinum(II) complexes bearing a cyclometallated 5-π-delocalized donor-1,3-di(2-pyridyl)benzene were prepared and fully characterized. Their second-order nonlinear optical (NLO) properties were determined by the Electric-Field Induced Second Harmonic generation (EFISH) technique, working in DMF solution with an incident wavelength of 1907 nm, whereas the dipole moments were determined by Density Functional Theory (DFT) calculations. Remarkably, the platinum(II) complex with a cyclometallated 5-guaiazulene-CH[double bond, length as m-dash]CH-1,3-di(2-pyridyl)benzene appears as a very good candidate for application in photonics, being characterized by the largest second-order NLO response. Besides, it appeared that the nature of substituents on thiophene, chosen as π-delocalized moiety in position 5 of the 1,3-di(2-pyridyl)benzene, strongly affects the NLO properties.

Graphical abstract: Novel cyclometallated 5-π-delocalized donor-1,3-di(2-pyridyl)benzene platinum(ii) complexes with good second-order nonlinear optical properties

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Supplementary files

Article information


Submitted
07 Sep 2018
Accepted
29 Nov 2018
First published
29 Nov 2018

Dalton Trans., 2019,48, 202-208
Article type
Paper

Novel cyclometallated 5-π-delocalized donor-1,3-di(2-pyridyl)benzene platinum(II) complexes with good second-order nonlinear optical properties

M. Fontani, E. Garoni, A. Colombo, C. Dragonetti, S. Fantacci, H. Doucet, J. Soulé, J. Boixel, V. Guerchais and D. Roberto, Dalton Trans., 2019, 48, 202
DOI: 10.1039/C8DT03622E

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