Organic second-order non-linear optical chromophore with D-Pi-A structure and decorated by tree-like group, synthesizing method and application thereof

Abstract

The invention relates to an organic second-order non-linear optical chromophore with a D-Pi-A structure and decorated by a tree-like group, and a synthesizing method and applications thereof. The chromophore of the invention introduces a thiophene ring conjugated Pi electronbridge having stronger electrical transmission capacity and containing branched chains and a tricyano pyrroline receptor having strong electron-withdrawing property; the receptor end is introduced into the tree-like decorative group, the one-order hyperpolarizability of chromophore molecules is greatly improved; the solubility and the film forming ability of the chromophore in polymer is improved, the interaction force among the molecules is reduced. The second-order non-linear optical chromophore with the following structure is doped with polymers, such as amorphous polycarbonate or polymethylmethacrylate and the like according to the mass ratio of 1:10; the electro-optical coefficient of the obtained polarized polymeric materials achieves 217pm/V; in addition, the donor and receptor of the chromophore can be introduced into a crosslinkable group, thus improving oriented stability of the chromophore in polymer, and satisfying the requirements of devices.

Description

technical field The invention relates to the field of organic second-order nonlinear optical materials, in particular to an organic second-order nonlinear optical chromophore with a D-π-A structure modified by a dendritic group with high electro-optic activity and its synthesis method and application . Background technique In the current society, laser and optical fiber communication are replacing microelectronics and integrated circuit technology and becoming emerging communication technologies. As two cutting-edge disciplines of laser communication and optical fiber communication: integrated optics and optoelectronics have achieved rapid development. The integrated optical system includes important devices such as waveguides, optical switches, and optical converters, and nonlinear optical materials must be used in these devices. At present, the nonlinear optical materials that are widely used in practice are mainly inorganic crystal materials. Compared with inorganic cr...

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Problems solved by technology

A series of chromophores containing pyrroline electron acceptors reported in Chem.Mater., Vol.18, No.13, 2006 and US Patent No. 7307173B1 have higher first-order molecular hyperpolarizability, but these chromophores Due to the large intermolecular interaction force in the polymer, the polarization efficiency is not high, and the electro-optical coefficient is small, which cannot meet the requirements of deviceization.

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