Heterocyclical chromophore architectures with novel electronic acceptor systems

Abstract

NLO chromophores for the production of first-, second, third- and / or higher order polarizabilities of the form of Formula I: R ( P ) Acc1 .Q4- Acc3 S / ^Q1' n Acc4 Y A Formula I and the commercially acceptable salts, solvates and hydrates thereof, wherein n, p, X , Acc Z1*4, Q1''5, p\ D and A have the definitions provided herein.

Description

Background of the invention [0001] Polymeric electro-optic (EO) materials have shown great potential in core applications for a wide range of systems and devices, including phased-array radar, satellite and fiber optic communications, cable TV (CATV), for aviation and missile guidance Optical gyroscopes, electronic countermeasures (ECM) systems, backplane interconnects for high-speed computing, ultrafast analog-to-digital conversion, mine detection, radio frequency photonics, spatial light modulation, and all-optical (light-to-light conversion) signal processing. [0002] In the presence of an externally applied electric field or incident light, nonlinear optical materials are capable of changing their first-, second-, third-, and higher-order polarizability (two-photon absorption). In telecommunication applications, second-order susceptibility (hyperpolarizability or β) and third-order susceptibility (second-order hyperpolarizability or γ) are currently of great interest. Hy...

AI Technical Summary

Problems solved by technology

Although increasing the length of these chains generally improves NLO properties, there is little or no improvement in material performance once these chains exceed about 2 nm

It is hypothesized that this is mainly due to: (i) bending and rotation of the conjugated atomic chains, which disrupts the π-conduction of the system and thus reduces the resulting NLO properties; and (ii) the intrinsic polarity of this macromolecular system to the material matrix Orientational instability due to environmental space inhibition

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