Synthesis and Electro-Optic Properties of Novel Polyester Containing Dioxybenzylidenecyanoacetate as a NLO-Chromophore

Abstract

A novel polyester (4) containing dioxybenzylidenecyanoacetate group as a NLO-chromophore was prepared and characterized. Polyester 4 was soluble in common organic solvents such as acetone and DMSO. Polymer 4 showed thermal stability up to 280 C in TGA thermogram with T g value measured from DSC thermogram near 108 C. The SHG coefficient (d 33 ) of poled polymer film at the 1064 nm fundamental wavelength was around 3.54 Â 10 À9 esu. The dipole alignment exhibited a thermal stability up to near T g and no significant SHG decay was observed below 95 C due to the partial main-chain character of polymer structure, which was acceptable for NLO device applications.

Preparation of Main-Chain Polymers Based on Novel Monomers with D−π–A Structure for Application in Organic Second-Order Nonlinear Optical Materials with Good Long-Term Stability

“…Otherwise, the larger first order hyperpolarizability could be estimated from the strong absorption in the UV–vis spectra. Versus the other NLO polymers with main chain structures reported before, the performance of NLO activity of PE-1 and PE-2 was very outstanding. This was due to the novel introduction of an electron acceptor with a multicyan five-membered ring.…”

Synthesis and electro-optic properties of novel X-type polyester containing dioxynitrobenzylidenecyanoacetate with highly enhanced thermal stability of dipole alignment

“…Side-chain NLO polymer systems have the advantages such as good solubility, homogeneity and high loading level of NLO chromophores, but they often suffer from poor stability of dipole alignments at high temperatures. Recently, we prepared novel Y-type polyesters containing dioxynitrostilbene [37,38], dioxybenzylidenemalononitrile [39][40][41], dioxybenzylidenecyanoacetate [42,43], tricyanovinylthienylcatechol [44], tricyanovinylthienylresorcinol [45], tricyanovinylthiazolylazoresorcinol [46], and dioxynitroazobenzene [47,48] as NLO chromophores. The resulting polymers exhibit enhanced thermal stability of second harmonic generation (SHG), which stems from the stabilization of dipole alignment of the NLO chromophores.…”

Synthesis and properties of novel X-type nonlinear optical polyester containing nitrophenylazonitroresorcinoxy group with highly enhanced SHG thermal stability

“…Side-chain NLO polymers have the advantages such as good solubility, homogeneity and high loading level of NLO chromophores, but they often suffer from poor stability of dipole alignments at high temperatures. Recently we prepared novel NLO polyesters containing dioxynitrostilbene [25,26], dioxybenzylidenemalononitrile [27e29], dioxybenzylidenecyanoacetate [30,31], tricyanovinylthienylcatechol [32], tricyanovinylthienylresorcinol [33], tricyanovinylthiazolylazoresorcinol [34], and dioxynitroazobenzene [35,36] as NLO chromophores. The resulting polymers exhibit enhanced thermal stability of second harmonic generation (SHG), which stems from the stabilization of dipole alignment of the NLO chromophores.…”