209159-68-2

Upstream product

• 109-77-3 malononitrile 
• 209159-67-1 3,4-di-(2'-vinyloxyethoxy)benzaldehyde 
• 139-85-5 3,4-dihydroxybenzaldehyde 

Downstream Products

• 117392-30-0 [3,4-di(2'-hydroxyethoxy)benzylidene]malononitrile 

Relevant academic research and scientific papers

Synthesis and nonlinear optical properties of novel polyester containing dicyanovinylnitrocatecholic group

A novel X-type polyester containing 4-(2′,2′-dicyanovinyl)-5-nitrocatecholic groups as nonlinear optical (NLO) chromophores, which constitute part of the polymer backbone, was prepared and characterized. The polyester is soluble in common organic solvents such as N,N-dimethylformamide and acetone. It shows a thermal stability up to 300°C from thermogravimetric analysis with glass-transition temperature obtained from differential scanning calorimetry of near 105°C. The second harmonic generation (SHG) coefficient (d33) of a poled polymer film at the 1064?nm fundamental wavelength is 5.31 × 10?9 esu. The dipole alignment exhibits a thermal stability even at 5°C higher than glass-transition temperature (Tg), and no significant SHG decay is observed below 110°C due to the partial main-chain character of polymer structure, which is acceptable for NLO device applications.

Synthesis and properties of novel Y-type nonlinear optical polyester with enhanced thermal stability of dipole alignment

3,4-Di-(2'-hydroxyethoxy)benzylidenemalononitrile (3) was prepared and condensed with terephthaloyl chloride to yield novel Y-type polyester (4) containing the NLO-chromophores dioxybenzylidenemalononitrile group, which constituted parts of the polymer ba

Synthesis and electro-optic properties of novel Y-type polyurethanes having dioxybenzylidenemalononitrile

3,4-Di-(2′-hydroxyethoxy)benzylidenemalononitrile (3) was prepared and condensed with 2,4-toluenediisocyanate and 3,3′-dimethoxy-4,4′- biphenylenediisocyanate to yield unprecedented novel Y-type polyurethanes (4-5) containing 3,4-dioxybenzylidenemalononitrile group as a NLO-chromophore, which is a part of the polymer main chain. The resulting polyurethanes 4-5 were soluble in common organic solvents such as acetone and DMF. Polymers 4-5 showed a thermal stability up to 280°C in TGA thermograms with Tg values from DSC thermograms in the range of 148-152°C. The SHG coefficients (d33) of poled polymer films were around 5.96 × 10-9 esu. These poled polymer films exhibited greater thermal stabilities of dipole alignments even at 20°C higher than Tg due to the partial main chain character of the polymer structure, which is acceptable for NLO device applications. Copyright Taylor & Francis Inc.