Dicy anomethylene

Although the synthesis of each chromophore material is to some extent unique (and hence requires individual description which is beyond the scope of this review), most chromophores used for device prototyping involve amine donor moieties. Thus, once a large quantity of aldehyde-terminated amine do-nor/partial bridge material has been synthesized, it can be reacted via Knoeve-nagel condensation with a variety of acceptor groups to form different series of chromophores. The acceptor in Schemes 1-4 is 3-cyano-5,5-dibutyl-2-dicy-anomethylene-4-methyl-2,5-dihydrofuran (which we refer to as the cyanofuran, CF, acceptor). This is synthesized by a literature method [213]. 

Kolev, T., I. Kityk, J. Ebothe, and B. Sahraoui. 2007. Intrinsic hyperpolarizability of 3 -dicy anomethylene-5,5 -dimethyl-1 - [2-(4-hydroxyphenyl)ethenyl)] -cyclohexene nanocrystaUites incorporated into the photopolymer matrices. Chem. Phys. Lett. 443 309-312. 

---