Stilbene-like molecules

In order to round-off our overview on the symmetric compounds of this class, we add the stilbene-like molecules TTPAE (20) (Tg = 111°C) [27], the bis-(styryl)anthracene (BSA, 21) [64], and DPVBi (22) [65] (Fig. 3.9). Compounds 20 and 21 are characterized by a rigid structure leading to a large electronic delocalization through the center of the molecules. Compound 22 is more flexible due to the biphenyl bond. The outer phenyl rings are twisted by steric repulsion, leading to a nonplanar structure of the stilbene units. 

Stilbenes and Stilbene-Like Molecules, Cis-Trans Photoisomerization of... 

As already outlined, the singlet mechanism is well established for stilbene and cyanostilbenes under practically all experimental conditions. It is also suggested for 1,1 -diphenyl-, triphenyl-, and tetraphenylethylene, that is, stilbene-like molecules with identical isomers. The singlet mechanism occurs... 

Goerner, H., and Kuhn, H. J. "Cis-Trans Photoisomerization of Stilbenes and Stilbene-Like Molecules." Adv. Photochem., 19,1 (1995). 

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