Anthracene endcaps

FIGURE 1.7 Absorption and emission spectra of the anthracene-endcapped PPE in dilute solution. For a detailed comparison among the spectra of the model polymer, anthracene, and this polymer, please see the original literature. (Source Ref. [24].)... 

Scheme 8-18 Template synthesis via double Diels-Alder cycloaddition of anthracene endcaps to norbomadiene oligomers.

Similar functionalization chemistry with the (NBD)4-derived diester 50 afforded the trichloroacetyl, phenylthiomethacrylate-bearing template 67 whose initiator-terminator pair spans an approximately 17 A gap (Scheme 8-20). Single-crystal X-ray analysis of the phenylthio-containing species 63 provided a detailed glimpse of the fully functionalized template (63, Scheme 8-20). The anthracene-derived endcaps appear bowed slightly away from the apical exo hydrogens of the proximal norbomane units, as predicted by the molecular mechanics-based structural model 63". These distortions are unlikely to have any consequence for the planned chemistry. 

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