Metallo-Supramolecular Self-Assembly of a Multicomponent Ditrigon Based on Complementary Terpyridine Ligand Pairing
2016
Wang, Shih-Yu | Fu, Jun-Hao | Liang, Yen-Peng | He, Yun-Jui | Chen, Yu-Sheng | Chan, Yi-Tsu
Predesigned complementary complexation of two 2,2′:6′,2″-terpyridine-based ligands was established by installing 2,6-dimethoxyphenyl substituents at the terpyridyl 6,6″-positions, which provided ancillary ion–dipole interactions in the coordination process and extra π-stacking stabilization in the resultant heteroleptic complex. The high-fidelity self-recognition ligation afforded facile access to the quantitative self-assembly of multicomponent triangle [Cd₆L³₃L⁴₃] and ditrigon [Cd₁₅L³₆L⁵₃] (that is, a hexagon with six 120° angles and two alternating edge lengths). It was found that the linear 6,6″-substituted ditopic motif (L³) would be directed by the ligand geometry of L⁵ to selectively incorporate into the parallel homoleptic connections in the bilayered framework.
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