Cation-based Structural Tuning of Pyridine Dipyrrolate Cages and Morphological Control over Their Self-assembly

Journal of the American Chemical Society
Huacheng ZhangJonathan L Sessler

Abstract

Different pyridine dipyrrolate cages including cage-based dimers and polymers may be fabricated in a controlled manner from the same two starting materials, namely, an angular ligand 1 and Zn(acac)2, by changing the counter cation source. With tetrabutylammonium (TBA+) and dimethyl viologen (DMV2+), Cage-3 and Cage-5 are produced. In these cages, two ligands act as bridges and serve to connect together two cage subunits to produce higher order ensembles. In Cage-3 and Cage-5, the TBA+ and DMV2+ counter cations lie outside the cavities of the respective cages. This stands in contrast to what is seen with a previously reported system, Cage-1, wherein dimethylammonium (DMA+) counter cations reside within the cage cavity. When the counter cations are tetraethylammonium (TEA+) and bis(cyclopentadienyl) cobalt(III) (Cp2Co+), polymeric cage materials, PC-1 and PC-2, are formed, respectively. The counter cations thus serve not only to balance charge but also to tune the structural features as a whole. The organic cations used in the present study also act to modulate the further assembly of individual cages. The present cation-based tuning emerges as a new method for a fine-tuning of the multidimensional morphology of self-assembled in...Continue Reading

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Citations

Nov 7, 2019·Angewandte Chemie·Honghong DuanLiping Cao
Apr 5, 2020·Nanomaterials·Huacheng ZhangHui Fu
Jun 17, 2020·Organic & Biomolecular Chemistry·Huacheng Zhang, Jie Han
Mar 15, 2020·Materials·Huacheng ZhangJian Shen
Apr 4, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Fei WangAtanu Jana
Jan 16, 2020·Journal of the American Chemical Society·Yan-Qin HePeter J Stang
Oct 27, 2021·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Shuai CaoZhaona Liu

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