Xuan, W., Pow, R., Watfa, N., Zheng, Q., Surman, A. J. , Long, D.-L. and Cronin, L. (2019) Stereoselective assembly of gigantic chiral molybdenum blue wheels using lanthanide ions and amino acids. Journal of the American Chemical Society, 141(3), pp. 1242-1250. (doi: 10.1021/jacs.8b09750) (PMID:30495944) (PMCID:PMC6351008)
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Abstract
The synthesis of chiral polyoxometalates (POMs) is a challenge because of the difficulty to induce the formation of intrinsically chiral metal-oxo frameworks. Herein we report the stereoselective synthesis of a series of gigantic chiral Mo Blue (MB) POM clusters 1–5 that are formed by exploiting the synergy between coordinating lanthanides ions as symmetry breakers to produce MBs with chiral frameworks decorated with amino acids ligands; these promote the selective formation of enantiopure MBs. All the compounds share the same framework archetype, based on {Mo124Ce4}, which forms an intrinsically chiral Δ or Λ configurations, controlled by the configurations of functionalized chiral amino acids. The chirality and stability of 1–5 in solution are confirmed by circular dichroism, 1H NMR, and electrospray ion mobility–mass spectrometry studies. In addition, the framework of the {Mo124Ce4} MB not only behaves as a host able to trap a chiral {Mo8} cluster that is not accessible by traditional synthesis but also promotes the transformation of tryptophan to kynurenine in situ. This work demonstrates the potential and applicability of our synthetic strategy to produce gigantic chiral POM clusters capable of host–guest chemistry and selective synthetic transformations.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Xuan, Mr Weimin and Watfa, Dr Nancy and Pow, Mr Robert William and Zheng, Ms Qi and Long, Dr Deliang and Cronin, Professor Lee and Surman, Dr Andrew |
| Authors: | Xuan, W., Pow, R., Watfa, N., Zheng, Q., Surman, A. J., Long, D.-L., and Cronin, L. |
| College/School: | College of Science and Engineering > School of Chemistry |
| Journal Name: | Journal of the American Chemical Society |
| Publisher: | American Chemical Society |
| ISSN: | 0002-7863 |
| ISSN (Online): | 1520-5126 |
| Published Online: | 29 November 2018 |
| Copyright Holders: | Copyright © 2018 American Chemical Society |
| First Published: | First published in Journal of the American Chemical Society 141(3): 1242-1250 |
| Publisher Policy: | Reproduced under a Creative Commons License |
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