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Issue 34, 2020
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Use of a cyclo-P4 building block – a way to networks of host–guest assemblies

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Abstract

Despite the proven ability to form supramolecular assemblies via coordination to copper halides, organometallic building blocks based on four-membered cyclo-P4 ligands find only very rare application in supramolecular chemistry. To date, only three types of supramolecular aggregates were obtained based on the polyphosphorus end-deck complexes CpRTa(CO)24-P4) (1a: CpR = Cp′′; 1b: CpR = Cp′′′), with none of them, however, possessing a guest-accessible void. To achieve this target, the use of silver salts of the weakly coordinating anion SbF6 was investigated as to their self-assembly in the absence and in the presence of the template molecule P3Se4. The two-component self-assembly of the building block 1a and the coinage-metal salt AgSbF6 leads to the formation of 1D or 3D coordination polymers. However, when the template-driven self-assembly was attempted in the presence of an aliphatic dinitrile, the unprecedented barrel-like supramolecular host–guest assembly P3Se4@[{(Cp′′Ta(CO)24-P4))Ag}8]8+ of 2.49 nm in size was formed. Moreover, cyclo-P4-based supramolecules are connected in a 2D coordination network by dinitrile linkers. The obtained compounds were characterised by mass-spectrometry, 1H and 31P NMR spectroscopy and X-ray structure analysis.

Graphical abstract: Use of a cyclo-P4 building block – a way to networks of host–guest assemblies

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Supplementary files

Article information


Submitted
19 Jun 2020
Accepted
08 Aug 2020
First published
12 Aug 2020

This article is Open Access
All publication charges for this article have been paid for by the Royal Society of Chemistry

Chem. Sci., 2020,11, 9067-9071
Article type
Edge Article

Use of a cyclo-P4 building block – a way to networks of host–guest assemblies

E. Peresypkina, M. Bielmeier, A. Virovets and M. Scheer, Chem. Sci., 2020, 11, 9067 DOI: 10.1039/D0SC03437A

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