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Issue 9, 2016
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Face and edge directed self-assembly of Pd12 tetrahedral nano-cages and their self-sorting

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Abstract

Reactions of a cis-blocked Pd(II) 90° acceptor [cis-(tmeda)Pd(NO3)2] (M) with 1,4-di(1H-tetrazol-5-yl)benzene (H2L1) and [1,3,5-tri(1H-tetrazol-5-yl)benzene] (H3L2) in 1 : 1 and 3 : 2 molar ratios respectively, yielded soft metallogels G1 and G2 [tmeda = N,N,N′,N′-tetramethylethane-1,2-diamine]. Post-metalation of the gels G1 and G2 with M yielded highly water-soluble edge and face directed self-assembled Pd12 tetrahedral nano-cages T1 and T2, respectively. Such facile conversion of Pd(II) gels to discrete tetrahedral metallocages is unprecedented. Moreover, distinct self-sorting of these two tetrahedral cages of similar sizes was observed in the self-assembly of M with a mixture of H2L1 and H3L2 in aqueous medium. The edge directed tetrahedral cage (T1) was successfully used to perform Michael reactions of a series of water insoluble nitro-olefins assisted by encapsulation into the cage in aqueous medium.

Graphical abstract: Face and edge directed self-assembly of Pd12 tetrahedral nano-cages and their self-sorting

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Submitted
08 May 2016
Accepted
19 May 2016
First published
20 May 2016

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

Chem. Sci., 2016,7, 5893-5899
Article type
Edge Article

Face and edge directed self-assembly of Pd12 tetrahedral nano-cages and their self-sorting

P. Howlader and P. S. Mukherjee, Chem. Sci., 2016, 7, 5893
DOI: 10.1039/C6SC02012G

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