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Issue 43, 2012
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Metal self-recognition: a pathway to control the formation of dihelicates and mesocates

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Abstract

We have studied the factors that affect the formation of different metallosupramolecular architectures by metal direct self-assembly. A synthetic route has been developed to obtain mesocates or dihelicates selectively. For this purpose a series of five bisthiosemicarbazone ligands derived from 1,3-diacetylbenzene were designed and synthesised. Namely H2LMe, H2LEt, H2LPh, H2LPhN and H2LPhOMe with different substituents on the 4-N terminal position of the thiosemicarbazone strands. The Co(II), Zn(II) and Cd(II) complexes of these ligands were prepared by an electrochemical procedure. Crystallographic studies revealed the formation of mesocates for Co(II) and Zn(II) metal ions whereas the Cd(II) complexes gave a bishelical supramolecular structure. Therefore these bisthiosemicarbazone ligands enable the selective isolation of mesocate or dihelicate complexes by using a specific metal ion.

Graphical abstract: Metal self-recognition: a pathway to control the formation of dihelicates and mesocates

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Publication details

The article was received on 02 Aug 2012, accepted on 06 Sep 2012 and first published on 07 Sep 2012


Article type: Paper
DOI: 10.1039/C2DT31770B
Dalton Trans., 2012,41, 13395-13404

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    Metal self-recognition: a pathway to control the formation of dihelicates and mesocates

    M. Martínez-Calvo, M. J. Romero, R. Pedrido, A. M. González-Noya, G. Zaragoza and M. R. Bermejo, Dalton Trans., 2012, 41, 13395
    DOI: 10.1039/C2DT31770B

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