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Threading of various ‘U’ shaped bidentate axles into a heteroditopic macrocyclic wheel via NiII/ CuII templation

Abstract

Threading of ‘U’ shaped bent axles having diverse functionalities (Axle1-Axle10) is investigated by using a heteroditopic amido-amine macrocyclic (MC) wheel via NiII or CuII metal ion templation. These bent shaped axles are the derivatives of 4, 4' substituted 2, 2' bipyridine, which are composed of various terminal groups like alkene, alkyne, bromide, hydroxyl and azide. Such metallo [2]pseudorotaxanes are well characterised by ESI-MS, EPR and FT-IR spectroscopic studies, UV-Vis absorption studies, elemental analysis and Single-crystal X-ray diffraction studies wherever possible. Experimental evidences support 1:1:1 ternary complexation between MC, metal ion and axle. The single crystal X-ray structures of three CuII templated ternary complexes (PR1', PR3' and PR7') show the penta-coordination arrangement around the templating metal ion. Interestingly, judicious selection of chemical functionalities in the complementary wheel and axle components enables to show the existence of various covalent and non covalent interactions.

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Publication details

The article was received on 25 Feb 2017, accepted on 03 May 2017 and first published on 08 May 2017


Article type: Paper
DOI: 10.1039/C7DT00699C
Citation: Dalton Trans., 2017, Accepted Manuscript
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    Threading of various ‘U’ shaped bidentate axles into a heteroditopic macrocyclic wheel via NiII/ CuII templation

    P. Ghosh, M. Nandi, S. Santra and B. Akhuli, Dalton Trans., 2017, Accepted Manuscript , DOI: 10.1039/C7DT00699C

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