Site specific Co(iii) sarcophagine binding in multi-component phosphonium and p-sulfonatocalix[4]arene systems
Document Type
Article
Publication Date
1-1-2011
Abstract
Co(iii) sarcophagine-type cage molecules, [Co(diCLsar)](3+) or [Co(HONOsar)](3+), form either 1 : 1 or 1 : 2 host-guest inclusion complexes with mono-phosphonium cations and sodium p-sulfonatocalix[4]arene in the solid state yielding complex I [p-sulfonatocalix[4]arene·Co(diCLsar)·2{benzyltriphenylphosphonium}], complex II [2{p-sulfonatocalix[4]arene}·Co(diCLsar)· {tetraphenylphosphonium}] and complex III [p-sulfonatocalix[4]arene·Co(HONOsar)·tetraphenylphosphonium]. The diversity of the structural types of these multi-component systems, including the orientation of the Co(iii) molecules in the cavities of the calixarenes, depends on the nature of their terminal functional groups. The secondary coordination interactions binding between the Co(iii) molecules and p-sulfonatocalix[4]arene have also been investigated in water using NMR techniques.
Keywords
Co(iii) sarcophagine
Divisions
Science
Publication Title
Dalton Transactions
Volume
40
Publisher
Royal Society of Chemistry
Additional Information
Chemistry Department, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia. ireneling@siswa.um.edu.my yatimah70@um.edu.my