Complexation properties of upper- and lower-rim functionalized calix[4]arenes

Assiri, Yousif (2014) Complexation properties of upper- and lower-rim functionalized calix[4]arenes. Masters thesis, Memorial University of Newfoundland.

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Abstract

The work described in this thesis is concerned mainly with a study of the complexation properties of some new molecular receptors, which were synthesized by Dr. Shofiur Rahman in the research laboratory of Dr. Paris Georghiou at Memorial University. Their complexation properties with some Group 1, Group 2 and transition metal cation guests were studied. Chapter 1 provides an overview of calixarenes and supramolecular chemistry and the methods employed herein. In Chapter 2, as part of the on-going studies on the development of a microcantilever-based real-time device employing modified calixarene-derived sensing layers in a collaborative project with the research group of Dr. Luc Beaulieu in the Department of Physics and Physical Ocenaography at MUN, a study was undertaken to determine the solution-phase complexation properties of 5 and its ethyl analogue 6, using ¹H-NMR spectroscopic titrations. The work described in Chapter 3 concerns the study of the supramolecular complexation behaviour of tetra-n-butylammonium halides (TBAX: X = Cl¯, Br¯) in different commonly-employed deuterated solvents such as CD3OD, (CD₃)₂CO, CD₂Cl₂, CD₃CN and DMSO-d₆, using ¹H-NMR spectroscopy. Chapter 4, describes of new macrocyclic receptors namely, triazolyl-bridged naphthalene-calix[4]arenes, which were succssfully synthesised by Dr. Shofiur Rahman in the research laboratory of Dr. Paris Georghiou at MUN. In the study reported herein, their complexation properties with various metal ions were investigated using both fluorescence spectroscopy and ¹H-NMR spectroscopy.

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