Calixarene hexacarboxylic acid binds instantly and with low symmetry to Pb, Sr and Ba. Later a highly symmetric up-down alternating conformation emerges. The solution structures are identical to their p-tert-butylcalixarene hexacarboxylic acid counterparts. With either receptor,
an octahedral cage is formed around the metal. The transformation from low to high symmetry however proceeds at significantly faster rates for the de-t-butylated host.
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Document Type: Research Article
Department of Chemistry and Biochemistry, California State University Long Beach, Long Beach, CA, USA
Department of Materials Chemistry, Faculty of Science and Technology, Ryukoku University, Otsu, Japan
Publication date: 03 October 2015