Structures and properties of solvated and unsolvated isopropyl functionalised calixarenes
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The tetra-iso-propyl ethers of calixarene and p-t-butylcalixarene have been isolated in the cone conformation, and structurally characterized as chloroform solvates. Thermogravimetric analysis demonstrated that the parent iso-propylcalixarene solvate is significantly more stable than the p-t-butylcalixarene analogue, retaining the solvent up to a temperature of of 125 °C. It was found that the calixarene ether sublimes at atmospheric pressure, and solvent-free crystals appropriate for structure determination were produced at reduced pressure. The p-t-butylcalixarene ether was also isolated without solvent in the lattice, but in this case the calixarene was crystallized from acetone, as sublimation did not produce crystals of sufficient quality.
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Goh, Ching Yong (2012)A selection of amino acid functionalised calixarenes was studied. Acidic amino acid functionalised calixarenes were investigated as crystal growth modifiers. The self-assembly behaviour of proline functionalised ...
Ogden, Mark; Raston, C.; Radomirovic, Tomoko; Jones, Franca (2014)Calixarenes can be used as well-defined scaffolds for investigating structure–activity relationships of additives and their impact on crystallization. In this work, we present the crystal growth modification of barium ...
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