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Abstract
A furfurylamine appended ditopic receptor (R1) for dicarboxylic acids has been designed and synthesised. The association constants (Ka) between receptors and dicarboxylic acids have been determined using UV–vis and NMR titration techniques. The binding constant (Ka) of succinic acid with R1 was observed maximum, which implies the optimum chain length selectivity for succinic acid. Theoretical calculation and molecular modelling using Gaussian 03 program also support the optimised receptor's cavity for succinic acid.
Acknowledgements
Swapan Dey thanks DST (Govt. of India) for awarding DST-Fast track project (SR/FT/CS-061/2009). Dibyendu Sain is also thankful to Indian School of Mines for providing fellowship. We also appreciate the help of Dr H. P. Nayek, Department of Applied Chemistry, ISM, Dhanbad for crystallographic analysis.
Supplementary Information
Experimental procedures, spectroscopic data, UV–vis titration spectra, NMR, MS and crystal structure associated with this article can be found in the online version. The crystallographic data for R1 have been deposited with the Cambridge Crystallographic Data Centre CCDC 866289.