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A density functional study towards substituent effects on anion sensing with urea receptors

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Abstract

Effects of substituents on anion binding in different urea based receptors have been examined using density functional (B3LYP/6-311+G**) level of theory. The complexes formed by a variety of substituted urea with a halide anion (fluoride) and an oxy-anion (acetate) have been calculated. The stronger complexes were predicted for receptors with fluoride ion than that of acetate ion, however, in water the preference was found to be reversed. The pK a calculations showed the preferred sites of deprotonation for positional isomers, while interacting with anions. The position of the substituent in the receptor, however, could change the preferred sites of deprotonation compared to the site predicted with pK a values.

The substituent effects on anion binding towards different urea receptors have been examined by DFT with B3LYP/6-311+G** level of theory.

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Acknowledgments

Authors thank the Department of Science and Technology, Board of Radiation and Nuclear Sciences of Department of Atomic Energy and Council of Scientific and Industrial Research, India for financial support. AG wishes to thank the Council of Scientific and Industrial Research, for a Senior Research Fellowship. AD and BG thank Dr. P. K. Ghosh for his keen interest in the work. We thank the reviewers for their suggestions to improve the paper.

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  1. Central Salt and Marine Chemicals Research Institute (CSIR), Bhavnagar, 364002, Gujarat, India

    Amrita Ghosh, D. Amilan Jose, Amitava Das & Bishwajit Ganguly

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  1. Amrita Ghosh
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Correspondence to Amitava Das or Bishwajit Ganguly.

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Ghosh, A., Jose, D.A., Das, A. et al. A density functional study towards substituent effects on anion sensing with urea receptors. J Mol Model 16, 1441–1448 (2010). https://doi.org/10.1007/s00894-010-0663-2

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