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An inclusion complex of β-cyclodextrin with mnt anion (mnt = maleonitriledithiolate) studied by induced circular dichroism

  • Zhenda Lu
  • Changsheng Lu
  • Qingjin Meng
Original Article

Abstract

A new inclusion complex of β-cyclodextrin with sodium maleonitriledithiolate (Na2mnt) was investigated by electronic spectra, induced circular dichroism (ICD), and quantum mechanics (QM) methods. The orientation of the guest anion inside the host cavity was studied by ICD spectra and analyzed by structural optimization using PM3 quantum chemical method. Finally, the inclusion constant was determined by both a linear and a non-linear fitting methods, which were based on the variation of ICD signals of the guest upon inclusion complexation with the host. The inclusion constant of Na2mnt/β-cyclodextrin was estimated to be (2.45 ± 0.15) × 103 or (3.10 ± 0.11) × 103 M−1 in solution by these two fitting methods.

Keywords

β-Cyclodextrin Inclusion complex Maleonitriledithiolate Induced circular dichroism Inclusion constant PM3 

Notes

Acknowledgements

This work was supported by the National Natural Science Foundation (No. 20490218) and the Nanjing University Talent Development Foundation.

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Copyright information

© Springer Science+Business Media B.V. 2007

Authors and Affiliations

  1. 1.State Key Laboratory of Coordination Chemistry, Coordination Chemistry InstituteNanjing UniversityNanjingP.R. China

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