Ester hydrolysis by a cyclodextrin dimer catalyst with a metallophenanthroline linking group.

@article{Zhou2008EsterHB,
  title={Ester hydrolysis by a cyclodextrin dimer catalyst with a metallophenanthroline linking group.},
  author={Yingxue Zhou and Meng-Meng Zhao and Zong‐Wan Mao and Liang-nian Ji},
  journal={Chemistry},
  year={2008},
  volume={14 24},
  pages={
          7193-201
        }
}
A novel beta-cyclodextrin dimer, 1,10-phenanthroline-2,9-dimethyl-bridged-bis(6-monoammonio-beta-cyclodextrin) (phenBisCD, L), was synthesized. Its zinc complex (ZnL) has been prepared, characterized, and applied as a new catalyst for diester hydrolysis. The formation constant (logK(ML)=9.56+/-0.01) of the complex and deprotonation constant (pK(a)=8.18+/-0.04) of the coordinated water molecule were determined by a potentiometric pH titration at (298+/-0.1) K. Hydrolytic kinetics of carboxylic… 
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Ester hydrolysis by a cyclodextrin dimer catalyst with a tridentate N,N',N''-zinc linking group.
TLDR
The zinc complex (ZnL) is prepared, characterized, and applied as a catalyst for diester hydrolysis, showing that ZnL has a very high rate of catalysis for BNPC hydrolyses, yielding an 8.98x10(3)-fold rate enhancement over uncatalyzed Hydrolysis at pH 7.00.
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Two N-donor ligands derived from a β-cyclodextrin (βCD) monomer and dimer were employed to mediate the hydrolytic activity and stability of the Ce(IV) ion in aqueous solution, which highlighted the hydrophobicity effect of βCDs.
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