Figure 3 (image) Kanazawa University Caption (a) Host-guest system in which guest exchange is initiated by exchange of anion caps. (b) Time course of the guest exchange efficiency. (i) When TfO- is used as a counteranion, the guest exchange is very slow. (ii) & (iii) Addition of acetate ion (AcO-) significantly accelerates the guest exchange. Credit Kanazawa University Usage Restrictions The image may only be used with appropriate caption and credit. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.