Complexation with diol host compounds. Part 24. Kinetics of desolvation of inclusion compounds of 2,7-substituted 2,2′-bis(9-hydroxy-9-fluorenyl)biphenyl hosts with acetone

Abstract

The structures of the acetone inclusion compounds of 2,2′-bis(2,7-dichloro-9-hydroxy-9-fluorenyl)biphenyl (compound 1) and 2,2′-bis(2,7-di-tert-butyl-9-hydroxy-9-fluorenyl)biphenyl (compound 2), with host∶guest ratios of 1∶2 and 1∶1, respectively, have been elucidated. Compound 2 desolvates at 175 °C, whereas compound 1 is much less stable and desolvates at 80 °C. Compound 1 desolvates in a single deceleratory step following a three dimensional diffusion kinetic model. The desolvation of compound 2 follows the first-order kinetic model. The activation energies of desolvation have been evaluated.