Aggregation-induced hydrogen bonding

Fig. 13 Aggregation-induced hydrogen bonding enhancement of HFIP...

J. Pei, X.-L. Liu, Z.-K. Chen, X.-H. Zhang, Y.-H. Lai, and W. Huang, First hydrogen-bonding-induced self-assembled aggregates of a polyfluorene derivatives, Macromolecules, 36 323-327, 2003. 

Solutes that, whatever their state of aggregation, undergo solvation interactions with the solvent beyond those due to dispersion forces, exhibit specific contributions to the solubility, that can be attributed to dipole-dipole and dipole-induced dipole interactions and electron-pair or hydrogen-bond donation by the solvent to the solute or vice versa. 

Solutes that, whatever their state of aggregation, undergo solvation interactions with the solvent beyond those due to dispersion forces, exhibit specific contributions to the solubility, that can be attributed to dipole-dipole and dipole-induced dipole interactions and electron-pair or hydrogen bond donation by the solvent to the solute or vice versa. Equations (2.10), (2.14) and (2.15) must then be modified to take these interactions into account by the addition of appropriate terms. Various approaches have been proposed for such additional interactions, and here the following is adopted, following Yalkowski (Yalkowski 1988) ... 

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