Chiral dynamical matrix

At a fundamental level, it has been shown that PECD stems from interference between electric dipole operator matrix elements of adjacent continuum f values, and that consequently the chiral parameters depend on the sine rather than the cosine of the relative scattering phases. Generally, this provides a unique probe of the photoionization dynamics in chiral species. More than that, this sine dependence invests the hj parameter with a greatly enhanced response to small changes in scattering phase, and it is believed that this accounts for an extraordinary sensitivity to small conformational changes, or indeed to molecular substitutions, that have only a minimal impact on the other photoionization parameters. 

Cyclodextrin derivatives have been successfully used also for enantioseparations in packed capillary CEC. In this technique CyDs are used covalently immobilized to silica gel [69], to particulate silica sintered as a monolith [70], or to a monolithic organic matrix [71, 72]. In addition, CyDs have been used as dynamic modifiers of the stationary phase [73], as well as chiral mobile phase additives in combination with an achiral stationary phase [74, 75]. 

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