SYNTHESIS AND ACCEPTOR-DONOR CHARACTERISTICS OF ORDERED MESOPOROUS SILICAS

This research effort has been focused on the synthesis of ordered mesoporous silicas (MCMs) and the characterisation of the donor acceptor properties of them via the comparison of different methods for obtaining and refining results. The DN values denoting the donor number on the Gutmann scale and the AN* values denoting the acceptor number on the Riddle-Fowkes scale have been chosen in the estimation of the electron acceptor parameter (K)(A) and electron donor parameter (K)(D) values. The values of the parameters for different compositions of probes, having different acceptor donor properties, illustrate the need for establishing the accurate number of probes to introduce a new chromatographic test to supplement the Grob test. Complementary information has been obtained via X-ray photoelectron spectroscopy, energy dispersive X-ray spectroscopy and pH-metric tests.