Experimental observations from (sub‐)micrometer spheres of silica are compared with the results from conventional MCM‐41 material. SEM images give proof of a spherical morphology (see Figure), which is also confirmed by TEM. XRD patterns confirm that on a local scale the pores are hexagonally packed whilst on a larger scale, the pore ordering is disturbed.

Siliceous MCM-41 and MCM-48, covalently linked with the chiral selector (R)-naphthylethylamine, have been evaluated as supports in chiral HPLC and show for several racemates higher separation factors than for a stationary phase based on amorphous silica.

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