Selective surface adsorption versus imprinting in amorphous microporous silicas

摘要: Abstract Selective adsorption of organic molecules on inorganic solids is an attractive property materials. It was attempted to control molecular surfaces by the preparation porous silicas through a sol–gel process developed for generation selective sites imprinting. The materials were prepared co-polycondensation tetraethyl orthosilicate with R–Si(OR)3, R as removable template. In competitive experiments such imprinted oxides mixtures (−)-borneol, (−)-camphor and (+)-fenchol, individual components has been observed. Detailed experiments, however, confirmed that selectivity independent comonomer used in process, but dependent method preparation. Adsorption selectivities are found be specific pore created different procedures. No evidence presence cavities due imprint effects.