... Please enable JavaScript to use all the features on this page. Polyhedron. Volume 52, 22 March 2013, Pages 634–638. ... 2.2. Catalyst preparation and characterization. 2.2.1. Synthesis of amino-propyl-modified silica [NH 2 (CH 2 ) 3 SiO 3/2 ] p ·ySiO 2. ...