Synthesis, characterization and catalytic activity of acid–base bifunctional materials through protection of amino groups
作者:Yanqiu Shao、Heng Liu、Xiaofang Yu、Jingqi Guan、Qiubin Kan
DOI:10.1016/j.materresbull.2011.12.001
日期:2012.3
3}H-SBA-15-NHsub 2} catalyst containing amine and sulfonic acid groups exhibited excellent acid-basic properties. -- Abstract: Acid-base bifunctional mesoporous material SOsub 3}H-SBA-15-NHsub 2} was successfully synthesized under low acidic medium through protection of amino groups. X-ray diffraction (XRD), Nsub 2} adsorption-desorption, transmission electron micrographs (TEM), back titration, sup 13}C magic-angle
Novel tert-alkyl carbamate silicon compounds are provided which are useful as coupling agents. The compounds have the formulas: ##STR1## wherein the R groups can represent various hydrocarbon and other groups, n has a value of 1 to 10, b has a valueof from 2 to 5 and a has a value of 1, 2 or 3. Processes are also provided for the preparation of the carbamate compounds and their use as coupling agents.