Abstract
The reaction of various alkyltin compounds [HSnBu3 and SnR4, R=Me, Et, cyclohexyl (Cy)] with cloverite dehydroxylated at 450°C was studied by various methods such as 1H, 31P and 119Sn MAS NMR, 13C CP-MAS NMR, infrared spectroscopy, analysis of evolved gases, thermolysis and chemical analysis. All techniques showed that there was a formation of grafted –SnR3 fragments. However, depending on the size of the organometallic fragment, the grafting reaction did not occur in the same manner: while –SnR3 (R=Me, Et, n-Bu) fragments were grafted homogeneously over the entire crystal volume, –SnCy3 fragments were grafted only on the external surface, as previously observed on mordenite. In addition, depending on the size of the R alkyl group, different grafted complex loadings were achieved: for R=Me, up to four –SnMe3 could be grafted per window aperture, while for R=Et and n-Bu, only one complex could be grafted per window aperture.