Immobilization of Homogeneous Palladium(II) Complex Catalysts on Novel Polysiloxanes with Controllable Solubility: Important Implications for the Study of Heterogeneous Catalysis on Silica Surfaces This work was supported in part by the National Science Council of Taiwan. The authors are grateful to the NSC South Precision Instrument Center at National Cheng Kung University for performing the solution (29)Si NMR experiments.