02004nas a2200217   4500008004100000022001400041245010200055210006900157260009800226300001200324490000700336520117300343653004001516653001701556653001101573653002301584653000801607100001901615700002501634856012701659       2006                        eng d  a0959-810300aSilica-supported bis(imino)pyridyl iron(II) catalyst: nature of the support-catalyst interactions0 aSilicasupported bisiminopyridyl ironII catalyst nature of the su  aTHE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLANDbJOHN WILEY & SONS LTDcAUG  a854-8610 v553 a<p>Ethylene polymerizations were performed using silica-supported 2,6-bis[1-(2,6-diisopropylphenylimino) ethyl] pyridine iron(II) dichloride with methylaluminoxane (MAO) as co-catalyst. Silica was calcined at 600, 400 and 200 degrees C under vacuum for 8 h. The effect of calcination temperature of silica on the polymerization activity and the properties of the polymers obtained were examined. Catalyst-support interactions were examined by both a chemical method and XPS. It was observed that upon supporting the catalyst on the surface of silica, there is an increase in the binding energy of the metal center. However, no change in the metal binding energy was observed on supporting the catalyst to silica calcined at different temperatures. Ethylene polymerizations were performed using MAO as co-catalyst. Catalysts were also prepared by first pretreating silica with NIAO, followed by addition of the Fe(II) catalyst and contacting a complex of Fe(II) catalyst-MAO with silica previously calcined at 400 degrees C for 8 h. The results indicate that there is no chemical bonding between the support and the catalyst. (C). 2006 Society of Chemical Industry.</p>10abis(imino) pyridyl iron(II) complex10aPolyethylene10asilica10asupported catalyst10aXPS1 aRay, Saptarshi1 aSivaram, Swaminathan  uhttps://library.ncl.res.in/content/silica-supported-bisiminopyridyl-ironii-catalyst-nature-support-catalyst-interactions-1