Influence of CO-Attached Aromatics on the Thermolysis of Surface-Immobilized 1,3-Diphenylpropane.

摘要

The technique of model compound immobilization by covalent surface attachment is being employed to investigate the potential impact of restricted diffusional mobility on the thermal reactivity of coal. This restricted mobility may be imposed in coal as a consequence of its cross-linked, macromolecular structure. Thermolysis studies at 345--400(degree)C of model coal structures covalently attached to a silica surface have shown that significant perturbations in free-radical reaction mechanisms can occur, and result in altered reaction rates and product distributions compared with corresponding fluid phase behavior. In the current study, we are beginning to probe the influence of the structure of co-attached aromatic molecules such as biphenyl and diphenylmethane on the reaction rate and regioselectivity in the thermolysis of surface-attached 1,3-diphenylpropane. 6 refs., 1 tab.