The single most important figure of the Chemical Revolution of the 18th and early 19th centuries was the French chemist, Antoine Lavoisier. You should explore the biographical sketch of Lavoisier available from the University of Virginia--follow the links to other figures, such as Priestley and Cavendish.
Another important source, both for Lavoisier and for the history of chemistry in general is that of the Chemical Heritage Foundation. Begin with their Lavoisier page and check out some of the additional links they provide there.