Robert Boyle was an important guy in the 17th C and he is considered one of the founders of modern chemistry. He was responsible for making chemistry a respected science. Because of him, it became a real science not a study of alchemy and mysticism. He introduced the idea of careful measurements and repeated experiments.
John Polanyi, still living and working at the University of Toronto won the Nobel Prize in Chemistry for his work in chemical kinetics. This Berlin born scientist is still an active contributor to the academic world at the age of 91.