Molecules are the smallest units that we can handle. Chemists have obligation as well as pleasure to design and produce molecules showing various functions. In particular, the organic synthetic chemistry in 20th century produced so many organic products such as polymers, drugs, liquid crystals, fuels, and so on.

Molecules are the smallest units that we can handle. Chemists have obligation as well as pleasure to design and produce molecules showing various functions. In particular, the organic synthetic chemistry in 20th century produced so many organic products such as polymers, drugs, liquid crystals, fuels, and so on.