(* october 18th 1799; + august 29th 1868) was a German-Swiss chemist who is best known for inventing the fuel cell (1838) and his discoveries of guncotton and ozone. Life Schönbein was born in Metzingen, in the south of Germany. At age13 he was apprenticed to a chemical and pharmaceutical firm at Böblingen. Through his own efforts, he acquired sufficient scientific skills and knowledge to receive an examination by the professor of chemistry at Tübingen.

Schönbein passed the exam and, after a series of moves and university studies, he managed to acquire a position at the University of Basel in 1828, becoming a full professor in 1835. He remained there until his death in 1868, and was buried in Basel. Ozone It was while doing experiments on the electrolysis of water at the University of Basel that Schönbein first began to notice a distinctive odor in his laboratory. This smell served him as first hints to the presence of a new product from his experiments. Because of the pronounced smell, Schönbein determined the term ‘ozone’ for the new gas, deriving from the Greek word ‘ozein’, which means ‘to smell’. Schönbein described his discoveries in publications in 1840.

He later found that the smell of ozone was similar to that produced by the slow oxidation of white phosphorus. The ozone smell Schönbein detected is the same as that occurring in the vicinity of a thunderstorm, an odor that indicates the presence of ozone in the atmosphere. Explosives Despite his wife´s disapproval, Schönbein occasionally experimented in their kitchen. One day in 1845, when his wife was away, he spilled a mixture of nitric acid and sulfuric acid. After using his wife's cotton apron to mop it up, he hung the apron over the stove to dry, only to find that the cloth spontaneously ignited and burned so quickly that it seemed to disappear. Schönbein, in fact, had converted the cellulose of the apron, with the nitro groups (added from the nitric acid) serving as an internal source of oxygen; when heated, the cellulose was completely and suddenly oxidized. Schönbein recognized the possibilities of the new compound. Ordinary black gunpowder, which had reigned supreme in the battlefield for the past 500 years, exploded into thick smoke, blackening the gunners, fouling the cannon and small arms, and obscuring the battlefield. Nitrocellulose was a possible "smokeless powder", and from its potential as a propellant for artillery shells, it received the name guncotton.

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