Chemists

Osamu Sato

Osamu Sato (佐藤治) is a Japanese materials and coordination chemist, a professor at Kyushu University known for photomagnetism, spin crossover, and dynamic molecular crystals, and for his 1996 Science paper on photoinduced magnetization.

Osamu Terasaki

Osamu Terasaki is a Japanese electron crystallographer known for solving the atomic structures of zeolites, mesoporous materials, and metal-organic frameworks by electron microscopy, with careers at Tohoku and Stockholm universities.

Oscar K. Rice

Oscar Knefler Rice (1903–1978) was an American physical chemist at the University of North Carolina, elected to the National Academy of Sciences in 1964, known for unimolecular reaction theory.

Oscar Loew

Oscar Loew (1844–1941) was a German agricultural chemist who announced catalase in 1900, discovered manganese as a plant nutrient, and taught in Tokyo and Munich.

Oskar Wintersteiner

Oskar Wintersteiner (1898–1971) was an Austrian-American biochemist who first crystallized penicillin and showed it contained sulfur, and who isolated progesterone and helped isolate cortisone at Squibb.

Ossian Aschan

Adolf Ossian Aschan (1860–1939) was a Finnish organic chemist and politician, professor of chemistry at the University of Helsinki from 1908 to 1927 and a member of Parliament in 1910–1911.

Otto Diels

Otto Paul Hermann Diels (1876–1954) was a German organic chemist at Kiel University who shared the 1950 Nobel Prize in Chemistry with Kurt Alder for the diene synthesis.

Otto Fischer (German chemist)

Otto Fischer (Otto Philipp Fischer) was a German chemist who held the chemistry chair at the University of Erlangen from 1885 to 1925 and worked on organic dyestuffs.

Otto Folin

Otto Folin, full name Otto Knut Olof Folin, was a Swedish-born American biochemist at Harvard Medical School who pioneered quantitative clinical chemistry and the Folin–Wu blood analysis system.

Sep 17, 2026

Otto Hahn

Otto Hahn was a German radiochemist who, with Fritz Strassmann, discovered nuclear fission in 1938, winning the 1944 Nobel Prize in Chemistry and later campaigning against nuclear weapons.

Otto Hönigschmid

Otto Hönigschmid was an Austrian-born chemist, the last classical atomic-weight analyst, who determined the atomic weights of nearly fifty elements and gave the first chemical proof of isotopes.

Otto Ruff

Otto Ruff (1871–1939) was a German inorganic chemist who became the leading authority on fluorine chemistry after Moissan's death, preparing new fluorides including uranium hexafluoride.

Otto S. Wolfbeis

Otto S. Wolfbeis (1947–2023) was an Austrian chemist who held the chair of Analytical and Interface Chemistry at the University of Regensburg and pioneered optical chemical sensors and biosensors.

Otto Schönherr

Otto Schönherr (1861–1926) was a German chemist at BASF in Ludwigshafen am Rhein, twice nominated for the Nobel Prize, known for the electric-arc oxidation of nitrogen to nitric acid.

Otto Wallach

Otto Wallach (1847–1931) was a German organic chemist who held the chemistry chair at Göttingen and won the 1910 Nobel Prize in Chemistry for his pioneer work on alicyclic compounds, founding terpene chemistry.

Ou Chen

Ou Chen (陈鸥) is a materials chemist and Professor of Chemistry at Brown University, known for building the first single-component quasicrystalline nanocrystal superlattice, reported in Science in 2018.

Ouyang Ziyuan

Ouyang Ziyuan (欧阳自远, born 1935) is a Chinese geochemist and cosmochemist, the first chief scientist of China's Chang'e lunar exploration program, known as the "Father of Chang'e".

Ove Christiansen

Ove Christiansen is a quantum chemist and full professor at Aarhus University, known for vibrational coupled cluster theory, the CC3 model, and the MidasCpp program package.

P. Andrew Evans

P. Andrew Evans is an organic chemist and professor at Queen's University whose research develops rhodium-catalyzed cross-coupling reactions and applies them to natural product synthesis.

P. Jeffrey Hay

P. Jeffrey Hay is a theoretical chemist at Los Alamos National Laboratory whose 1985 effective core potentials and basis sets became standard tools for quantum-chemical calculations on heavy elements.

P. Shiv Halasyamani

P. Shiv Halasyamani is an inorganic and materials chemist at the University of Houston, known for the 1998 review "Noncentrosymmetric Oxides" and for designing beryllium-free deep-ultraviolet nonlinear optical crystals.

Pablo G. Debenedetti

Pablo G. Debenedetti is an Argentine-born American chemical engineer at Princeton University, elected to the National Academy of Engineering in 2000 and known for the singularity-free theory of supercooled water.

Sep 17, 2026

Pamela M. Chu

Pamela M. Chu is an American analytical chemist at NIST in Gaithersburg, Maryland, known for quantitative infrared spectroscopy, trace-gas reference data, and coordinating NIST's carbon capture program since 2021.

Paolo Falcaro

Paolo Falcaro is an Italian materials chemist and professor at Graz University of Technology known for positioning metal–organic framework crystals and for MOF enzyme biocomposites.

Paolo Melchiorre

Paolo Melchiorre is an Italian organic chemist, professor at the University of Bologna since 2022, known for light-driven enantioselective organocatalysis and the 2021 RSC Pedler Award.

Paolo Samorì

Paolo Samorì (born 1971) is an Italian chemist working on supramolecular chemistry, organic electronics, and 2D materials, directing the Nanochemistry Laboratory at the Université de Strasbourg.

Partha Sarathi Mukherjee

Partha Sarathi Mukherjee, born 1973, is an Indian supramolecular coordination chemist at the Indian Institute of Science, Bangalore, known for Pd(II) and Pt(II) molecular cages and barrels used in catalysis.

Patrick Couvreur

Patrick Couvreur, born in 1950, is a pharmaceutical scientist and professor emeritus at Université Paris-Saclay known for inventing biodegradable drug-delivery nanoparticles and squalenoylation, and for winning the 2013 European Inventor Award.

Patrick J. Walsh

Patrick J. Walsh is an American organic chemist at the University of Pennsylvania, a professor there since 1999 known for 2-azaallyl anions that form carbon–carbon bonds without transition-metal catalysts.