George Claude Pimentel chemical laser inventor

George Claude Pimentel – inventor of chemical laser

Category : Personalities
Published by : Data Research Analyst, Worldofchemicals.com

Biography & Contributions

George Claude Pimentel was born on May 02, 1922 – died on June 18, 1989.

Pimentel got many awards and medals include Wolf Prize in Chemistry in the year of 1982, National Medal of Science and Franklin Medal in the year of 1985, Welch Award in the year of 1986, Priestley Medal in the year of 1989.

Pimentel was the inventor of the chemical laser. He developed modern technique of matrix isolation in low-temperature chemistry. Pimentel proposed the three-centre four-electron bond.

Chemical Laser chemical laser is a laser that obtains its energy from a chemical reaction. Chemical lasers can reach continuous wave output with power reaching to megawatt levels. They are used in industry for cutting and drilling.

Example

Chemical oxygen iodine laser

All gas-phase iodine laser

Chemical Oxygen Iodine Laser

Chemical oxygen iodine laser is an infrared chemical laser. As the beam is infrared, it cannot be seen with the naked eye. It is capable of output power scaling up to megawatts in continuous mode. Its output wavelength is 1.315 µm, a transition wavelength of atomic iodine. The laser is fed with gaseous chlorine, molecular iodine, and an aqueous mixture of hydrogen peroxide and potassium hydroxide. The aqueous peroxide solution undergoes chemical reaction with chlorine, producing heat, potassium chloride, and oxygen in excited state, singlet delta oxygen.

Hypervalent Molecule

Hypervalent molecule is a molecule that contains one or more main group elements formally bearing more than eight electrons in their valence shells. Phosphorus pentachloride (PCl5), sulfur hexafluoride (SF6), chlorine trifluoride (ClF3), and the triiodide (I3−) ion are examples of hypervalent molecules. Hypervalent molecules were first formally defined by Jeremy I. Musher in 1969 as molecules having central atoms of group 15-18 in any oxidation state other than the lowest.

Three-center four-electron bond

Three-center four-electron bond is a model used to explain bonding in certain hypervalent molecules such as tetratomic and hexatomic interhalogen compounds, sulfur tetrafluoride, the xenon fluorides, and the bifluoride ion. It is also known as the Pimentel-Rundle three-center model.

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