Electrides: Ionic Salts with Electrons as the Anions
- 9 February 1990
- journal article
- research article
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 247 (4943) , 663-668
- https://doi.org/10.1126/science.247.4943.663
Abstract
Electrides are ionic compounds that have alkali metal cations complexed by a crown ether or cryptand, with trapped electrons as counterions. The crystal structures and properties of two electrides illustrate the diversity that is encountered. One, Cs + (18-crown-6) z e - , has relatively isolated, trapped electrons apparently centered at each anionic site. It has a low conductivity consistent with electron localization, with an activation energy for conductivity of at least 0.45 electron volt. The other, K + (cryptand[2.2.2])e - , has electron pairs trapped in an elongated cavity in a singlet ground state, but there is also a thermally accessible paramagnetic state available. This electride is much more conducting, with an activation energy of only 0.02 electron volt.Keywords
This publication has 52 references indexed in Scilit:
- Low-temperature photoluminescence of Na+(cryptand[2.2.2])Na- excited with a picosecond laserJournal of the American Chemical Society, 1989
- Crystal structures and properties of two sodides and an electrideInorganic Chemistry, 1989
- Synthesis and structures of two thermally stable sodides with the macrocyclic complexant hexamethyl hexacyclenJournal of the American Chemical Society, 1989
- First observation by potassium-39 NMR of K- in solution and in crystalline potassidesJournal of the American Chemical Society, 1985
- Reductive removal of sulfonyl groups: Cleavage of sulfonamides and sulfonates by alkali metal combined with crown ether.CHEMICAL & PHARMACEUTICAL BULLETIN, 1982
- Aromatic radical anions in neat solvents. Crown complex ion-pair formationJournal of the American Chemical Society, 1975
- 23Na NMR spectrum of the sodium anionThe Journal of Chemical Physics, 1974
- Cyclic polyethers and their complexes with metal saltsJournal of the American Chemical Society, 1967
- Cyclic polyethers and their complexes with metal saltsJournal of the American Chemical Society, 1967
- Absorption Spectrum of the Hydrated Electron in Water and in Aqueous SolutionsJournal of the American Chemical Society, 1962