Accession Number : AD0714235

Title :   Excitation at Electrodes.

Descriptive Note : Quarterly status rept. no. 1,

Corporate Author : GENERAL TELEPHONE AND ELECTRONICS LABS INC BAYSIDE N Y BAYSIDE RESEARCH CENTER

Personal Author(s) : Heller,Adam ; French,Kenneth W.

Report Date : 07 NOV 1970

Pagination or Media Count : 4

Abstract : Briefly reviewed is research concerned in the demonstration that ions can be produced in the electronically excited rather than in the ground state in electrode reactions. Electroluminescence has been observed in all of the three cations (Th(3+), Eu(3+), and Nd(3+) that have been tried so far. Upon passage of current between electrodes immersed in aprotic solvent solutions of the ions, the terbium-containing solutions emit green light, europium containing solutions emit red, and neodymium containing solutions, infrared. The observed electroluminescence suggests that ions with relatively low-lying excited states are readily produced in the excited state in electrode reactions. The new liquid electroluminescent systems are solutions of rare-earth ions in phosphorus oxychloride acidified with a Lewis acid zirconium tetrachloride. A solution was prepared by adding Tb(CF3COO)3 (or another rare-earth trifluoroacetate) to a solution of zirconium tetrachloride in phosphorus oxychloride. A reaction takes place in which CF3COOl is liberated and the Nd(+3) remains in solution. (Author)

Descriptors :   (*ELECTROLUMINESCENCE, *RARE EARTH COMPOUNDS), ELECTROCHEMISTRY, CHELATE COMPOUNDS, TERBIUM COMPOUNDS, EUROPIUM COMPOUNDS, NEODYMIUM COMPOUNDS, SOLVENTS, OXYCHLORIDES, PHOSPHORUS COMPOUNDS, HALOGENATED HYDROCARBONS

Subject Categories : Inorganic Chemistry
      Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE