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Effect of an External Electric Field on the Decay Constant of 99 Tc m in Halogen Complexes
Author(s) -
Leuenberger H.,
Huber P.,
Nyikos P.,
Kobel H. R.,
Seiler H.
Publication year - 1972
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19720550322
Subject(s) - chemistry , electric field , dielectric , halogen , field (mathematics) , constant (computer programming) , ligand field theory , capacitor , ligand (biochemistry) , molecule , atomic physics , field strength , analytical chemistry (journal) , crystallography , ion , physics , voltage , optoelectronics , quantum mechanics , magnetic field , organic chemistry , computer science , pure mathematics , programming language , biochemistry , alkyl , mathematics , receptor
A positive change Δλ/λ of the decay constant of 99 Tc m has been observed on the application of an external electric field in K 2 TcX 6 (X = F, Cl, Br, I). For its investigation the Tc‐complexes were embedded as small conglomerates or more or less as isolated single molecules in a powder of high dielectric constant, which was then compressed into a thin layer of about 0.2 mm and inserted between two capacitor plates. The change Δλ/λ depends on the strength of the chemical bond of 99 Tc m . As a first approximation Δλ/λ was assumed to be linearly dependent upon the electric field. The experimental results with an external field of 10 4 V/cm are:A relationship between Δλ/λ and the electro‐negativities of the ligand atoms could be established. Difficulties encountered in the theoretical calculation of Δλ/λ are discussed.
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