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Photochemistry and Structure of Metal Amine Solutions
Author(s) -
Gaathon A.,
Ottolenghi M.
Publication year - 1970
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1002/ijch.197000023
Subject(s) - chemistry , alkali metal , solvated electron , amine gas treating , photochemistry , ion , metal , amide , inorganic chemistry , metal ions in aqueous solution , electron , radiolysis , organic chemistry , aqueous solution , physics , quantum mechanics
The photochemistry of the 670 nm band in fluid sodium amine solutions is investigated by applying flash (optical detection) or steady state (ESR detection) irradiation techniques. The photoregeneration of faded alkali metal solutions induced by exciting the amide decomposition product, is also submitted to flash investigation. In both cases the primary act appears to be the generation of solvated electrons. The available photochemical data are examined in light of a recent spectroscopic study which attributes the 670 nm band to a sodium anion (Na − ) and the 850, 920 and 1030 metal bands to K − . Rb − and Cs − , respectively. It is concluded that the photochemical observations provide new evidence for the model involving the alkali metals negative ions. Electron photoejection in a rigid amine glass at −196°C produces a (IR) band which is red shifted relative to that present in an equilibrium liquid solution, frozen to the same low temperature glass. The effect is attributed to two, physically distinguishable, solvated electrons in glasses or, alternatively, to an additional (unidentified) IR species present in the dark equilibrium solutions.