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Information × Registration Number 0205U004345, 0104U008435 , R & D reports Title Development of new radiochrome materials for to be used as visual radioactivity indicators popup.stage_title Head Chebanov V.A., Registration Date 21-03-2005 Organization Scientific-research department of alkali halide crystals with experimental manufacture STC "Institute for single crystals" NAS of Ukraine popup.description2 We studied interaction of о-phenylenediamine derivatives with chalcondibromides resulting in 1,2- diaryl -1,1a- dihydroazyrino [1,2-a] quinoxalinesalinam formation. It was shown that reaction of asymmetric 4- methyl -1,2- phenylenediamine was not regioselective one and it led to 5- and 6-methyl substituted dihydroazyrino[1,2-a]-quinoxaline admixture isolation. We discovered that the received compounds possessed not only photo- but also thermochromic properties - at temperatures higher than 70 0C and their toluene solutions acquired dark-blue coloring that disappear at cooling.5635 Product Description popup.authors popup.nrat_date 2020-04-02 Close