Temperature deactivation of excited Tb3+ in the presence of 1,2-dioxetane in acetonitrile
Physical Chemistry
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Abstract
Quenching the fluorescence (FL) of terbium perchlorate by 2,2′-adamantane-2,2′-dioxide (1) was shown to have a chemical character and was caused by the formation of the [1...Tb3+] complex. The dependence of the lifetime (τ) of FL of Tb*3+ in acetonitrile on the temperature and concentration of1 has been studied. The temperature dependence of τ is caused by a rearrangement of the inner sphere of the aquasolvate complexes of Tb3+, which leads to the replacement of H2O with MeCN and1. The energy of replacing the H2O molecule in the inner sphere of complexes with a solvent molecule has been calculated.
Key words
chemiluminescence fluorescence Tb(ClO4)3·6H2O, 2,2′-adamantane-2,2′-dioxide lifetime quenchingPreview
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