TBAX

AcronymDefinition
TBAXTube Axial
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The addition of tetra-butylammonium salts (TBAX: X=F, Cl, [H.sub.2]P[O.sub.4], CN, AcO, and Cl[O.sub.4]) to solutions of compounds 1-4 in acetonitrile results in changes in both absorption and fluorescence spectra (Figures 4 and 5, Table 2).
Table 2: Changes in position ([[lambda].sup.fl.sub.max]) and fluorescence intensity ([I.sub.fl]) of compounds 1-4 (3 x [10.sup.-5] M) in acetonitrile upon addition of anions (in the form of TBAX salts) (1.0 x [10.sup.-4] M).