Abstract
AbstractIntense blue emissions were obtained by the interaction between protonated pyridine rings and the adjacent anion or adjacent PF6−. These compounds possess hydrogen bonds, which restrain the nonradiative decay to produce strong emission. By reacting of (L=terpy, tterpy and Clterpy) with a variety of acid (HF, HCl, HBr, H2SO4 and H3PO4) in water, triprotonated and diprotonated compounds [LH3]3+ and [LH2]2+were prepared. Abbreviations used are terpy=2,2’:6’,2’’‐terpyridine, tterpy=4’‐(4‐tolyl)‐2,2’:6’,2’’‐terpyridine and Clterpy=4’‐Chloro‐2,2’:6’,2’’‐terpyridine. Intense emission in acetonitrile (Φ = 0.30) was obtained by attaching two protons to the nitrogen in [(tterpyH2)H2O]2+ and intermolecular hydrogen bonds to the two adjacent F− atoms in PF6−.
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