Luminescence quenching of cyclometalated Pt(II) complexes by halogenide ions |
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| Authors: | M S Khakhalina O A Rodionova M V Puzyk and K P Balashev |
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| Institution: | (1) Herzen State Pedagogical University, St. Petersburg, 191186, Russia |
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| Abstract: | The luminescence quenching of Pt(CΛN)En]ClO4 complexes ((CΛN)? = ppy?, tpy?, and bt? are deprotonated forms of 2-phenylpyridine, 2(2′-thienyl(pyridine), and 2-phenylbenzothiazole, respectively; En is ethylenediamine) by halogenide ions (Hal? = Cl?, Br?, I?) in ethanol solutions is studied. It is shown that the quenching has a dynamic character and its bimolecular rate constants are consistent with the enhancement of nonradiative deactivation of the excited state of {Pt(CΛN)En]*...Hal} collision complexes with increasing spin-orbit interaction constant of the halogen. |
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