However, the quantum yields dramatically change along the series passing from mono- to bis- and tris-chelate forms (7%, 2%, and <1% respectively), highlighting a decreasing trend as a function of the stoichiometry.
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Mono-, Bis-, and Tris-Chelate Zn(II) Complexes with Imidazo[1,5-<i>a</i>]pyridine: Luminescence and Structural Dependence.
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