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Probing Excimers of Pt(II) Compounds with Phenyl‐1,2,3‐Triazolyl and Pyridyl‐1,2,4‐Triazolyl Chelate Ligands by Means of Electrochemiluminescence
Author(s) -
Xiang Guiming,
Wang Xiang,
Li Michelle S. M.,
Lac Kevin,
Wang Suning,
Ding Zhifeng
Publication year - 2017
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201700059
Subject(s) - electrochemiluminescence , phosphorescence , chemistry , chemiluminescence , ammonium persulfate , photochemistry , chelation , persulfate , methylamine , excited state , ligand (biochemistry) , electrochemistry , fluorescence , inorganic chemistry , catalysis , organic chemistry , electrode , physics , quantum mechanics , nuclear physics , polymerization , polymer , biochemistry , receptor
Pt(II) complexes are well known for their excellent phosphorescence properties. Here, we report the results of an electrochemical and electrochemiluminescence (or electrogenerated chemiluminescence, ECL) study of two Pt complexes with phenyl‐1,2,3‐triazolyl and pyridyl‐1,2,4‐triazolyl chelate ligands to explore their effectiveness as ECL luminophores. The two Pt complexes with the two substituents CF 3 and t‐Bu on the pyridyl‐1,2,4‐triazolyl ligand (Pt1 and Pt2) were purposely chosen to see the structure and ECL correlations. It was discovered that excimers, the excited states of analyte dimers, contributed mainly to the ECL production. These two complexes exhibited weak ECL efficiencies following the annihilation mechanism. However, ECL was enhanced with co‐reactants such as tri‐ n ‐propylamine for Pt1 and ammonium persulfate for Pt2. Spooling ECL spectroscopy was utilized to gain analytical insight into light emission mechanisms. It is shown that excimers were probed easily by means of ECL.