Enhanced Electrochemiluminescence of A Macrocyclic Tetradentate Chelate Pt(II) Molecule through Its Collisional Interactions with the Electrode. Issue 20 (19th September 2022)

• Record Type: Journal Article
• Authors: He, Shuijian; Wang, Xiang; Xiang, Guiming; Lac, Kevin; Wang, Changshui; Wang, Suning; Ding, Zhifeng
• Is Part Of: Chemistry, an Asian journal. Volume 17:Issue 20(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-09-19
• Subjects: annihilation and coreactant pathways -- collisional interactions -- electrochemiluminescence -- pt complexes with macrocyclic ligands -- spooling ECL spectroscopy; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/asia.202200727
• Languages: English
• ISSNs: 1861-4728

Abstract

Abstract: A macrocyclic tetradentate chelate Pt(II) molecule (Pt1 ) served as an excellent luminophore in electrochemiluminescence (ECL) processes. The blue ECL of Pt1 /S2 O8 2− coreactant system in N, N'‐dimethylformamide was found to be 46 times higher than that of the Ru(bpy) 2+ /S2 O8 2− system or 30 times higher than that of the 9, 10‐diphenylanthracene/S2 O8 2− system. The unprecedented high ECL quantum efficiencies were caused by the cyclic generation of monomer excited states through collisional interactions of Pt1 molecules with the electrode at an elevated frequency. The ECL is tunable from bright blue to pure white by simply changing the solvent from N, N'‐dimethylformamide to dichloromethane. The white ECL of Pt(II) molecule was reported for the first time and the mechanism was proposed to be the simultaneous emissions from the monomer excited state (blue) and excimer (red). Abstract : A macrocyclic chelate Pt(II) complex give off unpresidented high ECL due to its collisions onto the electrode at a high frequency, which is tunable from bright blue to pure white by simply changing the solvent. It is the first complex luminophore that generate pure white ECL, due to the simultaneous emissions from the monomer excited state (blue) and excimer (red).