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Issue 46, 2017
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A ruthenium tetrazole complex-based high efficiency near infrared light electrochemical cell

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Abstract

We report on the exploitation of a new tetrazole-substituted 1,10-phenanthroline and a 2,2′-bipyridine (bpy) ancillary ligand modified with an electron-donating group in cationic ruthenium complexes. This complex, placed in between two electrodes without any polymer, demonstrates high efficiency near-infrared (NIR) electroluminescence (EL). The comparison between bpy and its methyl-substituted ancillary ligand shows that the cationic Ru tetrazolate complex containing methyl groups exhibits a red shift in the EL wavelength from 620 to 800 nm compared to [Ru(bpy)3]2+ and an almost twofold reduction in the turn-on voltage, i.e., from 5 to 3 V, with respect to 5-tetrazole-1,10-phenanthroline. An external quantum efficiency of 0.95% for the dimethyl derivative is demonstrated, which is a remarkable result for non-doped NIR light electrochemical cells based on ruthenium polypyridyl.

Graphical abstract: A ruthenium tetrazole complex-based high efficiency near infrared light electrochemical cell

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Publication details

The article was received on 17 Apr 2017, accepted on 10 May 2017 and first published on 10 May 2017


Article type: Communication
DOI: 10.1039/C7CC02878D
Citation: Chem. Commun., 2017,53, 6211-6214
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    A ruthenium tetrazole complex-based high efficiency near infrared light electrochemical cell

    H. Shahroosvand, S. Abaspour, B. Pashaei, E. Radicchi, F. De Angelis and F. Bonaccorso, Chem. Commun., 2017, 53, 6211
    DOI: 10.1039/C7CC02878D

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