Luminescence of a New Ru(II) Polypyridine Complex Controlled by a Redox-Responsive Protonable Anthra[1,10]phenanthrolinequinone

[img]PDF - Authorized users only
Language: English
451Kb
Title:Luminescence of a New Ru(II) Polypyridine Complex Controlled by a Redox-Responsive Protonable Anthra[1,10]phenanthrolinequinone
Creators:
Hartl, František
Vernier, Sandrine
Belser, Peter
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 70, 11, pp. 1891-1908
Uncontrolled Keywords:Bipyridines, Electron transfer, Polypyridine complexes, Phenanthrolines, Redox switch, Electrochemistry, Ruthenium, Luminescence quenching, Anthraquinone, Cyclic voltammetry, UV-VIS spectroscopy

Abstract

Redox-controlled luminescence quenching is presented for a new Ru(II)-bipyridine complex [Ru(bpy)<sub>2</sub>(<strong>1</strong>)]<sup>2+</sup> where ligand <strong>1</strong> is an anthra[1,10]phenanthrolinequinone. The complex emits from a short-lived metal-to-ligand charge transfer, <sup>3</sup>MLCT state (τ = 5.5 ns in deaerated acetonitrile) with a low luminescence quantum yield (5 × 10<sup>-4</sup>). The emission intensity becomes significantly enhanced when the switchable anthraquinone unit is reduced to corresponding hydroquinone. On the contrary, chemical one-electron reduction of the anthraquinone moiety to semiquinone in aprotic tetrahydrofuran results in total quenching of the emission. <p>

Title:Luminescence of a New Ru(II) Polypyridine Complex Controlled by a Redox-Responsive Protonable Anthra[1,10]phenanthrolinequinone
Creators:
Hartl, František
Vernier, Sandrine
Belser, Peter
Uncontrolled Keywords:Bipyridines, Electron transfer, Polypyridine complexes, Phenanthrolines, Redox switch, Electrochemistry, Ruthenium, Luminescence quenching, Anthraquinone, Cyclic voltammetry, UV-VIS spectroscopy
Divisions:Life and Chemical Sciences > Institute of Organic Chemistry and Biochemistry > Collection of Czechoslovak Chemical Communications
Journal or Publication Title:Collection of Czechoslovak Chemical Communications
Volume:70
Number:11
Page Range:pp. 1891-1908
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc20051891UNSPECIFIED
ID Code:2446
Item Type:Article
Deposited On:06 Feb 2009 17:18
Last Modified:06 Feb 2009 16:18

Citation

Hartl, František; Vernier, Sandrine; Belser, Peter (2005) Luminescence of a New Ru(II) Polypyridine Complex Controlled by a Redox-Responsive Protonable Anthra[1,10]phenanthrolinequinone. Collection of Czechoslovak Chemical Communications, 70 (11). pp. 1891-1908. ISSN 0010-0765

Repository Staff Only: item control page