A New Family of Ruthenium(II) Polypyridine Complexes Bearing 5-Aryltetrazolate Ligands as Systems for Electrochemiluminescent Devices

Citations Over TimeTop 17% of 2005 papers

Abstract

A new family of mono- and dinuclear ruthenium polypyridyl complexes containing 5-aryltetrazolate ligands such as the deprotonated form of 4-(1H-tetrazol-5-yl)benzonitrile (4-TBNH) and bis(1H-tetrazol-5-yl)benzene (BTBH(2)) have been synthesized and thoroughly characterized. The reactivity of the mononuclear species toward different electrophiles such as H(+) and CH(3)(+) has been investigated, and the effects of the resulting regioselective electrophilic attacks on the electronic and structural properties of the tetrazolate ligand have been studied by NMR ((1)H, (13)C) spectroscopy and X-ray crystal structures. Absorption and emission spectroscopy, together with an electrochemical and UV-vis-NIR spectroelectrochemical investigation of the uncoordinated ligand and complexes, has been performed, highlighting a rather good luminescence efficiency and a poor bridge-mediated electronic communication between the metal centers of the dinuclear complexes. The electrogenerated chemiluminescence (ECL) of the dinuclear species has been explored, and for one of these, an exceptionally high ECL efficiency has been observed, comparable to that of [Ru(bpy)(3)](2+), which is considered a standard in ECL studies.

Related Papers

• → Luminescent pH sensors based on di(2,2′-bipyridyl)(5,5′-diaminomethyl-2,2′-bipyridyl)-ruthenium(II) complexes(1992)72 cited
• → Photochemical and thermal ligand exchange in a ruthenium(ii) complex based on a scorpionate terpyridine ligand(2002)31 cited
• → The synthesis, structure and selected reactivity of a series of tricarbonyl ruthenium complexes with 1,3-dienes and heterodienes(1999)13 cited
• → Reactivity of cycloheptatrienyl tricarbonyl ferrate(−1: synthesis and sterepchemistry of ditropylium metal carbonyl complexes(1980)17 cited
• → Effect of Deprotonation of a Benzimidazolyl Ligand on the Redox Potential and the Structures of Mononuclear Ruthenium(II) Complexes(2007)5 cited