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5‐(2‐Thienyl)tetrazolates as Ligands for Ru II –Polypyridyl Complexes: Synthesis, Electrochemistry and Photophysical Properties
Author(s) -
Stagni Stefano,
Palazzi Antonio,
Brulatti Pierpaolo,
Salmi Mauro,
Muzzioli Sara,
Zacchini Stefano,
Marcaccio Massimo,
Paolucci Francesco
Publication year - 2010
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201000405
Subject(s) - chemistry , electrophile , electrochemistry , reactivity (psychology) , density functional theory , ligand (biochemistry) , regioselectivity , absorption spectroscopy , crystallography , crystal structure , terpyridine , spectroscopy , stereochemistry , metal , computational chemistry , catalysis , organic chemistry , receptor , electrode , pathology , quantum mechanics , medicine , biochemistry , physics , alternative medicine
In this contribution, we report the synthesis, the characterization and the study of the electrochemical and photophysical properties of some novel mononuclear Ru II –polypyridyl complexes of the general formula [Ru(tpy)(bpy) L ] + (tpy = 2,2′:6′,2"‐terpyridine, bpy = 2,2′‐bipyridyl) in which L is represented by 5‐(2‐thienyl)tetrazolate‐type ligands. In addition, the reactivity of these 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 structural determination. Also, the electronic properties of the complexes have been explored by means of absorption and emission spectroscopy, together with a detailed electrochemical investigation combined with density functional theory (DFT) calculations. The data obtained from the study of such “model” mononuclear species constituted the basis for the characterization of the corresponding bithienyl‐bridged dinuclear Ru II complex, which displayed similar physical–chemical properties and an analogous behaviour toward the addition of electrophilic agents.