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Synthesis, Spectroscopic, and Electrochemical Properties of Four Novel Trinuclear Ru II Polypyridyl Complexes Containing Diazafluorene
Author(s) -
Cheng Feixiang,
Wang Fan,
Yang Siya,
Tang Ning,
Chen Longhai
Publication year - 2010
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201000142
Subject(s) - chemistry , tris , ruthenium , ligand (biochemistry) , cyclic voltammetry , benzene , electrochemistry , propane , medicinal chemistry , photochemistry , crystallography , organic chemistry , catalysis , electrode , biochemistry , receptor
Four tripodal ligands L 1–4 derived from 4,5‐diazafluoren‐9‐one were synthesized. L 1–2 formed by the reaction of 4,5‐diazafluoren‐9‐oxime with 1,3,5‐tris(bromomethyl)benzene, and 1,1,1‐tris( p ‐tosyloxymethyl)propane, respectively and L 3–4 formed by the condensation of 9‐(4‐hydroxy)phenylimino‐4,5‐diazafluorene with 1,3,5‐tris(bromomethyl)benzene, and 1,1,1‐tris( p ‐tosyloxymethyl)propane, respectively. Four trinuclear complexes [(bpy) 6 Ru 3 L 1–4 ](PF 6 ) 6 ( Ru‐L 1–4 ) were obtained by reaction of Ru(bpy) 2 Cl 2 · 2H 2 O with ligands L 1–4 . The photophysical behaviors of these complexes were investigated by UV/Vis absorption and emission spectrometry. The complexes display metal‐to‐ligand charge transfer absorptions at 441–445 nm and emissions at 571–578 nm. Cyclic voltammetry data of the complexes show one Ru II ‐centered oxidation and three successive ligand‐centered reductions.