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Ruthenium(II) Photosensitizers of Tridentate Click‐Derived Cyclometalating Ligands: A Joint Experimental and Computational Study
Author(s) -
Schulze Benjamin,
Escudero Daniel,
Friebe Christian,
Siebert Ronald,
Görls Helmar,
Sinn Stephan,
Thomas Martin,
Mai Sebastian,
Popp Jürgen,
Dietzek Benjamin,
González Leticia,
Schubert Ulrich S.
Publication year - 2012
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201103451
Subject(s) - ruthenium , chemistry , ligand (biochemistry) , photochemistry , excited state , redox , benzene , metal , single crystal , crystallography , inorganic chemistry , catalysis , organic chemistry , biochemistry , physics , receptor , nuclear physics
A systematic series of heteroleptic bis(tridentate)ruthenium(II) complexes of click‐derived 1,3‐bis(1,2,3‐triazol‐4‐yl)benzene N^C^N‐coordinating ligands was synthesized, analyzed by single crystal X‐ray diffraction, investigated photophysically and electrochemically, and studied by computational methods. The presented comprehensive characterization allows a more detailed understanding of the radiationless deactivation mechanisms. Furthermore, we provide a fully optimized synthesis and systematic variations towards redox‐matched, broadly and intensely absorbing, cyclometalated ruthenium(II) complexes. Most of them show a weak room‐temperature emission and a prolonged excited‐state lifetime. They display a broad absorption up to 700 nm and high molar extinction coefficients up to 20 000 M −1 cm −1 of the metal‐to‐ligand charge transfer bands, resulting in a black color. Thus, the complexes reveal great potential for dye‐sensitized solar‐cell applications.