Pyrrolidine-Containing Polypyridines: New Ligands for Improved Visible Light Absorption by Ruthenium Complexes
摘要:
A range of new electron-releasing pyrrolidine-containing bipyridines and terpyridines has been prepared via selective metalation-cross-coupling sequences. The obtained ligands have been involved in microwave-assisted ruthenium complexation leading to homoleptic complexes in high yield. The electron-donor effect of the pyrrolidine nucleus led to a notable improvement of visible light absorption and strong changes in the electrochemical behavior, opening new opportunities for the design of photovoltaic devices.
Tuning of Ruthenium Complex Properties Using Pyrrole- and Pyrrolidine-Containing Polypyridine Ligands
作者:David Martineau、Marc Beley、Philippe C. Gros、Silvia Cazzanti、Stefano Caramori、Carlo A. Bignozzi
DOI:10.1021/ic062042f
日期:2007.3.1
The effect of pyrrole- and pyrrolidine-containing ligands (L) on the properties of heteroleptic [RuL(2)dcbpy](2+) complexes has been investigated. TiO2 electrodes modified with the new complexes exhibited extended absorption domains and high absorbances. Providing that a cobalt-based mediator was used for regeneration of the Ru-II state, good incident photon-to-current efficiency (near 80%) values were obtained in the pyrrole series.