IntroductionPolypyridine Ru( ) complexes have drawnspecial attention as the efficient sensitizer ofphotovoltaic cells based on nanocrystalline Ti O2since Gratzel s pioneering work on thissubject[1— 3] . Ru( ) complexes possess intenseabsorption in visi IntroductionPolypyridineRu () complexes have drawnspecial attention as the efficient sensitizer ofphotovoltaic cells based on nanocrystalline Ti O2since Gradtzels pioneering work on this object [1- 3]. Ru () complexes have intense absorption in visi