Redox and Photochemistry of Bis(terpyridine)ruthenium(II) Amino Acids and Their Amide Conjugates - from Understanding to Applications

Terpyridine and Quaterpyridine Complexes as Sensitizers for Photovoltaic Applications

Terpyridine and quaterpyridine-based complexes allow wide light harvesting of the solar spectrum. Terpyridines, with respect to bipyridines, allow for achieving metal-complexes with lower band gaps in the metal-to-ligand transition (MLCT), thus providing a better absorption at lower energy wavelengths resulting in an enhancement of the solar light-harvesting ability. Despite the wider absorption of the first tricarboxylate terpyridyl ligand-based complex, Black Dye (BD), dye-sensitized solar cell (DSC) performances are lower if compared with N719 or other optimized bipyridine-based complexes. To further improve BD performances several modifications have been carried out in recent years affecting each component of the complexes: terpyridines have been replaced by quaterpyridines; other metals were used instead of ruthenium, and thiocyanates have been replaced by different pinchers in order to achieve cyclometalated or heteroleptic complexes. The review provides a summary on design strategies, main synthetic routes, optical and photovoltaic properties of terpyridine and quaterpyridine ligands applied to photovoltaic, and focuses on n-type DSCs.

Excited state decay of cyclometalated polypyridine ruthenium complexes: insight from theory and experiment

This perspective article tackles the open question why cyclometalated polypyridine ruthenium(ii) complexes typically only emit very weakly at room temperature and delivers answers beyond the standard schemes involving ³MC and tunneling decay channels.

Tuning the photophysical properties of 4′-substituted terpyridines – an experimental and theoretical study

Several 2,2′:6′,2′′-terpyridine derivatives were synthesized and their photophysical properties were investigated by absorption and photoluminescence spectroscopy.

The photochemistry of mono- and dinuclear cyclometalated bis(tridentate)ruthenium(ii) complexes: dual excited state deactivation and dual emission

A low-energy ³LL′CT state efficiently depopulates the emissive ³MLCT state in cyclometalated [Ru(dpb-R)(tpy)]⁺ complexes (dpbH = 1,3-di(2-pyridyl)benzene, tpy = 2,2′;6′,2′′-terpyridine).

Energy transfer and formation of long-lived 3MLCT states in multimetallic complexes with extended highly conjugated bis-terpyridyl ligands

Multimetallic complexes with extended conjugated ligands show efficient energy transfer to the lowest excited states and prolonged Fe(ii) ³MLCT lifetimes.