Rhenium diimine complex polymer

The optoelectronic properties of conjugated polymers containing the rhenium diimine unit [Re(CO)3(phen)Cl] have been studied. Charge-carrier mobility measurements showed that the presence of metal complexes could facilitate the charge-transport process, and the enhancement in carrier mobility was dependent on the metal content in the polymer. The use of transition metal complexes for both photovoltaic and electroluminescence applications was demonstrated. 

All these polymers, A (39), B (40), C (41,42), D (43), showed distinctive absorption and emission due to the MLCT transition of the rhenium(I) diimine complexes. Among these rhenium-containing polymers, polymer C has the most notable emission properties, with an emission quantum yield and a lifetime ( e = 0.132, Te = 2019ns in a deaerated CH2CI2 solution) comparable to those of the corresponding mononuclear complex (0e = O.181, Te = 2200 ns) (43). 

The Heck coupling reaction has been shown to be effective in preparing polymers 37 containing rhenium-complexed diimine ligands bridged by phenylene vinylene groups [74]. Photovoltaic devices prepared using this material showed rather low efficiencies. 

In recent years, this section of this report has been dominated by the photochemical and photophysical properties of Re(CO)3(diimine)X complexes. Although the main deluge of research is over, there are still examples to be found. The photochemical/physical properties of monomer and polymer species with ReI(CO)3(phen) chromophores has been investigated by Wolcan and Ferraudi, and proton-controlled photoisomerisation of rhenium(I) tricarbonyl bipyridine linked to amine or azacrown ether groups by a styryl pyridine bridging ligand has been discovered by Perutz et alP... 

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