Photophysical properties of rhenium(I) diimine complexes: observation of room-temperature intraligand phosphorescence

Shaw, John R.; Schmehl, Russell H.

doi:10.1021/ja00002a001

Cited by 103 publications

(83 citation statements)

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“…For example, the complex [(bpy) 2 Ru(bp_vphv_bp)Ru(bpy) 2 ] is effectively an energy donor-acceptor system involving two Ru(II) diimine complex donors and a ligand localized acceptor. (Shaw et al 1990;Shaw and Schmehl 1991) The lowest energy excited state of bp_vphv_bp bridge is a 3 (p-p*) state with an energy (approx. 14,500 cm )1 ) significantly lower than that of the 3 MLCT state (approx.…”

Section: Influence Of Ligand Localized Excited States On Excited Statmentioning

confidence: 99%

The influence of bridging ligand electronic structure on the photophysical properties of noble metal diimine and triimine light harvesting systems

Wang

Guerzo

Baitalik³

et al. 2006

Photosynth Res

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This manuscript discusses the photophysical behavior of transition metal complexes of Ru(II) and Os(II) employed in development of light harvesting arrays of chromophores. Particular emphasis is placed on the relationship between the photophysical behavior of complexes having metal-to-ligand charge transfer (MLCT) excited states and the electronic characteristics of bridging ligands used in preparing oligometallic complexes. Examples are presented that discuss intramolecular energy migration in complexes having two distinct MLCT chromophores with bridging ligands that only very weakly couple the two chromophores. In addition, systems having bridging ligands with localized triplet excited states lower in energy than the MLCT state of the metal center to which they are attached are discussed. These systems very often have excited states localized on the bridging ligand with excited state lifetimes on the order of tens of microseconds. Finally, systems having Fe(II) metal centers, with very low energy MLCT states, are discussed. In complexes also containing bridging ligands with low energy triplet states, energy partitioning between the Fe center MLCT state (or Fe localized ligand field states) and the ligand triplet state is observed; the two states relax to the ground state via parallel pathways, but the Fe(II) center does not serve as an absolute excitation energy sink.

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Section: Influence Of Ligand Localized Excited States On Excited Statmentioning

confidence: 99%

The influence of bridging ligand electronic structure on the photophysical properties of noble metal diimine and triimine light harvesting systems

Wang

Guerzo

Baitalik³

et al. 2006

Photosynth Res

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“…The band is tentatively assigned to the dp ! p * (pyca) MLCT transition (Table 6) by comparison with the numerous related compounds of the form, Re(a-diimine)(CO) 3 Cl, that have been similarly assigned [31][32][33][34][35][36][37]. One closely related compound that has been examined previously is Re-(CO) 3 Cl(pyca-i-Pr).…”

Section: Bond Lengthsmentioning

confidence: 99%

Preparation and characterization of rhenium(I) compounds with amino ester derivatized diimine ligands. Investigations of luminescence. Crystal structures of Re(CO)3Cl(pyca-β-Ala-OEt) and Re(CO)3Cl(pyca-l-Asp(OMe)-OMe)

Herrick

Wrona

McMicken

et al. 2004

Journal of Organometallic Chemistry

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“…Comparing with the ligands, although the introduction of the heavy metal Re enhances the radiative relaxation of the triplets, the photophosphorescence from these kinds of Re(I) complexes can be observed only in low-temperature glass. [14][15][16] Because the EL mechanism is generally consistent with that of PL, people usually select highly efficient PL materials as emissive centers in OLEDs, and a number of highly efficient OLEDs based on the highly efficient PL materials have been obtained. Nevertheless, there are exceptional cases in which dominant mechanisms during electric and optical processes are different.…”

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confidence: 99%

Observation of red intraligand electrophosphorescence from a stilbene-containing Re(I) complex

Hong

et al. 2004

Applied Physics Letters

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Red organic light-emitting diodes using a rhenium(I) bipyridyl complex, fac-[ClRe(CO)3(trans-4-methyl-4′-(2-4-octadecyloxylphenyl)vinyl)-2,2′-bipyridine] (Re-mopvb), as an emitter were fabricated. The optimized device has a bilayer structure of indium-tin oxide∕poly(N-vinylcarbazole): 2 wt. % Re-mopvb (80 nm)∕2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (50 nm)∕LiF (1 nm)∕Al (150 nm). Although no photoluminescence from Re-mopvb in the room-temperature solution appeared due to photoinduced isomerization, a bright red electrophosphorescence from an intraligand excited state of Re-mopvb was observed at room temperature, indicating the promising future of such a class of electroluminescent materials. The maximum luminance exceeding 120cd∕m2 at 11 V and maximum efficiency of 0.75 cd∕A at 7.5 V were obtained.

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Photophysical properties of rhenium(I) diimine complexes: observation of room-temperature intraligand phosphorescence

Cited by 103 publications

References 0 publications

The influence of bridging ligand electronic structure on the photophysical properties of noble metal diimine and triimine light harvesting systems

The influence of bridging ligand electronic structure on the photophysical properties of noble metal diimine and triimine light harvesting systems

Preparation and characterization of rhenium(I) compounds with amino ester derivatized diimine ligands. Investigations of luminescence. Crystal structures of Re(CO)3Cl(pyca-β-Ala-OEt) and Re(CO)3Cl(pyca-l-Asp(OMe)-OMe)

Observation of red intraligand electrophosphorescence from a stilbene-containing Re(I) complex

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