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Luminescent Nitridometal Complexes. Photophysical and Photochemical Properties of the 3xy)1(d?*)1> Excited State of Nitridoosmium(VI) Complexes with Polypyridine Ligands

DOI: 10.1039/DT9950000657

Source and publish data:

Journal of the Chemical Society, Dalton Transactions p. 657 - 664 (1995)

Update date:2022-08-02

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Authors:

Chin, Kwok-FaiChin, Kwok-Fai

Cheung, Kung-KaiCheung, Kung-Kai

Yip, Hon-KayYip, Hon-Kay

Mak, Thomas C. W.Mak, Thomas C. W.

Che, Chi MingChe, Chi Ming

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Article abstract of DOI:10.1039/DT9950000657

Nitridoosmium(VI) complexes of substituted 2,2'-bipyridines and 1,10-phenanthrolines have been prepared from (-) and the appropriate chelating ligands in acetonitrile.Reaction of (bipy = 2,2'-bipyridine) and Cl (terpy = 2,2':6',2''-terpyridine) with neat trifluoromethanesulfonic acid gave (+) and (+) respectively.The crystal structures of (dmbipy = 5,5'-dimethyl-2,2'-bipyridine), (+) and (+) show that the Os<*>N distances are 1.68(1), 1.630(7) and 1.629(8) Angstroem respectively.In the latter two complexes the Os<*>N moiety is perpendicular to the plane of the chelating ligand.The spectroscopic, photophysical and photochemical properties of the newly prepared complexes have been studied.All have long-lived and emissive 3xy,d?*> excited states in the solid state and in fluid solution at room temperature.The complex mer- has the longest emission lifetime 4.64 μs (at infinite dilution) in degassed acetonitrile at room temperature.Based on quenching studies with aromatic hydrocarbons, this complex is a powerful photooxidant with E<*> being 2.12(30) V vs. the normal hydrogen electrode.

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Product name:[Os(4,7-diphenyl-1,10-phenanthroline)NCl3]

Cas No:161991-55-5

161991-55-5

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