The luminescence properties of multinuclear platinum complexes

Abstract

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Metallodrugs are unique: opportunities and challenges of discovery and development

“…274 Weakly-or non-luminescent metal complexes can be conjugated to uorescent organic dyes or more-strongly luminescent metal complexes to allow their cellular imaging. 78,275 The non-emissive dinuclear (bpy) 2 Ru II -Eu III (cyclen) (Eu-Ru1 †) complex releases DNA-targeting Ru II and an emissive Eu III (cyclen) species upon irradiation at 488 nm. 276 The red emission of Eu III (cyclen) species can be detected in cancer cells with 350 nm one-photon or 700 nm two-photon near-infrared excitation.…”

Dinuclear Design of a Pt(II) Complex Affording Highly Efficient Red Emission: Photophysical Properties and Application in Solution-Processible OLEDs

“…However, multinuclear metal complexes -featuring two or more metal ions linked via rigid bridging ligands -have begun to emerge as a distinct class of phosphorescent molecules. 13,14 In particular, dinuclear Ir(III) and Pt(II) complexes bridged by cyclometallating, pyrimidine-based ligands display unusually high phosphorescence quantum yields, apparently due to unusually high triplet radiative decay rate constants k r . 15,16,17,18,19 This property of enhanced k r is especially attractive for the development of deeply red-emitting systems, since the efficiencies of visible emitters normally fall off at long wavelengths.…”

Multinuclear PtII Complexes: Why Three is Better Than Two to Enhance Photophysical Properties

“…As trategy to solve such af undamental problem is to design multinuclear Pt II complexes in which the establishmento fP t•••Pt and/or p-p stacking interactions is obtained by polytopic auxiliary ligands. [51][52][53] For example, Che and co-workers [54] reported a series of trinucleart ridentate cyclometalated platinum(II) complexes, tethered by tris-phosphine auxiliary linkers, and compared the photophysical properties with those of their monoand binuclear homologues. However,t he behavior of the reported multinuclear Pt II -complexes in solution has not been reported at different concentrationst ou nravel the intermolecular versus intramolecular interactions.…”