Estimation of excited-state redox potentials by electron-transfer quenching. Application of electron-transfer theory to excited-state redox processes

Bock, C. R.; Connor, J. A.; Gutierrez, A. R.; Meyer, Thomas J.; Whitten, David G.; Sullivan, B. Patrick; Nagle, Jeffrey K.

doi:10.1021/ja00511a007

Cited by 490 publications

(361 citation statements)

References 9 publications

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“…Because of this reaction, the lifetime of Ru(bpy) 3 3+ complex at pH 10 is greatly reduced in comparison to that at pH 5-7 [36]. However [Ru(bpy) 3 2+ ]* lies about 2.2 V above the ground state, which also has been reported in the previous work [34], indicating that the intermediate involved in the CL step must be a fairly high energetic one. The Ru(bpy) 3 3+ complex could be reduced by hydroxide, the same as their reaction in homogeneous system [28,33].…”

Section: Methodssupporting

confidence: 75%

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Chemiluminescent investigation of tris(2,2'-bipyridyl)ruthenium(II) immobilized on a cationic ion-exchange resin and its application to analysis

Lin

Yamada

2002

Analytical and Bioanalytical Chemistry

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Tris-(2, 2'-bipyridyl)ruthenium(II) complex, Ru(bpy) 3 2+ , was immobilized on the Dowex-50 W cationic ion-exchange resin. The chemiluminescent characteristics of Ru(bpy) 3 2+ in solution and in resin form were compared by using batch and flow injection methods. A strong chemiluminescence was observed during the reaction of Ru(bpy) 3 2+ both in solution and in resin with KMnO 4 or Ce(SO 4 ) 2 under acidic or basic conditions. The Ru(bpy) 3 2+ immobilized resin is stable, which can be used at least for 6 months when it reacts with the dilute KMnO 4 solution. Based on this property, Ru(bpy) 3 2+ immobilized in the resin phase was developed as a flow-through chemiluminescent sensor that could be used to determine oxalate, sulfite and ethanol chemically or electronically with Ru(bpy) 3 3+ generation on the surface of resin. The limits of detection were 1×10 -6 M for oxalate, 0.5% (v/v) for ethanol and 1×10 -7 M for sulfite. The method has been successfully applied to determine sulfite in sugar.

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Section: Methodssupporting

confidence: 75%

“…The enhanced oxidizing and reducing properties of the excited state mean that it is unstable with respect to disproportionate into Ru(bpy) 3 3+ and Ru(bpy) 3 + and Meyer et al have confirmed that the disproportionation reaction can be catalyzed chemically [30,34].…”

Section: Methodsmentioning

confidence: 99%

Chemiluminescent investigation of tris(2,2'-bipyridyl)ruthenium(II) immobilized on a cationic ion-exchange resin and its application to analysis

Lin

Yamada

2002

Analytical and Bioanalytical Chemistry

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“…The PET reaction of [Re 6 ] 4-with A in acetonitrile is assumed to proceed by the several steps as shown in Scheme 1 [6,29,30] A bimolecular quenching rate constant (k o ) in CH 3 CN at a given temperature (T) was determined by the slope value of the Stern-Volmer plot on the basis of emission intensity or lifetime measurements. For the emission intensity quenching experiments, the emission lifetime of [Re 6 ] 4-in the absence of A (s) at a given T was determined by separate experiments.…”

Section: Photoinduced Electron Transfer Reactions 213mentioning

confidence: 99%

Photoinduced Electron Transfer Reactions of Hexarhenium(III) Cluster: Oxidative Quenching of [Re6S8Cl6]4− Emission by Electron Acceptors

et al. 2014

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The photoredox ability of a hexarhenium(III) cluster, [Re 6 (l 3 -S) 8 Cl 6 ] 4-, in acetonitrile was examined on the basis of the emission quenching experiments of the cluster by a series of neutral organic electron acceptors (A). The photoinduced electron transfer quenching rate constants and the relevant activation parameters demonstrated that the hexarhenium(III) cluster acted as a useful photoredox sensitizer towards various A and the system gave a high charge separation yield owing to electrostatic repulsion between the product ions: [Re 6 (l 3 -S) 8 Cl 6 ] 3-and A -. These results were proved explicitly by nanosecond transient absorption spectroscopy.

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“…Manakala, kadar tindak balas foto-uraian BTB bagi tertib pertama adalah sama dengan k[BTB], dengan k adalah pekali kadar yang bernilai 0.0026 minit -1 . Kompleks Ru(II) yang teruja, Ru(II)* memiliki kuasa penurunan dan pengoksidaan yang jauh lebih baik daripada keadaan asasnya (Bock et al 1979;Prier et al 2013). Skema foto-uraian BTB berdasarkan pengiraan DFT dicadangkan dalam Rajah 5.…”

Section: Kaedah Pengiraan Dftunclassified

Sintesis, Pencirian Spektroskopi dan Sifat Fotomangkin Rutenium(II) Bis(bipiridil)- 2-(1H-pirazol-3-il)piridi

Mark-Lee¹,

Ng²,

Minggu³

et al. 2017

JSM

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ABSTRAKKompleks Ru (II), [Ru(bpy) 2 (pypzH)] (PF 6 ) 2 dengan bpy = 2,2'-bipiridil dan pypzH= 2-(1H-pirazol-3-il) DFT Complexes [Ru(bpy) 2 (pypzH)](PF 6 ) 2 where bpy = 2,2'-bipyridyl and pypzH= 2-(1H-pyrazol-3-yl)piridine was synthesised and characterised with spectroscopic techniques including Fourier transform infrared (FTIR), UV-visible (UV-Vis) and nuclear magnetic resonance (NMR) and mass spectrometry. Density functional theory (DFT) and time-dependent (TD)

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Estimation of excited-state redox potentials by electron-transfer quenching. Application of electron-transfer theory to excited-state redox processes

Cited by 490 publications

References 9 publications

Chemiluminescent investigation of tris(2,2'-bipyridyl)ruthenium(II) immobilized on a cationic ion-exchange resin and its application to analysis

Chemiluminescent investigation of tris(2,2'-bipyridyl)ruthenium(II) immobilized on a cationic ion-exchange resin and its application to analysis

Photoinduced Electron Transfer Reactions of Hexarhenium(III) Cluster: Oxidative Quenching of [Re6S8Cl6]4− Emission by Electron Acceptors

Sintesis, Pencirian Spektroskopi dan Sifat Fotomangkin Rutenium(II) Bis(bipiridil)- 2-(1H-pirazol-3-il)piridi

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