Luminescence of tris(2,2'-bipyridine)ruthenium(II) dichloride

Lytle, Fred E.; Hercules, David M.

doi:10.1021/ja01030a006

Cited by 213 publications

(108 citation statements)

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“…In the case of complex 2 the value q'= 0.003 was obtained. The spectroscopic properties of the Ru(I1)-(bipyridine)j+ complex have been investigated [3S] and in EPA-solution the quantum yield q'= 0.28 [36] was found at 12".…”

Section: Electron Transfer In Monolayer Assembliesmentioning

confidence: 99%

Electron Transfer in Monolayer Assemblies with Incorporated Ruthenium (II) Complexes

Seefeld

Möbius

Kuhn

1977

Helvetica Chimica Acta

101

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SummaryAn arrangement for light induced vectorial charge separation is discussed in which the electron of the excited dye is transferred to an acceptor and the dye is recovered by electron tunneling through a high and narrow potential barrier. The possible relevance of the model in connection with photosynthesis is considered. Monolayers of Ru (11)-bipyridine complexes with long chain hydrocarbon substituents were investigated which may be useful as component in such arrangements.The surface pressure area isotherms of the monolayers were measured for various ionic compositions of the subphase, and the results demonstrate a strong effect of these ions on the structure of the layers. The layers were deposited on different substrates. The luminescence and its change by contacting the sample with water and by subsequent drying were found to be strongly dependent on the architecture of the layer assembly. Attempts of a photochemical cleavage of water with these assemblies failed.The pH-dependence of the absorption and the luminescence of a Ru (11) bipyridine-dicarboxylic acid complex in solution is interpreted by assuming that the electron in the excited state is localized in one pyridine part of the substituted ligand, the conjugation with the second half of the bipyridine carboxylic acid being negligible. Monolayer assemblies for measuring the energy transfer from the ruthenium complex to an adequate energy acceptor and from an adequate energy donor to the ruthenium complex were investigated. The results demonstrate that the deactivation of the excited ruthenium complex occurs mainly by passing the luminescent state.Assemblies were investigated for measuring the electron transfer from the excited ruthenium complex to an appropriate electron acceptor positioned in the carboxylate portion at the same interface as the electron donor. With bipyridinium ions as acceptor the ruthenium complex luminescence is quenched at average distances between acceptor molecules of about 10 A, while this distance is 30,60 und 75 8, for different cyanine dyes used instead of the ruthenium complex. A correlation between this distance and the ionization energy in the excited state of the donor is observed. Introduction. -In attempting a photolytic cleavage of water, arrangements of specific molecular organization are of interest which allow the photo-electron to shift along a distinct path. An electron source and an electron sink are obtained where the aimed reduction and oxidation processes, respectively, should take place, if adequate catalysts are present. This directionality of the motion of electrons can be achieved by providing an adequate potential profile of the insulating barrier. A thin and high barrier should separate the excited dye and the electron donor, and prevent the photo-electron to move towards the donor. A lower and broader barrier should allow the excited electron to reach the acceptor and prevent its return to the oxidized dye. The thin barrier between dye molecule and donor, on the other hand, should permit an elect...

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Section: Electron Transfer In Monolayer Assembliesmentioning

confidence: 99%

Electron Transfer in Monolayer Assemblies with Incorporated Ruthenium (II) Complexes

Seefeld

Möbius

Kuhn

1977

Helvetica Chimica Acta

101

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“…Tris(bipyridine)ruthenium(II) chloride ([Ru(bipy) 3 ]Cl 2 ) 80,81 has been chosen as a test-case to demonstrate the reliability of our approach also for larger systems. Following the procedure presented in recent theoretical studies 82,83 , geometry optimization, as well as force and frequency calculations have been carried out by using the exchange-correlation functional B3PW91 with the LANL2DZ basis set.…”

Section: Tris(bipyridine)ruthenium(ii) Chloridementioning

confidence: 99%

A general time-dependent route to Resonance-Raman spectroscopy including Franck-Condon, Herzberg-Teller and Duschinsky effects

Baiardi

Bloino

Barone

2014

The Journal of Chemical Physics

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We present a new formulation of the time-dependent theory of Resonance-Raman spectroscopy (TD-RR). Particular attention has been devoted to the generality of the framework and to the possibility of including different effects (Duschinsky mixing, Herzberg-Teller contributions). Furthermore, the effects of different harmonic models for the intermediate electronic state are also investigated. Thanks to the implementation of the TD-RR procedure within a general-purpose quantum-chemistry program, both solvation and leading anharmonicity effects have been included in an effective way. The reliability and stability of our TD-RR implementation are first validated against our previously proposed and well-tested time-independent procedure. Practical applications are illustrated with some closed-and open-shell medium-size molecules (anthracene, phenoxyl radical, benzyl radical) and the simulated spectra are compared to the experimental results. More complex and larger systems, not limited to organic compounds, are also feasible, as shown for the case of Tris(bipyridine)ruthenium(II) chloride.

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“…2+ complex at 453 nm in the solution. [66,67] The UV-visible spectra were measured after 60 minutes upon the addition of the corresponding anion in order to allow a complete dye delivery. 2+ delivery inhibition.…”

Section: Materials Characterizationmentioning

confidence: 99%

Delivery modulation in silica mesoporous supports via functionalization in the pore outlets with a Zn(II)–bis(2-pyridylmethyl)amine complex

Bartovský

Ribes

Agostini

et al. 2014

Inorganica Chimica Acta

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ElsevierBartovsky ., P.; Ribes, À.; Agostini, A.; Benito Beorlegui, Á.; Martínez-Máñez, R. (2014). Delivery modulation in silica mesoporous supports via functionalization in the pore outlets with a Zn(II) bis(2-pyridylmethyl)amine complex. release. The delivery observed was clearly related with the ability of the anion to form complexes with the Zn(II)-dipicolylamine groups and with the size and charge of the anion.

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Luminescence of tris(2,2'-bipyridine)ruthenium(II) dichloride

Cited by 213 publications

References 1 publication

Electron Transfer in Monolayer Assemblies with Incorporated Ruthenium (II) Complexes

Electron Transfer in Monolayer Assemblies with Incorporated Ruthenium (II) Complexes

A general time-dependent route to Resonance-Raman spectroscopy including Franck-Condon, Herzberg-Teller and Duschinsky effects

Delivery modulation in silica mesoporous supports via functionalization in the pore outlets with a Zn(II)–bis(2-pyridylmethyl)amine complex

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