Quenching of Tris(2,2'-bipyridine)ruthenium(II) Luminescence by Cobalt(III) Polypyridyl Complexes in Different Sites in and on Clays

Awaluddin, Amir; DeGuzman, Roberto N.; Kumar, Challa V.; Suib, Steven L.; Burkett, Sandra L.; Davis, Mark E.

doi:10.1021/j100024a034

Cited by 17 publications

(14 citation statements)

References 5 publications

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“…7. Such electron transfer was observed in the solution phase by the observation of the Ru dye quenching by Co(III) species, 42,43 which also supports this assumption. Hanman et al improved the performance by utilizing a Co redox with sterically bulky ligands, 15 and it is supposed that the separation between the Co redox and the Ru dye worked well to reduce the recombination.…”

Section: Resultssupporting

confidence: 69%

The cause for the low efficiency of dye sensitized solar cells with a combination of ruthenium dyes and cobalt redox

Omata

Kuwahara

Katayama

et al. 2015

Phys. Chem. Chem. Phys.

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It has been a concern that the cobalt redox cannot give a good performance for the dye-sensitized solar cells when it is used with ruthenium dyes. The electron dynamics measurements clarified the electron loss processes, and clarified the cause. The result indicated the direct interaction between the ruthenium dyes with the cobalt redox, and it reduced the charge injection from the triplet state of the dyes to the titanium oxide, and also it increased the electron recombination process with the cobalt redox species. Both the problems of injection and recombination were solved by using the ruthenium dye with alkyl chains keeping a distance between the dye and the cobalt redox.

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Section: Resultssupporting

confidence: 69%

The cause for the low efficiency of dye sensitized solar cells with a combination of ruthenium dyes and cobalt redox

Omata

Kuwahara

Katayama

et al. 2015

Phys. Chem. Chem. Phys.

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“…Since the cationic guest species are strongly bound to the negatively charged silicate layers with electrostatic interactions and do not deintercalate upon the intercalation of C12AO, the possible effect of coadsorption of C12AO on the states of the preadsorbed [Ru(bpy) 3 ] 2+ was investigated. Photochemical and photophysical properties of [Ru(bpy) 3 ] 2+ on clay minerals and other layered materials have been investigated extensively. ,,− , The adsorbed states of [Ru(bpy) 3 ] 2+ on the surfaces of smectites have successfully been controlled by the coadsorption of [Zn(bpy) 3 ] 2+ , [Co(bpy) 3 ] 2+ , and poly(vinyl pyrrolidone). ,, In the present system, the adsorption of C12AO was expected to alter the states of the adsorbed [Ru(bpy) 3 ] 2+ on saponite.…”

Section: Resultsmentioning

confidence: 88%

“…Photochemical and photophysical properties of [Ru-(bpy) 3 ] 2+ on clay minerals and other layered materials have been investigated extensively. 3,4,[26][27][28][29][30][31][32][33][34][35][36][37][38][39]43 The adsorbed states of [Ru(bpy) 3 ] 2+ on the surfaces of smectites have successfully been controlled by the coadsorption of [Zn-(bpy) 3 ] 2+ , [Co(bpy) 3 ] 2+ , and poly(vinyl pyrrolidone). 29,38,39 In the present system, the adsorption of C12AO was expected to alter the states of the adsorbed [Ru(bpy) 3 ] 2+ on saponite.…”

Section: Resultsmentioning

confidence: 99%

“…In other words, one can modify the attractive properties of [Ru(bpy) 3 ] 2+ by introducing it into appropriate matrixes. Along this line, the photochemical and photophysical characteristics of [Ru(bpy) 3 ] 2+ adsorbed on smectites have been investigated so far. ,,− The spectroscopic characteristics of the adsorbed [Ru(bpy) 3 ] 2+ were expected to reflect the change in the microenvironments caused by the coadsorption of C12AO.…”

Section: Introductionmentioning

confidence: 99%

“…Along this line, the photochemical and photophysical characteristics of [Ru(bpy) 3 ] 2+ adsorbed on smectites have been investigated so far. 3,4,[26][27][28][29][30][31][32][33][34][35][36][37][38][39] The spectroscopic characteristics of the adsorbed [Ru(bpy) 3 ] 2+ were expected to reflect the change in the microenvironments caused by the coadsorption of C12AO.…”

Section: Introductionmentioning

confidence: 99%

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Preparation of Smectite/Dodecyldimethylamine N-oxide Intercalation Compounds

1998

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The adsorption of dodecyldimethylamine N-oxide into the interlayer space of Na-saponite was investigated. The Na-saponite/dodecyldimethylamine N-oxide intercalation compounds were prepared as supported and unsupported films. Intercalation compounds with two different arrangements of the intercalated dodecyldimethylamine N-oxide were obtained, depending on the adsorbed amounts. When the adsorbed amount was greater than 400 mmol/100 g of clay, the intercalated dodecyldimethylamine N-oxide took a paraffin type bilayer. On the other hand, the intercalated dodecyldimethylamine N-oxide molecules are thought to arrange as a bimolecular coverage with their alkyl chains parallel to the silicate sheet when the added amount of dodecyldimethylamine N-oxide was 100 mmol/100 g of clay. The coadsorption of tris(2,2‘-bipyridine)ruthenium(II) with dodecyldimethylamine N-oxide was achieved. The luminescence characteristics of tris(2,2‘-bipyridine)ruthenium(II) revealed that there are certain interactions between the adsorbed tris(2,2‘-bipyridine)ruthenium(II) and dodecyldimethylamine N-oxide in the interlayer space of saponite. Since the products have been obtained as highly transparent supported and self-standing films, the intercalation of dodecyldimethylamine N-oxide is a way to control the adsorbed states of cationic dyes on the surface of smectites.

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