Enhanced electrochemiluminescence efficiency of Ru(ii) derivative covalently linked carbon nanotubes hybrid

Li, Jing; Guo, Lirong; Gao, Wei; Xia, Xing‐Hua; Zheng, Li‐Min

doi:10.1039/b916007h

Cited by 33 publications

(37 citation statements)

References 21 publications

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“…Zhang [409] and Xia and Zheng [410] used EDC/NHS amidation to covalently anchor ruthenium complexes on CNTs for electrochemiluminescence studies (Table 24, entries 1-2). Similarly, EDC/NHS activation system allowed Kim [411] to prepare supported NHC-based catalysts via the covalent attachment of an imidazolium on the carboxylate functionalities of GO (Table 24, entry 3).…”

Section: ) 3 ][Bf 4 ] (mentioning

confidence: 99%

Coordination chemistry on carbon surfaces

Axet¹,

Dechy‐Cabaret²,

Durand³

et al. 2016

Coordination Chemistry Reviews

106

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Section: ) 3 ][Bf 4 ] (mentioning

confidence: 99%

Coordination chemistry on carbon surfaces

Axet¹,

Dechy‐Cabaret²,

Durand³

et al. 2016

Coordination Chemistry Reviews

106

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“…Also the electrochemiluminescence of a Ru complex covalently bonded to SWCNT has been recently reported. [34] Herein we have found unique photochemical behavior of Ru-SWCNTs compared to related materials studied so far in terms of the dependence of the photochemistry on the light intensity and on the excitation wavelength. Ru-SWCNT exhibits an unprecedented two-photon photochemistry that arises from a combination of factors including the long-lifetime of the ruthenium-localized exciton, the relative energy of the HOMO/LUMO [RuA C H T U N G T R E N N U N G (bpy) 3 ] 2 + orbitals with respect to the SWCNT, and the ability of the SWCNT as electron conductor.…”

Section: Time-resolved Absorption Optical Spectroscopy Allows the Detmentioning

confidence: 97%

Two‐Photon Chemistry in Ruthenium 2,2′‐Bipyridyl‐Functionalized Single‐Wall Carbon Nanotubes

Martín¹,

Jiménez²,

Álvaro³

et al. 2010

Chemistry A European J

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Ruthenium polypyridyl complexes are widely used as light harvesters in dye-sensitized solar cells. Since one of the potential applications of single-wall carbon nanotubes (SWCNTs) and their derived materials is their use as active components in organic and hybrid solar cells, the study of the photochemistry of SWCNTs with tethered ruthenium polypyridyl complexes is important. A water-soluble ruthenium tris(bipyridyl) complex linked through peptidic bonds to SWCNTs (Ru-SWCNTs) was prepared by radical addition of thiol-terminated SWCNT to a terminal C=C double bond of a bipyridyl ligand of the ruthenium tris(bipyridyl) complex. The resulting macromolecular Ru-SWCNT (approximately 500 nm, 15.6% ruthenium complex content) was water-soluble and was characterized by using TEM, thermogravimetric analysis, chemical analysis, and optical spectroscopy. The emission of Ru-SWCNT is 1.6 times weaker than that of a mixture of [Ru(bpy)(3)](2+) and SWCNT of similar concentration. Time-resolved absorption optical spectroscopy allows the detection of the [Ru(bpy)(3)](2+)-excited triplet and [Ru(bpy)(3)](+). The laser flash studies reveal that Ru-SWCNT exhibits an unprecedented two-photon process that is enabled by the semiconducting properties of the SWCNT. Thus, the effect of the excitation wavelength and laser power on the transient spectra indicate that upon excitation of two [Ru(bpy)(3)](2+) complexes of Ru-SWCNT, a disproportionation process occurs leading to delayed formation of [Ru(bpy)(3)](+) and the performance of the SWCNT as a semiconductor. This two-photon delayed [Ru(bpy)(3)](+) generation is not observed in the photolysis of [Ru(bpy)(3)](3+); SWCNT acts as an electron wire or electron relay in the disproportionation of two [Ru(bpy)(3)](2+) triplets in a process that illustrates that the SWCNT plays a key role in the process. We propose a mechanism for this two-photon disproportionation compatible with i) the need for high laser flux, ii) the long lifetime of the [Ru(bpy)(3)](2+) triplets, iii) the semiconducting properties of the SWNT, and iv) the energy of the HOMO/LUMO levels involved.

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“…Although the mechanism was different that from the enzyme based detection [8], in both sensors, the covalent procedure afforded the best sensitivity. In a similar way, enhanced electrochemiluminescence efficiency was reported by covalent attachment of Ru(II) derivative to carbon nanotubes [13]. The electrochemical activity was indeed improved by 17 times compared to the non-covalently absorbed Ru(II) derivative on CNTs.…”

Section: Amidationmentioning

confidence: 75%

Enhancing the Surface Sensitivity and Selectivity: Functionalization of Carbon Nanomaterials

Blondeau

2014

Carbon for Sensing Devices

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Enhanced electrochemiluminescence efficiency of Ru(ii) derivative covalently linked carbon nanotubes hybrid

Cited by 33 publications

References 21 publications

Coordination chemistry on carbon surfaces

Coordination chemistry on carbon surfaces

Two‐Photon Chemistry in Ruthenium 2,2′‐Bipyridyl‐Functionalized Single‐Wall Carbon Nanotubes

Enhancing the Surface Sensitivity and Selectivity: Functionalization of Carbon Nanomaterials

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