Experimental investigation of excited-state electron-transfer reaction:  effects of free energy and solvent on rates

Chen, Jing Ming.; Ho, Tong‐Ing; Mou, Chung Yuan

doi:10.1021/j100370a030

Cited by 94 publications

(53 citation statements)

References 4 publications

(8 reference statements)

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“…A combination of equations 7-9 was used to obtain kET of 5.89 x 10 9 s -1 . This value is consistent with what is expected for long range photo induced electron transfer reactions within an encounter radius ≥ 7 Ẳ [47][48][49][50] . The activationcontrolled rate constant, ka, of 9.52 x 10 9 s -1 for the reaction under study was determined using the Sutin equation 44 : ka = K(R)kET.…”

Section: Electron Transfer Rate Constantsupporting

confidence: 90%

The photo-physical study of the interaction of riboflavin with Nicotine in bicontinuous microemulsion

Iwunze

2017

Mediterr.J.Chem.,

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Steady-state fluorescence spectroscopy was used to study the interaction of riboflavin with nicotine in a bicontinuous microemulsion system made up of 42.11:13.70:21.34:22.85 % w/w of water: oil: surfactant: cosurfactant. The surfactant used is cetyltrimethylammonium bromide (CTAB), the oil is tetradecane and the cosurfactant is 1-pentanol. It is observed that the interaction of riboflavin and nicotine in the prepared microemulsion lead to the quenching of riboflavin fluorescence. The bimolecular quenching rate constant, kq, of riboflavin by nicotine was observed as 4.15 x 109 M-1 s -1 with an efficiency of 56 %. The mechanism of the reaction is proposed to be diffusion limited in an activated electron transfer reaction in a solvent separated (outer-sphere) scheme. The electron transfer rate constant, kET, was calculated as 5.89 x 109 s -1 with an activation rate constant, ka, of 9.52 x 109 s -1 . The calculated solvent reorganization energy, λs, of the reaction was 1.09 eV, the free energy of interaction, ΔGo , is -2.9 eV and the free energy of activation, ΔG*, was calculated as 0.75 eV.

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Section: Electron Transfer Rate Constantsupporting

confidence: 90%

The photo-physical study of the interaction of riboflavin with Nicotine in bicontinuous microemulsion

Iwunze

2017

Mediterr.J.Chem.,

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“…65,85 The fluorescence quenching rate constant, k q B k N , of almost 60 F/Q pairs in acetonitrile, covering a driving-force range of more than 2.5 eV, was studied. As a matter of fact, almost the entire outcome of their experiment, which has since been reproduced many times, [86][87][88][89][90] was puzzling and still remains a matter of debate (Fig. 5).…”

Section: Driving-force Dependencementioning

confidence: 99%

Bimolecular photoinduced electron transfer reactions in liquids under the gaze of ultrafast spectroscopy

Rosspeintner

Vauthey

2014

Phys. Chem. Chem. Phys.

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Because of their key role in many areas of science and technology, bimolecular photoinduced electron transfer reactions have been intensively studied over the past five decades. Despite this, several important questions, such as the absence of the Marcus inverted region or the structure of the primary reaction product, have only recently been solved while others still remain unanswered. Ultrafast spectroscopy has proven to be extremely powerful to monitor the entire electron transfer process and to access, with the help of state-of-the-art theoretical models of diffusion-assisted reactions, crucial information like e.g. the intrinsic charge separation dynamics beyond the diffusion limit. Additionally, extension of these experimental techniques to other spectral regions than the UV-visible, such as the infrared, has given a totally new insight into the nature, the structure and the dynamics of the key reaction intermediates, like exciplexes and ions pairs. In this perspective, we highlight these recent progresses and discuss several aspects that still need to be addressed before a thorough understanding of these processes can be attained.

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“…Following Rehm and Weller, we treat 'A' as an effective solutionphase collision frequency so that A ¼ 1 Â10 11 s À1 [46]. According to Marcus outer-sphere ET theory, activation energy DG* is given by [46][47][48] DG Ã ¼ ðDG 0 þ lÞ 2 =4l…”

Section: Photoinduced Electron Transfermentioning

confidence: 99%

“…According to Marcus outer-sphere ET theory, activation energy DG* is given by [46][47][48] DG Ã ¼ ðDG 0 þ lÞ 2 =4l…”

Section: Photoinduced Electron Transfermentioning

confidence: 99%

Fluorescence quenching of 9-cyanoanthracene in presence of zinc tetraphenylporphyrin in a polar liquid medium

Mandal¹,

Tiwari²,

Ganguly³

et al. 2009

Journal of Luminescence

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Experimental investigation of excited-state electron-transfer reaction: effects of free energy and solvent on rates

Cited by 94 publications

References 4 publications

The photo-physical study of the interaction of riboflavin with Nicotine in bicontinuous microemulsion

The photo-physical study of the interaction of riboflavin with Nicotine in bicontinuous microemulsion

Bimolecular photoinduced electron transfer reactions in liquids under the gaze of ultrafast spectroscopy

Fluorescence quenching of 9-cyanoanthracene in presence of zinc tetraphenylporphyrin in a polar liquid medium

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