Conrolling of radical-ion pair reactions by microwave radiation: photoconductivity-detected magnetic resonance

Murai, Hisao; Matsuyama, Akihito; Ishida, Tateki; Iwasaki, Yohei; Maeda, Kiminori; Azumi, Tohru

doi:10.1016/s0009-2614(96)01383-8

Cited by 20 publications

(35 citation statements)

References 11 publications

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“…The data of the microwave effect were expressed by the ratio of the signal change with and without the microwave radiation under the external magnetic field. The detailed experimental setup has already been reported recently [ 10,11].…”

Section: Admr Observationmentioning

confidence: 99%

“…It is proposed that the triplet quenching reaction that forms the excited triplet state of TMPD is modulated by the external magnetic field and by the microwave radiation under ESR conditions [2,11]. The current increase of this system is the reflection of the concentration increase of the escaped ion radicals, that is, the lifetime of the RIP [11]. The technique of PCDMR is applicable exclusively to the reactions involving the RIP.…”

Section: Pcdmr Observationmentioning

confidence: 99%

“…The first method was newly developed to study the RIP in photochemistry [11]. The broadened spectrum of the RIP observed by both PCDMR and ADMR methods, and the different spectra of the RIP observed simultaneously by the PCDMR and the DFDMR are presented and discussed briefly.…”

Section: Introductionmentioning

confidence: 99%

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Several RYDMR studies on the radical-ion pair formed in the photolysis of TMPD: Photoconductivity, transient-absorption and fluorescence detection methods

et al. 1997

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Three different RYDMR (reaction-yield detected magnetic resonance) techniques, photoconductivity detected magnetic resonance (PCDMR), transient-absorption detected magnetic resonance (ADMR) and detayed fluorescente detected magnetic resonance (DFDMR), are applied to the investigation of the radical-ion pair formed in the photolysis of TMPD in mixed alcohol solution. Here, PCDMR is a newly developed RYDMR method to study the radical-ion pair. PCDMR and ADMR methods show the acceleration of the quenching reaction from the triplet manifold of the radical-ion pair by microwave radiation under electron spin resonance conditions. These spectra of the radicalion pair are significantly broadened probably because of the dynamic behavior of the radical-ion pair interacting strongly. The long lifetime of the radical-ion pair is due to the Coulomb interaction and the special role of the mixed solvent containing 2-propanol that stabilizes the radical-ion pair. Furthermore, the simultaneous observation of the PCDMR and the DFDMR shows different spectra. This indicates that the spectrum observed by the DFDMR is due to the wealdy interacting RIP formed through the pathway different from those observed by the other two methods.

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Section: Admr Observationmentioning

confidence: 99%

Section: Pcdmr Observationmentioning

confidence: 99%

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Several RYDMR studies on the radical-ion pair formed in the photolysis of TMPD: Photoconductivity, transient-absorption and fluorescence detection methods

et al. 1997

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“…There are several different RYDMR methods such as fluorescence-detected magnetic resonance (FDMR) [30,31], transient-absorption-detected magnetic resonance (ADMR) [33,34] and recently developed PCDMR [37]. The observation of final reaction products of spin-trapped products constitutes a further RYDMR method [32].…”

Section: Controlling Photochemical Reactionsmentioning

confidence: 99%

“…Recent developments in this field enabled us to control the chemical reactions by microwave (MW) field [33][34][35] and to observe quantum beats [36]. A new RYDMR method known as photoconductivity-detected magnetic resonance (PCDMR) was also developed [37].…”

Section: Introductionmentioning

confidence: 99%

Developments of magnetic-resonance-related spin chemistry in Japan

et al. 2003

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Abstraet. A review on the developments of the magnetic-resonance-related spin chemistry in Japan is presented. We describe how studies in this atea started in Japan and developed into the flourishing state of the present. Important contributions made by Japanese spin chemists in the last two decades in three areas, namely, work on chemically induced dynamic electron polarization, excited states and controlling of photochemical reactions, are presented. More emphases are placed on the new deveIopments in recent years, particularty new concepts and new methodologies.

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Time-resolved ESR study on a long-lived radical-ion pair formed in the photoinduced electron-transfer reaction of xanthone and N,N-diethylaniline in 2-propanol

Ishigaki¹,

Murai²

2006

Chemical Physics Letters

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Conrolling of radical-ion pair reactions by microwave radiation: photoconductivity-detected magnetic resonance

Cited by 20 publications

References 11 publications

Several RYDMR studies on the radical-ion pair formed in the photolysis of TMPD: Photoconductivity, transient-absorption and fluorescence detection methods

Several RYDMR studies on the radical-ion pair formed in the photolysis of TMPD: Photoconductivity, transient-absorption and fluorescence detection methods

Developments of magnetic-resonance-related spin chemistry in Japan

Time-resolved ESR study on a long-lived radical-ion pair formed in the photoinduced electron-transfer reaction of xanthone and N,N-diethylaniline in 2-propanol

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