Chiral discrimination in fluorescence quenching

Yorozu, Takehiko; Hayashi, Koichiro; Irie, Masahiro

doi:10.1021/ja00408a033

Cited by 87 publications

(38 citation statements)

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“…At present, there are only a few examples of the influence of chirality on photochemical processes [4,5,6,7,8,9,10,11,12]. The difference in the radical transformation of the (R) and (S) enantiomers of 2-phenylpropionic acid in the reaction with 4-methyl-2-quinolinecarbonitrile was detected using spin chemistry methods [13].…”

Section: Introductionmentioning

confidence: 99%

Spin effects in intramolecular electron transfer in naproxen-N-methylpyrrolidine dyad

Magin

Polyakov

Khramtsova

et al. 2011

Chemical Physics Letters

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The intramolecular electron transfer in the naproxen-N-methyl-pyrrolidine dyad has been investigated by spin chemistry methods. The existence of CIDNP in a high magnetic field points to electron transfer as a possible mechanism of the quenching of the excited state of a dyad.However, the failure to detect magnetic field effects on triplet yield makes us conclude that this quenching mechanism is not the only one. The observation of CIDNP effects in the dyad in the media of low polarity and the short risetime of triplet state formation indicate a potential role of exciplex in the quenching of the excited state of the dyad.

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Section: Introductionmentioning

confidence: 99%

Spin effects in intramolecular electron transfer in naproxen-N-methylpyrrolidine dyad

Magin

Polyakov

Khramtsova

et al. 2011

Chemical Physics Letters

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“…PET processes are investigated by various techniques including laser flash photolysis, Raman spectroscopy, pulse EPR spectroscopy and spin chemistry [7][8][9]. It is worth noting that in these studies the methods of spin chemistry occupy a special place.…”

Section: Introductionmentioning

confidence: 99%

Spin Chemistry Investigation of Peculiarities of Photoinduced Electron Transfer in Donor–Acceptor Linked System

et al. 2011

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Magin, I.; Polyakov, N.; Khramtsova, E.; Stepanov, A.; Purtov, P.; Leshina, T.... (2011). Spin chemistry investigation of peculiarities of photoinduced electron transfer in donor-acceptor linked system. Applied Magnetic Resonance. 41(2-4):205-220. doi:10.1007/s00723-011-0288-3.Spin chemistry investigation of peculiarities of photoinduced electron transfer in donor-acceptor linked system. Abstract. Photoinduced intramolecular electron transfer (PET) in linked systems, (R,S)-and (S,S)-naproxen-N-methylpyrrolidine dyads, has been studied by means of spin chemistry methods

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“…Conversely, the fluorescence of the sensor R-1 is enhanced by the presence of d-tartaric acid, but for S-1 with d-tartaric acid, the fluorescence is diminished relative to that of the free bisboronic acid. The fluorescence of the binol moiety can be enantioselectively diminished (via a non-emissive exiplex, or by charge-transfer between the analyte and the sensor), [19][20][21] or enantioselectively enhanced (usually by photoinduced electron transfer (PET)). [2,14,15,19,27,29] However, previous reports of chiral discrimination were based solely on a different extent of the spectral change in a single sense (either enhanced or diminished), [19] rather than on the sense of the change.…”

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confidence: 99%