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Proton-coupled ener...
Proton-coupled energy transfer in molecular triads
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- Pettersson-Rimgard, Belinda (författare)
- Uppsala universitet,Fysikalisk kemi
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- Tao, Zhen (författare)
- Yale Univ, Dept Chem, New Haven, CT 06520 USA.;Univ Penn, Dept Chem, Philadelphia, PA 19104 USA.
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- Parada, Giovanny A. (författare)
- Yale Univ, Dept Chem, New Haven, CT 06520 USA.;Coll New Jersey, Dept Chem, Ewing, NJ 08628 USA.
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- Cotter, Laura F. (författare)
- Yale Univ, Dept Chem, New Haven, CT 06520 USA.
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- Hammes-Schiffer, Sharon (författare)
- Yale Univ, Dept Chem, New Haven, CT 06520 USA.
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- Mayer, James M. (författare)
- Yale Univ, Dept Chem, New Haven, CT 06520 USA.
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- Hammarström, Leif, 1964- (författare)
- Uppsala universitet,Fysikalisk kemi
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(creator_code:org_t)
- American Association for the Advancement of Science (AAAS), 2022
- 2022
- Engelska.
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Ingår i: Science. - : American Association for the Advancement of Science (AAAS). - 0036-8075 .- 1095-9203. ; 377:6607, s. 742-746
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- We experimentally discovered and theoretically analyzed a photochemical mechanism, which we term proton-coupled energy transfer (PCEnT). A series of anthracene-phenol-pyridine triads formed a local excited anthracene state after light excitation at a wavelength of similar to 400 nanometers (nm), which led to fluorescence around 550 nm from the phenol-pyridine unit. Direct excitation of phenolpyridine would have required similar to 330-nm light, but the coupled proton transfer within the phenolpyridine unit lowered its excited-state energy so that it could accept excitation energy from anthracene. Singlet-singlet energy transfer thus occurred despite the lack of spectral overlap between the anthracene fluorescence and the phenol-pyridine absorption. Moreover, theoretical calculations indicated negligible charge transfer between the anthracene and phenol-pyridine units. We construe PCEnT as an elementary reaction of possible relevance to biological systems and future photonic devices.
Ämnesord
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
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