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Exclusive occurrence of photoinduced energy transfer and switching of its direction by rectangular π-extension of nanographenes

Tutkimustuotosvertaisarvioitu

Standard

Exclusive occurrence of photoinduced energy transfer and switching of its direction by rectangular π-extension of nanographenes. / Umeyama, Tomokazu; Hanaoka, Takuma; Yamada, Hiroki; Namura, Yuki; Mizuno, Satoshi; Ohara, Tomoya; Baek, Jinseok; Park, Jaehong; Takano, Yuta; Stranius, Kati; Tkachenko, Nikolai V.; Imahori, Hiroshi.

julkaisussa: Chemical Science, Vuosikerta 10, Nro 27, 2019, s. 6642-6650.

Tutkimustuotosvertaisarvioitu

Harvard

Umeyama, T, Hanaoka, T, Yamada, H, Namura, Y, Mizuno, S, Ohara, T, Baek, J, Park, J, Takano, Y, Stranius, K, Tkachenko, NV & Imahori, H 2019, 'Exclusive occurrence of photoinduced energy transfer and switching of its direction by rectangular π-extension of nanographenes', Chemical Science, Vuosikerta. 10, Nro 27, Sivut 6642-6650. https://doi.org/10.1039/c9sc01538h

APA

Umeyama, T., Hanaoka, T., Yamada, H., Namura, Y., Mizuno, S., Ohara, T., ... Imahori, H. (2019). Exclusive occurrence of photoinduced energy transfer and switching of its direction by rectangular π-extension of nanographenes. Chemical Science, 10(27), 6642-6650. https://doi.org/10.1039/c9sc01538h

Vancouver

Umeyama T, Hanaoka T, Yamada H, Namura Y, Mizuno S, Ohara T et al. Exclusive occurrence of photoinduced energy transfer and switching of its direction by rectangular π-extension of nanographenes. Chemical Science. 2019;10(27):6642-6650. https://doi.org/10.1039/c9sc01538h

Author

Umeyama, Tomokazu ; Hanaoka, Takuma ; Yamada, Hiroki ; Namura, Yuki ; Mizuno, Satoshi ; Ohara, Tomoya ; Baek, Jinseok ; Park, Jaehong ; Takano, Yuta ; Stranius, Kati ; Tkachenko, Nikolai V. ; Imahori, Hiroshi. / Exclusive occurrence of photoinduced energy transfer and switching of its direction by rectangular π-extension of nanographenes. Julkaisussa: Chemical Science. 2019 ; Vuosikerta 10, Nro 27. Sivut 6642-6650.

Bibtex - Lataa

@article{970044e80529444196c4e02bf1a14287,
title = "Exclusive occurrence of photoinduced energy transfer and switching of its direction by rectangular π-extension of nanographenes",
abstract = "As structure defined cutouts of the graphene lattice, nanographene molecules have gained plenty of attention because of their high potential for versatile applications in organic electronics and energy conversion devices and as ideal model systems for the better understanding of intrinsic structure-property correlations of graphenes. In this study, well-defined nanographenes with sp2 carbon networks of different sizes, hexa-peri-hexabenzocoronene (HBC) and its rectangularly π-extended version, a short graphene nanoribbon (GNR), have been covalently functionalized with photoactive porphyrin molecules. On the basis of their spectroscopic studies, the photodynamics of the porphyrin-linked nanographenes was found to be influenced substantially by the size of the nanographenes. Photoexcitation of the porphyrin-HBC linked system led to exclusive energy transfer (EnT) from the first singlet excited state (S1) of the nanographene to the porphyrin, whereas opposite selective EnT occurred from the first and second singlet excited states (S1 and S2) of the porphyrin to the nanographene in the porphyrin-GNR linked system. In particular, ultrafast efficient EnTs from both the S2 and S1 states of the porphyrin to GNR mimic the corresponding ultrafast EnTs from the S2 and S1 states of carotenoids to chlorophylls in light-harvesting systems of natural photosynthesis. Such unique photophysical properties will be useful for the rational design of carbon-based photofunctional nanomaterials for optoelectronics and solar energy conversion devices.",
author = "Tomokazu Umeyama and Takuma Hanaoka and Hiroki Yamada and Yuki Namura and Satoshi Mizuno and Tomoya Ohara and Jinseok Baek and Jaehong Park and Yuta Takano and Kati Stranius and Tkachenko, {Nikolai V.} and Hiroshi Imahori",
year = "2019",
doi = "10.1039/c9sc01538h",
language = "English",
volume = "10",
pages = "6642--6650",
journal = "Chemical Science",
issn = "2041-6520",
publisher = "Royal Society of Chemistry",
number = "27",

}

RIS (suitable for import to EndNote) - Lataa

TY - JOUR

T1 - Exclusive occurrence of photoinduced energy transfer and switching of its direction by rectangular π-extension of nanographenes

AU - Umeyama, Tomokazu

AU - Hanaoka, Takuma

AU - Yamada, Hiroki

AU - Namura, Yuki

AU - Mizuno, Satoshi

AU - Ohara, Tomoya

AU - Baek, Jinseok

AU - Park, Jaehong

AU - Takano, Yuta

AU - Stranius, Kati

AU - Tkachenko, Nikolai V.

AU - Imahori, Hiroshi

PY - 2019

Y1 - 2019

N2 - As structure defined cutouts of the graphene lattice, nanographene molecules have gained plenty of attention because of their high potential for versatile applications in organic electronics and energy conversion devices and as ideal model systems for the better understanding of intrinsic structure-property correlations of graphenes. In this study, well-defined nanographenes with sp2 carbon networks of different sizes, hexa-peri-hexabenzocoronene (HBC) and its rectangularly π-extended version, a short graphene nanoribbon (GNR), have been covalently functionalized with photoactive porphyrin molecules. On the basis of their spectroscopic studies, the photodynamics of the porphyrin-linked nanographenes was found to be influenced substantially by the size of the nanographenes. Photoexcitation of the porphyrin-HBC linked system led to exclusive energy transfer (EnT) from the first singlet excited state (S1) of the nanographene to the porphyrin, whereas opposite selective EnT occurred from the first and second singlet excited states (S1 and S2) of the porphyrin to the nanographene in the porphyrin-GNR linked system. In particular, ultrafast efficient EnTs from both the S2 and S1 states of the porphyrin to GNR mimic the corresponding ultrafast EnTs from the S2 and S1 states of carotenoids to chlorophylls in light-harvesting systems of natural photosynthesis. Such unique photophysical properties will be useful for the rational design of carbon-based photofunctional nanomaterials for optoelectronics and solar energy conversion devices.

AB - As structure defined cutouts of the graphene lattice, nanographene molecules have gained plenty of attention because of their high potential for versatile applications in organic electronics and energy conversion devices and as ideal model systems for the better understanding of intrinsic structure-property correlations of graphenes. In this study, well-defined nanographenes with sp2 carbon networks of different sizes, hexa-peri-hexabenzocoronene (HBC) and its rectangularly π-extended version, a short graphene nanoribbon (GNR), have been covalently functionalized with photoactive porphyrin molecules. On the basis of their spectroscopic studies, the photodynamics of the porphyrin-linked nanographenes was found to be influenced substantially by the size of the nanographenes. Photoexcitation of the porphyrin-HBC linked system led to exclusive energy transfer (EnT) from the first singlet excited state (S1) of the nanographene to the porphyrin, whereas opposite selective EnT occurred from the first and second singlet excited states (S1 and S2) of the porphyrin to the nanographene in the porphyrin-GNR linked system. In particular, ultrafast efficient EnTs from both the S2 and S1 states of the porphyrin to GNR mimic the corresponding ultrafast EnTs from the S2 and S1 states of carotenoids to chlorophylls in light-harvesting systems of natural photosynthesis. Such unique photophysical properties will be useful for the rational design of carbon-based photofunctional nanomaterials for optoelectronics and solar energy conversion devices.

U2 - 10.1039/c9sc01538h

DO - 10.1039/c9sc01538h

M3 - Article

VL - 10

SP - 6642

EP - 6650

JO - Chemical Science

JF - Chemical Science

SN - 2041-6520

IS - 27

ER -