表面科学
Online ISSN : 1881-4743
Print ISSN : 0388-5321
ISSN-L : 0388-5321
第36回表面科学学術講演会特集号 [III]
走査トンネル顕微鏡発光分光法による分子間エネルギー移動の実空間計測
今田 裕三輪 邦之今井 みやび河原 祥太木村 謙介金 有洙
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2017 年 38 巻 9 号 p. 455-459

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Energy transfer is an essential process in photosynthesis and various energy-harvesting devices. So far, nanoscale features of energy transfers are unknown because of the limited spatial resolution of conventional methods. We conducted a molecular-level investigation of energy transfers in molecular dimers consisting of a free-base phthalocyanine and magnesium phthalocyanine (H2Pc and MgPc) by scanning tunneling luminescence spectroscopy. Local excitation of an MgPc with the tunneling current of a scanning tunneling microscope give rise to luminescence from a nearby H2Pc as a result of energy transfer. We demonstrate the possibility of a single-molecule valve device for energy transfer, which is revealed by a blinking behavior of energy transfer. Moreover, a back-and-forth energy transfer was observed, where the energy was transferred from the second singlet state (so-called Qy state) of H2Pc to the first singlet state (Q state) of MgPc and finally to the first singlet state (Qx state) of H2Pc.

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この記事はクリエイティブ・コモンズ [表示 - 非営利 4.0 国際]ライセンスの下に提供されています。
https://creativecommons.org/licenses/by-nc/4.0/deed.ja
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