title: Direct observation of structural properties and fluorescent trapping sites in macrocyclic porphyrin arrays at the single-molecule level.
abstract: By utilizing single-molecule defocused wide-field fluorescence microscopy, we have investigated the molecular structural properties such as transition dipole moment orientations and the angular relationship among chromophores, as well as structural distortions and flexibilities depending on the ring size, in a series of cyclic porphyrin arrays bearing close likeness in overall architectures to the LH2 complexes in purple bacterial photosynthetic systems. Furthermore, comparing the experimental results with molecular dynamics simulations, we ascertained site selection for fluorescent trapping sites. Collectively, these experimental and computational results provide the basis for structure-property relationships and energy hopping/emitting processes in an important class of artificial light-harvesting molecular systems widely used in molecular electronics technology.
authors.affiliation: Department of Chemistry, Yonsei University, 50, Yonsei-ro, Seodaemun-gu, Seoul, 120-749, Korea. esim@yonsei.ac.kr dongho@yonsei.ac.kr.
authors.forename: Sujin
authors.initials: S
authors.lastname: Ham
authors.affiliation: Department of Chemistry, Yonsei University, 50, Yonsei-ro, Seodaemun-gu, Seoul, 120-749, Korea. esim@yonsei.ac.kr dongho@yonsei.ac.kr.
authors.forename: Ji-Eun
authors.initials: JE
authors.lastname: Lee
authors.affiliation: Department of Chemistry, Yonsei University, 50, Yonsei-ro, Seodaemun-gu, Seoul, 120-749, Korea. esim@yonsei.ac.kr dongho@yonsei.ac.kr.
authors.forename: Suhwan
authors.initials: S
authors.lastname: Song
authors.affiliation: Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan. osuka@kuchem.kyoto-u.ac.jp.
authors.forename: Xiaobin
authors.initials: X
authors.lastname: Peng
authors.affiliation: Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan. osuka@kuchem.kyoto-u.ac.jp.
authors.forename: Takaaki
authors.initials: T
authors.lastname: Hori
authors.affiliation: Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan. osuka@kuchem.kyoto-u.ac.jp.
authors.forename: Naoki
authors.initials: N
authors.lastname: Aratani
authors.affiliation: Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan. osuka@kuchem.kyoto-u.ac.jp.
authors.forename: Atsuhiro
authors.initials: A
authors.lastname: Osuka
authors.affiliation: Department of Chemistry, Yonsei University, 50, Yonsei-ro, Seodaemun-gu, Seoul, 120-749, Korea. esim@yonsei.ac.kr dongho@yonsei.ac.kr.
authors.forename: Eunji
authors.initials: E
authors.lastname: Sim
authors.affiliation: Department of Chemistry, Yonsei University, 50, Yonsei-ro, Seodaemun-gu, Seoul, 120-749, Korea. esim@yonsei.ac.kr dongho@yonsei.ac.kr.
authors.forename: Dongho
authors.initials: D
authors.lastname: Kim