TY - JOUR
T1 - Tetrameric and Hexameric Porphyrin Nanorings
T2 - Template Synthesis and Photophysical Properties
AU - Maeda, Chihiro
AU - Toyama, Shoki
AU - Okada, Naoki
AU - Takaishi, Kazuto
AU - Kang, Seongsoo
AU - Kim, Dongho
AU - Ema, Tadashi
N1 - Funding Information:
This work was supported by JSPS KAKENHI (Grant Number 15K13745) and Izumi Science and Technology Foundation. The work at Yonsei University was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2020R1A5A1019141).
PY - 2020/9/16
Y1 - 2020/9/16
N2 - Hexameric and tetrameric porphyrin nanorings, Z6T6 and Z4T4, were synthesized in 53% and 14% yields, respectively, by the Sonogashira-type self-oligomerization of porphyrin monomer 1 using hexadentate template T6 and tetrapyridylporphyrin template T4. Template-free nanorings Z6 and Z4 were also prepared. The femtosecond transient absorption measurements revealed fast excitation energy hopping (EEH) along these nanorings with hopping rates of 2-5 ps. Treatment of Z6 with chiral template CT6 gave Z6CT6 showing circular dichroism (CD) and circularly polarized luminescence (CPL) in the absorption and fluorescence regions of Z6, respectively, which indicates chirality transfer from CT6 to Z6.
AB - Hexameric and tetrameric porphyrin nanorings, Z6T6 and Z4T4, were synthesized in 53% and 14% yields, respectively, by the Sonogashira-type self-oligomerization of porphyrin monomer 1 using hexadentate template T6 and tetrapyridylporphyrin template T4. Template-free nanorings Z6 and Z4 were also prepared. The femtosecond transient absorption measurements revealed fast excitation energy hopping (EEH) along these nanorings with hopping rates of 2-5 ps. Treatment of Z6 with chiral template CT6 gave Z6CT6 showing circular dichroism (CD) and circularly polarized luminescence (CPL) in the absorption and fluorescence regions of Z6, respectively, which indicates chirality transfer from CT6 to Z6.
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U2 - 10.1021/jacs.0c07707
DO - 10.1021/jacs.0c07707
M3 - Article
C2 - 32847356
AN - SCOPUS:85091127217
VL - 142
SP - 15661
EP - 15666
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
SN - 0002-7863
IS - 37
ER -