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A Saturn‐Like Complex Composed of Macrocyclic Oligothiophene and C 60 Fullerene: Structure, Stability, and Photophysical Properties in Solution and the Solid State
Author(s) -
Shimizu Hideyuki,
Park Kyu Hyung,
Otani Hiroyuki,
Aoyagi Shinobu,
Nishinaga Tohru,
Aso Yoshio,
Kim Dongho,
Iyoda Masahiko
Publication year - 2018
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201705565
Subject(s) - van der waals force , fullerene , ultrafast laser spectroscopy , materials science , absorption (acoustics) , spectroscopy , saturn , absorption spectroscopy , crystallography , photochemistry , molecule , chemistry , organic chemistry , physics , quantum mechanics , planet , astrophysics , composite material
A Saturn‐like 1:1 complex composed of macrocyclic oligothiophene E ‐ 8T7A and C 60 fullerene (C 60 ) was synthesized to investigate the interaction between macrocyclic oligothiophenes and C 60 in solution and the solid state. Because the Saturn‐like 1:1 complex E ‐ 8T7A⋅ C 60 is mainly stabilized by van der Waals interactions between C 60 and the sulfur atoms of the E ‐ 8T7A macrocycle, C 60 is rather weakly incorporated inside the macro‐ring in solution. However, in the solid state the Saturn‐like 1:1 complex preferentially formed single crystals or nanostructured polymorphs. Interestingly, X‐ray analysis and theoretical calculations exhibited hindered rotation of C 60 in the Saturn‐like complex due to interactions between C 60 and the sulfur atoms. Furthermore, the photoinduced charge transfer (CT) interaction between E ‐ 8T7A and C 60 in solution was investigated by using femtosecond transient absorption (TA) spectroscopy. The ultrafast TA spectral changes in the photoinduced absorption bands were attributed to the CT process in the Saturn‐like structure.