TY - JOUR
T1 - Solvent-Mediated Shape Engineering of Fullerene (C60) Polyhedral Microcrystals
AU - Zheng, Shushu
AU - Cuong, Nguyen Thanh
AU - Okada, Susumu
AU - Xu, Ting
AU - Shen, Wangqiang
AU - Lu, Xing
AU - Tsukagoshi, Kazuhito
N1 - Funding Information:
This work was supported by National Natural Science Foundation of China (NSFC) (Nos. 51472095, 51672093, 51602112, 51772111 and 21771071) and Japan Society for the Promotion of Science (JSPS) (Grant No. JP16F16360). We thank Dr. Takatsugu Wakahara for valuable comments on our experiments and Dr. Yoshitaka Matsushita for single-crystal measurement.
Publisher Copyright:
Copyright © 2018 American Chemical Society.
PY - 2018/10/23
Y1 - 2018/10/23
N2 - n-Heptanol bearing a long hydrocarbon chain is for the first time attempted as poor solvent for reprecipitation of fullerene C60 crystals, which unprecedentedly prompts the selective synthesis of well-faceted parallelepiped, hexagonal plate, cuboctahedron, octahedron C60 crystals, as well as their derivatives with varying degrees of edge- and corner-truncation. Our comprehensive investigations support that morphology evolution is systematically modulated by the solvent proportion of n-heptanol, where increasing the proportion of n-heptanol gradually tunes C60 growth behavior from thermodynamic to kinetic regime, and thus induces a general shape evolution from parallelepiped or truncated parallelepiped, to an intermediate shape like hexagonal plate or truncated octahedron or cuboctahedron, eventually into octahedron. We also prove the existence of n-heptanol molecules as high as 10 wt % inside the final C60 polyhedral crystals, which results in the extraordinarily PL enhancement as well as an obvious blue-shift of PL peaks when compared to that of the solvent-free crystal. Our study provides a fundamental understanding toward the solvent-mediated shape-control process for organic polyhedral crystals, enlightening on solvent-intercalate-induced unique properties.
AB - n-Heptanol bearing a long hydrocarbon chain is for the first time attempted as poor solvent for reprecipitation of fullerene C60 crystals, which unprecedentedly prompts the selective synthesis of well-faceted parallelepiped, hexagonal plate, cuboctahedron, octahedron C60 crystals, as well as their derivatives with varying degrees of edge- and corner-truncation. Our comprehensive investigations support that morphology evolution is systematically modulated by the solvent proportion of n-heptanol, where increasing the proportion of n-heptanol gradually tunes C60 growth behavior from thermodynamic to kinetic regime, and thus induces a general shape evolution from parallelepiped or truncated parallelepiped, to an intermediate shape like hexagonal plate or truncated octahedron or cuboctahedron, eventually into octahedron. We also prove the existence of n-heptanol molecules as high as 10 wt % inside the final C60 polyhedral crystals, which results in the extraordinarily PL enhancement as well as an obvious blue-shift of PL peaks when compared to that of the solvent-free crystal. Our study provides a fundamental understanding toward the solvent-mediated shape-control process for organic polyhedral crystals, enlightening on solvent-intercalate-induced unique properties.
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U2 - 10.1021/acs.chemmater.8b03095
DO - 10.1021/acs.chemmater.8b03095
M3 - Article
AN - SCOPUS:85054971346
VL - 30
SP - 7146
EP - 7153
JO - Chemistry of Materials
JF - Chemistry of Materials
SN - 0897-4756
IS - 20
ER -