Thermosalience
in Macrocycle-Based Soft Crystals via
Anisotropic Deformation of Disilanyl Architecture
Posted on 2020-07-07 - 15:08
We describe here
the preparation of soft crystals using disilanyl
macrocycle C4 possessing four p-phenylenes
circularly connected by four flexible disilane bonds. Single crystals
of C4 exhibited a reversible thermal single-crystal-to-single-crystal
(SCSC) phase transition behavior between two crystal phases accompanied
by remarkable mechanical motion (thermosalient effect), as revealed
by thermal analyses and X-ray diffraction measurements. Detailed structural
analyses implied that flexibility of the parallelogram disilanyl architecture
and molecular packing mode via weak intermolecular interactions facilitated
a concerted structural transformation (parallel crank motion) of macrocycles
in the crystal, thus resulting in the SCSC phase transition accompanied
by anisotropic shrinking/elongation of the cells to induce the thermosalient
effect. This work explores a new area of organosilicon chemistry and
presents the potential utility of disilanyl macrocycles as soft crystals.
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Omoto, Kenichiro; Nakae, Toyotaka; Nishio, Masaki; Yamanoi, Yoshinori; Kasai, Hidetaka; Nishibori, Eiji; et al. (2020). Thermosalience
in Macrocycle-Based Soft Crystals via
Anisotropic Deformation of Disilanyl Architecture. ACS Publications. Collection. https://doi.org/10.1021/jacs.0c03643
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AUTHORS (14)
KO
Kenichiro Omoto
TN
Toyotaka Nakae
MN
Masaki Nishio
YY
Yoshinori Yamanoi
HK
Hidetaka Kasai
EN
Eiji Nishibori
TM
Takaki Mashimo
TS
Tomohiro Seki
HI
Hajime Ito
KN
Kazuki Nakamura
NK
Norihisa Kobayashi
NN
Naofumi Nakayama
HG
Hitoshi Goto
HN
Hiroshi Nishihara
KEYWORDS
C 4phenylenes circularlyAnisotropic Deformationorganosilicon chemistryparallelogram disilanyl architectureX-ray diffraction measurementsDisilanyl Architecturephase transition behaviorcrystal phasesthermosalient effectanalysesSingle crystalsdisilanyl macrocyclesSCSC phase transitiondisilane bondsdisilanyl macrocycle C 4