TY - JOUR
T1 - Transcription of chirality from metal–organic framework to polythiophene
AU - Kitao, Takashi
AU - Nagasaka, Yujiro
AU - Karasawa, Masanobu
AU - Eguchi, Toshiki
AU - Kimizuka, Nobuo
AU - Ishii, Kazuyuki
AU - Yamada, Teppei
AU - Uemura, Takashi
N1 - Funding Information:
This work was supported by the JST, CREST program (JPMJCR1321), and a Grant-in-Aid for Science Research on Innovative Area “Coordination Asymmetry” (JP16H06517) and Young Scientists (JP19K15374) from the Ministry of Education, Culture, Sports, Science and Technology, Government of Japan. The authors thank Dr. Taizo Mori and Dr. Kazuyoshi Watanabe at the University of Tokyo for their help in CD measurements and fruitful discussions. The authors would like to show our appreciation to Ms. Chihoko Fukakusa for preparing the chiral MOF.
Publisher Copyright:
© 2019 American Chemical Society.
PY - 2019/12/18
Y1 - 2019/12/18
N2 - Here, we report an unprecedented chirality transfer from a metal–organic framework (MOF) to a polymer. In this work, unsubstituted polythiophene (PTh) was prepared in the nanochannels of a chiral MOF. Circular dichroism spectroscopy revealed that nanoconfinement of the polymer chains could endow optically inactive PTh with a chiral nature. The thickness of polymer chain assemblies could be controlled by tuning the loading amount of PTh, which resulted in a drastic change in the chiroptical properties. Note that PTh liberated from the host still exhibited chirality even without the chiral support. Remarkably, the recovered PTh presented high thermal stability of chirality up to 250 °C. Our findings show that the encapsulation of the polymer chains in chiral MOFs is a simple and effective methodology not only to express the chirality of polymers but also to elucidate the inter- and intrachain chirality in polymer assemblies.
AB - Here, we report an unprecedented chirality transfer from a metal–organic framework (MOF) to a polymer. In this work, unsubstituted polythiophene (PTh) was prepared in the nanochannels of a chiral MOF. Circular dichroism spectroscopy revealed that nanoconfinement of the polymer chains could endow optically inactive PTh with a chiral nature. The thickness of polymer chain assemblies could be controlled by tuning the loading amount of PTh, which resulted in a drastic change in the chiroptical properties. Note that PTh liberated from the host still exhibited chirality even without the chiral support. Remarkably, the recovered PTh presented high thermal stability of chirality up to 250 °C. Our findings show that the encapsulation of the polymer chains in chiral MOFs is a simple and effective methodology not only to express the chirality of polymers but also to elucidate the inter- and intrachain chirality in polymer assemblies.
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U2 - 10.1021/jacs.9b10880
DO - 10.1021/jacs.9b10880
M3 - Article
C2 - 31786914
AN - SCOPUS:85076253729
VL - 141
SP - 19565
EP - 19569
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
SN - 0002-7863
IS - 50
ER -