Mechanically triggered reversible stepwise tricolor switching and thermochromism of anthracene-o -carborane dyad

Chemical Science
Xueyan WuDianzeng Jia

Abstract

A novel single organic molecule-carborane conjugate, CAN, was synthesized in a high yield via a modified nickel-catalyzed cross-coupling reaction incorporating an anthracene unit and an o-carborane moiety. CAN exhibits multiple functions of tricolored mechanochromism and mechanically triggered thermochromism. The fluorescence could be switched from blue to bright yellow then to pink by grinding. The robust and reversible thermochromic process was triggered by the mechanical force. The locally excited (LE) state emission, intermolecular excimer formation and twisted intermolecular charge transfer (TICT) are the primary origins of this tricolor switching property. High temperature sensitivity of the heavily ground CAN powders contribute to the mechanical force induced TICT emission enhancement and color switching.

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Citations

Nov 17, 2019·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Seonah KimKang Mun Lee
May 28, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Hyunhee SoKang Mun Lee
Jan 23, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Ke CaoJunxiao Yang
Mar 12, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Justo Cabrera-GonzálezRosario Núñez
Jan 31, 2021·Nanoscale·Mingzhe NieXuemin Du
Feb 13, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Mingi KimKang Mun Lee
Apr 4, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Seok Ho LeeKang Mun Lee
May 20, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Jiaxin LiHong Yan
Jun 18, 2021·Advanced Materials·Jing ZhangBen Zhong Tang
Jun 20, 2021·Chemistry, an Asian Journal·Tsutomu Ishi-ITaisuke Matsumoto
May 11, 2019·The Journal of Organic Chemistry·Sheng DingJianzhang Zhao

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Methods Mentioned

BETA
Fluorescence
X-ray
Infrared Spectroscopy
column chromatography

Software Mentioned

Gaussian

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