101097-05-6Relevant articles and documents
Tetraarylsuccinonitriles as mechanochromophores to generate highly stable luminescent carbon-centered radicals
Sumi, Toshikazu,Goseki, Raita,Otsuka, Hideyuki
, p. 11885 - 11888 (2017)
This communication reports on the design and synthesis of mechanochromophores with a dynamic covalent system composed of a tetraarylsuccinonitrile skeleton that generate a metastable organic luminescent carbon radical. The mechanically generated radical species showed pink color and yellow light emission under UV irradiation. Unusually high stability of the luminescent carbon-centered radicals was also observed in a polymer system.
Thermo- and Mechanochromic Camouflage and Self-Healing in Biomimetic Soft Actuators Based on Liquid Crystal Elastomers
Bisoyi, Hari Krishna,Huang, Yinliang,Li, Quan,Liu, Zhongcheng,Wang, Meng,Yang, Hong
, (2022/01/04)
In nature, many mysterious creatures capable of deformation camouflage, color camouflage, and self-healing have inspired scientists to develop various biomimetic soft robots. However, the systematic integration of all the above functionalities into a single soft actuator system still remains a challenge. Here we chemically introduce a multi-stimuli-responsive tetraarylsuccinonitrile (TASN) chromophore into a liquid crystal elastomer (LCE) network through a facile thiol-ene photoaddition method. The obtained TASN-LCE soft actuators not only exhibit reversible shape-morphing and reversible color-changing behavior in response to heat and mechanical compression, but also show excellent self-healing, reprogramming and recycling characteristics. We hope that such a TASN-LCE actuator system endowed with dynamic distortion, thermo- and mechano-chromic camouflage, and self-healing functionalities would pave the way for further development of multifunctional biomimetic soft robotic devices.
RADICAL BASED MECHANOCHROMIC MONOMERS AND SELF-REPORTING POLYMERS
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Paragraph 0177; 0187; 0189; 0191, (2021/10/05)
The present invention relates to a radical-based mechanochromic monomer which changes color by mechanical stimuli such as pressing, bending, tearing, tensile and the like, and can be usefully used as a physical stimulus-sensitive sensor, a self-reporting smart polymer material, or the like by utilizing a polymer prepared from the monomer according to the present invention.
Enantioselective Construction of Single and Vicinal All-Carbon Quaternary Stereocenters through Ion-Pair-Catalyzed 1,6-Conjugate Addition
Zhu, Yasheng,Wang, Hongliang,Wang, Gang,Wang, Zehua,Liu, Zhaopeng,Liu, Lei
supporting information, p. 7248 - 7253 (2021/09/14)
An asymmetric 1,6-conjugate addition to presynthesized δ-aryl-δ-cyano-disubstituted para-quinone methides through bifunctional phosphonium-amide-promoted ion-pair catalysis for acyclic all-carbon quaternary stereocenter construction has been described. Both acyclic and cyclic 1,3-dicarbonyls participate in the asymmetric alkylation reaction, furnishing a wide array of diarylmethanes bearing a single acyclic quaternary carbon stereocenter or vicinal cyclic and acyclic quaternary carbon stereocenters with high efficiency and excellent stereoselectivity. Computational studies elucidate the origin of the enantioselectivity.
Synthesis of Chiral Triarylmethanes Bearing All-Carbon Quaternary Stereocenters: Catalytic Asymmetric Oxidative Cross-Coupling of 2,2-Diarylacetonitriles and (Hetero)arenes
Wang, Zehua,Zhu, Yasheng,Pan, Xiaoguang,Wang, Gang,Liu, Lei
, p. 3053 - 3057 (2020/02/05)
A direct and enantioselective oxidative cross-coupling of racemic 2,2-diarylacetonitriles with electron-rich (hetero)arenes has been described, which allows for efficient construction of triarylmethanes bearing all-carbon quaternary stereocenters with excellent chemo- and enantioselectivity. The reaction has an excellent functional group tolerance, and exhibits a broad scope with respect to both 2,2-diarylacetonitrile and (hetero)arene components. The rich chemistry of the cyano group allows for facile synthesis of other valuable chiral triarylmethanes bearing all-carbon quaternary centers that are otherwise difficult to access.