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New bistricyclic aromatic enes (BAEs) with a faster conformational transition were synthesized to improve the fabrication efficiency of BAE-based piezochromic films. Through ultrathin design, our 5-μm-thick BAE-based films can conform to non-planar surfaces and minimize disruption to the original interfacial pressure, improving the precision for mapping interfacial pressure distribution.
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http://dx.doi.org/10.1039/d5cc01054c | DOI Listing |
Macromol Rapid Commun
July 2025
Smart Innovation Program, Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima, Japan.
Bistricyclic aromatic enes (BAEs) are known for their fascinating ability to change color in response to stimuli like heat or mechanical force. However, as this phenomenon is typically limited to the solid state, such as crystals, their incorporation into versatile polymer materials has remained to be investigated. To explore their potential in soft materials, we incorporated a BAE unit into the flexible main chains of poly(methyl acrylate) (PMA) and polyurethane (PU).
View Article and Find Full Text PDFChemistry
September 2025
College of Chemistry and Materials Science, Hebei University, Address No. 180 Wusidong Road, Baoding, Hebei Province, China.
A variety of bifluorenylidene-based bistricyclic aromatic enes (BAEs) and their derivatives have been prepared via the palladium-catalyzed Suzuki coupling/Heck cyclization tandem reaction in one pot. In the new scheme, 2-bromophenyl trifluoromethanesulfonate and similar derivatives were chosen as one of the reaction substrates, which could undergo a tandem Suzuki coupling/Heck cyclization reaction with suitable arylboronic acid ester substrates to afford the expected BAEs and their derivatives. In the newly designed scheme, the raw materials are easier to obtain and can be applied to the synthesis of more BAEs and their derivatives.
View Article and Find Full Text PDFChem Commun (Camb)
May 2025
MOE Laboratory of Bioinorganic and Synthetic Chemistry, GBRCE for Functional Molecular Engineering, LIFM, IGCME, School of Chemistry, Sun Yat-Sen University, Guangzhou 510006, China.
New bistricyclic aromatic enes (BAEs) with a faster conformational transition were synthesized to improve the fabrication efficiency of BAE-based piezochromic films. Through ultrathin design, our 5-μm-thick BAE-based films can conform to non-planar surfaces and minimize disruption to the original interfacial pressure, improving the precision for mapping interfacial pressure distribution.
View Article and Find Full Text PDFMolecules
November 2024
Institute of Advanced Energy, Kyoto University, Gokasho, Uji 611-0011, Japan.
Org Lett
November 2024
College of Chemistry and Materials Science, Hebei University, Baoding, 071002, PR China.
Fluorenylidene-xanthene and related polycyclic systems are typical examples of bistricyclic aromatic enes (BAEs); however, polycyclic systems of fluorenylidene-xanthene are relatively scarce. Here we synthesized a series of novel ladder-type polycyclic systems containing fluorenylidene-xanthene units, differing from the classic Barton's two-fold extrusion reaction. In the new synthetic scheme, the very popular Suzuki reaction was first used to couple the corresponding precursors, then a catalyst-free nucleophilic aromatic substitution reaction between Ar-F and Ar-OH groups in the backbone afforded ladder-type -heteroarenes.
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