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About the Cover:On the front cover: O-hydroxyphenyl substituted p-quinone methides (p-QMs) not only maintain the high reactivity of p-QMs, but also have more reactive and activation sites owing to the introduction of hydroxyl group. This review by Shi, Zhang and coworkers summarizes the catalytic asymmetric reactions involving O-hydroxyphenyl substituted p-QMs, which include [4+n] cycloadditions and 1,6-additions, thus highlighting their applications in the synthesis of chiral oxygen-containing heterocycles and arylmethanes. Moreover, the remaining challenges have been pointed out to provide a new horizon for this research area. [Shi, Feng et al. on page 793-808.]
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About the Cover:On the inside front cover: Rare earth ion Tb3+ doped β-KMg(PO3)3 phosphors exhibit high efficiency photoluminescence and emit bright green light under the stimulation of mechanical stress. Defects and flexible structure play a significant role in the process of mechanoluminescence. This study broadens the development of green luminescent materials. [Chen, Huimin et al. on page 771-776.]
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About the Cover:On the back cover: We demonstrated a new and feasible strategy for photosensitive and temperature-controlled moisture responsive wrinkles by involving a copolymer containing anthracene and N-isopropylacrylamide into a bilayer wrinkling system, which may find potential applications in moisture sensing, smart display or smart windows. [Jiang, Xuesong et al. on page 749-756.]
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