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Smart responsive organic emitters, which exhibit tunable emission properties in response to external stimuli, can serve as a new generation of intelligent optoelectronic materials because of their versatile applications, such as multicolor displays, information encryption, visual sensing, and matter detection. In recent years, significant advancements have been made in the development of smart responsive organic emitters. However, there is still a lack of a systematic review that provides a comprehensive insight into smart responsive organic emitters from the perspectives of intrinsic mechanisms and versatile applications. Hence, this review concentrates on analyzing the intrinsic mechanisms, which can clarify the relationships between material systems and tunable emission behaviors. This process can provide helpful design principles for smart responsive organic emitters. Furthermore, versatile smart applications have been highlighted to deepen the understanding of the practical values of such smart responsive emitters. This work summarizes the state‐of‐the‐art progress of smart responsive emitters and highlights the existing challenges and future development directions. It aims to provide inspiration and guidelines for the construction of novel smart responsive organic emitters, thereby broadening and stimulating their prominent applications in various fields such as electronic information and flexible electronics. [ABSTRACT FROM AUTHOR]

Covalent organic frameworks (COFs) are attractive porous crystalline materials with extremely high stability, easy functionalization, and open channels, which are expected to be unique ion conductors/transporters in lithium ion batteries (LIBs). Despite recent advances, low ion conductivity and low transference number, resulting in low charging/discharging rate, low energy density, and short battery life, are the main issues that limit their direct application as solid electrolytes in LIBs. Here, we designed and synthesized a novel polyimide COF, namely, TAPA-PDI-COF, with abundant C=O groups, which has been successfully employed as high-performance solid electrolytes by doping TAPA-PDI-COF and succinonitrile (SN). Both the well-defined nanochannels of COFs and SN confined in the well-aligned channels restricted the free migration of anions, while C=O on COFs and CN groups of SN enhanced Li+ transport, thus achieving a high ion conductivity of 0.102 mS cm−1 at 80 °C and a high lithium-ion transference number of 0.855 at room temperature. According to density functional theory (DFT) calculations, Li-ion migration mainly adopted in-plane transport rather than the axial pathway, which may be due to the shorter hopping distances in the planar pathway. The results suggest an effective strategy for the design and development of all-solid-state ionic conductors for achieving high-performance LIBs. [ABSTRACT FROM AUTHOR]

Camouflage skin holds immense potential for a variety of advanced applications, such as artificial intelligence, soft robotics, and flexible/wearable electronics. Currently, most existing materials for constructing camouflage skin are mainly based on inorganic materials with an inverse opal scaffold, which significantly limits their further development because of the poor mechanical properties and environmental instability. Inspired by rana slvaticas, a new type of camouflage skin based on one‐dimentional (1D) photonic crystal (PC) gel is designed and synthesized, which combines the advantages of 1D PC structures with 3D flexible gels in a single skin device. Taking advantage of the unique structures, the resulting camouflage skins demonstrated attractive properties, including excellent mechanical performance, self‐adaptive camouflage capabilities, and long‐term stability in ambient conditions. Specifically, the camouflage skin can quickly recognize and match the background by modulating the optical signals of external stimuli. The synergistic effect of the glycerol, the dodecyl glycerol itaconate (DGI), and the nano‐space structures altogether contribute to the outstanding long‐term environmental stability of the camouflage skin. Overall, by combining the bio‐inspired concept and molecular engineering strategy, camouflage skin based on PC gels is synthesized, which greatly enriched the application and development in the smart skins field. [ABSTRACT FROM AUTHOR]