Molecular magneto-ionic proton sensor in solid-state proton battery

Recognition Site Density Regulation of Schiff Base Organic Porous Polymers for Ultrasensitive and Specific Fluorescence Sensing toward Gaseous DCP

Due to the severe interference from analogues such as hydrochloric acid, it is of great significance to establish a highly reliable technique to enhance the discrimination ability toward diethyl chlorophosphate (DCP). Here, based on the electrophilicity of DCP, a series of zero-background fluorescence Schiff base materials with different densities of C═N bonds as recognition sites were designed and synthesized by modulating the chain length. It is found that the increase of the C═N bond density and the specific surface area could improve the collision efficiency with DCP, thereby improving the response speed. When the density of C═N bonds is 3.86 × 1021/cm3 and the specific surface area is 128.5 m2/g, DFDBA-POP demonstrated a more superior sensing performance toward the target analyte, including the ability to detect gaseous DCP, a rapid response (1 s), and superior selectivity even in the presence of 15 kinds of interferents including the very similar hydrochloric acid. Moreover, the practicality of DFDBA-POP was further verified by a DFDBA-POP solid-state sensor, which is capable of specifically identifying gaseous DCP. The present nonfluorescent Schiff base materials design and modulation strategy would open up a new gate for the rational design of high-performance fluorescent materials to detect and discriminate trace hazardous substances with similar structures and properties.

Role of Hydrogen Transfer in Functional Molecular Materials and Devices

Hydrogen transfer is a fundamental chemical process critical to the design and application of organic molecules and functional devices. By uncovering the dynamic interactions between atoms within molecules, hydrogen transfer research offers innovative pathways for creating advanced functional materials and devices. These advancements have driven progress in areas such as optoelectronics, molecular switches, and bioimaging. This review explores the various forms of hydrogen transfer, including hydrogen atom, proton, and hydride transfer, highlighting their mechanisms and key reactions. It also examines the integration of these processes into molecular devices, including single-molecule systems, molecular films, and organic frameworks. Future directions emphasize precise control of hydrogen transfer pathways, development of highly selective and efficient reaction systems, and the design of robust devices based on these processes. These efforts aim to enhance device performance and broaden applications in intelligent materials, integrated functions, and information technology.

Chiral Molecular Magnet Superstructures with Light Control

Chiral magnets are crucial for magneto-optical coupling to advance spin-optoelectronics. Chirality breaks spatial inversion symmetry, while magnetism breaks time-reversal symmetry. However, understanding and controlling the interplay between chirality and magnetism remain fundamental challenges. Here we report chiral helical magnetic superstructures with spin tunability and the Faraday effect by circularly polarized photons. By controlling the supramolecular assembly of chiral molecules, we demonstrate the superstructure transition of molecular magnets from vortex to helical nanowire structures through circular dichroism and electron microscopy. The chiral magnets exhibit circularly polarized light controlled ferromagnetic magnetic resonance and magnetic anisotropy. The enhancement of the Faraday effect by chiral structures is comparable to the effect produced by a 3 kOe magnetic field. This approach shows potential for low-power magneto-optical devices, and additionally, it lays the groundwork for chiral light-related noncontact optical magnetics.