Organometallic compounds can undergo intramolecular C—H activation to form cyclometallic species，which can then undergo selective ring-opening to enable a “through space” migration of the metal atom within the molecule. Compared to the widely studied heteroatom-directed C—H activation reactions，this process is more complex and difficult to control. Over the past decade，significant progress has been made in this area，providing powerful new tools for the functionalization of remote C—H bonds. The aryl-to-vinylic 1，4-palladium migration represents one of the most significant research area in this field. Although it faces challenges，including the migration of palladium to the thermodynamically less stable vinyl position and the inherent diverse reactivity of alkenes，it provides a novel strategy for the highly stereoselective synthesis of polysubstituted alkenes. Owing to its considerable academic and practical significance，this method has garnered widespread attention.This review summarizes the key mechanisms of aryl-to-vinylic 1，4-palladium migration，various transformation reactions，and potential synthetic applications. Finally，the challenges encountered in this field and prospects for future development are discussed.

In recent decades，along with the improvement of peptide synthetic strategies，the development about bicyclic peptides have been accelerated vigorously，and as a result，more and more bicyclic peptide compounds have entered the clinical trial stage. Through high-throughput screening of peptide compound libraries，the efficiency of obtaining target structures has been greatly increased，further promoting the development of the bicyclic peptide field. Compared with linear and monocyclic peptides，bicyclic peptides have much larger structures and greater structural rigidity，which results in higher affinity and selectivity of the binding to their targets. The absence of terminally free amine and carboxyl groups can also increase the stability of bicyclic peptides against proteolytic enzymes significantly. In addition，the facility of bicyclic peptides to cross cell membranes contributes the improved bioavailability. With the sustainable development and wide application of synthetic technologies，more and more potential bicyclic peptides have been developed successively，laying the foundation for the researches of bicyclic peptide drugs. However，in terms of druggability，there are still many limitations in solubility，conformational stability and in vivo activity，which are urgently need to be solved by means of pharmaceutical preparation and chemically structural modification. This review mainly focuses on the chemical preparation strategies of bicyclic peptides and their applications in drug discovery in recent years.

Cellulose nanocrystals（CNCs）are rod-like nanomaterials with high crystallinity obtained from natural cellulose. CNCs suspensions can form iridescent films with chiral nematic structure through evaporation-induced self-assembly（EISA），showing unique optical properties and presenting specific structural colors，which has great application potential in the fields of anti-counterfeiting，sensing，optoelectronics and so on. Due to the abundant，green and renewable feedstock，CNCs has become the first choice of the new chiral materials. In this paper，the formation mechanism，structure and optical properties of CNCs chiral liquid crystals are introduced，the preparation methods of CNCs chiral liquid crystals which are typical at home and abroad in recent years are reviewed，and the structural colors and regulation methods of CNCs chiral liquid crystals are discussed. The application progress of CNCs chiral liquid crystals in the fields of anti-counterfeiting materials，template materials，other functional materials and biomedicine is also summarized. Finally，the challenges and research prospects of CNCs chiral liquid crystals are addressed.

In recent years，covalent organic frameworks（COFs）have emerged as focal points in the research of membrane materials. Distinguished by their distinctive porous structures and structural versatility，COFs offer a promising avenue for advancement in membrane applications compared to conventional polymeric materials. This article delves into diverse interfacial systems，systematically detailing the methodologies for fabricating high-performance COF membranes via interfacial polymerization. The mechanisms underlying membrane formation across various interfacial systems and the strategies for precisely controlling the membrane structure will be elucidated. Furthermore，the intricate relationship between the membrane structure and application performance will be summarized. The challenges and perspectives in this field will be highlighted in the last part of this review.

The rapid development of biodegradable plastics manufactured by chemical and biological processes，including the use of enzymes and microorganisms，makes it possible to reduce "white pollution" in specific areas by substituting biodegradable plastics with non-biodegradable ones. One type of one-dimensional material is fiber material，which is created by processing regular material in a particular way. The use of biodegradable materials in textiles，bio-medicine，and fiber-reinforced composites is extremely important. This paper reviews the biodegradable mechanism of materials，methods of manufacturing for biodegradable synthetic fiber，research status，and composite materials made of biodegradable synthetic fiber. It also describes the spinning molding techniques of materials and explains the relationship that some biodegradable plastics have with conventional fiber molding techniques. The challenges and prospects in the development of biodegradable synthetic fiber materials are also pointed out.

With the improvement of living standard and heightened awareness of environmental protection，renewable and environmentally friendly cellulose materials have attracted much attention in the field of daytime radiative cooling due to their high mid-infrared emissivity and the advantages of tunability of hierarchical structure. In this review，the classification，advantages/disadvantages of radiative cooling materials，the principles of radiative cooling，and the factors influencing their performance are introduced. The classification，state of the art as well as radiative cooling properties of cellulose-based daytime radiative cooling materials are elaborated. The recent progress in the four main application areas including building thermal management，personal thermal management，photovoltaics and low-temperature storage/transportation are summarized. Finally，the existing challenges in the current research are discussed and the future development in this field is also envisaged.

Human exhaled air has a close relationship with diseases，among which ammonia becomes a respiratory marker for diseases such as kidney disease. Traditional exhaled gas detection methods are mainly detected by gas chromatography，but the instrument is bulky and complex in operation. Emerging ammonia sensors，however，are garnering significant attention due to their portability，ease of integration，miniaturization，low cost，and simplicity of operation. This review systematically describes the working mechanism of ammonia gas sensors，sensor types，and common ammonia sensing materials. At the same time，it introduces the advantages of sensor array electronic nose technology over a single sensor，and puts forward the application research of ammonia sensors and electronic noses in diseases，aiming at the existing problems and prospects of ammonia gas sensors.

Li-S batteries have great application prospects because of their extremely high capacity and energy density. However，the instability and insulation of polysulfides（LiPSs）seriously hinder their further application. In order to solve the problem of slow reaction kinetics in Li-S batteries，it is urgent to explore efficient catalysts to accelerate the sulfur redox. In the case，transition metals with unique and excellent catalytic properties are considered as potential catalysts for Li-S battery. However，differences in the structure and properties of transition metals will lead to different catalytic mechanisms. Therefore，this work divides five types of transition metals（ferrous metals，conventional non-ferrous metals，precious metals，rare refractory metals，and rare earth metals）based on metal characteristics. Then，the catalytic mechanisms of transition metal catalysts were analyzed，including adsorption，accelerating electron transfer，reducing activation energy and co-catalysis. Besides，the research progress of various metals used in Li-S batteries was reviewed，and the catalytic mechanisms of different types of metals were clarified. Four optimization strategies were proposed： nanostructured design，doping-modification，alloying and external cladding，in order to provide certain references for the design of Li-S battery catalysts.

Zinc-iodine batteries have attracted widespread attention as a novel green，low-cost，and highly safe electrochemical energy storage technology. Its basic principle is to use the electrochemical reaction between zinc and iodine to store and release energy. However，the low electronic conductivity，shuttle effect，and high solubility of iodine limit the practical application of zinc-iodine batteries. This work provides a systematic review of the research progress on carbon materials used in the cathode of zinc-iodine batteries，with a focus on several commonly used carbon materials，such as carbon nanotubes，graphene，activated carbon，biomass-derived carbon，and other porous carbon materials. Owing to their excellent conductivity，high specific surface area，and good chemical stability，these carbon materials can not only effectively adsorb and immobilize iodine molecules，preventing iodine loss and the shuttle effect，but also promote iodine redox reactions by regulating the pore structure and surface chemical properties，thereby improving the specific capacity and cycling stability of the battery. Additionally，we put forward the challenges and issues faced by carbon materials in the practical application of zinc-iodine batteries，including how to further enhance iodine adsorption capability and improve the structural stability of the electrode. Accordingly，several potential future research directions are proposed with a view to further improving the electrochemical performance and reducing the manufacturing cost，thus laying the foundation for advancing the development and application of this emerging battery technology.

Lithium metal batteries（LMBs）have emerged as a focal point for next-generation battery technology research due to their high energy density. However，the commercialization of lithium-metal batteries is hindered by a series of challenges，including lithium dendrite formation，volumetric expansion，and the rupture of the solid electrolyte interphase（SEI）. Ionic liquids（ILs）are emerging as key candidate materials to address these issues due to their unique physical and chemical properties. Despite the significant potential of ionic liquids in lithium-metal batteries，several pressing issues，such as high costs and high viscosity，need to be addressed. Future research should focus on developing new low-cost，high-performance ionic liquids and further understanding their mechanisms in batteries. Additionally，combining advanced characterization techniques and theoretical calculations to explore the dynamic behavior and interfacial phenomena of ionic liquids in lithium metal batteries will help advance their practical applications. This review summarizes the safety issues involved in the research and development of lithium metal batteries，as well as the research progress of ionic liquids in their application as electrolytes and solid electrolytes in lithium metal batteries.