Results 81 to 90 of about 49,782 (284)

Fused Ring Engineering Induced Topology Control in Covalent Organic Frameworks: Unlocking Promoted Photocatalytic H2O2 Production and Selective Methane Oxidation

Angewandte Chemie, EarlyView.
By modulating the topological structures of two N‐heterocycle‐based covalent organic frameworks, Phen‐TTA with a kgd‐v topology exhibits narrower optical bandgap, lower exciton binding energy, and faster charge‐carrier kinetics compared to O‐TTA with an hcb topology.
Lei Wang, Zhipeng Xie, Xinyi Zeng, Hetao Xu, Mingyue Wang, Jie Yang, Chao Lin, Wandong Xing, Zhengxiao Guo, Xiong Chen   +9 more
wiley   +2 more sources

Recent Advances in Synthesis of Nitrogen-Containing Heterocyclic Compounds Catalyzed by Schiff–Base Complexes

Journal of Chemistry
In recent years, there has been a significant surge in the catalytic utilization of Schiff–base complexes. These compounds prove to be highly effective as homogeneous catalysts in organic syntheses.
Mehdi Fallah-Mehrjardi, Soheil Sayyahi
doaj   +1 more source

A survey of liquid crystalline oxadiazoles

, 2008
We propose a survey of those oxadiazole compounds, which are mesogenic. We will see that they can have bend-shaped molecules, a biaxial nematic phase, or other interesting peculiarities in the nematic and smectic phase.
Sparavigna, Amelia
core   +1 more source

The alpha-effect in cyclic secondary amines: new scaffolds for iminium ion accelerated transformations [PDF]

, 2009
Five-membered secondary amine heterocycles containing an α-heteroatom were prepared and shown to be ineffective as catalysts for the iminium ion catalysed Diels–Alder reaction between cinnamaldehyde and cyclopentadiene.
Cavill, Julie L., Elliott, Richard L., Evans, Gareth, Gibbs, Timothy J. K., Jones, Ian L., Platts, James A, Porzelle, Achim, Tomkinson, Nick   +7 more
core   +1 more source

Biomimetic Polymerization of Tellurocysteine: Breaking the Natural Amino Acid Radioprotection Limitation

Advanced Science, EarlyView.
Inspired by natural amino acid polymer‐melanin systems, this study strategically incorporated tellurocysteine to develop advanced radiation‐shielding materials. This approach transformed the primary interaction mechanism between melanin‐based materials and incident photons from Compton scattering to the photoelectric effect. Tellurocysteine‐polymerized
Wei Chen, Hanjie Zhu, Yue Zhang, Yuqing Qiao, Ruotong Deng, Huaping Xu, Wei Cao   +6 more
wiley   +1 more source

Azetidinylideneketenimines as a Multimodal Synthetic Platform: Coordination Chemistry and Cycloaddition‐Triggered Transformations

Angewandte Chemie, EarlyView.
Cross‐coupling/homologation sequence between a stable three‐membered‐ring carbene and isocyanides enables facile and rapid access to novel methyleneketenimines and the first bis(methyleneketenimine). Reactivity studies gave rise to the first methyleneketenimine‐transition metal complexes, unique multimodal reactivity ranging from CO2, isocyanate ...
Taichi Koike, Keisuke Ito, Shintaro Ishida, Takeaki Iwamoto   +3 more
wiley   +2 more sources

Palladium-catalyzed heteroallylation of unactivated alkenes – synthesis of citalopram [PDF]

, 2013
A palladium-catalyzed difunctionalization of unactivated alkenes with tethered nucleophiles is reported. The versatile reaction occurs with simple allylic halides and can be carried out under air.
Adams, Alcaide, Alexanian, Arai, Balme, Beccalli, Byers, Carruthers, Danishefsky, Deprez, Desai, Doroski, Fries, Fries, Fukuda, Giese, Guo, Hayashi, Hayashi, Heck, Hegedus, Hickman, Hopkins, Ingalls, Jensen, Kang, Keller, Kimura, Koester, Komeyama, Kumar, Larock, Larock, Le Bras, Lei, Li, Lira, Liskin, Liu, Liwosz, Lovering, Lu, Ma, Ma, Ma, Ma, Mai, Manzoni, McDonald, Michael, Minatti, Muñiz, Muñiz, Muñiz, Nadin, Neukom, Newman, Newman, Ney, Ney, Nicolai, Nicolai, Nicolai, Nicolai, Nishimura, Pappo, Ritchie, Rosewall, Schuch, Schultz, Sehnal, Semmelhack, Sibbald, Sibbald, Streuff, Sun, Tietze, Tietze, Trost, Trost, Trost, Tsuji, VanRheenen, Vedantham, Wakabayashi, Weaver, Wolfe, Wolfe, Wolfe, Wolfe, Wu, Xu, Yip, Yip, Yorimitsu, Yorimitsu, Zeni, Zhao, Zhu   +98 more
core   +1 more source

Microorganisms in Chemistry of Nitrogenous Heterocycles [PDF]

, 2017
The monograph is devoted to microbiological methods of obtaining organic compounds from a series of nitrogenous heterocycles (azaarenes, quinolones and saturated nitrogenous heterocycles). It is proposed alternative ways of synthesizing compounds that are difficult to obtain using conventional methods of organic chemistry.
openaire   +1 more source

FeCoNiCuPt High‐Entropy Alloy Boosts Photocatalytic Hydrogen Production on Protonated Graphitic Carbon Nitride

Advanced Science, EarlyView.
In this study, FeCoNiCuPt high‐entropy alloy particles (HEA) are loaded onto protonated g‐C3N4 nanosheets (HCN NSs) to construct HEA/HCN composites through an electrostatic self‐assembly method. Protonation treatment enriches the surface of g‐C3N4 nanosheets with abundant active sites and enhances their interfacial charge separation capability ...
Yunzhu Zang, Jiali Ren, Yanjun Xue, Jian Tian   +3 more
wiley   +1 more source

Isolation and Reactivity of a Square‐Planar Trisamido Silane

Angewandte Chemie, EarlyView.
We report the synthesis and comprehensive characterisation of a square‐planar Si(+IV) hydride supported by an unsymmetric, trianionic and dearomatised N,N,N‐pincer ligand. This system enables element–ligand cooperative reactivity as an alternative to silicon‐centred redox chemistry, illuminating a largely unexplored regime in high‐valent silicon ...
David M. J. Krengel, Xiaobai Wang, Christopher Golz, Regine Herbst‐Irmer, Oliver P. E. Townrow, Malte Fischer   +5 more
wiley   +2 more sources