Results 141 to 150 of about 60,247 (222)

Molecularly Regulated Dynamic Interfaces in 3D/2D Perovskites Enabled by Functional Pyridinium Ionic Liquids

Small, EarlyView.
1‐butyl‐4‐methylpyridinium tetrafluoroborate (BMPyBF4) interacts with excess PbI2 during film formation, driving the formation of a low‐dimensional perovskite phase and enabling the self‐organization of a 3D/2D interfacial structure. This molecularly regulated interface suppresses defect‐mediated recombination and facilitates interfacial charge ...
Bulent Alkan, Faranak Sadegh, Ji‐Youn Seo, Thanh‐Danh Nguyen, Muhittin Unal, Daniel Prochowicz, Pankaj Yadav, Mucahit Yilmaz, Servet Turan, Seckin Akin   +9 more
wiley   +1 more source

Oxaziridines: Versatile Reagents in Modern Organic Synthesis

The Chemical Record, EarlyView.
Being capable of transferring an O atom and N‐group/atom, oxaziridines are considered multitasking agents. These are employed for diverse organic transformations, such as epoxidation of olefins, α‐ and γ‐hydroxylation/amination of carbonyl compounds, oxidation of sulfides, [3+2]cycloaddition with unsaturated systems.
Ajeet Chandra, Subba Rao Cheekatla, Keshaba Nanda Parida   +2 more
wiley   +1 more source

Catching Wyckoff’s Phantom: The Peculiar Crystal Structure of Orthorhombic Cs[ICl2]

Zeitschrift für anorganische und allgemeine Chemie, EarlyView.
Over 100 years after the first crystallographic elucidation, the still elusive orthorhombic modification of Cs[ICl2] could be isolated and structurally elucidated from the reaction of aqueous H[ICl4] with Cs2CO3. The [ICl2]− anion shows an unusually large bond length asymmetry, which shows characteristics of a Cl−∙∙∙I–Cl complex with an extremely ...
Jan Langwald, Antonio Frontera, Mathias S. Wickleder   +2 more
wiley   +1 more source

Benign by design: A paradigm shift in cosmetic ingredient development

International Journal of Cosmetic Science, EarlyView.
Benign by design strategies enable the creation of biodegradable cosmetic ingredients, reducing environmental persistence while maintaining the intended biological activity. This work compiles design rules and tools to guide the development of more sustainable molecules for the cosmetics industry.
Sandra Mota, Klaus Kümmerer, Isabel Martins de Almeida, Emília Sousa   +3 more
wiley   +1 more source

Pyridinium cationic lipids as gene transfer agents

, 2004
Pyridinium cationic lipids useful as non-viral gene delivery agents are disclosed. The agents are prepared by reaction of pyrylium salts with primary amines.
Seitz, William A., Wentz, Melissa J., Johnson, Betty H., Ilies, Marc A. C., Thompson, Edward Bradbridge, Garfield, Robert E., Balaban, Alexandru T., Miller, Aaron L.   +7 more
core   +1 more source

Selective photo labeling of tryptophan in N‐acetyl‐L‐tryptophan ethyl ester and peptide WWCNDGR with a diaryl nitrenium ion

Photochemistry and Photobiology, EarlyView.
Visible light photolysis of a N‐(N,N‐diarylaminopyridinium) salt allows for covalent modification of a peptide. Mass spectrometry demonstrates that this procedure selectively labels tryptophan residues. Laser flash photolysis experiments show that bond formation occurs via a diarylnitrenium ion intermediate.
Edward S. Chinn, Yue Li, Abigail M. Joyce, Daniel E. Falvey   +3 more
wiley   +1 more source

Spectral studies on pyridinium hexafluorophosphate

, 1985
Pure samples of pyridinium hexafluorophosphate ($C_5H_5$$^+_NHPF^-_6$) were prepared by the reaction of pyridinium poly(hydrogen fluoride) and phosphorus(V) halides. The i.r.
Mohamed, Syed K, Padma, DK
core  

Design of Lipopeptides and dsRNA‐Lipopeptide Complexes for Sprayable RNAi‐Based Plant Protection

Journal of Peptide Science, Volume 32, Issue 11, November 2026.
Lipopeptide surfactants self‐assemble into nanostructure carriers that complex, protect, and deliver dsRNA, establishing structure–function relationships for next‐generation RNAi‐based insect control. ABSTRACT Broad‐spectrum insecticides persist in the environment, affecting non‐target organisms and selecting for resistant pest populations. In contrast,
Pascal Geisler, Frank Steiniger, Andreas Vilcinskas, Christoph Hellmann   +3 more
wiley   +1 more source

Pyridine and pyridinium-based anion receptors

, 2010
Pyridine and pyridinium heterocycles play an important role in anion receptor chemistry. Hydrogen bond arrays are frequently preorganized by the presence of the pyridine nitrogen lone pair of electrons, whilst the positively charged pyridinium group is ...
Nathan Kilah (14741152), Beer, PD (15571769)   +1 more
core  

Structural and Spectroscopic Evidence of Hydrogen Bonded Anionic Wires in Protic Ionic Liquids

ChemPhysChem, Volume 27, Issue 19, 14 October 2026.
Anionic wires of deprotonated carboxylic acids challenge the general wisdom that like charges repel. The hydrogen bond motif observed in the X‐ray structure is even preserved in the liquid state of the material as shown by δ1H NMR spectroscopy. The experimental and theoretical findings provide deep insight into the nature of hydrogen bonding.
Maham Azhar, Lasse Hunger, Loai Al‐Sheakh, Andreas Appelhagen, Lennart Kruse, Ralf Ludwig   +5 more
wiley   +1 more source