Results 141 to 150 of about 61,221 (238)

Pyridinium halide promoted ring-opening reactions of exo-norbornene oxide

open access: yes, 1983
Ring opening of 1 with pyridinium chloride or pyridinium iodide in chloroform and/or pyridine gives significant amounts of halohydrins 2a or 2b, reflecting partial suppression of the Wagner-Meerwein rearrangement that occurs on ring-opening with hydrogen
G. Gargaro   +3 more
core  

Super‐Electron‐Donor Polymers: From Monomer Design to Redox Functionality

open access: yesSmall, EarlyView.
2,2'‐Bipyridinylidenes are known for their “super‐electron‐donor” properties and have therefore been used beyond the field of organic synthesis. Their two‐electron redox process at a low potential of 1.8 V vs. Li/Li+ makes them attractive negative p‐type electrode‐active materials.
Luisa Rzesny   +9 more
wiley   +1 more source

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

open access: yesSmall, 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   +9 more
wiley   +1 more source

1-Tetra-decyl-pyridinium bromide monohydrate

open access: yes, 2008
1-Tetra-decyl-pyridinium bromide ...
S Brooker (13449378)   +4 more
core  

Distinct Nanohoop Structures and Ratiometric Emissions of Isomeric DPAC‐Based Macrocycles Tuned by Nano‐Twisting of Stiff‐Stilbene Optical‐Switches

open access: yesSmall, EarlyView.
Tunable nano‐twisted structures of novel isomeric macrocycles, which were controlled by cis/trans isomerizations of stiff‐stilbene units under light irradiations, have been exploited to modulate bent and planar configurations of 9,14‐diphenyl‐9,14‐dihydrodibenzo[a,c]phenazine (DPAC) moieties and adjust their ratiometric emissions. External factors, i.e.
Nguyen Thanh Trung   +11 more
wiley   +1 more source

Preparation of Pyridinium and Diaminocarbonium Barbituric Acid Ylides [PDF]

open access: yes, 2003
Through NMR experiments of the reaction of barbituric acid with carbodiimide, a general synthetic procedure for the preparation of 5-diaminomethylenebarbiturates (DABA) was developed.
Douelle, Frederic
core  

A Serum‐Resistant Plasma Membrane Probe for Real‐Time Visualization of Pathogen‐Induced Epithelial Barrier Dysfunction

open access: yesSmall, EarlyView.
PM580 selectively activates at the plasma membrane while remaining minimally responsive to serum albumin, enabling serum‐compatible, surface‐confined imaging for 24 h, unlike conventional probes that rapidly internalize and lose membrane contrast.
Yujeong Choi   +12 more
wiley   +1 more source

Oxaziridines: Versatile Reagents in Modern Organic Synthesis

open access: yesThe 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   +2 more
wiley   +1 more source

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

open access: yesZeitschrift 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   +2 more
wiley   +1 more source

Pyridinium-Based Strategy for a Bioorthogonal Conjugation-Assisted Purification Method for Profiling Cell Surface Proteome

open access: yes
Cell surface proteins (CSPs) are valuable targets for therapeutic agents, but achieving highly selective CSP enrichment in cellular physiology remains a technical challenge.
Yongli Li (527489)   +13 more
core   +1 more source

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