Results 41 to 50 of about 11,763 (223)

The Challenging P‐Alkylation of Aromatic Phosphorus Heterocycles and Follow‐Up Reactions

ChemistryEurope, EarlyView.
P‐alkylation of λ3σ2‐phosphinines is hindered by weak nucleophilicity and scarce synthetic access, previously requiring multistep routes or extreme electrophiles. A direct ambient‐condition method is reported using 3,5‐bis(trimethylsilyl)‐phosphinine/B(C6F5)3 with esters or iso(thio)cyanates to generate stable 1‐R‐phosphininium salts.
Samantha Frank, Ádám Horváth, Duy Nguyen, Moritz J. Ernst, Simon Steinhauer, Zoltán Benkő, Christian Müller   +6 more
wiley   +1 more source

Neurotoxic and neuromotor effects of cyanate, an oxidative byproduct of cyanide from linamarin in cassava: A systematic review

NAJFNR
Background Linamarin-induced neurotoxicity manifests as either polyneuropathy, ataxia, and sensorineural deafness or as isolated symmetric spastic paraparesis of bilateral limbs, which are frequently observed in populations subsisting on a monotonous ...
Rafael Vincent Manalo, Antonio Lorenzo Ong, Paul Mark Medina   +2 more
doaj   +1 more source

[3,3]-Sigmatropic Rearrangements of Fluorinated Allyl (Thio)cyanates – A Tool for the Synthesis of Fluorinated (Thio)ureas

CHIMIA, 2014
The first (thio)cyanate to iso(thio)cyanate rearrangements based on 2-fluoroallylic alcohols are presented. Long-chain 2-fluoroallylic alcohols were converted to corresponding N-unsubstituted carbamates by treatment with trichloroacetyl ...
Daniel C. Ramb, Lisa Kost, Günter Haufe
doaj   +1 more source

Linear and Two‐Dimensional Infrared Spectroscopy of the Multifunctional Vibrational Probe, 3‐(4‐Azidophenyl) Propiolonitrile. Deperturbing a Fermi Triad by Isotopic Substitution

ChemPhysChem, Volume 26, Issue 6, March 15, 2025.
Linear infrared spectroscopy combined with isotope labeling and density functional theory unravels the origin of a Fermi triad in a multifunctional vibrational chromophore. Ultrafast 2DIR‐spectroscopy reports directly on the dynamics and the intramolecular vibrational energy flow pathways in the isotopically deperturbed system. Abstract Infrared probes
Claudia Gräve, Jörg Lindner, Stefan Flesch, Luis I. Domenianni, Peter Vöhringer   +4 more
wiley   +1 more source

Niche differentiation in microorganisms capable of using alternative reduced nitrogen sources studied across depth and between oxic and anoxic ocean regions

Frontiers in Marine Science
IntroductionAssimilation of reduced nitrogen is less energetically costly than assimilation of oxidized forms. In the open ocean, ammonium is generally absent from the water column, including in oxygen-deficient zones (ODZs).
Paulina Huanca-Valenzuela, Jacob A. Cram, Clara A. Fuchsman   +2 more
doaj   +1 more source

π‐Expanded Fluoranthenes as Chromophores With Tailored Properties

Helvetica Chimica Acta, EarlyView.
A series of π‐expanded fluoranthene scaffolds selectively functionalized with electron donors and acceptors were synthesized. The evolution of the structural, optoelectronic, and redox properties in relation to substitution and cyclization was comprehensively studied both in experiment and in theory. The results identify the compounds as highly tunable
Silas C. Eiden, Erik Misselwitz, John Bergner, Frank Rominger, Milan Kivala   +4 more
wiley   +1 more source

High‐Voltage Cathode Materials for Sodium‐Ion Batteries: Advances and Challenges

Small, EarlyView.
This review explores the role of high‐voltage cathode materials in enhancing the performance of SIBs. It focuses on strategies to improve energy density, rate capacity, and stability, addressing challenges like phase transitions, metal migration, and electrolyte degradation.
Congqi Ren, Yulian Dong, Yong Lei
wiley   +1 more source

Results of GC–MS Analyses of 40 Extracts of Diabetes Devices

Contact Dermatitis, EarlyView.
Forty acetone extracts of 27 diabetes devices were investigated by gas chromatography–mass spectrometry. Two hundred eighty four individual chemicals were identified. All 40 extracts contained one or more chemicals that were previously identified as allergens in diabetes devices causing allergic Contact Dermatitis.
Emma M. van Oers, Anton C. de Groot, Patrick Verolme, Norbertus A. Ipenburg, Thomas Rustemeyer   +4 more
wiley   +1 more source

Micro Model of Carbon Fiber/Cyanate Ester Composites and Analysis of Machining Damage Mechanism

Chinese Journal of Mechanical Engineering, 2019
Machining damage occurs on the surface of carbon fiber reinforced polymer (CFRP) composites during processing. In the current simulation model of CFRP, the initial defects on the carbon fiber and the periodic random distribution of the reinforcement ...
Haitao Liu, Jie Lin, Yazhou Sun, Jinyang Zhang   +3 more
doaj   +1 more source

Curing model and process parameters of cyanate ester resin based adhesives for spacecraft

Cailiao gongcheng, 2020
The non-isothermal reaction kinetics of cyanate ester system was investigated by dynamic differential scanning calorimetry (DSC). The analysis of non-isothermal data was carried out by using the model-fitting Kissinger, Flynn-Wall-Ozawa, and Crane ...
HE Duan-peng, GAO Hong, XING Yan, LI Yan, WANG Xiang-ke   +4 more
doaj   +1 more source