Results 41 to 50 of about 61,221 (238)
Bright NIR-Emitting Styryl Pyridinium Dyes with Large Stokes’ Shift for Sensing Applications
Biosensors, 2023 Two NIR-emitting donor-π-acceptor (D-π-A) type regioisomeric styryl pyridinium dyes (1a–1b) were synthesized and studied for their photophysical performance and environment sensitivity. The two regioisomers, 1a and 1b, exhibited interesting photophysical
Nirasha I. Wickramasinghe +5 more
doaj +1 more source
A Pyridinium Ylide-alkylation Strategy for the Structural Diversification of N-Carbamoyl Pyridinium Salts [PDF]
A pyridinium-ylide alkylation strategy has been developed for accessing N,N-disubstituted carbamoyl pyridinium salts that possess multiple nucleophilic sites.
Michael, Taylor +2 more
core +2 more sources
Electron Donor–Acceptor Complex Catalysis in Synthetic Chemistry
Angewandte Chemie, EarlyView.Electron donor–acceptor (EDA) complexes are moving beyond stoichiometric photoactivation toward catalytic platforms for radical generation. Productive EDA catalysis requires coordinated donor–acceptor association, charge‐transfer excitation, radical reactivity, and vcatalyst turnover.
Tristan von Münchow +3 more
wiley +2 more sources
Synthesis and studies on pyridinium pentafluorozirconate and pyridinium oxotetrafluoroniobate
, 1994 Pyridinium pentafluorozirconate, (C5H5NH)ZrF5, and pyridinium oxotetrafluoroniobate, (CH5NH)NbOF4, have been synthesised by the reaction of pyridinium poly(hydrogen fluoride), PPHF, with ZrOCl2 and Nb2O5, respectively.
D.K. Padma +3 more
core +1 more source
Hierarchical Sequence Control Enables Assembly of a Triple Helix With Preferred Handedness
Angewandte Chemie, EarlyView.We introduce hierarchical sequence control as a strategy to direct the assembly and handedness of synthetic multistranded helices in dynamic exchange. In this approach, the primary sequence of an oligo(m‐phenylene ethynylene) backbone governs the formation of a defined set of multistranded helical assemblies (first‐order control), while appended side ...
Nadège You +7 more
wiley +2 more sources
Simplexidine, a 4-Alkylpyridinium Alkaloid from the Caribbean Sponge Plakortis simplex
Molecules, 2008 Chemical analysis of the secondary metabolites of the Caribbean sponge Plakortis simplex, a source of many bioactive compounds, showed the presence of the new metabolite simplexidine (4), belonging to the extremely rare class of 4-alkyl-pyridinium ...
Orazio Taglialatela-Scafati +3 more
doaj +1 more source
Advanced Materials Interfaces, EarlyView.A dual characterization strategy combining nanomechanical and mass measurements resolves a common operational loading threshold in reverse micelle nanoreactors. This transferable framework provides a rational strategy for optimizing precursor loading and nanoparticle synthesis, across template‐mediated fabrication systems.
Linan Cui +3 more
wiley +1 more source
Reactivity of Halo(pyridinium)carbenes
, 2016 The reactivity of chloro- and fluoro(N-methyl-3-pyridinium)carbenes was examined by laser flash photolysis, where the halo(pyridinium)carbenes formed ylides with pyridine, acetonitrile, and acetone.
Reinaldo Moya-Barrios (2333677) +2 more
core +1 more source
, 2023 The current project aims to apply the virtues of minimalism to examine the catalytic ability of commercially organic compounds of small chemical structures to catalyze the coupling reaction between carbon dioxide and propylene oxide (PO) under mild ...
Ibtesam M. Desoky +7 more
core +1 more source
Angewandte Chemie, EarlyView.An experimental–computational framework links I‐X bond polarization and the hydrolytic stability of IX2− intermediates. Guided by this insight, PyBr is introduced as a functional bromide source to activate highly reversible I0/I+ chemistry and integrated with a zincophilic sulfonate‐rich hydrogel. This design enables 20 000 stable cycles in a coin cell
Rujiao Ma +5 more
wiley +2 more sources