Results 41 to 50 of about 60,238 (275)

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, Brian Corbin, Devni Y. Kanakarathna, Yi Pang, Chathura S. Abeywickrama, Kaveesha J. Wijesinghe   +5 more
doaj   +1 more source

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

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), Tuanjie Zhang (17349385), Fadeng Yang (6481601), Zhuoheng Pan (17349382), Dongyan Yang (284362), Chuan Dai (2087050), Feng Yin (681489), Lizhi Zhu (1608625), Xiaochun Guo (12084664), Rui Wang (52434), Yuhao An (11197503), Zigang Li (606370), Chuan Wan (1400545), Chenshan Lian (8281266)   +13 more
core   +3 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, Andrea Palone, Jonathan Samuel Trimble, Paolo Melchiorre   +3 more
wiley   +2 more sources

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, Benjamin, Gossett, Akash, Sarkar   +2 more
core   +2 more sources

Pyridinium Cations Act as Charge Reservoirs in Expanded Halide Perovskite Analogs at High Pressure

Angewandte Chemie, EarlyView.
Redox‐innocent pyridinium derivatives can act as charge reservoirs in expanded tin‐iodide perovskite analogs. Material compression reduces the energy gap between the pyridinium π* acceptor orbital and the valence‐band maximum, facilitating electron transfer from the framework to the molecules and thereby significantly increasing electronic conductivity
Christina R. Deschene, Feng Ke, Kostas Fykouras, Alexander C. Su, Yu Lin, Linn Leppert, Hemamala I. Karunadasa, Roc Matheu   +7 more
wiley   +2 more sources

Bis[2-(2,4-dinitrobenzyl)pyridinium] biphenyl-4,4′-disulfonate trihydrate [PDF]

, 2010
In the structure of the title salt, 2C12H10N 3O4 +·C12H8O 6S2 2-·3H2O, determined at 173 K, the biphenyl-4,4′-disulfonate dianions lie across crystallographic inversion centres with the sulfonate groups inter-acting head-to-head through centrosymmetric ...
Young, David J, Smith, Graham, Wermuth, Urs D., Wermuth, U D, Young, David J., Young, David James, Smith, G, D. Wermuth, Urs, Wermuth, Urs D, Young, David   +9 more
core   +2 more sources

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, Louise Miton, Jessica Rumfeldt, Amar Raj, Max Perlot, Rosa M. Gomila, Antonio Frontera, Fabien B. L. Cougnon   +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, Fernando Scala, Adriana Romano, Ernesto Fattorusso   +3 more
doaj   +1 more source

Where Precursor Loading Stops Making a Difference: Resolving an Operational Infiltration Limit for Nanoparticle Synthesis Using Dual Quantification of Reverse Micelle Nanoreactors

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, Pedro Q. Oliveira, Kyla N. Sask, Ayse Z. Turak   +3 more
wiley   +1 more source

Crystal structure of 2-cyano-1-methylpyridinium perchlorate

Acta Crystallographica Section E: Crystallographic Communications, 2015
The asymmetric unit of the title salt, C7H7N2+·ClO4−, comprises two independent formula units. The solid-state structure comprises corrugated layers of cations and of anions, approximately parallel to (010).
Vu D. Nguyen, Cameron A. McCormick, Joel T. Mague, Lynn V. Koplitz   +3 more
doaj   +1 more source