Results 121 to 130 of about 22,841 (254)

Binding Selectivity of Cucurbit[7]uril:  Bis(pyridinium)-1,4-xylylene versus 4,4‘-Bipyridinium Guest Sites

, 2016
The binding interactions between the host cucurbit[7]uril (CB7) and a series of linear guests containing bis(pyridinium)-1,4-xylylene and/or 4,4‘-bipyridinium residues were investigated by 1H NMR spectroscopy.
Vladimir Sindelar (1393312), Angel E. Kaifer (1489798), Kwangyul Moon (2482252)   +2 more
core   +1 more source

More π, less Gap: Band Gap Tuning in Hybrid Antimony Halide Charge Transfer Semiconductors

Zeitschrift für anorganische und allgemeine Chemie, EarlyView.
Extending the π‐conjugation of the organic cation from bipyridinium to phenanthrolinium in hybrid antimony chloride charge transfer semiconductors reduces the band gap from 2.6 to 2.1 eV. This demonstrates that modifying the organic cation's π‐system enables band gap tuning in hybrid charge transfer semiconductors.
Jakob Blahusch, Mirjam Zipkat, Wolfgang Schnick, Bettina V. Lotsch   +3 more
wiley   +1 more source

Preparation and Characterization of Polyphenol-Functionalized Chitooligosaccharide Pyridinium Salts with Antioxidant Activity

Marine Drugs
As a kind of eco-friendly material with wide application prospects, chitooligosaccharide (COS) has attracted increasing attention because of its unique bioactivities.
Zhen Qi, Wenqiang Tan, Zhanyong Guo, Aili Jiang   +3 more
doaj   +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

Synthesis and enzymatic evaluation of pyridinium-substituted uracil derivatives as novel inhibitors of thymidine phosphorylase

, 2002
A series of water soluble N(1)- and C(6)-substituted uracil pyridinium compounds were prepared as potential inhibitors of thymidine phosphorylase (TP). The C(6)-uracil substituted derivatives were the most active. 1-[(5-Chloro-2,4-dihydroxypyrimidin-6-yl)
Stratford, Ian J., Freeman, Sally; id_orcid, Stacey D. Lockyer, Sally Freeman, McNally, Virginia A., Williams, Kaye J., Ian J. Stratford, Mohammed Jaffar, Virginia A. McNally, Jaffar, Mohammed, Paul E. Murray, Kaye J. Williams, Lockyer, Stacey D., Murray, Paul E.   +13 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

Solid-phase synthesis and cytotoxic evaluation of novel pyridinium bromides

Scientific Reports
A series of amide-based mono and dimeric pyridinium bromides were synthesized using conventional and microwave-assisted solvent-free methods. The quaternization reactions of m-xylene dibromide and 4-nitrobenzylbromide with amide-based substituted ...
Sadaiyan Govindaraj, Kilivelu Ganesan, Perumal Elumalai, Rajanathadurai Jeevitha, Jospin Sindya, Subramani Annadurai, Shiek S. S. J. Ahmed, Mudassar Shahid   +7 more
doaj   +1 more source

Heart‐Specific Spinal and Vagal Afferents: Transcriptomic Signatures and Optogenetically Modulated Functional Coupling With Cardiomyocytes

Comprehensive Physiology, Volume 16, Issue 4, August 2026.
Selective purification of heart‐specific spinal and vagal sensory neurons by retrograde labeling and FACS purification showed enhanced spontaneous, optogenetic, and chemically stimulated Ca2+ activity. Transcriptomic profiling identified distinct ion channel and GPCR signatures in heart‐specific sensory neurons.
T. Akgul Caglar, Y. E. Kazci, Z. B. Durdu, S. Sahoglu Goktas, S. Bay, E. Vatandaslar, M. U. Turhan, G. Ozturk, E. Cagavi   +8 more
wiley   +1 more source

Preparation of Pyridinium and Diaminocarbonium Barbituric Acid Ylides

, 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  

Asymmetric α‐Alkylation With Activated and Unactivated Electrophiles by a Highly Productive and Recyclable Lewis Acid/Imidazolium Catalyst

Angewandte Chemie International Edition, Volume 65, Issue 27, 1 July 2026.
An air‐stable, easily prepared, bifunctional Cu(II)/imidazolium complex enables highly enantioselective α‐alkylation of 1,3‐dicarbonyls with outstanding productivity (TON up to 1740). Highlights include broad electrophile scope spanning π‐activated and nonactivated reagents, stereo‐retentive allylation, simple catalyst synthesis, and efficient catalyst
Johanna Haußmann, Alexander Beck, Dominik Hornung, Michael Mistele, Alexander Allgaier, Wolfgang Frey, Joris van Slageren, Johannes Kästner, René Peters   +8 more
wiley   +1 more source