Results 51 to 60 of about 300,019 (196)
Chemistry – A European Journal, EarlyView.A library of 21 tetrakis(phenothiazinyl)‐substituted silanes with broadly variable substituent decoration, which are fully reversible multistage redox systems with intense tunable emission from deep blue to yellow–green (441–533 nm), was rapidly synthesized by bromine–lithium exchange/borylation–Suzuki coupling of tetrakis(4‐bromophenyl)silane or by ...
Thomas P. M. Merke +4 more
wiley +1 more source
, 2001 Density Functional Theory (DFT) calculations show that there is a linear correlation between NICS values (aromaticity criterion) and experimental Hammett (Brown) constants (σp+), together with other computed parameters for p-substituted benzyl cations. ©
Hillier, Ian H., Morao, Iñaki
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Bulletin of the Chemical Society of Ethiopia, 2015 Some azomethines including substituted benzylidene-4-chlorobenzenamines (E-imines) have been synthesized by fly-ash: PTS catalyzed microwave assisted condensation of 4-chloroaniline and substituted benzaldehydes under solvent-free conditions.
R. Suresh +13 more
doaj +1 more source
Designing a Triplet 2‐Formylphenylnitrene With Fast Tunneling Reactivity
Chemistry – A European Journal, EarlyView.A 3‐CF3 substituent accelerates tunneling in triplet 2‐formylphenylnitrene, making its reactivity in cryogenic matrices too fast for conventional IR spectroscopic detection. Bringing this chemistry to low‐temperature solutions allows suppression of intrinsic nitrene dimerization through faster cyclization, which even outcompetes the 1,4‐H shift ...
Sofia Braz +4 more
wiley +1 more source
European Journal of Organic Chemistry, EarlyView.A comprehensive DFT conformational study of Grignard additions to α‐alkoxy nitrones reveals that the reaction proceeds through a dinuclear α‐chelated transition structure in which the nitrone oxygen coordinates two magnesium centers. Other common additives, such as zinc dichloride, boron trifluoride, and dimethylaluminum chloride, were also studied ...
Manuel Pedrón +2 more
wiley +1 more source
The Substituent Effect on the Radical Scavenging Activity of Apigenin
Molecules, 2018 Flavonoids widely found in natural foods are excellent free radical scavengers. The relationship between the substituent and antioxidative activity of flavonoids has not yet been completely elucidated. In this work, the antioxidative activity of apigenin
Yan-Zhen Zheng +3 more
doaj +1 more source
Polymer International, EarlyView.Side‐group functionalization enhances the reactivity and optoelectronic properties of poly(p‐phenylene vinylene) (PPV) derivatives for chemical sensing. PPV‐CN and PPV‐NO2 display strong interactions and pronounced responses, providing molecular‐level insights for designing high‐performance polymer‐based sensors.
Bruno Hori Barboza +3 more
wiley +1 more source
Small, EarlyView.A three‐residue peptide bioconjugated onto a carbon nanotube quantum defect turns the near‐infrared emission of quantum defects into a reporter of integrins on intact extracellular vesicles, directly in human plasma. The sensor reveals that healthy fibroblast vesicles carry as much RGD‐binding integrin as cancer‐derived ones, an adhesion‐associated ...
In‐Jun Hwang +9 more
wiley +1 more source
Dan Hammett: teapot/ceramics(3) [PDF]
, 2017 ARTIST: Dan Hammett (UD Professor) MATERIAL: ceramics DIMENSIONS: COLLECTION: UDC CATALOG#: UDC.3002.5 LOCATION: Counselor’s office (confirm) PROVENANCE: University of Dallas, 2017From http://www.danhammettceramics.com/: I have been privileged in ...
Hammett, Dan
core
Anwendung der Hammett-Gleichung auf die Acidität von 3-Brom-1,2,4-triazolen [PDF]
, 1967 Ionization constants of a set of 5-substituted 3-bromo-1,2,4- triazoles have been determined by potentiometric titration.
Freiberg, Walter +1 more
core +1 more source