Results 81 to 90 of about 153,572 (317)

[2+2]-cycloadditions of alkenes with the triphenylallenyl cation [PDF]

, 1984
The triphenylallenyl cation (8), generated from triphenylpropynol (7) and FSO3H, reacts with alkenes to give the allyl cations 12, which may be deprotonated to yield the methyleneccylobutenes 14.
Deno, Englbert Bäuml, Hammen, Hanack, Herbert Mayr, Marvell, Mayr, Mayr, Mayr, Mayr, Mayr, Mayr, Olah, Pittman   +13 more
core   +1 more source

Harnessing Synergistic Cooperation of Neighboring Active Motifs in Heterogeneous Catalysts for Enhanced Catalytic Performance

Advanced Materials, EarlyView.
This review examines the critical role of neighboring active motifs in heterogeneous catalysts, emphasizing how their synergistic cooperativity can be rationally designed to modulate catalytic properties. The discussion centers on the modulation of electronic and geometric structures, categorizing the catalytic systems into metal‐acid (Brønsted/Lewis ...
Peng Yuan, Ching Kit Tommy Wun, Tsz Woon Benedict Lo   +2 more
wiley   +1 more source

Catalytic cycloaddition of acrylates to norbornadiene. Kinetics and mechanism

Тонкие химические технологии, 2010
Kinetics of [2+2+2]-cycloaddition of acrylates to norbornadiene in the presence of η3-bis(allyl) nickel was studied. The thermodynamic parameters were determined. Kinetics equations for all of the isomer reaction products were found.
I. E. Efros, O. A. Nikityuk, D. V. Dmitriev, V. R. Flid   +3 more
doaj  

High-level Computational Study of the Site-, Facial- and Stereoselectivities for the Diels-Alder Reaction Between o-Benzoquinone and Norbornadiene

Molecules, 2000
Ab initio and DFT quantum chemical calculations have been applied to a study of the Diels-Alder reaction of o-benzoquinone as diene and norbornadiene as dienophile.
Ronald N. Warrener, Martin R. Johnston, Davor Margetic   +2 more
doaj   +1 more source

Surface nano-patterning through styrene adsorption on Si(100)

, 2005
We present an ab initio study of the structural and electronic properties of styrene molecules adsorbed on the dimerized Si(100) surface at different coverages, ranging from the single-molecule to the full monolayer.
A. C. Ferraz, A. Calzolari, A. Ruini, C. B. Duke, E. Molinari, J. P. Perdew, M. J. Caldas   +6 more
core   +1 more source

Synthesis and use of a stable aminal derived from TsDPEN in asymmetric organocatalysis [PDF]

, 2010
A stable aminal formed stereoselectively from (R,R)-N-tosyl-1,2-diphenyl-1,2-ethylenediamine (TsDPEN) is capable of asymmetric organocatalysis of Diels-Alder and alpha-amination reactions of ...
Clarkson, Guy J., Gosiewska, Silvia, Soni, Rina, Wills, Martin   +3 more
core   +1 more source

Exploiting double exchange Diels-Alder cycloadditions for immobilization of peptide nucleic acids on gold nanoparticles [PDF]

, 2020
The generation of PNA-decorated gold nanoparticles (AuNPs) has revealed to be more difficult as compared to the generation of DNA-functionalized ones. The less polar nature of this artificial nucleic acid system and the associated tendency of the neutral
Cadoni, Enrico, Madder, Annemieke, Mancin, Fabrizio, Manicardi, Alex, Rosa-Gastaldo, Daniele   +4 more
core   +2 more sources

Designing Physical Unclonable Functions From Optically Active Materials

Advanced Materials, EarlyView.
Assigning unforgeable “fingerprints” to manufactured goods is a key strategy to fight global counterfeiting. Optical physical unclonable functions (PUFs) are chemically generated random patterns of optically active materials serving as unique authenticators.
Maxime Klausen, Junfang Zhang, Molly M. Stevens   +2 more
wiley   +1 more source

Bioinspired Design of Heterogenous Single‐Atomic‐Site Catalysts for Electrocatalysis and Photocatalysis

Advanced Materials, EarlyView.
This review gives a summary on the representative bioinspired single‐atomic‐site catalysts (SACs) and their applications in heterogeneous electrocatalysis and photocatalysis. The fundamentals of bioinspired design strategies are systematically discussed in the context of the first shell coordination, the second/long‐range coordination, and the outer ...
Ying Wang, Guangri Jia, Piaoping Yang, Linshan Zhang, Kwok‐Yin Wong   +4 more
wiley   +1 more source

Synthesis of aryl-1H-1,2,3-triazoles via 1,3-dipolar cycloaddition

Orbital: The Electronic Journal of Chemistry, 2012
A series of Aryl-1H-1,2,3-triazoles were prepared from the reaction between aril-azide (1) with 1.5 equiv. of terminal alkynes (2a-o). The reactions carried out at room temperature and in the presence of CuI (10 mol%) in acetonitrile. The compounds (3a-o)
Wagner O. Valença, Jucleiton José R. de Freitas, Ronaldo N. de Oliveira   +2 more
doaj   +1 more source