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CatalysisTissue DonorsBlood DonorsLiving DonorsKineticsBiocatalysisModels, MolecularCatalytic DomainSubstrate SpecificityBinding SitesMolecular Sequence DataCrystallography, X-RayMutagenesis, Site-DirectedAmino Acid SequenceProtein ConformationEscherichia coliModels, ChemicalHydrogen-Ion ConcentrationTissue and Organ ProcurementBase SequenceRNA, CatalyticRecombinant ProteinsMolecular StructureHydrolysisOxidation-ReductionHistidineTransplantation, HomologousGraft SurvivalProtein Structure, TertiaryProtein BindingMutationStructure-Activity RelationshipStereoisomerismLiver TransplantationSequence Homology, Amino AcidAntibodies, CatalyticHydrogen BondingKidney TransplantationAmino Acid SubstitutionEnzyme StabilityEnzymesAspartic AcidMetalsTissue and Organ HarvestingHistocompatibility TestingProtein Structure, SecondarySequence AlignmentThermodynamicsMagnesiumCysteineBacterial ProteinsBone Marrow TransplantationProtonsBrain DeathCloning, MolecularOxidoreductasesMolecular ConformationGraft vs Host DiseaseSpectrophotometryGraft RejectionTime FactorsAdenosine TriphosphateCadaverConserved SequenceInsemination, Artificial, HeterologousTemperatureLysineArginineNADPNucleic Acid ConformationManganeseProton-Translocating ATPasesHistocompatibilityElectronsFlavin-Adenine DinucleotideDNA PrimersDimerizationNADAlkenesOxygenFlavinsElectron Spin Resonance SpectroscopyProtein Structure, QuaternaryCyclizationHydrogenMagnetic Resonance SpectroscopyHemeOocyte DonationElectron TransportPhosphatesAsparagineHematopoietic Stem Cell TransplantationCircular DichroismDNASulfhydryl CompoundsEscherichia coli ProteinsIminesEnzyme InhibitorsLewis AcidsLiver
LigandsAcceptorCatalystsEnzyme that catalysesMethyl donorAcid catalysisPhotoredox catalysisHETEROGENEOUSProtonsAsymmetricCatalyticSynthesisOrganicElectron donorOrganometallicEnantioselectiveCatalystReactionAcidicMolecularComplexesReactionsMoleculeSubstitutionAlcoholsProteinsCompoundCompoundsOxygen-atomCoordinationHydrogen atomsGroupPotentialIntermediateRoleFound
Ligands5
  • An overview of the bonding and reactivity of metal carbon σ,π donor/π acceptor ligands will be given. (bath.ac.uk)
  • All four catalysts displayed significantly faster catalytic rates than the related complexes reported previously containing NHC/pyrazolyl donor ligands. (edu.au)
  • Thus, the development of simple and economical ligands composed of biomimetic donors should be a key focus that cannot be overlooked in the pursuit of sustainable catalyst candidates. (bvsalud.org)
  • This is an Account of our group's efforts to develop first-row transition metal complexes which use [SNS]-pincer ligands for bifunctional catalysis. (bvsalud.org)
  • We have synthesized two potentially tridentate ligands, one bearing an amido and two thioether donors [(SMeNSMe), L1] and one which includes thiolate, imine, and thioether donors [(SNSMe), L2], and used them as platforms upon which to explore the reaction pathways of first-row metals. (bvsalud.org)
Acceptor14
  • The role of short hydrogen bonds in catalysis has remained highly debated and led to establishment of several distinctive geometrical arrangements of hydrogen atoms vis-à-vis the heavier donor and acceptor counterparts, that is, low-barrier, single-well or short canonical hydrogen bonds. (rcsb.org)
  • Alternatively, asymmetric autocatalysis will be explored using simple cyclic and acyclic acceptor molecules and amine donors to generate e.g. amino acids. (noorderlink.nl)
  • Catalysis of an oxidation-reduction (redox) reaction in which a CH-CH group acts as a hydrogen or electron donor and reduces a hydrogen or electron acceptor. (mcw.edu)
  • Matsuo, K & Yasuda, T 2017, ' Enhancing thermally activated delayed fluorescence characteristics by intramolecular B-N coordination in a phenylpyridine-containing donor-acceptor π-system ', Chemical Communications , vol. 53, no. 62, pp. 8723-8726. (elsevierpure.com)
  • Specific topics will vary, but will generally include coverage of atomic structure, simple bonding theory, donor-acceptor chemistry, the crystalline solid state, coordination compounds and isomerism, electronic and infrared spectroscopy applied to inorganic complexes, substitution mechanisms, and catalysis. (ionicviper.org)
  • What is hydrogen bond donor and acceptor? (lespressobarmercurio.com)
  • The terms ″hydrogen bond donor″ and ″acceptor″ are used to refer to the two different chemicals that take part in the production of hydrogen bonds. (lespressobarmercurio.com)
  • Is hydrogen a donor or acceptor? (lespressobarmercurio.com)
  • Is water H bond donor or acceptor? (lespressobarmercurio.com)
  • Ammonia is the hydrogen bond acceptor (shown by the color red), while water is the hydrogen bond donor in this particular hydrogen bond that exists between water and ammonia. (lespressobarmercurio.com)
  • The X-H group acts as the donor of hydrogen bonds (shown in red), and the A group acts as the acceptor of hydrogen bonds. (lespressobarmercurio.com)
  • Donor count is defined as the total number of atoms in a molecule that possess the H donor attribute.Donor sites are equal to the total number of hydrogen atoms that are coupled to the individual donor atoms.Acceptor count is equal to the total number of atoms that accept electrons. (lespressobarmercurio.com)
  • It was found that NH3 is a virtually universal proton acceptor, meaning that it accepts hydrogen bonds from even some of the most feeble proton donors. (lespressobarmercurio.com)
  • Catalysis of the transfer of a pentosyl group from one compound (donor) to another (acceptor). (planteome.org)
Catalysts3
  • Two notable examples of this catalysis are the fixation of CO 2 to epoxides for the synthesis of cyclic carbonates and the reduction of CO 2 to CO. Recent examples of COFs for the capture of CO 2 will be discussed followed by COF catalysts which use CO 2 as a feedstock for the production of value-added products. (frontiersin.org)
  • For decades, the push toward sustainable catalysis has focused on the development of first-row transition metal catalysts to supplant widespread use of precious metals. (bvsalud.org)
  • First principles investigations of molecule-surface interactions, catalysts on solid surfaces, as well as multiscale simulations of heterogeneous catalysis involving mixed metal oxide surfaces. (lu.se)
Enzyme that catalyses2
  • Such cases exist: for example, a mutase such as phosphoglucomutase catalyses the transfer of a phospho group from one position to another, and isomerase is a more general term for an enzyme that catalyses any one-substrate one-product reaction, such as triosephosphate isomerase . (wikipedia.org)
  • NNMT is a ubiquitously expressed intracellular enzyme that catalyses the methylation of nicotinamide (N-methylation). (guidetopharmacology.org)
Methyl donor3
  • Under the catalysis of methionine adenosyltransferase, Met is converted to S-adenosylmethionine (SAM), which is an important methyl donor in vivo . (hindawi.com)
  • This serves as a methyl donor for homocysteine re-methylation to methionine, which is essential for DNA and protein methylation, neurotransmitter and phospholipid synthesis. (bmj.com)
  • The reaction uses S-adenosyl methionine as the methyl donor. (guidetopharmacology.org)
Acid catalysis2
  • However, chemists have only recently attempted to harness the power of using hydrogen bonds to perform catalysis, and the field is relatively undeveloped compared to research in Lewis acid catalysis. (wikipedia.org)
  • Diphenylborinic acid catalysis enables the direct, stereo- and site-selective coupling of glycosyl donors with ceramide lipids. (researcher-app.com)
Photoredox catalysis2
  • In particular, photoredox catalysis affords facile access to a plethora of transformations that were previously thought to be impossible. (beilstein-journals.org)
  • In some of the explored mutants, the phototriggered electron transfer between triarylamine and Ru( III ) is complete within 10 ns, thus highlighting the potential of such artificial metalloenzymes to perform photoredox catalysis. (rsc.org)
HETEROGENEOUS1
  • Chemists have strategically designed COFs for the purpose of heterogeneous catalysis of gaseous reactants. (frontiersin.org)
Protons3
  • All-organic Z-scheme photoreduction of CO 2 with water as the donor of electrons and protons. (mpg.de)
  • Le complexe de fer avec thiol est un catalyseur ORR efficace avec une sélectivité de 100% pour la production de H2O2 en présence d'un agent réducteur à un électron et de protons. (theses.fr)
  • The chemical molecule that contains protons that are going to be donated is called a hydrogen bond donor. (lespressobarmercurio.com)
Asymmetric5
  • New reactions catalyzed by hydrogen-bond donors are being discovered at an increasing pace, including asymmetric variants of common organic reactions useful for synthesis, such as aldol additions, Diels-Alder cycloadditions and Mannich reactions. (wikipedia.org)
  • With more detailed studies of structure and mechanism in the future, hydrogen-bond catalysis has great potential for enabling new, efficient, selective reactions and promising applications in asymmetric synthesis. (wikipedia.org)
  • His research focuses on the fundamental understanding of electrochemical reactions and organic electrosynthesis including various oxygen-atom functionalization catalysis, asymmetric synthesis, biochemical reactions. (rsc.org)
  • A second part of the program deals with the development (and application in chemical biology) of novel stereoselective synthesis methods and asymmetric catalysis. (noorderlink.nl)
  • The mechanism has been experimentally and theoretically investigated revealing that the control of the selectivity arises from the efficiency of the electron donor system (reducing chemical or applied potential).Another asymmetric diiron(II) complex with an FeCOCp unit has also been synthesized and well characterized in its two forms in MeCN. (theses.fr)
Catalytic4
  • Catalytic amounts of hydrogen-bond donors can promote reactions through a variety of different mechanisms. (wikipedia.org)
  • The position, bonding and dynamics of hydrogen atoms in the catalytic centers of proteins are essential for catalysis. (rcsb.org)
  • This is the first comparison of these hydrogen bonds involving an identical catalytic network, while directly demonstrating how active site electrostatics adapt to the electronic nature of substrates to tune catalysis. (rcsb.org)
  • Thus, this study shows the high donor potential of alcohols in TH under both catalytic and catalyst-free conditions. (catalysis.ru)
Synthesis3
  • Over one third of the chapters have been expanded to incorporate developments since the previous editions, while the chapter on organometallic catalysis in synthesis and production appears for the first time in this form. (wiley-vch.de)
  • The research programme is focused on synthesis, catalysis, functional materials, bio-organic chemistry/chemical biology and systems chemistry/complex molecular systems. (noorderlink.nl)
  • ConspectusHomogeneous catalysis is at the forefront of global efforts to innovate the synthesis of fine chemicals and achieve carbon-neutrality in energy applications. (bvsalud.org)
Organic1
Electron donor4
  • Electron transfer from a biotinylated electron donor to photochemically generated Ru( III ) complexes covalently anchored to streptavidin is demonstrated by means of time-resolved laser spectroscopy. (rsc.org)
  • A biotinylated triarylamine electron donor was added to the Ru( II )-modified streptavidins to afford dyads localized within a streptavidin host. (rsc.org)
  • His Photochemistry research includes themes of Electron donor and Solvatochromism. (research.com)
  • His Photochemistry research integrates issues from Ion, Protonation, Electron donor and Fluorescence. (research.com)
Organometallic1
  • The unit will describe the role of organometallic species in catalysis for selected examples. (bath.ac.uk)
Enantioselective1
  • The required labeled building blocks ( 13 C 2 - l -allylglycine and a related hydroxylated derivative) were prepared via enantioselective phase-transfer catalysis and enantio- and diastereoselective aldol condensation with a chiral auxiliary, respectively, both potentially valuable themselves for other synthetic routes toward labeled (natural) products. (tuwien.ac.at)
Catalyst3
  • In all cases, the close association of the catalyst molecule to substrate also makes hydrogen-bond catalysis a powerful method of inducing enantioselectivity. (wikipedia.org)
  • We recently discovered that phenanthroline could be used as a nucleophilic catalyst to access high yielding and diastereoselective α-1,2-cis glycosides through the coupling of hydroxyl acceptors with α-glycosyl bromide donors. (wayne.edu)
  • The [SNS] ligand, L1, leads to formation of high-spin paramagnetic metal complexes of the type M(L1)2 in which the 6-membered ring thioether donor is hemilabile (M = Mn, Fe, Co). This allows Mn(L1)2 to function as a carbonyl hydroboration catalyst that operates by a novel hydride-free, inner-sphere reaction pathway. (bvsalud.org)
Reaction1
  • Catalysis of the reaction: donor + hydrogen peroxide = oxidized donor + 2 H2O. (ntu.edu.sg)
Acidic3
  • More acidic donors can act as general or specific acids, which activate electrophiles by protonation. (wikipedia.org)
  • These complexes were based on dioxime and diimine frameworks with the intent of binding Lewis acidic metals at the oxime oxygens, at pendant phenolic donors, or at pendant aminediol moieties. (caltech.edu)
  • Sphingomyelinase is an acidic lysosomal hydrolase that catalyses the cleavage of sphingomyelin to phosphoryl choline and ceramide. (medscape.com)
Molecular1
  • Inspired by Nature's principles of molecular assembly, recognition, transport, motion and catalysis, the goal is to exploit the full potential of synthetic chemistry to create new structures and functions. (noorderlink.nl)
Complexes2
  • Early transition metal complexes based on the rigid p-terphenyl framework were designed with a variety of donor sets (Chapter 5 and Appendix B). Chapter 5 details the use of syn dizirconium di[amine bis(phenolate)] complexes for isoselective 1-hexene and propylene homopolymerizations. (caltech.edu)
  • 1-hexene/diene copolymerizations and attempted polymerizations in the presence of ethers and esters with the syn dizirconium di[amine bis(phenolate)] complexes demonstrate the potential for further applications of this system in catalysis. (caltech.edu)
Reactions1
  • The base-free reactions are performed in water and afford excellent yields over 2 h at 70 °C. DFT calculations suggest a proton-shuttle role for the thiolate donor in formation of the initial dicopper σ,π-alkynyl intermediate. (bvsalud.org)
Molecule2
Substitution1
  • The phenanthroline catalysis system is applicable to a number of furanosyl bromide donors to provide the challenging 1,2-cis substitution products in good yield with high anomeric selectivity. (wayne.edu)
Alcohols4
Proteins1
Compound1
  • In these cases, catalysis with hydrogen-bond donors is an attractive strategy since the anionic tetrahedral intermediates are better hydrogen-bond acceptors than the starting compound. (wikipedia.org)
Compounds4
  • I give the previously useful shop Phosphorus Compounds: Advanced Tools in Catalysis and Material with 42(1 difficulties to prevent the scientists great for principles by growing to schematic examinations. (kapitan-eng.com)
  • About TRUUST Neuroimaging conducts an familiar shop Phosphorus Compounds: Advanced Tools in Catalysis and Material standards control computer and research policies studying all higher findings for gestures used into EEG statistical track. (kapitan-eng.com)
  • shop Phosphorus Compounds: Advanced Tools in Catalysis and 2: The peer-reviewed13 or course attempts required to a larger vs. of advantages to test if it is sensory and to further Enter its survey. (kapitan-eng.com)
  • Compounds are said to be hydrogen donors if they contain hydrogens that can be abstracted and are positioned in close proximity to heteroatoms like oxygen, nitrogen, or sulfur. (lespressobarmercurio.com)
Oxygen-atom1
Coordination1
  • Further studies showed L2 undergoes selective Caryl-S bond cleavage upon coordination to a metal with electron-rich phosphine donors, yielding a new (CNS)2- pincer ligand. (bvsalud.org)
Hydrogen atoms1
Group1
  • The utility of the phenanthroline catalysis is expanded to sterically hindered hydroxyl nucleophiles and chemoselective coupling of an alkyl hydroxyl group in the presence of a free C1-hemiacetal functionality. (wayne.edu)
Potential1
  • However, there are several challenges that must be overcome before hydrogen-bond catalysis can achieve its full potential in terms of synthetic utility. (wikipedia.org)
Intermediate1
  • Based on the fact that hydrogen peroxide is generated in both cases (quantitatively or in a 20% amount in chemical and electrochemical catalysis, respectively), it can be proposed that a common intermediate, i.e. the calculated iron-peroxo complex, is generated during catalysis. (theses.fr)
Role1
Found1