Browsing Chemistry and Biochemistry by Title
Now showing items 209-228 of 670
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Electronic energy harvesting multi BODIPY-zinc porphyrin dyads accommodating fullerene as photosynthetic composite of antenna-reaction center
(Royal Society of Chemistry, 2010-07-21)Efficient electronic energy transfer (EET) in the newly synthesized dyads comprised of zinc porphyrin covalently linked to one, two or four numbers of boron dipyrrin (BDP) entities is investigated. Both steady-state and ... -
Electronic structure calculations of fluorohistidine isomers
(American Chemical Society, 2014-08-10)This work assesses the stability and NMR shifts of fluorinated amino acids in different solvents. We have considered the τ and π tautomers for both 2-fluorohistidine (2F-his) and 4-fluorohistidine (4F-his) corresponding ... -
Electronic, Spectral, and Electrochemical Properties of (TPPBr(x)())Zn Where TPPBr(x)() Is the Dianion of beta-Brominated-Pyrrole Tetraphenylporphyrin and x Varies from 0 to 8
(American Chemical Society, 1998-09-07)The electronic, spectral, and electrochemical characterization of (meso-tetraphenylporphyrinato)zinc(II) complexes bearing between 0 and 8 bromo substituents at the beta-pyrrole positions is reported. The investigated ... -
Electropolymerization of Triphenylamine appended Zinc Porphyrin to form Porphyrin-Fullerene dyads at the electrode surface for photochemical studies
(Wichita State University. Graduate School, 2009-05-01)Porphyrins with their attractive chemical properties qualify to seek potential technological applications including solar energy conversion, sensors, catalysts, biomedicine, molecular electronics, and photonics. Many of ... -
Elemental dependence of structurally specific isotopic shifts in high-field ion mobility spectra
(ACS, 2019-02-01)Nearly all molecules incorporate at least one element with stable isotopes, yielding ubiquitous isotopologic envelopes in mass spectra. Those envelopes split in differential or field asymmetric waveform ion mobility (FAIMS) ... -
Elucidation of the collision induced dissociation pathways of water and alcohol coordinated complexes containing the uranyl cation
(Springer, 2003-11-01)Multiple-stage tandem mass spectrometry was used to characterize the dissociation pathways for complexes composed of (1) the uranyl ion, (2) nitrate or hydroxide, and (3) water or alcohol. The complex ions were derived ... -
Enantiomer separations by capillary electrophoresis
(Springer New York, 2016-09-20)Capillary electrophoresis (CE) is a versatile and flexible technique for analytical enantioseparations. This is due to the large variety of chiral selectors as well as the different operation modes including electrokinetic ... -
Enantioselective inhibition of human leukocyte elastase
(Elsevier, 1992-08-15)(RS)-Diethyl-2-benzyl-succinate was resolved using alpha-chymotrypsin. The two enantiomers were then elaborated to yield (S)-(+) and (R)-(-)-3-benzyl-N-[(methyl-sulfonyl)oxy]succinimide and the inhibitory activity of the ... -
Energy transfer followed by electron transfer in a supramolecular Boron Dipyrrin-Zinc Porphyrin-Fullerene
(Wichita State University. Graduate School, 2009-05-01)Photosynthesis, the process of converting light energy into chemical energy, involves two major steps, absorption and transportation of light energy of appropriate wavelength by the antenna light harvesting molecules to ... -
Energy transfer followed by electron transfer in a supramolecular triad composed of boron dipyrrin, zinc porphyrin, and fullerene: a model for the photosynthetic antenna-reaction center complex
(American Chemical Society, 2004-06-30)The first example of a working model of the photosynthetic antenna-reaction center complex, constructed via self-assembled supramolecular methodology, is reported. For this, a supramolecular triad is assembled by axially ... -
Enhanced effect of negative differential thermal resistance in nanoscale confined structure with nanopatterned surfaces
(American Chemical Society, 2020-01-09)A nanoscale confined fluid structure with nanopatterned surface has been investigated by using nonequilibrium molecular dynamics simulations and kinetic theory. The negative differential thermal resistance (NDTR) effect ... -
Enhanced photocurrents via redox modulation by fluoride binding to oxoporphyrinogen in a zinc porphyrin-oxoporphyrinogen surface modified TiO2 supramolecular solar cell
(Royal Society of Chemistry, 2011-06-07)A novel approach for improving photocurrent in a supramolecular solar cell, composed of zinc porphyrin-oxoporphyrinogen (ZnP-OxP) surface-modified TiO(2), by redox tuning through fluoride anion binding to the redox active ... -
Enhancing detection sensitivity for measuring amino neurotransmitters with flow-gated capillary electrophoresis
(Wichita State University, 2020-07)Capillary electrophoresis (CE) commences as a promising technique for analyzing a variety of biological substances and has been used in bioanalytical and biopharmaceutical applications. Flow-gated CE has numerous advantages ... -
Enhancing the performance of an epoxy resin using oligomeric amide additives
(Wichita State University, 2012-05)An antiplasticizer is any chemical that when added, reduces the free volume of a polymer thereby restricting the polymeric chain motions. This type of additive usually increases the modulus and strength but can compromise ... -
Entropy connects water structure and dynamics in protein hydration layer
(Royal Society of Chemistry, 2018-07-03)The enzyme Candida Antarctica lipase B (CALB) serves here as a model for understanding connections among hydration layer dynamics, solvation shell structure, and protein surface structure. The structure and dynamics of ... -
Evaluating electronic structure methods for accurate calculation of F-19 chemical shifts in fluorinated amino acids
(Wiley, 2017-11-15)The ability of electronic structure methods (11 density functionals, HF, and MP2 calculations; two basis sets and two solvation models) to accurately calculate the F-19 chemical shifts of 31 structures of fluorinated amino ... -
Evaluation of the cure state and water content at carn fiber containing composite surfaces
(Wichita State University. Graduate School., 2008-04-25)A technique called ‘Near Infrared diffuse reflectance spectroscopy’ is able to monitor the moisture content in resin rich fiber reinforced composite surfaces and the cure state of resin at the surface of a resin rich fiber ... -
Evidence for a hydrogen abstraction mechanism in P450-catalyzed N-dealkylations
(Royal Society of Chemistry, 2005-01-14)The experimental evidence presented in this manuscript suggest against the widely accepted single electron/proton transfer mechanism for P450 catalyzed N-dealkylations and provides strong support for a hydrogen atom ... -
Evidence that histidine protonation of receptor-bound anthrax protective antigen is a trigger for pore formation
(American Chemical Society, 2010-08-24)The protective antigen (PA) component of the anthrax toxin forms pores within the low pH environment of host endosomes through mechanisms that are poorly understood. It has been proposed that pore formation is dependent ... -
Evolution of electronic and magnetic properties in the topological semimetal SmSb$_x$Te$_{2-x}$
(American Physical Society, 2022-04-21)The ZrSiS-Type materials have attracted intensive attention due to the existence of various topological fermions. The magnetic version of the ZrSiS-Type materials, LnSbTe (Ln=lanthanides), is an ideal candidate to explore ...