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Browsing CHEM Faculty Publications by Title

Browsing CHEM Faculty Publications by Title

Now showing items 19-38 of 253

Binding, electrochemical activation, and cleavage of DNA by cobalt(II) tetrakis-N-methylpyridyl porphyrin and its beta-pyrrole brominated derivative

Yellappa, Shivaraj; Seetharamappa, Jaldappagari; Rogers, Lisa M.; Chitta, Raghu; Singhal, Ram P.; D'Souza, Francis (American Chemical Society, 2006-11-01)

The binding of nucleic acids by water-soluble cobalt(II) tetrakis-N-methylpyridyl porphyrin, (TMPyP)Co, and its highly electron-deficient derivative cobalt(II) tetrakis-N-methyl pyridyl-beta-octabromoporphyrin, (Br(8)TMPyP)Co, ...
Bionano donor-acceptor hybrids of porphyrin, ssDNA, and semiconductive single-wall carbon nanotubes for electron transfer via porphyrin excitation

D'Souza, Francis; Das, Sushanta K.; Zandler, Melvin E.; Sandanayaka, Atula S. D.; Ito, Osamu (American Chemical Society, 2011-12)

Photoinduced electron transfer in self-assemblies of porphyrins ion-paired with ssDNA wrapped around single-wall carbon nanotubes (SWCNTs) has been reported. To accomplish the three-component hybrids, two kinds of ...
Biosynthetic incorporation of fluorohistidine into proteins in E. coli: a new probe of macromolecular structure

Eichler, Jack F.; Cramer, John C.; Kirk, Kenneth L.; Bann, James G. (John Wiley and Sons, 2005-12-01)
Bis-functionalized fullerene-dibenzo[18]crown-6 conjugate: synthesis and cation-complexation dependent redox behavior

Smith, Phillip M.; McCarty, Amy L.; Nguyen, Nhu Yen; Zandler, Melvin E.; D'Souza, Francis (Royal Society of Chemistry, 2003-07-21)

A one-step synthesis of bis-pyrrolidine functionalized fullerene-dibenzo[18]crown-6 conjugate and its metal cation complexation to the crown ether entity dependent redox behavior is reported.
A Bloembergen-Purcell-Pound 13C NMR relaxation study of the ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate

Carper, W. Robert; Wahlbeck, Phillip G.; Antony, J. H.; Mertens, D.; Dölle, A.; Wasserscheid, Peter (Springer, 2004-03-01)

The molecular structure and rotational motion of the ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF6]) were studied over a wide temperature range using the Bloembergen-Purcell-Pound 13C NMR ...
Borate complexes of benzohydroxamic acid and some of its derivatives

Fields, Alan R.; Daye, Barbara M.; Christian, Robert (Elsevier, 1966-07-01)

Ultraviolet spectrophotometric measurements in dilute aqueous solution give pK(a) values of 8.78, 8.27, 8.96 and 8.68, respectively, for benzohydroxamic, N-phenylbenzohydroxamic, p-methoxybenzohydroxamic and N-methyl-p-m ...
Boronate affinity chromatography

Singhal, Ram P.; DeSilva, S. S. (Springer, 1992-01-01)
Buried solvent determines both anion-binding selectivity and binding stoichiometry with hydrogen-bonding receptors

Burns, Dennis H.; Calderon-Kawasaki, Kenichi E.; Kularatne, Sumith (American Chemical Society, 2005-04-01)

The crystal structure of a tetraurea picket porphyrin-chloride anion complex has previously shown the anion to be situated between two adjacent ureas and hydrogen bonded via four NH protons (J. Am. Chem. Soc. 1998, 120, ...
Characterization of a series of 3-amino-2-phenylpropene derivatives as novel bovine chromaffin vesicular monoamine transporter inhibitors

Perera, Rohan P.; Wimalasena, D. Shyamali; Wimalasena, Kandatege (American Chemical Society, 2003-06-19)

A series of 3-amino-2-phenylpropene (APP) derivatives have been synthesized and characterized as novel competitive inhibitors, with K(i) values in the microM range, for the bovine chromaffin granule membrane monoamine ...
Characterizing the intramolecular H-bond and secondary structure in methylated GlyGlyH+ with H2 predissociation spectroscopy

Leavitt, Christopher M.; Wolk, Arron B.; Kamrath, Michael Z.; Garand, Etienne; Van Stipdonk, Michael J.; Johnson, Mark A. (Springer, 2011-11)

We report vibrational predissociation spectra of the four protonated dipeptides derived from glycine and sarcosine, GlyGlyH(+)center dot(H-2)(1,2), GlySarH(+)center dot(D-2)(2), SarGlyH(+)center dot(H-2)(2), and SarSarH(+)center ...
Charge stabilization in a closely spaced ferrocene-boron dipyrrin-fullerene triad

Wijesinghe, Channa A.; El-Khouly, Mohamed E.; Blakemore, James D.; Zandler, Melvin E.; Fukuzumi, Shunichi; D'Souza, Francis (Royal Society of Chemistry, 2010-05-21)

New molecular triads composed of closely spaced ferrocene-boron dipyrrin-fullerene, 1 and triphenylamine-boron dipyrrin-fullerene, 2 are synthesized, and photoinduced electron transfer leading to charge stabilization is ...
Chiral multisubstrate inhibitors of dopamine beta-monooxygenase: evidence for dual modes of interaction

Wimalasena, Kandatege; Wimalasena, D. Shyamali; Dharmasena, Silpadipathialage; Haines, Donovan C.; Alliston, Kevin R. (American Chemical Society, 1997-06-10)

The electronic and steric constraints of the dopamine beta-monooxygenase (DbetaM; E.C. 1.14.17.1) active site were studied using a series of chiral bisubstrate inhibitors. The (R) and (S) enantiomers of 5-phenyl-2-thiooxazolidone ...
Cluster ions derived from sodium and potassium tetrafluoroborate and their collision induced dissociation in an ion trap mass spectrometer

Van Stipdonk, Michael J.; Ince, M. P.; Perera, B. A.; Martin, J. A. (John Wiley and Sons, 2002-01-01)

Electrospray ionization was used to produce distributions of gas-phase cluster ions from solutions of sodium and potassium tetrafluoroborate. The majority of the cluster species followed the trend (MBF(4))(n)M(+), where ...
Collision-induced dissociation of protonated tetrapeptides containing beta-alanine, gamma-aminobutyric acid, epsilon-aminocaproic acid or 4-aminomethylbenzoic acid residues

Talaty, Erach R.; Cooper, Travis J.; Osburn, Sandra M.; Van Stipdonk, Michael J. (John Wiley and Sons, 2006-01-01)

The influence of the presence and position of a single beta-alanine, gamma-aminobutyric acid, epsilon-aminocaproic acid or 4-aminomethylbenzoic acid residue on the tendency to form b(n)+ -and y(n)+ -type product ions was ...
Comparison of amorphous iridium water-oxidation electrocatalysts prepared from soluble precursors

Blakemore, James D.; Schley, Nathan D.; Kushner-Lenhoff, Maxwell N.; Winter, Andrew M.; D'Souza, Francis; Crabtree, Robert H.; Brudvig, Gary W. (American Chemical Society, 2012-07-16)

Electrodeposition of iridium oxide layers from soluble precursors provides a route to active thin-layer electrocatalysts for use on water-oxidizing anodes. Certain organometallic half-sandwich aqua complexes of iridium ...
Comparison of physical and photophysical properties of monometallic and bimetallic ruthenium(II) complexes containing structurally altered diimine ligands

Macatangay, Ariel; Zheng, Greg Y.; Rillema, D. Paul; Jackman, Donald C.; Merkert, Jon W. (American Chemical Society, 1996-11-06)

The physical and photophysical properties of a series of monometallic, [Ru(bpy)(2)(dmb)](2+), [Ru(bpy)(2)(BPY)](2+), [Ru(bpy)(Obpy)](2+) and [Ru(bpy)(2)(Obpy)](2+), and bimetallic, [{Ru(bpy)(2)}(2)(BPY)](4+) and ...
Comparison of Solid-State and Solution Photophysical Properties of a Platinum(II) Biphenyl Dicarbonyl Complex: A Multiple-State Emission Study

Zheng, Greg Y.; Rillema, D. Paul (American Chemical Society, 1998-03-23)

Pt(bph)(CO)(2), where bph is the biphenyl dianion, displays multiple emission by altering the temperature, solvent, or its state. Emission spectra and emission quantum yields are concentration and excitation wavelength ...
Computational study of iron(II) systems containing ligands with nitrogen heterocyclic groups

Kirgan, Robert A.; Rillema, D. Paul (American Chemical Society, 2007-12-20)

Density functional theory (DFT) calculations show the higher energy HOMO (highest occupied molecular orbital) orbitals of four iron(II) diimine complexes are metal centered and the lower energy LUMO (lowest unoccupied ...
Continuous spectrophotometric assay for ascorbate oxidase based on a novel chromophoric substrate, 2-aminoascorbic acid

Wimalasena, Kandatege; Dharmasena, Silpadipathialage (Elsevier, 1993-04-01)

Recently, we reported the development of a sensitive continuous spectrophotometric assay for the ascorbate-dependent mammalian enzyme dopamine beta-monooxygenase based on the novel chromophoric electron donor 2-aminoascorbic ...
Continuous spectrophotometric assays for dopamine beta-monooxygenase based on two novel electron donors: N,N-dimethyl-1,4-phenylenediamine and 2-aminoascorbic acid

Wimalasena, Kandatege; Wimalasena, D. Shyamali (Elsevier, 1991-09-02)

Based on the novel chromophoric electron donors, N,N-dimethyl-1,4-phenylenediamine (DMPD) and 2-amino-2-deoxy-L-ascorbic acid (2-aminoascorbic acid), two sensitive, convenient, and continuous spectrophotometric assays for ...