Chemistry (Scholarly Publications): Recent submissions
Now showing items 661-680 of 931
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Platelets, photosensitizers and PDT
(2013)Photodynamic therapy (PDT) has both direct cell and indirect vascular effects. Both are well established and the latter has given rise to specifically target angiogenesis in PDT treatments. While the vascular effects are ... -
Solvent effect on the nonlinear absorption of 5,10-A2B2 meso substituted porphyrins
(2013)The effect of the solvent on the nonlinear absorptive properties of two series of 5,10-A 2 B 2 porphyrins was investigated with an open Z-scan technique in the ns time regime. The recorded responses, which varied between ... -
Non-enzymatic glucose oxidation at electrocatalytic metal oxide films
(Electrochemical Society, 2013)The electro-oxidation of glucose at nickel hydroxide films is discussed. These films can be electrodeposited using a simple potential multi-cycling procedure. The resulting films exhibit a nanostructured surface ... -
The oxygen evolution reaction at Manganese Oxide films in base: Kinetics and Mechanism
(Electrochemical Society, 2013)Various manganese oxide type Dimensionally Stable Anode (DSA) electrodes were prepared though a simple thermal decomposition technique at different annealing temperatures for their effect on the oxygen evolution reaction ... -
Dimensionally Stable Anodes (DSA) for Electrochemical Water Splitting: Redox Properties, OER Kinetics and Mechanism at RuO2/NiO modified electrodes in aqueous base
(Electrochemical Society, 2013)The RuO2/NiO electrode was found to be extremely effective as a water oxidation catalyst in alkaline conditions. Addition of 25 mol % of RuO2 to a NiO electrode lowered the oxygen evolution reaction (OER) overpotential ... -
Natural reducing agents for electroless nanoparticle deposition: Mild synthesis of metal/carbon nanostructured microspheres
(2013)Composite materials are of interest because they can potentially combine the properties of their respective components in a manner that is useful for specific applications. Here, we report on the use of coffee as a low-cost, ... -
A theoretical study of the interactions of NF3 with neutral ambidentate electron donor and acceptor molecule
(2011)A theoretical study of the complexes (dimers and trimers) formed between nitrogen trifluoride (NF 3 ) and the ambidentate electron donor/acceptor systems HF, FCl, HCN, and HNC has been carried out using DFT ... -
Silyl Nitronate 1,3-Dipolar Cycloaddition Reactions with meso-Tetraarylporphyrins
(2011)Isoxazoline-fused chlorins were obtained in moderate yields from the reaction of silyl nitronates and 5,10,15,20-tetra(pentafluorophenyl)porphyrin in toluene at 85 ?C. -
Formation of Extended Covalently Bonded Ni Porphyrin Networks on the Au(111) Surface
(2011)The growth and ordering of {5,10,15,20-tetrakis(4-bromophenyl)porphyrinato}nickel(II) (NiTBrPP) molecules on the Au(111) surface have been investigated using scanning tunneling microscopy, x-ray absorption, core-level ... -
Extroverted Confusion Linus Pauling, Melvin Calvin and Porphyrin Isomers
(2011)No other modern era chemist has influenced chemistry and molecular biology as much as Professor Linus Pauling (1901?1994) (Fig. 1).[1] In a career spanning seven decades he worked and made important contributions in all ... -
Synthesis and Crystal Structure of a Meso Meso Directly Linked Bisporphyrin
(2011)We report the synthesis and characterization of a meso-meso directly linked bisporphyrin 6 bearing both alkyl and aryl residues. Oxidative fusing results in a mesomeso, ???,???-linked bisporphyrin. The first crystal ... -
Bridging the Gap between Porphyrins and Porphycenes: Substituent-Position-Sensitive Tautomerism and Photophysics in meso-Diphenyloctaethylporphyrins
(2011)henylporphyrin (1) is characterized by an inner cavity with a rectangular shape and small NH???N distances. It resembles porphycene, a constitutional isomer of porphyrin known for its strong intramolecular hydrogen ... -
Synthesis of Unsymmetrical meso-Substituted Porphyrins, 2. Porphyrin Dimers and Arrays
(2011)Current applications of porphyrins in medicine and optics, such as photodynamic therapy or nonlinear absorbers, increasingly require the use of far-red absorbing dyes. Modifications of the porphyrin structure to accommodate ... -
Synthesis of Unsymmetrically meso-Substituted Porphyrins
(2011)The continued development of new medicinal and industrial uses of highly substituted porphyrins, especially in the fields of photodynamic therapy, nonlinear optics and electron transfer systems, has led to a resurgent ... -
Conformational control of cofactors in nature functional tetrapyrrole conformations in the photosynthetic reaction centers of purple bacteria
(2011)Chemically identical tetrapyrrole cofactors such as hemes and chlorophylls participate in functionally diverse biological roles. An analysis of the available protein structural data for the bacteriochlorophylls in the ... -
Lead structures for applications in photodynamic therapy. 3. Temoporfin (Foscan?, 5,10,15,20-Tetra(m-hydroxyphenyl)chlorin), a Second Generation Photosensitizer
(2011)ABSTRACT This review traces the development and study of the second generation photosensitizer 5,10,15,20-tetra(m-hydroxyphenyl)chlorin through to its acceptance and clinical use in modern photodynamic (cancer) therapy ... -
Evidence for the formation of an intermediate complex in the direct metalation of tetra(4-bromophenyl)-porphyrin on the Cu(111) surface
(2011)A strong molecule?surface interaction between free-base-tetra- (4-bromophenyl)-porphyrin and Cu(111) results in a distortion of both the molecule and the underlying copper surface in the vicinity of the molecule. This ... -
Synthesis and evaluation of the europium(III) and zinc(II) complexes as luminescent bioprobes in high content cell-imaging analysis
(2011)Novel phenanthroline derivatives and their europium(III) and zinc(II) complexes have been prepared in up to 92 %. In contrast to the stable zinc complexes, the europium compounds exhibit a strong luminescence in THF ... -
5,10-A2B2-Type meso-Substituted Porphyrins A Unique Class of Porphyrins with a Realigned Dipole Moment
(2011)Abstract: Current applications in porphyrin chemistry require the use of unsymmetrically substituted porphyrins. Many current industrial interests in optics and biomedicine require systems with either push-pull (electron ... -
Stirring the porphyrin alphabet soup functionalization reactions for porphyrins
(2011)Advances in the synthesis of unsymmetrically meso substituted porphyrins are based on the development of new total syntheses and porphyrin functionalization methods. These methods have replaced earlier mixed condensation ...
