Chemistry (Scholarly Publications): Recent submissions
Now showing items 861-880 of 931
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Bis[anhydro-meso-rhodochlorinato XV methyl ester)zinc(II)]
(International Union of Crystallography, 1997)The title compound bis[(methyl 8,13-diethyl-2,21,22,23-tetrahydro- 3,7,12,17-tetramethyl-23-oxo-3H-benzo[at]porphyrin-18-carboxylato-Kappa4N)- zinc(II)], [Zn(C33H34N4O3)]2, has similar structural characteristics to the ... -
Structure and Conformation of Photosynthetic Pigments and Related Compounds. 10. Comparison of a Phytochlorin and Phytoporphyrin Derived from Chlorophyll a
(International Union of Crystallography, 1997)The crystal and molecular structures of 17-decarboxyethyl-131-deoxo-17-propylphytochlorin, C33H40N4, (1), and phytoporphyrin methyl ester, C34H36N4O3, (2), are compared. Compound (1) shows structural parameters similar to ... -
Structure and conformation of photosynthetic pigments and related compounds. 13. Identification of localized vibrational modes in chlorophyll a derivatives
(2009)A Resonance Raman investigation of chlorophyll a and meso-chlorinated and ring V hydroxylated derivatives and pheophytins reveals localized vibrational modes in the chlorophyll series. Both chlorination and hydroxylation ... -
An X-ray absorption and photoemission study of the electronic structure of Ni porphyrins and Ni N-confused porphyrin
(2008)Investigations of chemical bonding and electronic structure features for polycrystalline (porphyrinato)nickel (II) (NiP, the simplest Ni porphyrin), (5,10,15,20-tetraphenylporphyrinato)nickel (II) (NiTPP) and (2-aza-2 ... -
Self-assembly of Ni(II) porphine molecules on the Ag/Si(111)-(root 3 x root 3) R30 degrees surface studied by STM/STS and LEED
(2008)The room-temperature growth and ordering of (porphyrinato)nickel(II) (nickel(II) porphine, NiP) molecules on the Ag/Si(111)- (root 3 x root 3) R30 degrees surface have been investigated using scanning tunnelling ... -
Structure and Conformation of Photosynthetic Pigments and Related Compounds. 11. 5,10,15,20-Tetrabutylbacteriochlorin
(International Union of Crystallography, 1998)The structure of the title compound, C36H50N4, is the first example of a tetra-meso-substituted free-base bacteriochlorin (2,3,12,13-tetrahydroporphyrin). While general structural characteristics are similar to other ... -
7-Nitro-5,10,15,20-tetraphenylporphyrin Dichloromethane Solvate
(International Union of Crystallography, 1998)The title compound shows significant conformational distortion in the vicinity of the [beta]-nitro group. This is attributed to steric interaction between a meso-phenyl and the [beta]-nitro group. The overall degree of ... -
Dibenzyl 5-(2-chloroethyl)-3,7-diethyl-2,8-dimethyldipyrromethane-1,9-dicarboxylate
(2005)The structure of the title compound [systematic name: dibenzyl 3,3'-diethyl-4,4'-dimethyl-2,2'-(3-chloropropane-1,1-diyl)dipyrrole-5,5'-dicarboxylate], C33H37ClN2O4, was determined by single-crystal X-ray diffraction at ... -
Hydrogen bonding pattern in six derivatives of 2,4-dimethylpyrrole
(2005)The crystal and molecular structures of 4-ethyl-3,5-dimethylpyrrole-2-carbaldehyde, C10H15NO, (I), benzyl 3,5-dimethylpyrrole-2-carboxylate, C14H15NO2, (II), benzyl 4-acetyl-3,5-dimethylpyrrole-2-carboxylate, C16H17NO3, ... -
Chloro(2,3,7,8,12,13,17,18-octaethylporphyrinato)iron(III)
(2005)The molecular structure of the title compound, [Fe(C36H44N4)Cl], was determined by single-crystal X-ray diffraction at 130 K. The compound is characterized by an average Fe?N bond length of 2.071 (2) A E and an Fe?Cl ... -
Ethyl 4-benzyloxycarbonyl-5-[2,2-bis(benzyloxycarbonyl)vinyl]-3-methylpyrrole-2-carboxylate
(2006)The crystal structure of the title compound, C34H31NO8, is stabilized by intramolecular C-H O and N-H O hydrogen bonds, intermolecular C-H O hydrogen bonds, and C-H pi and pi-pi interactions. -
N-[4-(Di-2-pyrrolylmethyl)phenyl]acetamide
(2007)The crystal structure of the title compound, C17H17N3O, shows the formation of infinite chains of molecules that are linked via hydrogen bonds involving the acetamide group. The carbonyl O atom forms hydrogen bonds with ... -
Benzyl 4-ethyl-3-methyl-5-(phthalimidomethyl)pyrrole-2-carboxylate
(2007)The title compound, C24H22N2O4, forms weak inter- and intramolecular N?H O hydrogen bonds. Additional intermolecular C?H O interactions give rise to a threedimensional network in the crystal structure. -
A2B2-type push-pull porphyrins as reverse saturable and saturable absorbers
(2007)A2B2-type push?pull porphyrins with a strong intramolecular dipole moment have been prepared via Heck and Suzuki coupling reactions as novel materials for use in nonlinear optics (NLO); they display saturable (SA) and ... -
Transparent ultrathin conducting carbon films
(2010)Ultrathin conductive carbon layers (UCCLs) were created by spin coating resists and subsequently converting them to conductive films by pyrolysis. Homogeneous layers as thin as 3 nm with nearly atomically smooth surfaces ... -
Thin film pyrolytic carbon electrodes: A new class of carbon electrode for electroanalytical sensing applications
(2010)This communication describes the electrochemical properties of thin pyrolytic carbon (PyC) films created using a reliable, non-catalytic chemical vapour deposition (CVD) process. After deposition, the electron transfer ... -
Improvement of Mechanical Properties of Graphene Oxide / Poly(allylamine) Composites by Chemical Crosslinking
(2010)Graphite oxide was prepared by oxidation of graphite using the Hummers method, and its ultrasonication in water yielded dispersed graphene oxide (GO) sheets. These sheets were then crosslinked with a water soluble polymer, ... -
The difference one ligand atom makes an altered oxygen transfer reaction mechanism caused by an exchange of selenium for sulfur
(Elsevier, 2010)The influence of sulfur versus selenium coordination to molybdenum on the oxo transfer reaction mechanisms of functional models for oxidoreductases has been studied. The solution structure of the dimeric molybdenum compound ... -
Site-Specific Evolution of Surface Stress during the Room-Temperature Oxidation of the Si(111)-(7x7) Surface.
(2010)The reaction of molecular oxygen with the Si(111)-7?7 surface is investigated at room temperature using in situ scanning tunneling microscopy and surface stress measurements to reveal the quantitative relationship between ... -
Lanthanide macrocyclic quinolyl conjugates as luminescent molecular switches and integrated logic gates using H+ and O2 as inputs
(2009)The design and synthesis of 1Tb, a Tb(III) quinoline?cyclen based complex, are described. The results from the photophysical investigation of 1Tb are compared with the results observed from its Eu(III) analogue, 1Eu. The ...
