Materials Literature
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Three triaminotriazine units bearing two appended porphyrins undergo self-assembly through multiple hydrogen-bonding with three complementary dialkylbarbituric acids yielding a supramolecular macrocycle containing six porphyrins.
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTAryl Ether Dendrimers with an Interior Metalloporphyrin Functionality as a Spectroscopic Probe: Interpenetrating Interaction with Dendritic ImidazolesYoriko Tomoyose, Dong-Lin Jiang, Ren-Hua Jin, Takuzo Aida, Takashi Yamashita, Kazu…
A hexagonal mesoporous phase based on SnO2 is synthesized for the first time by using an anionic surfactant; hexagonal phases of TiO2 are prepared with neutral amine surfactants.
An iron(II) porphyrin 1-methylimidazole (mim) complex covalently encapsulated within a large aryl ether dendritic cage, FeII(mim)2L5, displays reversible dioxygen-binding activity, in which the dioxygen adduct survives over a period of months even in the presence of water, and exhibits a half-life of 50 h upon exposur…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTInter- and Intralayer Energy Transfer in Zirconium Phosphate−Poly(allylamine hydrochloride) Multilayers: An Efficient Photon Antenna and a Spectroscopic Ruler for Self-Assembled Thin FilmsDavid M. Kaschak and Thomas E. MalloukView Author Information Department of Chemi…
An aluminium-based dodecyl sulfate mesophase with a hexagonal structure is synthesized by the homogeneous precipitation method using urea and is thermally deorganized into a hexagonal but less ordered framework structure with a d spacing of 3.4 nm.
A set of α-coupled oligothiophenes, dimer through hexamer, was studied. Each oligomer was terminated with two methyl groups and was substituted with two or four methoxy groups. Electrochemical studies showed that methoxy groups substituted at “inside” β-positions on the terminal rings (positions toward the center of t…
The structures of the transition states and intermediates formed in the water-exchange of hexaaqua complexes of the first row transition elements have been computed with ab initio methods at the Hartree−Fock or CAS-SCF level. As an approximation, water molecules in the second coordination sphere except one, bulk water…
Biological mineralization leads to the development of finely scaled, highly controlled inorganic precipitates in organic matrixes. It was initially thought that this control was mainly exercised through lattice-matching epitaxy between the protein or polysaccharide matrix and the mineral. We discuss the importance of…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTSubphthalocyanines: Novel Targets for Remarkable Second-Order Optical NonlinearitiesA. Sastre, T. Torres, M. A. Díaz-García, F. Agulló-López, C. Dhenaut, S. Brasselet, I. Ledoux, and J. ZyssView Author Information Departments of Organic Chemistry C-I and Physics of Mat…
The phosphate anion chelation properties of several sapphyrin derivatives, namely 3,12,13,22-tetraethyl-8,17-bis[bis(hydroxyethyl)amino)carbonylethyl]-2,7,18,23-tetramethylsapphyrin ( 1 ), 3,12,13,22-tetraethyl-2,7,18,23-tetramethyl-8,17-bis(hydroxypropyl)sapphyrin ( 2 ), and 3,8,12,13,17,22-hexaethyl-2,7,18,23-tetram…
The synthesis and characterization of isocyanide complexes of (porphyrinato)iron(III) species, [(Porph)Fe( t -BuNC) 2 ]ClO 4, Porph = OEP, TPP, are reported. The crystal structures of [(TPP)Fe( t -BuNC) 2 ]ClO 4 and [(OEP)Fe( t -BuNC) 2 ]ClO 4 have been determined. Consistent with the expected effect from the strong π…
The first pentanuclear complexes of formula {Dy[Cu(apox)](2)[Cu(apox)(H(2)O)](2)}[ClO(4)](3).7H(2)O (1), {Ho[Cu(apox)][Cu(apox)(H(2)O)](3)}[PF(6)](3).4.5H(2)O (2), {Gd[Cu(apox)](2)[Cu(apox)(H(2)O)](2)}[ClO(4)](3).7H(2)O (3) and {Gd[Cu(apox)][Cu(apox) (H(2)O)](3)}[PF(6)](3).4.5H(2)O (4) (H(2)apox = N,N'-bis(3-aminoprop…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTRapid Catalytic Oxygenation of Hydrocarbons by Ruthenium Pentafluorophenylporphyrin Complexes: Evidence for the Involvement of a Ru(III) IntermediateJohn T. Groves, Marcella Bonchio, Tommaso Carofiglio, and Kirill ShalyaevView Author Information Department of Chemistry…
Two approaches to the synthesis and structure determination of NaZnPO 4 ·H 2 O, a new open-framework, chiral, hydrated sodium zincophosphate phase, are reported. The ordered, alternating, vertex-sharing ZnO 4 and PO 4 groups in NaZnPO 4 ·H 2 O form a new framework topology, which includes novel 4-ring “squares” and ed…
The use of a novel mixed-valence pentavanadate phosphate cluster as a building block has made possible the low-temperature hydrothermal self-assembly of the new three-dimensional square pyramidal−tetrahedral framework vanadium phosphates [HN(CH 2 CH 2 ) 3 NH]K 1.35 [V 5 O 9 (PO 4 ) 2 ]· x H 2 O ( 1 ) and Cs 3 [V 5 O 9…
This article reports on the structure and mechanical properties of CNx thin films deposited by unbalanced reactive magnetron sputtering of C in N2 discharges. The films were grown on Si(001) substrates kept at temperatures (Ts) between 150 and 600 °C. Depending on Ts, the films contained between 15 and 26 at. % N. X-r…
Bonding in the recently synthesized transition metal pnictide MoNiP 8, which contains an unusual cubic coordination of Mo and unique P 8 building blocks, has been analyzed by means of electronic band structure calculations using the semiempirical extended Hückel tight-binding method. Calculated densities of states sug…
The surface composition of anionic polymerized poly(2-hydroxyethyl methacrylate) (PHEMA) films cast onto glass coverslips was examined with x-ray photoelectron spectroscopy (XPS). The elemental composition determined from a survey scan was 68.3 at. % carbon and 31.7 at. % oxygen. This composition is within experimenta…
Infrared spectra of adsorbates and steady state reaction rates taken in situ during the reduction of NO and coadsorption of CO over a Pt(100) surface are presented. For surface temperatures ranging from 420 to 470 K and an NO pressure of 7.80 × 10 -5 Torr, IR spectra showed an absorption band at 1640−1656 cm -1 that i…