The formal intramolecular photoredox reaction initially discovered for the parent 2-(hydroxymethyl)anthraquinone (1) has been extended to include analogs 3-6 in which the oxidizable benzyl alcohol group is significantly further away from the anthraquinone moiety. All of 3-6 undergo a clean and efficient formal intramolecular photoredox reaction in water catalyzed by acid (Phi = 0.1-0.6), in whi...

ion reactions of ketones, quinones, and N-hetero aromatic molecules from alcoholic solvents are 2-3 times smaller than those of the parent molecules, even though the radicals and parent molecules possess nearly the same sizes and the same shapes.17,18 Such an anomalously slow diffusion of the radicals suggests a strong intermolecular interaction between the radicals and the surrounding molecule...

We examined the role of silver and alumina in Ag–alumina catalysts for the selective catalytic reduction (SCR) of NOx by methane in gas streams containing excess oxygen. A cogelation technique was used to prepare Ag–alumina materials with high dispersion of silver even at high metal loadings (>10 wt%) and after air calcination at 650 ◦C. Typically, a part of silver is present as fine nanopartic...

available online at http://meteoritics.org 553 © The Meteoritical Society, 2006. Printed in USA. The formation of plessite in meteoritic metal J. I. GOLDSTEIN1* and J. R. MICHAEL2 1Department of Mechanical and Industrial Engineering, 313 Engineering Lab, University of Massachusetts, 160 Governors Drive, Amherst, Massachusetts 01003, USA 2Materials Characterization Department, Sandia National La...

Organocobalt complexes containing axial haloalkyl groups afford metallacycles of different size by N or O alkylation of the macrocyclic equatorial ligands. The reaction mechanism involves the intramolecular nucleophilic attack of a negatively charged atom of the equatorial ligand on the axial 2 XCH haloalkyl group with simultaneous detachment of a halide ion, X. In imino/oxime and amino/oxime d...

m-Xylene transformation has been studied on as-prepared H-Y and a series of dealuminated Y zeolite catalysts. The conversion of m-xylene was found to increase initially with acidity, however, decreases subsequently. It has been proposed that the high concentration of acid sites in the H-Y catalyst increases paring reaction, in addition to the well-known isomerization and disproportionation path...

Single-stranded DNA molecules have the capacity to adopt catalytically active structures known as DNAzymes, although the fundamental limits of this ability have not been determined. Starting with a parent DNAzyme composed of all four types of standard nucleotides, we conducted a search of the surrounding sequence space to identify functional derivatives with catalytic cores composed of only thr...

In the search for new biologically active molecules, diversity-oriented synthetic strategies break through the limitation of traditional library synthesis by sampling new chemical space. Many natural products can be regarded as intriguing starting points for diversity-oriented synthesis, wherein stereochemically rich core structures may be reorganized into chemotypes that are distinctly differe...

Filial therapy, originally developed by Bernard Guerney (1964), is a form of parent child therapy utilizing child-centered skills and limit setting strategies to improve the parent child relationship and to increase positive child behaviors. Parent Child Interaction Therapy (PCIT), developed by Sheila Eyberg (1988), is an empirically supported treatment for improving parenting skills and decrea...