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Showing 25 to 36 of 845 entries
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A rodlike organogelator: fibrous aggregation of azobenzene derivatives with a syn-chiral carbonate moiety.

Chemical communications (Cambridge, England)

Mamiya J, Kanie K, Hiyama T, Ikeda T, Kato T.
PMID: 12271650
Chem Commun (Camb). 2002 Sep 07;(17):1870-1. doi: 10.1039/b205072b.

A chiral azobenzene derivative containing a cyclic syn-carbonate moiety functions as a gelator for various organic solvents; the dipole-dipole interaction drives the fibrous self-assembly of the rodlike gelator.

Twinning by reticular pseudo-merohedry in trigonal, tetragonal and hexagonal crystals.

Acta crystallographica. Section A, Foundations of crystallography

Grimmer H, Kunze K.
PMID: 15103165
Acta Crystallogr A. 2004 May;60:220-32. doi: 10.1107/S0108767304006695. Epub 2004 Apr 22.

Twin laws for trigonal, tetragonal and hexagonal crystals describing twins with principal axes inclined by an angle Phi > 0 are analysed. Twins by reticular merohedry (i.e. obliquity delta = 0) are possible only for certain values s of...

Anion-perturbed magnetic slow relaxation in planar {Dy4} clusters.

Inorganic chemistry

Zheng YZ, Lan Y, Anson CE, Powell AK.
PMID: 18986136
Inorg Chem. 2008 Dec 01;47(23):10813-5. doi: 10.1021/ic8016722.

Two planar tetranuclear dysprosium(III) complexes, [Dy(4)(mu(3)-OH)(2)(hmmpH)(2)(hmmp)(2)(Cl)(4)].3MeCN.MeOH (1) and [Dy(4)(mu(3)-OH)(2)(hmmpH)(2)(hmmp)(2)(N(3))(4)].4MeOH (2) {hmmpH(2) = 2-[(2-hydroxyethylimino)methyl]-6-methoxyphenol}, which exhibit an anion-dependent magnetic slow relaxation behavior, have been synthesized by in situ condensation of o-vanillin and 2-aminoethanol. The higher energy barrier observed in 2...

Supramolecular coordination assemblies of dinuclear Fe(III) complexes.

Angewandte Chemie (International ed. in English)

Schmitt W, Hill JP, Juanico MP, Caneschi A, Costantino F, Anson CE, Powell AK.
PMID: 15954155
Angew Chem Int Ed Engl. 2005 Jul 04;44(27):4187-92. doi: 10.1002/anie.200500516.

No abstract available.

Structure and magnetic properties of a giant Cu44II aggregate which packs with a zeotypic superstructure.

Inorganic chemistry

Murugesu M, Clérac R, Anson CE, Powell AK.
PMID: 15530072
Inorg Chem. 2004 Nov 15;43(23):7269-71. doi: 10.1021/ic0487171.

Reaction of Cu(II) and the aminopolycarboxylate nitrilotripropionic acid (H(3)ntp) in water leads to the formation of [Cu(44)(mu(8)-Br)(2)(mu(3)-OH)(36)(mu-OH)(4)(ntp)(12)Br(8)(OH(2))(28)]Br(2).81H(2)O. The Cu(44) aggregates have a central inorganic core corresponding to [Cu(24)(mu(8)-Br)(2)(mu(3)-OH)(24)(mu-OH)(8)](14+) anchored on two bromide anions, and this is encased in a...

Thermolysis of a hybrid organic-inorganic supramolecular coordination assembly: templating the formation of nanostructured fibrous materials and carbon-based microcapsules.

Angewandte Chemie (International ed. in English)

Schmitt W, Hill JP, Malik S, Volkert CA, Ichinose I, Anson CE, Powell AK.
PMID: 16224754
Angew Chem Int Ed Engl. 2005 Nov 04;44(43):7048-53. doi: 10.1002/anie.200501748.

No abstract available.

Imaging the dynamics of reactions between Cl atoms and the cyclic ethers oxirane and oxetane.

The journal of physical chemistry. A

Pearce JK, Retail B, Greaves SJ, Rose RA, Orr-Ewing AJ.
PMID: 18052051
J Phys Chem A. 2007 Dec 27;111(51):13296-304. doi: 10.1021/jp0773684. Epub 2007 Dec 01.

Direct current slice velocity map ion images of the HCl(nu' = 0, J') products from the photoinitiated reactions of ground state Cl atoms with ethane, oxirane (c-C2H4O), and oxetane (c-C3H6O), at respective mean collision energies of 5.5, 6.5, and...

A convenient and general iron-catalyzed hydrosilylation of aldehydes.

Organic letters

Shaikh NS, Junge K, Beller M.
PMID: 18044905
Org Lett. 2007 Dec 20;9(26):5429-32. doi: 10.1021/ol7021802. Epub 2007 Nov 29.

A general and highly chemoselective hydrosilylation of aldehydes using iron catalysts is reported. Fe(OAc)2 in the presence of tricyclohexylphosphine as ligand and polymethylhydrosiloxane (PMHS) as an economical hydride source forms an efficient catalyst system for the hydrosilylation of a...

Assessment of the anisotropy in the molecule Mn19 with a high-spin ground state S = 83/2 by 35 GHz electron paramagnetic resonance.

Inorganic chemistry

Waldmann O, Ako AM, Güdel HU, Powell AK.
PMID: 18393411
Inorg Chem. 2008 May 05;47(9):3486-8. doi: 10.1021/ic800213w. Epub 2008 Apr 05.

35 GHz electron paramagnetic resonance experiments on a powder sample of the magnetic molecule Mn 19 with a high-spin ground state S = 83/2 are presented. At low temperatures, the data are well described by the simulated spectra for...

Development of a novel solid phase extraction method for the analysis of bacterial quinones in activated sludge with a higher reliability.

Journal of bioscience and bioengineering

Hu HY, Fujie K, Urano K.
PMID: 16232485
J Biosci Bioeng. 1999;87(3):378-82. doi: 10.1016/s1389-1723(99)80049-8.

A novel analytical method for analysis of microbial quinones in activated sludge sample was developed with improved reliability compared to the conventional method. The operating conditions for the extraction of quinones from activated sludge sample with a methanol-chloroform mixture...

The building block approach to extended solids: 3,5-pyrazoledicarboxylate coordination compounds of increasing dimensionality.

Dalton transactions (Cambridge, England : 2003)

King P, Clérac R, Anson CE, Powell AK.
PMID: 15252469
Dalton Trans. 2004 Mar 21;(6):852-61. doi: 10.1039/b315067d. Epub 2004 Feb 24.

A series of M(II) complexes with the ligand 3,5-pyrazoledicarboxylic acid (H3dcp) has been synthesised mainly via hydrothermal reactions and their structures have been characterised. Simple mononuclear [Ni(Hdcp)(H2O)4] (1), Na2(mu-H2O)2(H2O)8[Ni(Hdcp)2(H2O)2] (2), [M(H2dcp)2(H2O)2] x 2H2O [M = Co (3), Zn (4)...

Inelastic neutron scattering on an Mn10 supertetrahedron: assessment of exchange coupling constants, ferromagnetic spin waves and an analogy to the Hückel method.

Chemistry (Weinheim an der Bergstrasse, Germany)

Stuiber S, Wu G, Nehrkorn J, Dreiser J, Lan Y, Novitchi G, Anson CE, Unruh T, Powell AK, Waldmann O.
PMID: 21732439
Chemistry. 2011 Aug 08;17(33):9094-106. doi: 10.1002/chem.201100500. Epub 2011 Jul 05.

The synthesis, crystal structure and magnetic characterisation by magnetisation and inelastic neutron scattering (INS) of a mixed-valent Mn(10) supertetrahedral aggregate [Mn(III)(6)Mn(II)(4)(μ(4)-O)(4)(μ(3)-N(3))(3)(μ(3)-Br)(Hmpt)(6)(Br)]Br(0.7)(N(3))(0.3)·2MeOH·3MeCN (1) (H(3)mpt=3-methylpentan-1,3,5-triol) is reported. The magnetic core of the molecule can be described as an octahedron of six...

Showing 25 to 36 of 845 entries