All Outputs (3415)

Trimethyltetrathiafulvalene bearing an N-methylpyridinium substituent: Synthesis, crystal structures, and charge transfer properties
Journal Article
Moore, A., Batsanov, A., Bryce, M., Howard, J., Khodorkovsky, V., Shapiro, L., & Shames, A. (online). Trimethyltetrathiafulvalene bearing an N-methylpyridinium substituent: Synthesis, crystal structures, and charge transfer properties. European Journal of Organic Chemistry, 73-78

The synthesis of 4,4',5-trimethyl-5'-(4-pyridyl)tetrathiafulva- lene (3), has been accomplished by reaction of the stannylated precursor 2 with 4-bromopyridine. Alkylation of 3 affords the N-methylpyridinium salt 4 which displays intramolecular charg... Read More about Trimethyltetrathiafulvalene bearing an N-methylpyridinium substituent: Synthesis, crystal structures, and charge transfer properties.

DNA binding studies of cationic lanthanide complexes bearing a phenanthridinium group
Journal Article
Bobba, G., Kean, S., Parker, D., Beeby, A., & Baker, G. (online). DNA binding studies of cationic lanthanide complexes bearing a phenanthridinium group. Journal of the Chemical Society-Perkin Transactions 2, 1738-1741

The binding of tetracationic Lambda- and Delta -europium complexes of tetraamide and triamide ligands incorporating an N-methylphenanthridinium group to calf-thymus DNA, poly(dGdC) and super-coiled plasmid DNA has been monitored by absorption, lumine... Read More about DNA binding studies of cationic lanthanide complexes bearing a phenanthridinium group.

Synthesis of 2-heteroaryl-3-hydroxypyridines by ring expansion reactions of 2-acylfurans with ammonia
Journal Article
Chubb, R., Bryce, M., & Tarbit, B. (online). Synthesis of 2-heteroaryl-3-hydroxypyridines by ring expansion reactions of 2-acylfurans with ammonia. Journal of the Chemical Society. Perkin transactions 1, 1853-1854

A straightforward and versatile synthesis of 2-heteroaryl-3- hydroxypyridine derivatives is described by the one-step reaction of 2-acylfurans with ammonia at 150 degreesC.

Crown-annelated 9,10-bis(1,3-dithiol-2-ylidene)-9,10- dihydroanthracene derivatives as cation sensors: Synthesis, X- ray crystal structures, voltammetric and spectroscopic monitoring of metal complexation
Journal Article
Bryce, M., Batsanov, A., Finn, T., Hansen, T., Moore, A., Howard, J., Kamenjicki, M., Lednev, I., & Asher, S. (online). Crown-annelated 9,10-bis(1,3-dithiol-2-ylidene)-9,10- dihydroanthracene derivatives as cation sensors: Synthesis, X- ray crystal structures, voltammetric and spectroscopic monitoring of metal complexation. European Journal of Organic Chemistry, 933-940

The synthesis of O4S2-crown annelated derivatives of 9,10- bis(1,3-dithiol-2-ylidene)-9,10-dihydroanthracene using the novel Horner-Wadsworth-Emmons reagent 7 is reported. The bis- and mono-crown systems 9 and 12 function as efficient Ligands in the... Read More about Crown-annelated 9,10-bis(1,3-dithiol-2-ylidene)-9,10- dihydroanthracene derivatives as cation sensors: Synthesis, X- ray crystal structures, voltammetric and spectroscopic monitoring of metal complexation.

Sensitised luminescence from phenanthridine appended lanthanide complexes: analysis of triplet mediated energy transfer processes in terbium, europium and neodymium complexes
Journal Article
Beeby, A., Faulkner, S., Parker, D., & Williams, J. (online). Sensitised luminescence from phenanthridine appended lanthanide complexes: analysis of triplet mediated energy transfer processes in terbium, europium and neodymium complexes. Journal of the Chemical Society-Perkin Transactions 2, 1268-1273

Time resolved luminescence spectroscopy and laser flash photolysis have been used to probe the energy transfer processes in the europium, neodymium and terbium complexes of ligand, 1. The ligand, chosen because of the high kinetic stability of lantha... Read More about Sensitised luminescence from phenanthridine appended lanthanide complexes: analysis of triplet mediated energy transfer processes in terbium, europium and neodymium complexes.

Ab initio structure determination of BiPb2VO6 from powder diffraction data
Journal Article
Evans, I., Howard, J., Withers, R., & Evans, J. (online). Ab initio structure determination of BiPb2VO6 from powder diffraction data. Chemical Communications, 1984-1985

The crystal structure of BiPb2VO6 has been determined from powder diffraction data using a combination of direct methods and the novel approach of applying simulated annealing methods simultaneously to X-ray and neutron data; BiPb2VO6 is a polar, non... Read More about Ab initio structure determination of BiPb2VO6 from powder diffraction data.

Synthesis, structures and nonlinear optical properties of novel D-pi-A chromophores: Intramolecular charge transfer from 1,3- dithiole or ferrocene moieties to polynitrofluorene or dicyanomethylene moieties through conjugated linkers
Journal Article
Moore, A., Chesney, A., Bryce, M., Batsanov, A., Kelly, J., Howard, J., Perepichka, I., Perepichka, D., Meshulam, G., Berkovic, G., Kotler, Z., Mazor, R., & Khodorkovsky, V. (online). Synthesis, structures and nonlinear optical properties of novel D-pi-A chromophores: Intramolecular charge transfer from 1,3- dithiole or ferrocene moieties to polynitrofluorene or dicyanomethylene moieties through conjugated linkers. European Journal of Organic Chemistry, 2671-2687

Electron donor-pi -acceptor chromophores 5, 9, 11, 18-20, 21, 22, 27, 28a, 28c, 31, 32, 34-36, 38a-c, 41a, 41c, and 42 have been synthesised. The donor units are 1,3-dithiole and ferrocene; conjugated ethylenic, phenyl, phenylenevinylene, thienyl, bi... Read More about Synthesis, structures and nonlinear optical properties of novel D-pi-A chromophores: Intramolecular charge transfer from 1,3- dithiole or ferrocene moieties to polynitrofluorene or dicyanomethylene moieties through conjugated linkers.

The effect of additive aggregation state on controlling crystallization. Crystallization of L-asparagine monohydrate in the presence of carboxylic acid functionality additives
Journal Article
Cooper, S. (online). The effect of additive aggregation state on controlling crystallization. Crystallization of L-asparagine monohydrate in the presence of carboxylic acid functionality additives. CrystEngComm, art. no.-56

L-Asparagine monohydrate crystals grown from 100-300% supersaturated solutions in the presence of 1-20 mg ml(-1) polyacrylic acid exhibit a needle-like morphology, instead of their normal prismatic morphology. A similar effect is observed for crystal... Read More about The effect of additive aggregation state on controlling crystallization. Crystallization of L-asparagine monohydrate in the presence of carboxylic acid functionality additives.

NMR and chiroptical examination of the diastereoisomers of (S)-Eu-EOB-DTPA
Journal Article
Thompson, N., Parker, D., Schmitt-Willich, H., Sulzle, D., Muller, G., & Riehl, J. (online). NMR and chiroptical examination of the diastereoisomers of (S)-Eu-EOB-DTPA. Dalton Transactions, 1892-1895

The solution structure of the diastereoisomers of (S)-Eu-EOB-DTPA has been analysed by H-1 NMR, CD and CPL spectroscopy. Two major species exist which possess very similar 1H NMR paramagnetic shifts and emission spectra, consistent with a 9-coordinat... Read More about NMR and chiroptical examination of the diastereoisomers of (S)-Eu-EOB-DTPA.

Synthesis of a europium complex for anion-sensing involving regioselective substitution of cyclen
Journal Article
Yu, J., & Parker, D. (online). Synthesis of a europium complex for anion-sensing involving regioselective substitution of cyclen. European Journal of Organic Chemistry, 4249-4252

A regioselective synthetic route that allows the construction of tri-functionally substituted cyclen is described. This facilitates the synthesis of a europium complex that exhibits a good photoresponse to malate, forming the basis of a chemoselectiv... Read More about Synthesis of a europium complex for anion-sensing involving regioselective substitution of cyclen.

An improved synthesis and structural characterisation of 2-(4-acetylthiophenylethynyl)-4-nitro-5-phenylethynylaniline: The molecule showing high negative differential resistance (NDR)
Journal Article
Wang, C., Batsanov, A., Bryce, M., & Sage, I. (online). An improved synthesis and structural characterisation of 2-(4-acetylthiophenylethynyl)-4-nitro-5-phenylethynylaniline: The molecule showing high negative differential resistance (NDR). Synthesis: Journal of Synthetic Organic Chemistry, 2089-2095

2-(4-Acetylthiophenylethynyl)-4-nitro-5-phenyl-ethynylaniline (11) has been synthesised by an improved route, which has many advantages over the literature procedure. A key intermediate is 2-ethynyl-4-nitro-5-phenylethynylaniline (6) which is obtaine... Read More about An improved synthesis and structural characterisation of 2-(4-acetylthiophenylethynyl)-4-nitro-5-phenylethynylaniline: The molecule showing high negative differential resistance (NDR).

Polyene natural products
Journal Article
Thirsk, C., & Whiting, A. (online). Polyene natural products. Journal of the Chemical Society. Perkin transactions 1, 999-1023

Synthesis and luminescence properties of a kinetically stable dinuclear ytterbium complex with differentiated binding sites
Journal Article
Pope, S., Kenwright, A., Heath, S., & Faulkner, S. (online). Synthesis and luminescence properties of a kinetically stable dinuclear ytterbium complex with differentiated binding sites. Chemical Communications, 1550-1551

The complex Yb2L contains two DO3A units separated by a phenol bridging group and gives time-resolved luminescence spectra in solution consistent with the presence of two types of binding site.

Practical syntheses of N-hexylcarbazol-2-yl- and -3-yl-boronic acids, their cross-coupled products and a derived tris-cyclometalated (pyridin-2-yl)carbazole iridium(III) complex
Journal Article
Tavasli, M., Bettington, S., Bryce, M., Batsanov, A., & Monkman, A. (online). Practical syntheses of N-hexylcarbazol-2-yl- and -3-yl-boronic acids, their cross-coupled products and a derived tris-cyclometalated (pyridin-2-yl)carbazole iridium(III) complex. Synthesis: Journal of Synthetic Organic Chemistry, 1619-1624

The syntheses of N-hcxylcarbazol-2-yl- and -3-yl-boronic acids (1 and 2) are described on a ca. 7 g scale, starting from commercially available 2,5-dibromonitrobenzene (4) and carbazole (11), respectively. Compounds I and 2 underwent efficient pallad... Read More about Practical syntheses of N-hexylcarbazol-2-yl- and -3-yl-boronic acids, their cross-coupled products and a derived tris-cyclometalated (pyridin-2-yl)carbazole iridium(III) complex.

New shelf-stable halo- and alkoxy-substituted pyridylboronic acids and their Suzuki cross-coupling reactions to yield heteroarylpyridines
Journal Article
Parry, P., Bryce, M., & Tarbit, B. (online). New shelf-stable halo- and alkoxy-substituted pyridylboronic acids and their Suzuki cross-coupling reactions to yield heteroarylpyridines. Synthesis: Journal of Synthetic Organic Chemistry, 1035-1038

New shelf-stable pyridylboronic acids have been synthesized: bromine-lithium exchange followed by reaction with triiso-propylborate (TEPB) yielded 2-fluoro-5-pyridylboronic acid (4), 3-bromo-5-pyridylboronic acid (5) and 2-ethoxy-5-pyridylboronic aci... Read More about New shelf-stable halo- and alkoxy-substituted pyridylboronic acids and their Suzuki cross-coupling reactions to yield heteroarylpyridines.

The Design, Synthesis and Characterisation of Channel-Forming Peptides
Journal Article
Sanderson, J., & Yazdani, S. (online). The Design, Synthesis and Characterisation of Channel-Forming Peptides. Chemical Communications, 1154-1155. https://doi.org/10.1039/b203046b

Synthetic peptides designed using criteria derived from statistical analyses of beta-barrel membrane proteins form channels in synthetic membranes at very low peptide:lipid ratios.

A novel scandium ortho-methoxynitrosobenzene-dimer complex: mechanistic implications for the nitroso-Diels-Alder reaction
Journal Article
Lightfoot, A., Pritchard, R., Wan, H., Warren, J., & Whiting, A. (online). A novel scandium ortho-methoxynitrosobenzene-dimer complex: mechanistic implications for the nitroso-Diels-Alder reaction. Chemical Communications, 2072-2073

Arylnitroso dienophiles exist in equilibrium with their dimeric counterparts, which in turn form stable bidentate complexes with scandium(III) triflate and react with cyclohexadiene to give the corresponding Diels-Alder adduct at the same rate as the... Read More about A novel scandium ortho-methoxynitrosobenzene-dimer complex: mechanistic implications for the nitroso-Diels-Alder reaction.

The development and application of ruthenium catalysed oxidations of a hydroxamic acid and in situ Diels-Alder trapping of the acyl nitroso derivative
Journal Article
Flower, K., Lightfoot, A., Wan, H., & Whiting, A. (online). The development and application of ruthenium catalysed oxidations of a hydroxamic acid and in situ Diels-Alder trapping of the acyl nitroso derivative. Journal of the Chemical Society. Perkin transactions 1, 2058-2064

Ruthenium(II) complexes can be used to oxidise N-Boc-hydroxylamine in the presence of tert-butyl hydroperoxide (TBHP) to the corresponding nitroso dienophile, which is trapped by cyclohexa-1,3-diene as the hetero-Diels-Alder adduct. Direct evidence h... Read More about The development and application of ruthenium catalysed oxidations of a hydroxamic acid and in situ Diels-Alder trapping of the acyl nitroso derivative.

The oxidative addition of a chlorophosphine to Pd-0: formation and characterisation of a 42-electron triangulo palladium cluster
Journal Article
Dyer, P., Fawcett, J., Hanton, M., Mingos, D., & Williamson, A. (online). The oxidative addition of a chlorophosphine to Pd-0: formation and characterisation of a 42-electron triangulo palladium cluster. Dalton Transactions, 2400-2401

The reactions that lead to the formation of the 42-electron cluster [PdCl{P(NPr2i)(2)}](3) from various sources of the {P(NPr2i)(2)} moiety are investigated, and the structure of the triangulo cluster confirmed by X-ray crystallography.

Efficient relaxivity enhancement in dendritic gadolinium complexes: effective motional coupling in medium molecular weight conjugates
Journal Article
Fulton, D., O'Halloran, M., Parker, D., Senanayake, K., Botta, M., & Aime, S. (online). Efficient relaxivity enhancement in dendritic gadolinium complexes: effective motional coupling in medium molecular weight conjugates. Chemical Communications, 474-476

Enhancement of the relaxivities of Gd-based MRI contrast agents is achieved by placing the metal ion at the barycentre of the molecular complex in order to improve motional coupling.