All Outputs (57)

Continuous N-alkylation reactions of amino alcohols using γ-Al2O3 and supercritical CO2: unexpected formation of cyclic ureas and urethanes by reaction with CO2 (2017)
Journal Article
Streng, E. S., Lee, D. S., George, M. W., & Poliakoff, M. (2017). Continuous N-alkylation reactions of amino alcohols using γ-Al2O3 and supercritical CO2: unexpected formation of cyclic ureas and urethanes by reaction with CO2. Beilstein Journal of Organic Chemistry, 13, https://doi.org/10.3762/bjoc.13.36

The use of γ-Al2O3 as a heterogeneous catalyst in scCO2, has be successfully applied to the amination of alcohols for the synthesis of N-alkylated heterocycles. The optimal reaction conditions (temperature and substrate flow rate) were determined usi... Read More about Continuous N-alkylation reactions of amino alcohols using γ-Al2O3 and supercritical CO2: unexpected formation of cyclic ureas and urethanes by reaction with CO2.

‘Ghost’ stories: sociocultural factors influencing tuberculosis treatment adherence in Ghana (2016)
Journal Article
Salifu, Y., Eliason, C., & Mensah, G. (2016). ‘Ghost’ stories: sociocultural factors influencing tuberculosis treatment adherence in Ghana. Primary Health Care, 26(10), 34-41. https://doi.org/10.7748/phc.2016.e1159

Background: Non-adherence to treatment is a major problem in tuberculosis (TB) control and leads to adverse outcomes and increased morbidity and mortality.
Aim: To explore the experiences of TB patients taking anti-TB drugs in Ghana to improve treat... Read More about ‘Ghost’ stories: sociocultural factors influencing tuberculosis treatment adherence in Ghana.

Photochemistry of framework-supported M(diimine)(CO)₃X complexes in 3D Lithium-Carboxylate metal−organic frameworks: monitoring the effect of framework cations (2016)
Journal Article
Reade, T. J., Murphy, T. S., Calladine, J. A., Horvath, R., Clark, I. P., Greetham, G. M., Towrie, M., Lewis, W., George, M. W., & Champness, N. R. (2017). Photochemistry of framework-supported M(diimine)(CO)₃X complexes in 3D Lithium-Carboxylate metal−organic frameworks: monitoring the effect of framework cations. Philosophical Transactions A: Mathematical, Physical and Engineering Sciences, 375(2084), https://doi.org/10.1098/rsta.2016.0033

The structures and photochemical behaviour of two new metal-organic frameworks are reported. Reaction of Re(2,2ʹ-bipyʹ-5,5ʹ-dicarboxylic acid)(CO)₃Cl or Mn(2,2ʹ-bipyʹ-5,5ʹ- dicarboxylic acid)(CO)₃Br with either LiCl or LiBr, respectively, produces si... Read More about Photochemistry of framework-supported M(diimine)(CO)₃X complexes in 3D Lithium-Carboxylate metal−organic frameworks: monitoring the effect of framework cations.

A laboratory-scale annular continuous flow reactor for UV photochemistry using excimer lamps for discrete wavelength excitation and its use in a wavelength study of a photodecarboxlyative cyclisation (2016)
Journal Article
DeLaney, E. N., Lee, D. S., Elliott, L. D., Jin, J., Booker-Milburn, K., Poliakoff, M., & George, M. W. (2017). A laboratory-scale annular continuous flow reactor for UV photochemistry using excimer lamps for discrete wavelength excitation and its use in a wavelength study of a photodecarboxlyative cyclisation. Green Chemistry, 19(6), 1431-1438. https://doi.org/10.1039/C6GC02888H

This paper describes a new annular reactor for continuous UV photochemistry, which uses easily interchangeable excimer lamps of different wavelengths. The reactor has narrow clearance to form thin films of material for efficient irradiation of molecu... Read More about A laboratory-scale annular continuous flow reactor for UV photochemistry using excimer lamps for discrete wavelength excitation and its use in a wavelength study of a photodecarboxlyative cyclisation.

The phase equilibrium and density studies of the ternary mixtures of CO2 + Ar + N2 and CO2 + Ar + H2, systems relevance to CCS technology (2016)
Journal Article
Ke, J., Suleiman, N., Sanchez-Vicente, Y., Murphy, T. S., Rodriguez, J., Ramos, A., Poliakoff, M., & George, M. W. (2017). The phase equilibrium and density studies of the ternary mixtures of CO2 + Ar + N2 and CO2 + Ar + H2, systems relevance to CCS technology. International Journal of Greenhouse Gas Control, 56, 55-66. https://doi.org/10.1016/j.ijggc.2016.11.003

The p-T phase diagrams of two ternary systems (CO2 + Ar + N2 and CO2 + Ar + H2) have been measured at temperatures between 268 and 303 K using a fibre-optic phase equilibrium analyser. CO2, which is the major component, has a mole fraction ranging fr... Read More about The phase equilibrium and density studies of the ternary mixtures of CO2 + Ar + N2 and CO2 + Ar + H2, systems relevance to CCS technology.

Probing the use of long lived intra-ligand π-π * excited states for photocatalytic systems: a study of the photophysics and photochemistry of [ReCl(CO)3(dppz-(CH3)2)] (2016)
Journal Article
Summers, P. A., Calladine, J. A., Ibrahim, N., Kusumo, K. P., Clark, C. A., Sun, X.-Z., Hamilton, M. L., Towrie, M., McMaster, J., Schröder, M., & George, M. W. (2017). Probing the use of long lived intra-ligand π-π * excited states for photocatalytic systems: a study of the photophysics and photochemistry of [ReCl(CO)3(dppz-(CH3)2)]. Polyhedron, 123, 259-264. https://doi.org/10.1016/j.poly.2016.11.005

We report the excited state photophysics and photochemistry of [ReCl(CO)3(dppz-(CH3)2)] (dppz-(CH3)2 = 11,12-dimethyl-dipyrido[3,2-a:2’,3’-c]phenazine) in CH3CN using timeresolved infrared (TRIR) and Fourier transform infrared (FTIR) spectroscopy. Ex... Read More about Probing the use of long lived intra-ligand π-π * excited states for photocatalytic systems: a study of the photophysics and photochemistry of [ReCl(CO)3(dppz-(CH3)2)].

Probing the excited state nature of coordination complexes with blended organic and inorganic chromophores using vibrational spectroscopy (2016)
Journal Article
Horvath, R., Huff, G. S., Gordon, K. C., & George, M. W. (2016). Probing the excited state nature of coordination complexes with blended organic and inorganic chromophores using vibrational spectroscopy. Coordination Chemistry Reviews, 325, 41-58. https://doi.org/10.1016/j.ccr.2016.04.007

The use of transient vibrational spectroscopy in the analysis of rhenium(I) and ruthenium(II) complexes is discussed. Particular focus is given to the use resonance Raman spectroscopy to probe initial photoexcitation and transient resonance Raman and... Read More about Probing the excited state nature of coordination complexes with blended organic and inorganic chromophores using vibrational spectroscopy.

Can aliphatic anchoring groups be utilised with dyes for p-type dye sensitized solar cells? (2016)
Journal Article
Hao, Y., Wood, C. J., Clark, C. A., Calladine, J. A., Horvath, R., Hanson-Heine, M. W. D., Sun, X.-Z., Clark, I. P., Towrie, M., George, M. W., Yang, X., Sun, L., & Gibson, E. A. (2016). Can aliphatic anchoring groups be utilised with dyes for p-type dye sensitized solar cells?. Dalton Transactions, 45(18), 7708-7719. https://doi.org/10.1039/c6dt00146g

A series of novel laterally anchoring tetrahydroquinoline derivatives have been synthesized and investigated for their use in NiO-based p-type dye-sensitized solar cells. The kinetics of charge injection and recombination at the NiO-dye interface for... Read More about Can aliphatic anchoring groups be utilised with dyes for p-type dye sensitized solar cells?.

A Versatile Precursor System for Supercritical Fluid Electrodeposition of Main-Group Materials (2015)
Journal Article
Suleiman, N., Bartlett, P. N., Burt, J., Cook, D. A., Cummings, C. Y., George, M. W., Hector, A. L., Hasan, M. M., Ke, J., Levason, W., Pugh, D., Reid, G., Richardson, P. W., Smith, D. C., Spencer, J., & Zhang, W. (2016). A Versatile Precursor System for Supercritical Fluid Electrodeposition of Main-Group Materials. Chemistry - A European Journal, 22(1), 302-309. https://doi.org/10.1002/chem.201503301

For the first time, a versatile electrolyte bath is described that can be used to electrodeposit a wide range of p-block elements from supercritical difluoromethane (scCH2F2). The bath comprises the tetrabutylammonium chlorometallate complex of the e... Read More about A Versatile Precursor System for Supercritical Fluid Electrodeposition of Main-Group Materials.

A synthetic-dynamic method for water solubility measurements in high pressure CO2 using ATR–FTIR spectroscopy (2015)
Journal Article
Comak, G., Foltran, S., Ke, J., Pérez, E., Sánchez-Vicente, Y., George, M. W., & Poliakoff, M. (2016). A synthetic-dynamic method for water solubility measurements in high pressure CO2 using ATR–FTIR spectroscopy. Journal of Chemical Thermodynamics, 93, https://doi.org/10.1016/j.jct.2015.09.024

A new synthetic method for studying phase behaviour is described using Attenuated Total Reflection (ATR) spectroscopy. The method has been developed to provide relevant information on the solubility of water in CO2. The dew point of water has been de... Read More about A synthetic-dynamic method for water solubility measurements in high pressure CO2 using ATR–FTIR spectroscopy.

Comparison of rhenium–porphyrin dyads for CO₂ photoreduction: photocatalytic studies and charge separation dynamics studied by time-resolved IR spectroscopy (2015)
Journal Article
Windle, C. D., George, M. W., Perutz, R. N., Summers, P. A., Sun, X. Z., & Whitwood, A. C. (2015). Comparison of rhenium–porphyrin dyads for CO₂ photoreduction: photocatalytic studies and charge separation dynamics studied by time-resolved IR spectroscopy. Chemical Science, 6(12), 6847-6864. https://doi.org/10.1039/c5sc02099a

We report a study of the photocatalytic reduction of CO₂ to CO by zinc porphyrins covalently linked to [ReI(2,2′-bipyridine)(CO)₃L]⁺/⁰ moieties with visible light of wavelength >520 nm. Dyad 1 contains an amide C₆H₄NHC(O) link from porphyrin to bipyr... Read More about Comparison of rhenium–porphyrin dyads for CO₂ photoreduction: photocatalytic studies and charge separation dynamics studied by time-resolved IR spectroscopy.

Applying green chemistry to the photochemical route to artemisinin (2015)
Journal Article
Amara, Z., Bellamy, J. F. B., Horvath, R., Miller, S. J., Beeby, A., Burgard, A., Rossen, K., Poliakoff, M., & George, M. W. (2015). Applying green chemistry to the photochemical route to artemisinin. Nature Chemistry, 7(6), 489-495. https://doi.org/10.1038/nchem.2261

Artemisinin is an important antimalarial drug but, currently, the environmental and economic costs of its semi-synthetic production are relatively high. Most of these costs originate in the final chemical steps which follow a complex acid- and photo-... Read More about Applying green chemistry to the photochemical route to artemisinin.

Calculating singlet excited states: comparison with fast time-resolved infrared spectroscopy of coumarins (2015)
Journal Article
Hanson-Heine, M. W., Wrigglesworth, A., Uroos, M., Calladine, J. A., Murphy, T. S., Hamilton, M., Clark, I. P., Towrie, M., Dowden, J., Besley, N. A., & George, M. W. (2015). Calculating singlet excited states: comparison with fast time-resolved infrared spectroscopy of coumarins. Journal of Chemical Physics, 142(15), 1-7. https://doi.org/10.1063/1.4917311

In contrast to the ground state, the calculation of the infrared (IR) spectroscopy of molecular singlet excited states represents a substantial challenge. Here we use the structural IR fingerprint of the singlet excited states of a range of coumarin... Read More about Calculating singlet excited states: comparison with fast time-resolved infrared spectroscopy of coumarins.

Photocatalytic hydroxylation of arylboronic acids using continuous flow reactors (2014)
Journal Article
Penders, I. G. T. M., Amara, Z., Horvath, R., Rossen, K., Poliakoff, M., & George, M. W. (in press). Photocatalytic hydroxylation of arylboronic acids using continuous flow reactors. RSC Advances, 5(9), https://doi.org/10.1039/c4ra15588b

The photocatalytic oxidation of mono- and di-substituted arylboronic acids to phenols has been investigated using a continuous flow photoreactor fitted with white LEDs. An EtOH–H2O solvent system accelerated conversion at 2 MPa; whereas reactions at... Read More about Photocatalytic hydroxylation of arylboronic acids using continuous flow reactors.

Photochemical Dihydrogen Production Using an Analogue of the Active Site of [NiFe] Hydrogenase (2014)
Journal Article
Summers, P. A., Dawson, J., Ghiotto, F., Hanson-Heine, M. W., Vuong, K. . Q., Davies, E. S., Sun, X.-Z., Besley, N. A., McMaster, J., George, M. . W., & Schröder, M. (2014). Photochemical Dihydrogen Production Using an Analogue of the Active Site of [NiFe] Hydrogenase. Inorganic Chemistry, 53(9), 4430-4439. https://doi.org/10.1021/ic500089b

The photoproduction of dihydrogen (H2) by a low molecular weight analogue of the active site of [NiFe] hydrogenase has been investigated by the reduction of the [NiFe2] cluster, 1, by a photosensitier PS (PS = [ReCl(CO)3(bpy)] or [Ru(bpy)3][PF6]2). R... Read More about Photochemical Dihydrogen Production Using an Analogue of the Active Site of [NiFe] Hydrogenase.

Calculating excited state properties using Kohn-Sham density functional theory (2013)
Journal Article
Hanson-Heine, M. W., George, M. W., & Besley, N. A. (2013). Calculating excited state properties using Kohn-Sham density functional theory. Journal of Chemical Physics, 138(6), Article 064101. https://doi.org/10.1063/1.4789813

The accuracy of excited states calculated with Kohn-Sham density functional theory using the maximum overlap method has been assessed for the calculation of adiabatic excitation energies, excited state structures, and excited state harmonic and anhar... Read More about Calculating excited state properties using Kohn-Sham density functional theory.

A Porous Framework Polymer Based on a Zinc(II) 4,4‘-Bipyridine-2,6,2‘,6‘-tetracarboxylate:  Synthesis, Structure, and “Zeolite-Like” Behaviors (2006)
Journal Article
Lin, X., Blake, A. J., Wilson, C., Sun, X. Z., Champness, N. R., George, M. W., Hubberstey, P., Mokaya, R., & Schröder, M. (2006). A Porous Framework Polymer Based on a Zinc(II) 4,4‘-Bipyridine-2,6,2‘,6‘-tetracarboxylate:  Synthesis, Structure, and “Zeolite-Like” Behaviors. Journal of the American Chemical Society, 128(33), 10745-10753. https://doi.org/10.1021/ja060946u

The robust metal-organic framework compound {[Zn2(L)] ·4H2O}∞ I has been synthesized by hydrothermal reaction of ZnCl2 and 4,4′-bipyridine-2,6, 2′,6′-tetracarboxylic acid (H4L). Compound I crystallizes in a chiral space group, P42212, with the chiral... Read More about A Porous Framework Polymer Based on a Zinc(II) 4,4‘-Bipyridine-2,6,2‘,6‘-tetracarboxylate:  Synthesis, Structure, and “Zeolite-Like” Behaviors.