Now showing items 1-20 of 151

  • Emergent Properties of an Organic Semiconductor Driven by its Molecular Chirality 

    Yang, Ying; Rice, Beth; Shi, Xingyuan; Brandt, Jochen; Correa da Costa, Rosenildo; Hedley, Gordon; Smilgies, Detlef; Frost, Jarvist; Samuel, Ifor; Otero de la Roza, Alberto; Jelfs, Kim; Nelson, Jenny; Campbell, Alasdair; Fuchter, Matthew; and Johnson, Erin. (2017). Emergent Properties of an Organic Semiconductor Driven by its Molecular Chirality. ACS Nano 11, 8329-8338. DOI: 10.1021/acsnano.7b03540
  • Exchange-hole dipole dispersion model for accurate energy ranking in molecular crystal structure prediction II: Non-planar molecules 

    Whittleton, Sarah; Otero de la Roza, Alberto; Johnson, Erin. (2017), Exchange-hole dipole dispersion model for accurate energy ranking in molecular crystal structure prediction II: Non-planar moleculesJournal of Chemical Theory and Computation, 13, 5332-5342. https://doi.org/10.1021/acs.jctc.7b00715
  • The exchange-hole dipole dispersion model for accurate energy ranking in molecular crystal structure prediction 

    Whittleton, Sarah; Otero de la Roza, Alberto; J. Johnson, Erin. (2017). The exchange-hole dipole dispersion model for accurate energy ranking in molecular crystal structure prediction. Journal of Chemical Theory and Computation, 13, 441-450. https://doi.org/10.1021/acs.jctc.6b00679
  • Exchange-correlation effects for non-covalent interactions in density-functional theory 

    Otero de la Roza, Alberto; DiLabio, Gino; Johnson, Erin..(2016). Exchange-correlation effects for non-covalent interactions in densityfunctional theory. Journal of Chemical Theory and Computation, 2016, 12, 7, 3160– 3175. https://doi.org/10.1021/acs.jctc.6b00298
  • Becke's virial exciton model gives accurate charge-transfer excitation energies 

    Feng, Xibo, Becke, Axel, Johnson, Erin. (2018). Becke's virial exciton model gives accurate charge-transfer excitation energies. J. Chem. Phys. 149, 231101 (2018). doi.org/10.1063/1.5078515
  • Surface Adsorption from the Exchange-Hole Dipole Moment Dispersion Model 

    Christian, Matthew, Otero de la Roza, Alberto, and Johnson, Erin. Surface Adsorption from the Exchange-Hole Dipole Moment Dispersion Model. Journal of Chemical Theory and Computation, 12, (7) 3305-3315. DOI: 10.1021/acs.jctc.6b00222
  • Reevaluating the Stability and Prevalence of Conglomerates: Implications for Preferential Crystallization 

    Otero de la Roza, Alberto, Hein, Jason, and Johnson, Erin. (2016). Reevaluating the Stability and Prevalence of Conglomerates: Implications for Preferential Crystallization. Crystal Growth & Design, 16, 6055-6059. DOI: 10.1021/acs.cgd.6b01088
  • Evaluation of Shear-Slip Transitions in Crystalline Aspirin by Density-Functional Theory 

    LeBlanc, Luc, Otero de la Roza, Alberto, and Otero de la Roza, Alberto. (2016). Evaluation of Shear-Slip Transitions in Crystalline Aspirin by Density-Functional Theory. Crystal Growth & Design, 16, 6867-6873. https://doi.org/10.1021/acs.cgd.6b01038
  • Facile Deprotection of F-BODIPYs using Methylboronic Acid 

    4,4-Difluoro-4-bora-3a,4a-diaza-s-indacenes (F-BODIPYs) are deprotected through removal of the –BF2 moiety upon treatment with methylboronic acid. The tolerance of various substitution patterns about the dipyrrinato core ...
  • Synthesis and reactivity of 2-thionoester pyrroles: a route to 2-formyl pyrroles 

    Kim, Min Joon; Gaube, Sophie M.; Beh, Michael H. R.; Smith, Craig D.; Thompson, Alison. (2019). RSC Advances.
    2-Functionalised pyrroles exhibit considerable synthetic utility. Herein, the synthesis and reactivity of 2-thionoester (-C(S)OR) pyrroles is reported. 2-Thionoester pyrroles were synthesized using a Knorr-type approach ...
  • The Photodecarboxylation of Substituted Naphthylmethyl Arylacetate Esters: Synthesis of Naphthylarylethanes 

    Hilborn, James W., Moya-Barrios, Reinaldo, Thompson, Alison. (2019). The Photodecarboxylation of Substituted Naphthylmethyl Arylacetate Esters: Synthesis of Naphthylarylethanes. ACS Publication (pre-publication).
    The synthesis of naphthylarylethanes via the photodecarboxylation of naphthylmethyl arylacetate esters is reported where the aryl group is able to stabilize a charge transfer reaction. The reaction proceeds via intramolecular ...
  • Classifying donor strengths of dipyrrinato/aza-dipyrrinato ligands 

    Diaz-Rodriguez, Roberto M., Robertson, Katherine N., and Thompson, Alison. (2019). Classifying donor strengths of dipyrrinato/aza-dipyrrinato ligands. Dalton Transactions.
    A parameter is reported by which to use 13C NMR chemical shifts to measure and predict the donor capabilities of N^N dipyrrinato and aza-dipyrrinato ligands chelating in L^X fashion. The results enable the rationalisation ...
  • Step-wise synthetic approach is necessary to access g-conjugates of folate: folate-conjugated prodigiosenes 

    Despite the vast literature that describes reacting folic acid with a pharmacophore, this route is ineffective in providing the correct regioisomer of the resulting conjugate. We herein present a step-wise route to the ...
  • Synthesis of Prodigiosene-Estrogen Conjugates: optimization of protecting group strategies and anticancer properties 

    Marchal, E., Uddin, M. I., Hawco, C. L., & Thompson, A. (2015). Synthesis of prodigiosene–estrogen conjugates: optimization of protecting group strategies and anticancer properties. Canadian Journal of Chemistry, 93(5), 526-535. https://doi.org/10.1139/cjc-2014-0516
    The tripyrrolic prodigiosene skeleton was conjugated to several estrogen ligands. The conjugation was achieved via an ester linker that proved to be unusually sensitive to hydrolysis during synthesis. This work describes ...
  • Regioselective Substituent Effects upon the Synthesis of Dipyrrins from 2-Formyl Pyrroles 

    Regioselective Substituent Effects upon the Synthesis of Dipyrrins from 2-Formyl Pyrroles. Beh, M.H.R.; Figliola, C.; Lund, K-l. A.R.; Kajetanowicz, A.K.; Johnsen, A.E.; Aronitz, E.M.; Thompson, A. Can. J. Chem. 2018, 96, 779-784, special issue to honour Dalhousie’s 200th anniversary (NSERC). https://doi.org/10.1139/cjc-2017-0662
    The synthesis of symmetric α-free meso-H-dipyrrin hydrobromides from 5-H-2-formyl pyrroles was investigated. The self-condensation produces regioisomeric dipyrrins through the adoption of two mechanistic pathways. The key ...
  • Synthesis of symmetric meso-H dipyrrin hydrobromides from 2-formyl pyrroles 

    Lund, K. L. A., & Thompson, A. (2014). Synthesis of Symmetric meso-H-Dipyrrin Hydrobromides from 2-Formylpyrroles. Synlett, 25(08), 1142-1144. DOI: 10.1055/s-0033-1341066
    The reaction of 2-formyl pyrroles in acidic methanol gives the corresponding symmetric, meso-H 4,6-dipyrrin hydrobromides. This convenient strategy involves initial deformylation under the acidic conditions, followed by ...
  • The Use of Tin (IV) Chloride to Selectively Cleave Benzyl Esters over Benzyl Ethers and Benzyl Amines 

    Baker, A. E., Marchal, E., Lund, K. L. A., & Thompson, A. (2014). The use of tin (IV) chloride to selectively cleave benzyl esters over benzyl ethers and benzyl amines. Canadian Journal of Chemistry, 92(12), 1175-1185. https://doi.org/10.1139/cjc-2014-0364
    Benzyl esters are cleaved upon reaction with SnCl4, resulting in isolation of the corresponding carboxylic acid. Importantly, benzyl ethers, amines and amides do not undergo debenzylation under these conditions, nor do a ...
  • Antimicrobial Activity of Non-natural Prodigiosenes 

    Marchal, E., Uddin, M. I., Smithen, D. A., Hawco, C. L. A., Lanteigne, M., Overy, D. P., ... & Thompson, A. (2013). Antimicrobial activity of non-natural prodigiosenes. Rsc Advances, 3(45), 22967-22971. DOI: 10.1039/c3ra45479g
    Tripyrrolic prodigiosenes, derivatives of the natural product prodigiosin, have been produced via multi-step synthesis beginning with 2-formyl pyrroles bearing various functionalities at the 4-position. Two tin complexes ...
  • Activation and Deprotection of F-BODIPYs using Boron Trihalides 

    Lundrigan, Travis, Cameron, T. Stanley, Thompson, Alison. (2014). Activation and deprotection of F-BODIPYs using boron trihalides. Chemical Communications, 50(53), 7028-7031. DOI: 10.1039/C4CC02706J
    The activation of F-BODIPYs with boron trihalides, followed by treatment with a nuclephile, effects facile substitution at boron; using water as the nucleophile promotes deprotective removal of the–BF2 moiety and thereby ...
  • Synthesis and Characterization of Pyrrolyldipyrrin F-BODIPYs 

    Greening, S. M., Robertson, K. N., & Thompson, A. (2018). Synthesis and characterization of pyrrolyldipyrrin F-BODIPYs. Photochemical & Photobiological Sciences, 17(1), 89-98. DOIO: 10.1039/C7PP00341B
    A series of synthetic analogs of the tripyrrolic natural product prodigiosin were complexed with boron trifluoride to generate the corresponding F-BODIPYs. The maximum wavelengths of absorption and emission of the ...