International Journal of Quantum Chemistry

Cover image for Vol. 118 Issue 1

Impact Factor: 2.92

ISI Journal Citation Reports © Ranking: 2016: 12/100 (Mathematics Interdisciplinary Applications); 12/36 (Physics Atomic Molecular & Chemical); 59/146 (Chemistry Physical)

Online ISSN: 1097-461X

Associated Title(s): Journal of Computational Chemistry

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Recently Published Articles

  1. On the photochemistry of Fe2(edt)(CO)4(PMe3)2, a [FeFe]-hydrogenase model: A DFT/TDDFT investigation

    Luca Bertini, Marta Erminia Alberto, Federica Arrigoni, Jacopo Vertemara, Piercarlo Fantucci, Maurizio Bruschi, Giuseppe Zampella and Luca De Gioia

    Version of Record online: 21 NOV 2017 | DOI: 10.1002/qua.25537

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    First-principles calculations shine a light on the effect of the phosphine ligands on the early stages of the photodynamic of a [FeFe] hydrogenases model, compared to that of the all CO model Fe2(pdt)(CO)6 (pdt = 1–3 propanedithiolate). The mechanism the CO photolysis and photoisomerization processes are unveiled by detailed characterization of the excited states that contributed to the electronic spectrum in the UV-Vis region.

  2. Adsorption of polycyclic aromatic hydrocarbons and inversion barriers of curved conjugated systems inside the molecular cage ExCage6+

    Pablo A. Denis and Federico Iribarne

    Version of Record online: 16 NOV 2017 | DOI: 10.1002/qua.25539

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    The molecular cage ExCage6+ decreases the inversion barriers of well curved conjugated systems, but the reductions are far from the values determined when stacking interactions are pushed to the limit. Host-guest interaction energies show a linear dependence with respect to the size of the PAH, but the shape of the guest must be considered.

  3. New theoretical insight on the acid sites distribution, their local structures and acid strength of the SAPO-11 molecular sieve

    Anibal Sierraalta, Rafael Añez, David S. Coll and Paola Alejos

    Version of Record online: 16 NOV 2017 | DOI: 10.1002/qua.25541

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    A hybrid QM/MM approach allows for the study of the distribution and acid strength of Brønsted sites in SAPO-11. Benzene and pyridine interact with a single acid site whereas in the case of NH3 two molecules can interact with only one acid site. In general, computational results show that the interaction energies of the molecules with the surface POH groups are stronger than with the surface SiOH groups.

  4. Ab initio quantum chemical calculation of electron density, electrostatic potential, and electric field of biomolecule based on fragment molecular orbital method

    Takeshi Ishikawa

    Version of Record online: 16 NOV 2017 | DOI: 10.1002/qua.25535

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    GRAPHICAL ABSTRACT

    A point charge approximation is combined with the fragment molecular orbital method to reduce the computational effort of quantum chemical calculations of electrostatic properties. This approach allows for the accurate calculations of electrostatic potential values at the molecular surface of the human immunodeficiency virus type 1 protease (3128 atoms) at the MP2 level of theory with cc-pVDZ basis set.

  5. Exploring the mechanisms for the radical induced damage of 6-thioguanine

    Lakshmanan Sandhiya and Kittusamy Senthilkumar

    Version of Record online: 15 NOV 2017 | DOI: 10.1002/qua.25544

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    First-principles calculations reveal that the reactivity of 6-thioguanine (6-TG) is different from that of its canonical counterpart guanine. The additions of free radicals, such as •OH, •OCl, •OOH, and •OONO, the H-atom abstraction, and electron transfer reactions of 6-TG all confirm such finding. The strong stabilization of the thiocarbonyl group in 6-TG may be responsible for the observed change in the order of preferred reactive sites for oxidation of 6-TG and guanine.

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