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All Publications

  • The Intrabinary Shock and Companion Star of Redback Pulsar J2215+5135 ASTROPHYSICAL JOURNAL Sullivan, A. G., Romani, R. W. 2024; 974 (2)

    View details for DOI 10.3847/1538-4357/ad4d85

    View details for Web of Science ID 001335507400001

  • Determining the Hubble constant with AGN-assisted black hole mergers MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Alves, L. B., Sullivan, A. G., Yang, Y., Gayathri, Marka, Z., Marka, S., Bartos, I. 2024; 531 (3): 3679-3683

    View details for DOI 10.1093/mnras/stae1360

    View details for Web of Science ID 001245480800008

  • Small-scale radio jets and tidal disruption events: a theory of high-luminosity compact symmetric objects MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Sullivan, A. G., Blandford, R. D., Begelman, M. C., Birkinshaw, M., Readhead, A. S. 2024; 528 (4): 6302-6311

    View details for DOI 10.1093/mnras/stae322

    View details for Web of Science ID 001169271500006

  • Gamma-ray burst precursors from tidally resonant neutron star oceans: potential implications for GRB 211211A MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Sullivan, A. G., Alves, L. B., Marka, Z., Bartos, I., Marka, S. 2024; 527 (3): 7722-7730

    View details for DOI 10.1093/mnras/stad3572

    View details for Web of Science ID 001131511000109

  • Polarization of Intrabinary Shock Emission in Spider Pulsars ASTROPHYSICAL JOURNAL Sullivan, A. G., Romani, R. W. 2023; 959 (2)

    View details for DOI 10.3847/1538-4357/ad09ae

    View details for Web of Science ID 001116566800001

  • Probing the dark Solar system: detecting binary asteroids with a space-based interferometric asteroid explorer MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Sullivan, A. G., Veske, D., Marka, Z., Bartos, I., Marka, S. 2022; 512 (3): 3738-3753

    View details for DOI 10.1093/mnras/stac669

    View details for Web of Science ID 000778361300008

  • Search for Black Hole Merger Families ASTROPHYSICAL JOURNAL LETTERS Veske, D., Sullivan, A. G., Marka, Z., Bartos, I., Corley, K., Samsing, J., Buscicchio, R., Marka, S. 2021; 907 (2)

    View details for DOI 10.3847/2041-8213/abd721

    View details for Web of Science ID 000614787700001

  • Can we use next-generation gravitational wave detectors for terrestrial precision measurements of Shapiro delay? CLASSICAL AND QUANTUM GRAVITY Sullivan, A. G., Veske, D., Marka, Z., Bartos, I., Ballmer, S., Shawhan, P., Marka, S. 2020; 37 (20)

    View details for DOI 10.1088/1361-6382/abb260

    View details for Web of Science ID 000574337700001

  • Have hierarchical three-body mergers been detected by LIGO/Virgo? MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Veske, D., Marka, Z., Sullivan, A. G., Bartos, I., Corley, K., Samsing, J., Marka, S. 2020; 498 (1): L46-L52

    View details for DOI 10.1093/mnrasl/slaa123

    View details for Web of Science ID 000587744400010

  • Attracting Opposites: Promiscuous Ion-pi Binding in the Nucleobases JOURNAL OF PHYSICAL CHEMISTRY A Ernst, B. G., Lao, K., Sullivan, A. G., DiStasio, R. A. 2020; 124 (20): 4128-4140

    Abstract

    Ion-π interactions between the face of a molecular π-system and a cation or anion are among the strongest noncovalent interactions known, with applications throughout biochemistry and structural biology, molecular recognition and host-guest chemistry, as well as enzyme kinetics and organocatalysis. In this work, we examine the competing notions of selectivity and flexibility in this class of noncovalent interactions by investigating how certain π-systems can be promiscuous ion-π binders with the versatility to form favorable cation- and anion-π complexes. We focus our efforts on a detailed theoretical case study of the DNA/RNA nucleobases by first demonstrating that these π-systems are promiscuous ion-π binders with the biologically relevant Li+/Na+ cations and F-/Cl- anions via benchmark-quality quantum-mechanical binding energy curves computed at the CCSD(T)/CBS level of theory. Using a symmetry-adapted perturbation theory (SAPT)-based energy decomposition analysis, we explore the different physicochemical driving forces underlying the formation of cation- and anion-π complexes, as well as the crucial role played by charge penetration effects in determining the nontrivial (and often counterintuitive) electrostatics in anion-π systems. In doing so, a unified view of these rather distinct noncovalent binding motifs emerges with the finding that both cation- and anion-π complexes are strongly stabilized by an essentially ring-independent potential that can only be overcome by substantially unfavorable electrostatics. This work furnishes a more comprehensive explanation for decades of observed correlations between the equilibrium binding energy and the electrostatic potential above the ring and provides new insight into the nature of selectivity and flexibility in this important class of noncovalent interactions. Quite interestingly, the analysis presented herein demonstrates that π-systems have an inherent propensity to bind both cations and anions, thereby implying that promiscuous ion-π binding is not an exotic property of the nucleobases and should be common in nature.

    View details for DOI 10.1021/acs.jpca.0c02766

    View details for Web of Science ID 000537424600018

    View details for PubMedID 32227907