James Bull

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• 2025

  Dissociation and radiative stabilization of the indene cation: The nature of the C–H bond and astrochemical implications

  Stockett, M. H., Subramani, A., Liu, C., Marlton, S. J. P., Ashworth, E. K., Cederquist, H., Zettergren, H. & Bull, J. N., 13 May 2025, In: The Journal of Chemical Physics. 162, 18, 184306.

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• Infrared cooling in an anharmonic cascade framework: 2-cyanoindene, the smallest cyano-PAH identified in Taurus Molecular Cloud-1

  Stockett, M. H., Esposito, V. J., Ashworth, E. K., Jacovella, U. & Bull, J. N., 20 Feb 2025, In: ACS Earth and Space Chemistry. 9, 2, p. 382-393 12 p.

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• Radiative cooling of the deprotonated cyan fluorescent protein chromophore anion

  Flotte de Pouzols, J., Subramani, A., Ashworth, E. K., Bull, J. N., Cederquist, H., Dezalay, J., List, N. H., Martini, P., Navarrete, J. E. N., Schmidt, H. T., Zettergren, H., Zhu, B. & Stockett, M. H., 18 Apr 2025, In: Physical Review A. 111, 4, 043112.

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• Radiative stabilization of the indenyl cation: Recurrent fluorescence in a closed-shell polycyclic aromatic hydrocarbon

  Bull, J. N., Subramani, A., Liu, C., Marlton, S. J. P., Ashworth, E. K., Cederquist, H., Zettergren, H. & Stockett, M. H., 6 Jun 2025, In: Physical Review Letters. 134, 22, 228002.

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• Ultrafast photophysics of the cyan fluorescent protein chromophore in solution

  Fatima, A., Ashworth, E. K., Fernandes, I., Cammidge, A. N., Bressan, G., Meech, S. R. & Bull, J. N., 14 May 2025, In: Physical Chemistry Chemical Physics. 27, 18, p. 9407-9416 10 p.

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• Vibrational and electronic spectroscopy of 2-cyanoindene cations

  Douglas-Walker, T. E., Ashworth, E. K., Stockett, M. H., Daly, F. C., Chambrier, I., Esposito, V. J., Gerlach, M., Zheng, A., Palotás, J., Cammidge, A. N., Campbell, E. K., Brünken, S. & Bull, J. N., 16 Jan 2025, In: ACS Earth and Space Chemistry. 9, 1, p. 134–145 12 p.

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• 2024

  Photoelectron spectroscopy of deprotonated benzonitrile

  Ashworth, E. K. & Bull, J. N., 14 Sept 2024, In: The Journal of Chemical Physics. 161, 11, 114302.

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• Spectroscopy and dynamics of isolated anions: Versatile instrumentation for photodetachment and photoelectron spectroscopy

  Ashworth, E. K., Ashworth, S. H. & Bull, J. N., Jul 2024, In: Review of Scientific Instruments. 95, 7, 075103.

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• Substituent effects on the photophysics of the kaede chromophore

  Fatima, A., Ashworth, E. K., Bressan, G., B. Page, P. C., Bull, J. N. & Meech, S. R., 14 Dec 2024, In: Physical Chemistry Chemical Physics. 26, 46, p. 29048-29059 12 p.

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• 2023

  Alkylated green fluorescent protein chromophores: Dynamics in the gas phase and in aqueous solution

  Ashworth, E. K., Kao, M-H., Anstöter, C. S., Riesco-llach, G., Blancafort, L., Solntsev, K. M., Meech, S. R., Verlet, J. R. R. & Bull, J. N., 21 Sept 2023, In: Physical Chemistry Chemical Physics. 25, 35, p. 23626-23636 11 p.

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  1 Citation (Scopus)

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• Autoionization from the plasmon resonance in isolated 1-cyanonaphthalene

  Bull, J. N., Bolognesi, P., Anstöter, C. S., Ashworth, E. K., Navarro Navarrete, J. E., Zhu, B., Richter, R., Pal, N., Chiarinelli, J., Avaldi, L., Zettergren, H. & Stockett, M. H., 28 Jun 2023, In: The Journal of Chemical Physics. 158, 24, 241101.

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  4 Citations (Scopus)

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• Cooling dynamics of energized naphthalene and azulene radical cations

  Lee, J. W. L., Stockett, M. H., Ashworth, E. K., Navarro Navarrete, J. E., Gougoula, E., Garg, D., Ji, M., Zhu, B., Indrajith, S., Zettergren, H., Schmidt, H. T. & Bull, J. N., 7 May 2023, In: The Journal of Chemical Physics. 158, 17, 174305.

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• Efficient stabilization of cyanonaphthalene by fast radiative cooling and implications for the resilience of small PAHs in interstellar clouds

  Stockett, M. H., Bull, J. N., Cederquist, H., Indrajith, S., Ji, M., Navarro Navarrete, J. E., Schmidt, H. T., Zettergren, H. & Zhu, B., 24 Jan 2023, In: Nature Communications. 14, 395.

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• Experimental radiative cooling rates of a polycyclic aromatic hydrocarbon cation

  Navarro Navarrete, J. E., Bull, J. N., Cederquist, H., Indrajith, S., Ji, M., Schmidt, H. T., Zettergren, H., Zhu, B. & Stockett, M. H., 1 Sept 2023, In: Faraday Discussions. 245, p. 352-367 16 p.

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  7 Citations (Scopus)

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• Photophysics of the red-form Kaede chromophore

  Addison, K., Roy, P., Bressan, G., Skudaite, K., Robb, J., Bulman Page, P. C., Ashworth, E. K., Bull, J. N. & Meech, S. R., 14 Apr 2023, In: Chemical Science. 14, 14, p. 3763-3775 13 p.

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  4 Citations (Scopus)

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• Probing colossal carbon rings

  Marlton, S. J. P., Buntine, J. T., Watkins, P., Liu, C., Jacovella, U., Carrascosa, E., Bull, J. N. & Bieske, E. J., 9 Feb 2023, In: The Journal of Physical Chemistry A. 127, 5, p. 1168-1178 11 p.

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  8 Citations (Scopus)

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• Protomers of the green and cyan fluorescent protein chromophores investigated using action spectroscopy

  Ashworth, E. K., Dezalay, J., Ryan, C., Ieritano, C., Hopkins, W. S., Chambrier, I., Cammidge, A. N., Stockett, M. H., Noble, J. A. & Bull, J. N., 14 Aug 2023, In: Physical Chemistry Chemical Physics. 25, 30, p. 20405-20413 9 p.

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• 2022

  An ion mobility mass spectrometer coupled with a cryogenic ion trap for recording electronic spectra of charged, isomer-selected clusters

  Buntine, J. T., Carrascosa, E., Bull, J. N., Jacovella, U., Cotter, M. I., Watkins, P., Liu, C., Scholz, M. S., Adamson, B. D., Marlton, S. J. P. & Bieske, E. J., 4 Apr 2022, In: Review of Scientific Instruments. 93, 4, 043201.

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  15 Citations (Scopus)

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• Complexation of green and red Kaede fluorescent protein chromophores by a zwitterion to probe electrostatic and induction field effects

  Ashworth, E. K., Stockett, M. H., Kjaer, C., Bulman Page, P. C., Meech, S. R., Nielsen, S. B. & Bull, J. N., 24 Feb 2022, In: The Journal of Physical Chemistry A. 126, 7, p. 1158–1167 10 p.

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  6 Citations (Scopus)

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• Cryogenic fluorescence spectroscopy of ionic fluorones in gaseous and condensed phases: New light on their intrinsic photophysics

  Ashworth, E. K., Langeland, J., Stockett, M. H., Lindkvist, T. T., Kjær, C., Bull, J. N. & Nielsen, S. B., 29 Dec 2022, In: The Journal of Physical Chemistry A. 126, 51, p. 9553–9563 11 p.

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• Disentangling electronic spectra of linear and cyclic hydrogenated carbon cluster cations, C_2n+1H⁺ (n = 3–10)

  Marlton, S. J. P., Buntine, J. T., Liu, C., Watkins, P., Jacovella, U., Carrascosa, E., Bull, J. N. & Bieske, E. J., 29 Sept 2022, In: The Journal of Physical Chemistry A. 126, 38, p. 6678–6685 8 p.

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  5 Citations (Scopus)

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• Excited-state barrier controls E → Z photoisomerization in p-hydroxycinnamate biochromophores

  Ashworth, E. K., Coughlan, N. J. A., Hopkins, W. S., Bieske, E. J. & Bull, J. N., 6 Oct 2022, In: The Journal of Physical Chemistry Letters. 13, 39, p. 9028-9034 7 p.

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  1 Citation (Scopus)

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• Photo-induced 6π-electrocyclisation and cycloreversion of isolated dithienylethene anions

  Buntine, J., Carrascosa, E., Bull, J. N., Muller, G., Jacovella, U., Glasson, C. R., Vamvounis, G. & Bieske, E. J., 21 Jul 2022, In: Physical Chemistry Chemical Physics. 24, 27, p. 16628-16636 9 p.

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• Radiative cooling of polyyne anions: C₄H^- and C₆H^-

  Zhu, B., Bull, J. N., Navarro Navarrete, J. E., Schmidt-May, A. F., Cederquist, H., Schmidt, H. T., Zettergren, H. & Stockett, M. H., 1 Nov 2022, In: The Journal of Chemical Physics. 157, 17, 174308.

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  2 Citations (Scopus)

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• Radiative cooling rates of substituted PAH ions

  Zhu, B., Bull, J. N., Ji, M., Zettergren, H. & Stockett, M. H., 1 Aug 2022, In: The Journal of Chemical Physics. 157, 4, 044303.

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• Statistical vibrational autodetachment and radiative cooling rates of para-benzoquinone

  Stockett, M. H., Bull, J. N., Schmidt, H. T. & Zettergren, H., 21 May 2022, In: Physical Chemistry Chemical Physics. 24, 19, p. 12002-12010 9 p.

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• 2021

  Action spectroscopy of deprotomer-selected hydroxycinnamate anions

  Bull, J. N., Buntine, J. T., Carrascosa, E., Stockett, M. H. & Bieske, E. J., 24 Feb 2021, In: European Physical Journal D. 75, 2, 67.

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  5 Citations (Scopus)

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• Action spectroscopy of isomer-selected luciferin anions

  Kjær, C., Bull, J. N., Carrascosa, E., Nielsen, S. B. & Bieske, E. J., 2 Mar 2021, In: European Physical Journal D. 75, 3, 72.

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  4 Citations (SciVal)

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• Action spectroscopy of the isolated red Kaede fluorescent protein chromophore

  Coughlan, N. J. A., Stockett, M. H., Kjaer, C., Ashworth, E. K., Bulman Page, P. C., Meech, S. R., Nielsen, S. B., Blancafort, L., Hopkins, W. S. & Bull, J. N., 28 Sept 2021, In: The Journal of Chemical Physics. 155, 12, 124304.

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  10 Citations (Scopus)

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• Autodetachment dynamics of 2-naphthoxide and implications for astrophysical anion abundance

  Ashworth, E. K., Anstöter, C. S., Verlet, J. R. R. & Bull, J. N., 14 Mar 2021, In: Physical Chemistry Chemical Physics. 23, 10, p. 5817-5823 7 p.

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• Competitive dehydrogenation and backbone fragmentation of superhydrogenated PAHs: A laboratory study

  Stockett, M. H., Avaldi, L., Bolognesi, P., Bull, J. N., Carlini, L., Carrascosa, E., Chiarinelli, J., Richter, R. & Zettergren, H., 24 May 2021, In: Astrophysical Journal. 913, 1, 46.

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• Electronic spectra of positively charged carbon clusters - C_2n⁺ (n=6-14)

  Buntine, J. T., Cotter, M. I., Jacovella, U., Liu, C., Watkins, P., Carrascosa, E., Bull, J. N., Weston, L., Muller, G., Scholz, M. S. & Bieske, E. J., 7 Dec 2021, In: The Journal of Chemical Physics. 155, 21, 214302.

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• Nonadiabatic dynamics between valence, nonvalence, and continuum electronic states in a heteropolycyclic aromatic hydrocarbon

  Bull, J. N., Anstöter, C. S., Stockett, M. H., Clarke, C. J., Gibbard, J. A., Bieske, E. J. & Verlet, J. R. R., 16 Dec 2021, In: The Journal of Physical Chemistry Letters. 12, 49, p. 11811–11816 6 p.

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• Non-statistical fragmentation in photo-activated flavin mononucleotide anions

  Giacomozzi, L., Kjær, C., Brøndsted Nielsen, S., Ashworth, E. K., Bull, J. N. & Stockett, M. H., 26 Jul 2021, In: The Journal of Chemical Physics. 155, 4, 044305.

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  2 Citations (Scopus)

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• Photoisomerization of linear and stacked isomers of a charged styryl dye – a tandem ion mobility study

  Carrascosa, E., Bull, J. N., Martínez-Núñez, E., Scholz, M. S., Buntine, J. T. & Bieske, E. J., 1 Dec 2021, In: Journal of the American Society for Mass Spectrometry. 32, 12, p. 2842-2851 10 p.

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• Roadmap on dynamics of molecules and clusters in the gas phase

  Zettergren, H., Domaracka, A., Schlathölter, T., Bolognesi, P., Díaz-Tendero, S., Łabuda, M., Tosic, S., Maclot, S., Johnsson, P., Steber, A., Tikhonov, D., Castrovilli, M. C., Avaldi, L., Bari, S., Milosavljević, A. R., Palacios, A., Faraji, S., Piekarski, D. G., Rousseau, P., Ascenzi, D., & 24 othersRomanzin, C., Erdmann, E., Alcamí, M., Kopyra, J., Limão-Vieira, P., Kočišek, J., Fedor, J., Albertini, S., Gatchell, M., Cederquist, H., Schmidt, H. T., Gruber, E., Andersen, L. H., Heber, O., Toker, Y., Hansen, K., Noble, J. A., Jouvet, C., Kjær, C., Nielsen, S. B., Carrascosa, E., Bull, J., Candian, A. & Petrignani, A., 11 May 2021, In: European Physical Journal D. 75, 5, 152.

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• 2020

  Fingerprinting the excited state dynamics in methyl ester and methyl ether anions of deprotonated para-coumaric acid

  Bull, J. N., Anstöter, C. S. & Verlet, J. R. R., 19 Mar 2020, In: The Journal of Physical Chemistry A. 124, 11, p. 2140-2151 12 p.

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  11 Citations (Scopus)

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• Near-infrared reversible photoswitching of an isolated azobenzene-stilbene dye

  Carrascosa, E., Bull, J. N., Buntine, J. T., da Silva, G., Santos, P. F. & Bieske, E. J., 16 Feb 2020, In: Chemical Physics Letters. 741, 5 p., 137065.

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  4 Citations (Scopus)

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• Photophysics of isolated Rose Bengal anions

  Stockett, M. H., Kjaer, C., Daly, S., Bieske, E. J., Verlet, J. R. R., Nielsen, S. B. & Bull, J., 15 Oct 2020, In: The Journal of Physical Chemistry A. 124, 41, p. 8429–8438 10 p.

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• Radiative cooling of carbon cluster anions C2n+1− (n = 3–5)

  Stockett, M., Bull, J., Buntine, J. T., Carrascosa, E., Anderson, E. K., Gatchell, M., Kaminska, M., Nascimento, R. F., Cederquist, H., Schmidt, H. T. & Zettergren, H., 7 Jul 2020, In: European Physical Journal D. 74, 7, 150.

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• Reversible photoswitching of isolated ionic hemiindigos with visible light

  Carrascosa, E., Petermayer, C., Scholz, M. S., Bull, J. N., Dube, H. & Bieske, E. J., 2 Apr 2020, In: ChemPhysChem. 21, 7, p. 680-685 6 p.

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• Role of nonvalence states in the ultrafast dynamics of isolated anions

  Verlet, J. R. R., Anstöter, C. S., Bull, J. N. & Rogers, J. P., 7 May 2020, In: The Journal of Physical Chemistry A. 124, 18, p. 3507-3519 13 p.

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• Spectroscopic characterisation of radical polyinterhalogen molecules

  Gregory, J., Verlet, J. R. R. & Bull, J. N., 28 Apr 2020, In: Physical Chemistry Chemical Physics. 22, 16, p. 8284-8288 5 p.

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• Unimolecular fragmentation and radiative cooling of isolated PAH ions: A quantitative study

  Stockett, M. H., Bull, J. N., Buntine, J. T., Carrascosa, E., Ji, M., Kono, N., Schmidt, H. T. & Zettergren, H., 19 Oct 2020, In: The Journal of Chemical Physics. 153, 15, 154303.

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• 2019

  Exotic systems: General discussion

  Dessent, C., Johnson, M., Gerber, B., Wester, R., Asmis, K., Avdonin, I., Bieske, E., Gatchell, M., Bull, J., Sarre, P., Gaigeot, M-P., Chou, C-W., Mabbs, R., Jordan, K., Beyer, M. K., McCaslin, L., Krylov, A., Schlemmer, S., McCoy, A. B., Verlet, J., & 4 othersMeir, Z., Simons, J., Gabelica, V. & Willitsch, S., 2019, In: Faraday Discussions. 217, p. 601-622 22 p.

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• Photodetachment and photoreactions of substituted naphthalene anions in a tandem ion mobility spectrometer

  Bull, J. N., Buntine, J. T., Scholz, M. S., Carrascosa, E., Giacomozzi, L., Stockett, M. H. & Bieske, E. J., 1 Jul 2019, In: Faraday Discussions. 217, p. 34-46 13 p.

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• Photoelectron spectroscopy of the hexafluorobenzene cluster anions: (C₆F₆ )_n^- (n = 1-5) and I^- (C₆F₆)

  Rogers, J. P., Anstöter, C. S., Bull, J. N., Curchod, B. F. E. & Verlet, J. R. R., 28 Feb 2019, In: Journal of Physical Chemistry A. 123, 8, p. 1602-1612 11 p.

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  32 Citations (SciVal)

• Photoinitiated intramolecular proton transfer in deprotonated para-coumaric acid

  Bull, J., da Silva, G., Scholz, M. S., Carrascosa, E. & Bieske, E. J., 23 May 2019, In: Journal of Physical Chemistry A. 123, 20, p. 4419-4430

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• Ultrafast photoisomerisation of an isolated retinoid

  Bull, J., West, C., Anstoter, C., da Silva, G., Bieske, E. J. & Verlet, J. R. R., 28 May 2019, In: Physical Chemistry Chemical Physics. 21, 20, p. 10567-10579 13 p.

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• Ultrafast valence to non-valence excited state dynamics in a common anionic chromophore

  Bull, J. N., Anstöter, C. S. & Verlet, J. R. R., 20 Dec 2019, In: Nature Communications. 10, 1, 5820.

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