Carbon-clusters; Radicals; Electronic-spectra; Interstellar molecules; Ions; Interstellar-Molecules
Nagy A., Fulara J., Maier J. P. (2011), Formation of Aromatic Structures from Hydrocarbons in Electrical Discharges: Absorption and Fluorescence Study of C(11)H(9)(+) and C(11)H(9) Isomers in Neon Matrices, in
J. Am. Chem. Soc., 133, 19796-xxx.
Nagy A, Fulara J, Garkusha I, Maier JP (2011), On the Benzylium/Tropylium Ion Dichotomy: Electronic Absorption Spectra in Neon Matrices, in
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 50(13), 3022-3025.
Garkusha I, Fulara J, Sarre PJ, Maier JP (2011), Electronic Absorption Spectra of Protonated Pyrene and Coronene in Neon Matrixes, in
JOURNAL OF PHYSICAL CHEMISTRY A, 115(40), 10972-10978.
Le A, Steimle TC, Gupta V, Rice CA, Maier JP, Lin SH, Lin CK (2011), The visible spectrum of zirconium dioxide, ZrO2, in
JOURNAL OF CHEMICAL PHYSICS, 135(10), xxx-xxx.
Tulej M, Mazzotti FJ, Maier JP (2011), Two-Color Photodetachment Study of the A(3)Pi-X-3 Sigma(-) Origin Band of C5H-, in
JOURNAL OF PHYSICAL CHEMISTRY A, 115(25), 6878-6881.
Morse MD, Maier JP (2011), DETECTION OF NONPOLAR IONS IN (2)Pi(3/2) STATES BY RADIOASTRONOMY VIA MAGNETIC DIPOLE TRANSITIONS, in
ASTROPHYSICAL JOURNAL, 732(2), xxx-xxx.
Mazzotti FJ, Raghunandan R, Esmail AM, Tulej M, Maier JP (2011), Characterization of C4H in the A(2)Pi and X-2 Sigma(+) states by double resonance four-wave mixing, in
JOURNAL OF CHEMICAL PHYSICS, 134(16), xxx-xxx.
Maier JP, Chakrabarty S, Mazzotti FJ, Rice CA, Dietsche R, Walker GAH, Bohlender DA (2011), ASSIGNMENT OF 5069 angstrom DIFFUSE INTERSTELLAR BAND TO HC4H+: DISAGREEMENT WITH LABORATORY ABSORPTION BAND, in
ASTROPHYSICAL JOURNAL LETTERS, 729(2), xxx-xxx.
Garkusha I, Fulara J, Nagy A, Maier JP (2011), ELECTRONIC ABSORPTION SPECTRA OF PROTONATED ANTHRACENES AND PHENANTHRENES, AND THEIR NEUTRALS IN NEON MATRICES, in
ASTROPHYSICAL JOURNAL, 728(2), xxx-xxx.
Maier JP, Walker GAH, Bohlender DA, Mazzotti FJ, Raghunandan R, Fulara J, Garkusha I, Nagy A (2011), IDENTIFICATION OF H2CCC AS A DIFFUSE INTERSTELLAR BAND CARRIER, in
ASTROPHYSICAL JOURNAL, 726(1), xxx-xxx.
Nagarajan R, Maier JP (2010), Electronic spectra of carbon chains and derivatives, in
INTERNATIONAL REVIEWS IN PHYSICAL CHEMISTRY, 29(3), 521-554.
Tulej M, Pino T, Pachkov M, Maier JP (2010), Electronic transitions of the C5H- anion, in
MOLECULAR PHYSICS, 108(7-9), 865-871.
Maier JP, Willitsch S (2010), Spectroscopy and Chemical Dynamics, in
CHIMIA, 64(12), 855-858.
Zhuang XJ, Le A, Steimle TC, Nagarajan R, Gupta V, Maier JP (2010), Visible spectrum of titanium dioxide, in
PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 12(45), 15018-15028.
Garkusha I, Fulara J, Nagy A, Maier JP (2010), Electronic Transitions of Protonated Benzene and Fulvene, and of C6H7 Isomers in Neon Matrices, in
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 132(42), 14979-14985.
Rice CA, Rudnev V, Dietsche R, Maier JP (2010), GAS-PHASE ELECTRONIC SPECTRA OF POLYACETYLENE CATIONS: RELEVANCE OF HIGHER EXCITED STATES, in
ASTRONOMICAL JOURNAL, 140(1), 203-205.
Fulara J, Nagy A, Garkusha I, Maier JP (2010), Higher energy electronic transitions of HC2n+1H+ (n=2-7) and HC2n+1H (n=4-7) in neon matrices, in
JOURNAL OF CHEMICAL PHYSICS, 133(2), xxx-xxx.
Raghunandan R, Mazzotti FJ, Maier JP (2010), Electronic Spectra of C6H+ and C6H3+ in the Gas Phase, in
JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY, 21(5), 694-697.
Linnartz H, Wehres N, Van Winckel H, Walker GAH, Bohlender DA, Tielens AGGM, Motylewski T, Maier JP (2010), A coincidence between a hydrocarbon plasma absorption spectrum and the lambda 5450 DIB, in
ASTRONOMY & ASTROPHYSICS, 511, xxx-xxx.
Chauhan R, Mazzotti FJ, Raghunandan R, Tulej M, Radi PP, Maier JP (2010), Rotationally Resolved Ground State Vibrational Levels of HC2S Studied by Two-Color Resonant Four-Wave Mixing, in
JOURNAL OF PHYSICAL CHEMISTRY A, 114(9), 3329-3333.
Rice CA, Rudnev V, Chakrabarty S, Maier JP (2010), D-2 Pi(u),C-2 Pi(u) <- X-2 Pi(g) Electronic Transitions of NCCN+, in
JOURNAL OF PHYSICAL CHEMISTRY A, 114(4), 1684-1687.
Mitrushchenkov A, Linguerri R, Rosmus P, Maier JP (2009), Alternation of the spin-orbit coupling in the 2 ground state of HCnS (n=1-12) radicals, in
MOLECULAR PHYSICS, 107(15), 1549-1553.
Raghunandan R, Mazzotti FJ, Chauhan R, Tulej M, Maier JP (2009), Selective Detection of Radicals and Ions in a Slit-Jet Discharge by Degenerate and Two-Color Four-Wave Mixing, in
JOURNAL OF PHYSICAL CHEMISTRY A, 113(47), 13402-13406.
Apetrei C, Nagarajan R, Maier JP (2009), Gas Phase 1(1)Sigma(+)(u) <- 1(1)Sigma(+)(g) Electronic Spectra of Polyacetylenes HC2nH, n = 5-7, in
JOURNAL OF PHYSICAL CHEMISTRY A, 113(42), 11099-11100.
Apetrei C, Knight AEW, Chasovskikh E, Jochnowitz EB, Ding H, Maier JP (2009), Gas phase electronic spectrum of T-shaped AlC2 radical, in
JOURNAL OF CHEMICAL PHYSICS, 131(6), xxx-xxx.
Wang HL, Steimle TC, Apetrei C, Maier JP (2009), Characterization of the (X)over-tilde(1)A(1), and (A)over-tilde(1)B(2) electronic states of titanium dioxide, TiO2, in
PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 11(15), 2649-2656.
Rice C., Maier J. P.,
Electronic spectra of potential carriers of diffuse interstellar bands, Wiley, xxxxxxxxx.
Stanton J. F., Garand E., Kim J., Yacovitch T. I., Hock C., Case A. C., Miller E. M., Lu Y-Y., Vogelhuber K. M., Wren S. W., Ichino T., Maier J. P., McMahon R. J., Osborn D. L., Neumark D. M., Lineberger W. C., Ground and Low-lying excited states of propadienylidene (H(2)CCC:) obtained by negative ion photoelectron spectroscopy, in
J. Chem. Phys..
Reilly N. J., Kokkin D. L., Juang X., Gupta V., Nagarajan R., Fortenberry R. C., Maier J. P., Steimle T. C., Stanton J. F., McCarthy M. C., The electronic spectrum of Si(3): Triplet D(3h) System, in
J. Chem. Phys..
The project uses a number of techniques to detect for the first time the electronic spectra of radicals and ions. The species chosen for the investigations are those of astronomical and chemical interest. In particular these focus on carbon chains, rings, their simple derivatives including hydrogen, oxygen, some metals and their ions. Initial information on the systems is often obtained by measuring the electronic spectra through absorption in 6 K neon matrices using mass-selected ion beams. In the gas-phase the transient molecules are produced in discharges and laser vaporization sources coupled with supersonic free jets. The transitions are searched for with laser based approaches including cavity ring-down, laser induced fluorescence, degenerate four-wave mixing and resonant multiphoton spectroscopies. Specific for the study of larger cations is an instrument using ion trapping technology. Mass selected ions are constrained in a 22-pole radiofrequency trap where they are cooled by collisions to around 20 K. The electronic transitions are measured by approaches resembling REMPI schemes, but in this case on cations. Each of these techniques has a dedicated instrument for this purpose and the methods are used hand in hand to achieve the goals.The transient species being focused on for astrophysical reasons are chosen in view of the knowledge gained by us in this area over the past decade. These results dictate the spectroscopic and physical characteristics required of the systems to be relevant as potential carriers of the diffuse interstellar band absorptions. Apart from the wavelength criterium that the species have to absorb in the optical region, the oscillator strength of the transitions has to be large. This selects several of the systems for our studies, in particular some of the longer carbon chains and those containing metals. The information obtained from the observation and analysis of the spectra provides basic fundamental data on the electronic structure, bonding and geometry of the species. In addition spectroscopy offers means to identify the molecules in various not easily accessible environments, including regions in interstellar space, planetary atmospheres, flames, plasmas and as intermediates in chemical reactions.