Jet-Cooled Spectroscopy of 1- Naphthylmethyl, 2-Naphthylmethyl & Acenaphthenyl Radicals Nahid Chalyavi.

Slides:

Advertisements

Similar presentations

Preliminary Laboratory Studies of the Photoprocessing of PAH / H 2 O Mixtures in the Interstellar Medium John Thrower Department of Chemistry, School of.

Advertisements

Non-radiative decay pathways of the first excited electronic states of 1:1 hydrogen bonded complexes of 7-azaindole with phenol and formamide IACS Moitrayee.

Thermodynamik, IVG, Universität Duisburg-Essen B. Atakan ,1 Fuel rich flame chemistry Experimental studies applying mass spectrometry and laser.

Condensed phase vs. Isolated gas phase spectra Solution phase A A A A A A W W W W W WW W W W W W W W W W W W: water A: sample ( nm) ( nm) Isolated.

The ultraviolet spectroscopy of phenylcyclopentene and phenylcyclopentadiene. Josh J. Newby, Ching-Ping Liu, Christian Müller and Timothy S. Zwier FD02.

D.L. KOKKIN, N.J. REILLY, J.A. JOESTER, M. NAKAJIMA, K. NAUTA, S.H. KABLE and T.W. SCHMIDT Direct Observation of the c State of C 2 School of Chemistry,

Electronic Spectroscopy of 1-Methylpyrene cation and related species. D. Kokkin, C. Marshall, A. Bonnamy, And C. Joblin and A. Simon.

Electronic Spectroscopy of long Carbon Chains HC 2n H (n= 8-13) in the Gas Phase Felix Güthe*, Hongbin Ding, Thomas Pino and John P. Maier Institut für.

Diagnosis of a benzene discharge with a mass-selective spectroscopic technique Felix Güthe, Hongbin Ding, Thomas Pino and John P. Maier Institute of Physical.

Stimulated Raman scattering If high enough powered radiation is incident on the molecule, stimulated Anti-Stokes radiation can be generated. The occurrence.

Laser Induced Fluorescence Structural information about the ground and excited states of molecules. Excitation experiments  Excited state information.

Spectroscopic Investigation of o-, m-, and p-Cyanostyrenes International Symposium for Molecular Spectroscopy FE-12 Joseph A. Korn †, Stephanie N. Knezz.

VIBRONIC SPECTROSCOPY OF THE PHENYLCYANOMETHYL RADICAL 6/23/11 1 DEEPALI N. MEHTA, NATHANAEL M. KIDWELL, JOSEPH A. KORN, AND TIMOTHY S. ZWIER 66 th International.

Fluorescence spectroscopy of jet- cooled phenylvinylacetylene in its ground and first excited states Speaker: Ching-Ping Liu Coworkers: Josh Newby and.

Probing the electronic structure of the Nickel Monohalides: Spectroscopy of the low-lying electronic states of NiX (X=Cl, Br, I). Lloyd Muzangwa Molecular.

Nathan R. Pillsbury, Timothy S. Zwier, Department of Chemistry, Purdue University, West Lafayette, IN 47907; David F. Plusquellic, NIST, Gaithersburg,

VADIM L. STAKHURSKY *, LILY ZU †, JINJUN LIU, TERRY A. MILLER Laser Spectroscopy Facility, Department of Chemistry, The Ohio State University 120 W. 18th.

Laboratory of Molecular Spectroscopy & Nano Materials, Pusan National University, Republic of Korea Spectroscopic Identification of New Aromatic Molecular.

Novel Approaches to Doppler-Free Ion Imaging I. Two-Color Reduced-Doppler Imaging II. Doppler-Free/Doppler-Sliced Imaging Cunshun Huang, Wen Li, Sridhar.

Integral field spectroscopy of the Red Rectangle: Unraveling the carrier of the RRBs in 2D. Damian Kokkin, Robert Sharp, Masakazu Nakajima, and Timothy.

Electronic Spectroscopy of Palladium Dimer (Pd 2 ) 68th OSU International Symposium on Molecular Spectroscopy Yue Qian, Y. W. Ng and A. S-C. Cheung Department.

Electronic Spectroscopy of DHPH Revisited: Potential Energy Surfaces along Different Low Frequency Coordinates Leonardo Alvarez-Valtierra and David W.

Ionization Energy Measurements and Spectroscopy of HfO and HfO+

Wbt1 Chapter 10. REMPI, ZEKE, and MATI Spectroscopies Resonance-enhanced multiphoton ionization (REMPI) spectroscopy involves more than one photons in.

Higher Electronic Excited States of Jet-Cooled Aromatic Hydrocarbon Radicals: 1-phenylpropargyl (C9H7), 1-naphthylmethyl (C11H9), 2-naphthylmethyl (C11H9)

Interrogating hydrocarbon radicals

Laboratory of Molecular Spectroscopy, Pusan National University, Pusan, Republic of Korea Spectroscopic identification of isomeric trimethylbenzyl radicals.

IDENTIFYING FLUORESCENT HYDROCARBON RADICALS FROM A BENZENE DISCHARGE. Neil J. Reilly, Damian L. Kokkin, Scott H. Kable & Timothy W. Schmidt (Not)

Adrian M. Gardner, Alistair M. Green, Victor M. Tamé-Reyes, Victoria H. K Wilton and Timothy G. Wright Electronic and Photoelectron Spectroscopy of Toluene.

Theoretical Study on Vibronic Interactions and Photophysics of Low-lying Excited Electronic States of Polycyclic Aromatic Hydrocarbons S. Nagaprasad Reddy.

Eirík´s project(?) CH3I: agust,www,...rempi/ch3i/PPT ak.ppt ( )

1 CHIRAL RECOGNITION IN NEUTRAL AND IONIC MOLECULAR COMPLEXES Ananya Sen, Aude Bouchet, Valeria Lepere, Katia Le Barbu Debus, Anne Zehnacker Rentien Institut.

Feb High-resolution Fourier transform emission spectroscopic study of the molecular ions Yoshihiro Nakashima.

IR spectra of Methanol Clusters (CH3OH)n Studied by IR Depletion and VUV Ionization Technique with TOF Mass Spectrometer Department of Applied Chemistry.

1 The Red Rectangle Nebula excited by excited species Nadine Wehres, Claire Romanzin, Hans Van Winckel, Harold Linnartz, Xander Tielens.

Further studies of λ Diffuse Interstellar Band Takeshi Oka, Lew M. Hobbs, Daniel E. Welty, Donald G. York Department of Astronomy and Astrophysics,

Dispersed fluorescence studies of jet-cooled HCF and DCF: Vibrational Structure of the X 1 A state.

TWO-PROTON PHOTOTAUTOMERIZATION DYNAMICS OF 7-AZAINDOLE COMPLEXES -Tapas Chakraborty Indian Association for the Cultivation of Science Calcutta, India.

DISPERSED FLUORESCENCE (DF) SPECTROSCOPY OF JET-COOLED METHYLCYCLOHEXOXY (MCHO) RADICALS Jahangir Alam, Md Asmaul Reza, Amy Mason, Neil Reilly and Jinjun.

Tyler P. Troy, Scott H. Kable, Timothy W. Schmidt Department of Chemistry, University of Sydney Scott A. Reid Department of Chemistry, Marquette University.

Introduction to PhD research Edward Gash 30 June 2004.

Spectroscopic and Theoretical Determination of Accurate CH/  Interaction Energies in Benzene-Hydrocarbon Clusters Asuka Fujii, Hiromasa Hayashi, Jae Woo.

CALIFORNIA INSTITUTE OF TECHNOLOGY TIME DOMAIN TERAHERTZ SPECTROSCOPY OF POLYCYCLIC AROMATIC HYDROCARBONS Brandon Carroll  Marco A. Allodi  Sergio Ioppolo.

INFRARED AND ULTRAVIOLET SPECTROSCOPY OF JET-COOLED 2-BENZYLPHENOL: I STRUCTURE AND LARGE-AMPLITUDE TORSIONAL MOTION CHIRANTHA P. RODRIGO, CHRISTIAN W.

High-resolution Fourier transform emission spectroscopy of the A 2  + – X 2  transition of the BrCN + ion. June 20, 2005, Ohio state Univ. Yoshihiro.

Spectroscopy of the Low- Energy States of BaO + Joshua H. Bartlett, Robert A. VanGundy, Michael C. Heaven 70 th International Symposium on Molecular Spectroscopy.

Md Asmaul Reza, Jahangir Alam, Amy Mason, Neil Reilly and Jinjun Liu Department of Chemistry, University of Louisville JET-COOLED DISPERSED FLUORESCENCE.

Yu-Shu Lin, Cheng-Chung Chen, and Bor-Chen Chang Department of Chemistry National Central University Chung-Li 32001, Taiwan ~ ~ Electronic Spectroscopy.

CONFORMATION-SPECIFIC ELECTRONIC SPECTROSCOPY OF JET-COOLED 5-PHENYL-1-PENTENE NATHAN R. PILLSBURY, TALITHA M. SELBY, AND TIMOTHY S. ZWIER, Department.

SPECTRA OF JET-COOLED ALL- BENZENOID PAHS - TRIPHENYLENE (C 18 H 12 ) AND HEXA-PERI- HEXABENZOCORONENE(C 42 H 18 ) DAMIAN L. KOKKIN, TYLER P. TROY, NEIL.

Gas Phase Infrared Spectroscopy of Mass Selected Carbocations Department of Chemistry University of Georgia Athens Georgia, 30602

William D. Tuttle, Adrian M. Gardner, Laura E. Whalley and

Adrian Gardner, William Tuttle, Peter Groner and Timothy Wright

& DETECTION AND CHARACTERIZATION OF THE STANNYLENE (SnH2) FREE RADICAL.

Theodore P. Snow Nicholas Betts Meredith Drosback Veronica Bierbaum

INFRARED SPECTROSCOPY OF DISILICON-CARBIDE, Si2C

The exotic excited state behavior of 3-phenyl-2-propynenitrile

A Green Bank Telescope Search for ortho-benzyne (o-C6H4) in CRL 618

Mitsunori ARAKI, Hiromichi WAKO, Kei NIWAYAMA and Koichi TSUKIYAMA○

UV Spectroscopy of 3-phenyl-2-propynenitrile

Timothy C. Steimle , T. Maa, S. Muscarella, and Damian Kokkin

Characterization of CHBrCl2 photolysis by velocity map imaging

Tokyo Univ. Science Mitsunori Araki, Yuki Matsushita, Koichi Tsukiyama

Jun Jiang, Angelar Muthike, and Robert W. Field

Thomas D. Varberg, Department of Chemistry, Macalester College, St

Galactic Astronomy 銀河物理学特論 I Lecture 1-6: Multi-wavelength properties of galaxies Seminar: Draine et al. 2007, ApJ, 663, 866 Lecture: 2011/11/14.

Single molecule spectroscopy: towards precision measurements on CaH+

PUMP-PROBE DELAYED IONIZATION STUDY OF PHENYLACETYLENE

The 3 μm emission band from space with molecular beam spectroscopy

OBSERVATION OF LEVEL-SPECIFIC PREDISSOCIATION RATES IN S1 ACETYLENE

Presentation transcript:

Jet-Cooled Spectroscopy of 1- Naphthylmethyl, 2-Naphthylmethyl & Acenaphthenyl Radicals Nahid Chalyavi

2 Astrochemical Significance of PAHs Jenniskens P. et al., Ap.J., 183, 87, 1973 Diffuse Interstellar Bands Cohen M. et al., A & A, 390, 147, 2002 Red Rectangle Bands F.C. Gillett et al., Ap.J., 183, 87, 1973 Unidentified Infrared Bands Interstellar Dust Grain Model Kwok, Nature 430, 985 (2004)

3

4 Resonance-Stabilized Radicals (RSRs) Preferable product from decomposition of stable species Slower rate of reaction and dissociation compared to localized radicals Can reach high concentration in reaction environment

5 Supersonic Jet Expansion

6 Detector Source Extraction of ions Time-Of- Flight MS Resonance-Enhanced Multiphoton Ionization (REMPI) Ionisation continuum  +e - 

7 Laser-Induced Fluorescence (LIF) & Dispersed Fluorescence (DF) Spectroscopy Vibrational Coordinate Energy DF Vibrational Coordinate Energy LIF

8 1-Naphthylmethyl Radical LIF vs. REMPI A' = GHz A" = GHz B' = GHz B" = GHz C' = GHz C" = GHz A' = GHz A" = GHz B' = GHz B" = GHz C' = GHz C" = GHz Band Type: a/b=1.325 Band Origin: cm -1

9 Dispersed Fluorescence (DF)

10 Comparison with RR and DIB Bands The Red Rectangle Emission wavelength has been corrected for the speed of nebulae (18.9 km/sec) The Red Rectangle Emission wavelength has been corrected for the speed of nebulae (18.9 km/sec)

11 2-Naphthylmethyl Radical LIF vs. REMPI

12 Dispersed Fluorescence (DF)

13 Comparison with RR and DIB Bands

14 Acenaphthenyl Radical LIF vs. REMPI

15 Dispersed Fluorescence (DF)

16 Comparison with RR and DIB Bands

17 Conclusions & Future Work Jet-cooled spectroscopy of three resonance-stabilized radicals containing naphthalene moiety has been studied A coincidence is found between 1-naphthylmethyl radical origin transition and a red rectangle emission band The coincidence suggests that some structures similar to these radicals might be the carriers of red rectangle bands Consider other resonance-stabilized radicals with similar structures

18 Acknowledgements Dr. Timothy Schmidt Dr. Rob Sharp Dr. Masakazu Nakajima The Laser Spectroscopy Group