Photophysics of polycyclic aromatic molecules on semiconductor powders

1983 ◽  
Vol 105 (21) ◽  
pp. 6383-6389 ◽  
Author(s):  
K. Chandrasekaran ◽  
J. K. Thomas
Keyword(s):  
Aromatic Molecules ◽  
Polycyclic Aromatic

Triplet state dynamics in polycyclic aromatic molecules

1974 ◽  
Vol 27 (4) ◽  
pp. 556-561 ◽  
Author(s):  
Richard H. Clarke ◽  
John M. Hayes
Keyword(s):  
Triplet State ◽  
Aromatic Molecules ◽  
Polycyclic Aromatic

Graphene in Titan

2021 ◽  
Author(s):  
Rahul Kumar Kushwaha ◽  
Ambresh Mallya ◽  
Dipen Sahu ◽  
Jaya Krishna Meka ◽  
Sheng-Lung Chou ◽  
...  
Keyword(s):  
Room Temperature ◽  
Laboratory Experiments ◽  
Vacuum Ultraviolet ◽  
Physical Nature ◽  
Potassium Bromide ◽  
Aromatic Molecules ◽  
Transmission Electron ◽  
Polycyclic Aromatic ◽  
Plasma Spectrometer ◽  
Electron Microscopes

<p>Benzene (C<sub>6</sub>H<sub>6</sub>) ice has been observed in the Titan’s stratosphere [1], and benzonitrile (C<sub>6</sub>H<sub>5</sub>CN) is a possible constituent in the benzene and nitrogen-rich environment of Titan’s atmosphere [2]. The energetic processing of such aromatic molecules can synthesize large and complex aromatic molecules such as the Polycyclic Aromatic Hydrocarbons (PAHs). To-date a number of laboratory experiments have reported the formation of complex organics from the energetic processing of aromatic molecules [3-6]. In particular, Scanning Electron Microscopy (SEM) micrographs of the residues resulting from irradiated benzene ices are found to contain geometrically shaped particles [6]. Therefore, by employing electron microscopes, we can understand the physical nature of the dust leftover from the aromatic molecule irradiation.</p> <p>In the present investigation, we subjected benzonitrile ice made at 4 K to vacuum ultraviolet (9 eV) radiation at two beamlines, BL03 and BL21A2 of Taiwan Light Source at NSRRC, Taiwan. After irradiation, the ice was warmed to room temperature, which left a brownish residue on the Potassium Bromide (KBr) substrate. The VUV spectrum of the residue is observed to have characteristic aromatic signatures. The residue is then transferred to a quantifoil grid for High-Resolution Transmission Electron Microscope (HR- TEM) imaging. HR-TEM micrographs revealed the presence of graphene in the residue. This result suggests that N-graphene could be present in benzene and nitrogen-rich icy clouds of Titan. The high masses observed by the Cassini plasma spectrometer in Titan’s atmosphere could then be attributed to the presence of N-graphene along with the more common tholins [7].</p> <p><strong>References</strong></p> <p>[1] Vinatier S. et al. (2018) <em>Icarus, 310,</em> 89.</p> <p>[2] Loison J. C. et al. (2019) <em>Icarus 329,</em> 55.</p> <p>[3] Strazzulla G. et al. (1991) <em>A&A, 241</em>, 310.</p> <p>[4] Callahan M. P. et al. (2013) <em>Icarus, 226</em>, 1201.</p> <p>[5] James R. et al. (2019) <em>RSC Adv. 9</em> (10), 5453.</p> <p>[6] Rahul K. K. et al. (2020) <em>Spectrochim. Acta A, 231, </em>117797.</p> <p>[7] Rahul K. K. et al. (2020) <em>arXiv:2008.10011</em>.</p>

Two‐Photon Laser Excitation of Polycyclic Aromatic Molecules

1967 ◽  
Vol 47 (5) ◽  
pp. 1609-1619 ◽  
Author(s):  
Mark W. Dowley ◽  
Kenneth B. Eisenthal ◽  
Warner L. Peticolas
Keyword(s):  
Laser Excitation ◽  
Aromatic Molecules ◽  
Two Photon ◽  
Polycyclic Aromatic

Supramolecular Organization of Model Polycyclic Aromatic Molecules: Comparison of 2D and 3D Assemblies

ChemNanoMat ◽  
2019 ◽  
Vol 6 (1) ◽  
pp. 68-72
Author(s):  
Gijo Raj ◽  
Yoshihiro Kikkawa ◽  
Luca Catalano ◽  
Renu Pasricha ◽  
Yasuo Norikane ◽  
...  
Keyword(s):  
Supramolecular Organization ◽  
Aromatic Molecules ◽  
Polycyclic Aromatic ◽  
2D And 3D

ChemInform Abstract: STRAINED POLYCYCLIC AROMATIC MOLECULES. I. SYNTHESIS OF 9-BROMODINAPHTH(1,2-A-2′,1′-J)ANTHRACENE

1978 ◽  
Vol 9 (34) ◽  
Author(s):  
C. F. JUN. WILCOX ◽  
P. M. LAHTI ◽  
J. R. ROCCA ◽  
M. B. HALPERN ◽  
J. MEINWALD
Keyword(s):  
Aromatic Molecules ◽  
Polycyclic Aromatic
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