Raman scattering from molecular crystals—II. Anthracene

Räsänen, J.; Stenman, Folke; Penttinen, Eeva

doi:10.1016/0584-8539(73)80083-2

Cited by 51 publications

(24 citation statements)

References 8 publications

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“…The Raman spectrum for pure anthracene exhibited strong sharp bands at 121, 395, 752, 1401, and 1556 cm –1 , which correspond well to those reported in the literature. 52 The PPy bulk powder reference spectrum exhibited strong broad bands at 925, 1066, 1237, 1370, and 1592 cm –1 , which are in good agreement with our previously reported observations. 47 − 51 …”

Section: Resultssupporting

confidence: 92%

“…The five most intense Raman lines in the pure anthracene crystals are at 121, 395, 752, 1401, and 1556 cm –1 (see vertical dashed lines), which is in good agreement with the literature. 52 The two spectra obtained for the PPy-coated anthracene microparticles are both dominated by signals from the conducting polymer component owing to a resonance Raman effect.…”

Section: Resultsmentioning

confidence: 99%

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Synthesis and Characterization of Polypyrrole-Coated Anthracene Microparticles: A New Synthetic Mimic for Polyaromatic Hydrocarbon-Based Cosmic Dust

Chan

Millet

Fisher

et al. 2021

ACS Appl. Mater. Interfaces

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Polyaromatic hydrocarbons (PAHs) are found throughout the universe. The ubiquity of these organic molecules means that they are of considerable interest in the context of cosmic dust, which typically travels at hypervelocities (>1 km s –1 ) within our solar system. However, studying such fast-moving micrometer-sized particles in laboratory-based experiments requires suitable synthetic mimics. Herein, we use ball-milling to produce microparticles of anthracene, which is the simplest member of the PAH family. Size control can be achieved by varying the milling time in the presence of a suitable anionic commercial polymeric dispersant (Morwet D-425). These anthracene microparticles are then coated with a thin overlayer of polypyrrole (PPy), which is an air-stable organic conducting polymer. The uncoated and PPy-coated anthracene microparticles are characterized in terms of their particle size, surface morphology, and chemical structure using optical microscopy, scanning electron microscopy, laser diffraction, aqueous electrophoresis, FT-IR spectroscopy, Raman microscopy, and X-ray photoelectron spectroscopy (XPS). Moreover, such microparticles can be accelerated up to hypervelocities using a light gas gun. Finally, studies of impact craters indicate carbon debris, so they are expected to serve as the first synthetic mimic for PAH-based cosmic dust.

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Section: Resultssupporting

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Synthesis and Characterization of Polypyrrole-Coated Anthracene Microparticles: A New Synthetic Mimic for Polyaromatic Hydrocarbon-Based Cosmic Dust

Chan

Millet

Fisher

et al. 2021

ACS Appl. Mater. Interfaces

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“…22 Many of these bands have been observed in the CW Raman spectra of anthracene. 32,33 Some, however, were not assigned, notably the 9a g and 8a g modes at 835 and 845 cm -1 in anthracene-d 10 , respectively, which were not resolved in previously reported spectra. The location of mode 11b 3g in anthracene-h 10 is uncertain.…”

Section: Discussionmentioning

confidence: 53%

Picosecond Time-Resolved Fourier-Transform Raman Spectroscopy and Normal-Mode Analysis of the Ground State and Singlet Excited State of Anthracene

et al. 1996

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Time-resolved Fourier-transform Raman spectra of the first singlet excited states of anthracene and deuterated anthracene have been measured with photoexcitation at 355 nm. Raman scattering was excited by 100-ps pulses at 1064 nm, resonant with the S 3 r S 1 transition. Continuous wave (CW) Fourier-transform Raman spectra were also measured for anthracene and anthracene-d 10 in the ground state. Ab initio calculations were carried out at the HF/6-31G and HF/6-31G* levels for the ground state and at the CIS/6-31G and CIS/ 6-31G* levels for the excited state to generate a complete normal-mode analysis of both ground and excited states. Excellent agreement between the computational and experimental Raman frequencies is observed for anthracene and anthracene-d 10 for both the ground and excited states after the computed frequencies were scaled by a single scaling factor of 0.9. In several cases, comparison with calculated frequencies allows previously ambiguous vibrational assignments to be clarified. Evidence of interaction of the excited state with the solvent is observed for alkanes, but not alcohols, in an enhanced Raman intensity of solvent C-H stretching modes.

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“…Fiber data has ±1 cm −1 agreement with anthracene crystal data spectrum (indicated by triangular markers) [30]. …”

Section: Resultsmentioning

confidence: 88%

Anthracene Fibers Grown in a Microstructured Optical Fiber for X-ray Detection

2014

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Anthracene fibers are grown inside a microstructured quartz matrix to form a multicore optical fiber for X-ray detection. A modified fiber growth method for single crystal anthracene from the melt via the Bridgman-Stockbarger technique is presented. The anthracene fiber is characterized by using spectrophotometry, Raman spectroscopy, and X-ray diffraction. These results show the anthracene grown in fiber has high purity and a crystal structure similar to anthracene grown from liquid, vapor, and melt techniques. As an X-ray detector, the output is 12%–16% efficient between the energy ranges of 40 and 10 keV. The effect of materials and fiber processing are discussed.

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Raman scattering from molecular crystals—II. Anthracene

Cited by 51 publications

References 8 publications

Synthesis and Characterization of Polypyrrole-Coated Anthracene Microparticles: A New Synthetic Mimic for Polyaromatic Hydrocarbon-Based Cosmic Dust

Synthesis and Characterization of Polypyrrole-Coated Anthracene Microparticles: A New Synthetic Mimic for Polyaromatic Hydrocarbon-Based Cosmic Dust

Picosecond Time-Resolved Fourier-Transform Raman Spectroscopy and Normal-Mode Analysis of the Ground State and Singlet Excited State of Anthracene

Anthracene Fibers Grown in a Microstructured Optical Fiber for X-ray Detection

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