Time-resolved synchrotron spectroscopy of exciton fluorescence in anthracene single crystals

Mitani, Tadaoki; Yamanaka, Tatsuhiko; Suzui, Mitsukazu; Horigome, Toshio; Hayakawa, Kazuo; Yamazaki, Iwao

doi:10.1016/0022-2313(88)90012-9

Cited by 10 publications

(5 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In more concentrated solutions, as well as on the water surface after long deposition times, the absolute intensity of the 380 nm peak begins to decrease, while the intensities of the other peaks continue to increase. This spectral shift can likely be attributed to self-association of anthracene: Crystalline anthracene does not fluoresce at 381 nm, and the greatest intensity shifts to the band at 420 nm, ,− as we see at high surface coverages on glass surfaces, and as others have observed on alumina and silica gel surfaces. , On ice, the fluorescence spectrum that we see even at the shortest deposition times resembles that of crystalline anthracene.…”

Section: Discussionsupporting

confidence: 69%

Photolysis of Polycyclic Aromatic Hydrocarbons on Water and Ice Surfaces

2007

View full text Add to dashboard Cite

Laser-induced fluorescence detection was used to measure photolysis rates of anthracene and naphthalene at the air-ice interface, and the kinetics were compared to those observed in water solution and at the air-water interface. Direct photolysis proceeds much more quickly at the air-ice interface than at the air-water interface, whereas indirect photolysis due to the presence of nitrate or hydrogen peroxide appears to be suppressed at the ice surface with respect to the liquid water surface. Both naphthalene and anthracene self-associate readily on the ice surface, but not on the water surface. The increase in photolysis rates observed on ice surfaces is not due to this self-association, however. The wavelength dependence of the photolysis indicates that it is due to absorption by the PAH. No dependence of the rate on temperature is seen, either at the liquid water surface or at the ice surface. Molecular oxygen appears to play a complex role in the photolytic loss mechanism, increasing or decreasing the photolysis rate depending on its concentration.

show abstract

Section: Discussionsupporting

confidence: 69%

Photolysis of Polycyclic Aromatic Hydrocarbons on Water and Ice Surfaces

2007

View full text Add to dashboard Cite

show abstract

“…A single-exponential decay profile was observed, resulting in a lifetime of 2.21 ns that can be assigned to pure fluorescence emission. 35,36 The decay spectrum recorded at 650 nm shows a fluorescence emission with a decay time of 0.92 ns, in agreement with the emission arising from the π−π stacking in the film (Figure S4). Absolute photoluminescence quantum yields (PLQYs) of 97% and 17% were obtained for the dichloromethane solution and for the thin film (vacuum deposition at 10 −6 Torr) of bThBODIPY, respectively.…”

Section: ■ Introductionsupporting

confidence: 76%

An Ambipolar BODIPY Derivative for a White Exciplex OLED and Cholesteric Liquid Crystal Laser toward Multifunctional Devices

Chapran

Angioni

Findlay

et al. 2017

ACS Appl. Mater. Interfaces

124

View full text Add to dashboard Cite

A new interface engineering method is demonstrated for the preparation of an efficient white organic light-emitting diode (WOLED) by embedding an ultrathin layer of the novel ambipolar red emissive compound 4,4-difluoro-2,6-di(4-hexylthiopen-2-yl)-1,3,5,7,8-pentamethyl-4-bora-3a,4a-diaza-s-indacene (bThBODIPY) in the exciplex formation region. The compound shows a hole and electron mobility of 3.3 × 10 and 2 × 10 cm V s, respectively, at electric fields higher than 5.3 × 10 V cm. The resulting WOLED exhibited a maximum luminance of 6579 cd m with CIE 1931 color coordinates (0.39; 0.35). The bThBODIPY dye is also demonstrated to be an effective laser dye for a cholesteric liquid crystal (ChLC) laser. New construction of the ChLC laser, by which a flat capillary with an optically isotropic dye solution is sandwiched between two dye-free ChLC cells, provides photonic lasing at a wavelength well matched with that of a dye-doped planar ChLC cell.

show abstract

“…The time period of pulsed radiation was about 176 ns and the width of each pulse was about 1.0 ns. The time-correlated single-photon counting technique was used, of which detail was already described elsewhere (Mitani et al, 1988). In this work, the fluorescence emitted from the samples was detected by a photomultiplier (Hamamatsu Photonics, R4129) through the filter (Toshiba, V-Y42).…”

Section: Time-correlated Single-photon Counting Measurement and Resultsmentioning

confidence: 99%

Evolution of energy deposition processes in anthracene single crystal from photochemistry to radiation chemistry under excitation with synchrotron radiation from 3 to 700eV

Nakagawa

Zhang

Shimoyama

et al. 2008

Radiation Physics and Chemistry

View full text Add to dashboard Cite

Time-resolved synchrotron spectroscopy of exciton fluorescence in anthracene single crystals

Cited by 10 publications

References 24 publications

Photolysis of Polycyclic Aromatic Hydrocarbons on Water and Ice Surfaces

Photolysis of Polycyclic Aromatic Hydrocarbons on Water and Ice Surfaces

An Ambipolar BODIPY Derivative for a White Exciplex OLED and Cholesteric Liquid Crystal Laser toward Multifunctional Devices

Evolution of energy deposition processes in anthracene single crystal from photochemistry to radiation chemistry under excitation with synchrotron radiation from 3 to 700eV

Contact Info

Product

Resources

About