The dynamics of excimer formation in perylene crystals

Auweter, Helmut; Ramer, D.; Kunze, B.; Wolf, H.

doi:10.1016/0009-2614(82)80303-5

Cited by 60 publications

(38 citation statements)

References 17 publications

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“…In α-perylene crystal, the fluorescence peak of E-type excimer is at around 630 nm, while the fluorescence peak of Y-type excimer is at around 530 nm [12]. In L-B films [16,17], these peaks are slightly shifted, but the fluorescence peak of Y-type excimer is consistent with the one of the excimer observed in the present study.…”

Section: Resultssupporting

confidence: 89%

“…Plots both of the intensity (I ) and of its field-induced change (ΔI ) relative to I It is well known that perylene molecules form two types of excimer [12]: 1) E-type excimer which has a sandwich conformation; 2) Y-type excimer which has a partially overlapping conformation. In α-perylene crystal, the fluorescence peak of E-type excimer is at around 630 nm, while the fluorescence peak of Y-type excimer is at around 530 nm [12].…”

Section: Resultsmentioning

confidence: 99%

“…Excimer formation processes of perylene molecules have been studied for a long time under various conditions; in solution [11], in crystalline [12,13], in thin polymer film [14], in polymer matrix [15], in LB film [16,17] and in rigid media [18]. It is well known that perylene excimer shows a characteristic feature at low temperatures [12,13,15,16].…”

Section: Introductionmentioning

confidence: 99%

“…It is well known that perylene excimer shows a characteristic feature at low temperatures [12,13,15,16]. As shown in pyrene [19], a combination of electric field effect and temperature effect on fluorescence is very useful to understand the excited state dynamic of perylene complexes.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

External electric field effects on fluorescence of perylene doped in a polymer film

Ara

Iimori

Yoshizawa

et al. 2006

Chemical Physics Letters

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Abstract:Fluorerescence and electrofluorescence spectra of perylene molecules doped in a polymer film at different concentrations have been measured at different temperatures in the range of 70-295 K. At high concentrations where excimer is formed, LE fluorescence emitted from the locally excited state of perylene is quenched by an electric field at any temperature, indicating a field-induced enhancement of the excimer formation rate. Fluorescence of the Y-type excimer of perylene molecules shows a fieldinduced enhancement at room temperature, whereas it shows a field-induced quenching at low temperatures. The temperature dependence of the electric field effects on fluorescence has been discussed.--

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Section: Resultssupporting

confidence: 89%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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External electric field effects on fluorescence of perylene doped in a polymer film

Ara

Iimori

Yoshizawa

et al. 2006

Chemical Physics Letters

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“…Due to red color emission of excimer, perylene molecules have been used in several biological investigations as well as DNA detection and probing of physical status of membrane [16,17]. Excimer formation processes of perylene molecules have been studied for a long time under various conditions such as in solution, in crystalline, in thin polymer film, in polymer matrix, in LB film [18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the spontaneous emission rate of perylene dye molecules encapsulated into three-dimensional nanofibers via FLIM method

et al. 2014

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The decay dynamics of perylene dye molecules encapsulated in polymer nanofibers produced by electrospinning of polymethyl methacrylate are investigated using a confocal fluorescence lifetime imaging microscopy technique. Time-resolved experiments show that the fluorescence lifetime of perylene dye molecules is enhanced when the dye molecules are encapsulated in a threedimensional photonic environment. It is hard to produce a sustainable host with exactly the same dimensions all the time during fabrication to accommodate dye molecules for enhancement of spontaneous emission rate. The electrospinning method allows us to have a control over fiber diameter. It is observed that the wavelength of monomer excitation of perylene dye molecules is too short to cause enhancement within nanofiber photonic environment of 330 nm diameters. However, when these nanofibers are doped with more concentrated perylene, in addition to monomer excitation, an excimer excitation is generated. This causes observation of the Purcell effect in the threedimensional nanocylindrical photonic fiber geometry.

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Tunable and Thermally Stable Luminescence from Polycyclic Aromatic Hydrocarbons Confined in a Zeolitic Imidazolate Framework

Jong

Martín

et al. 2022

Advanced Optical Materials

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These di-and trichromatic blending strategies may be difficult to implement in the integration process, and can trigger phase separation and color instability during operation. [4][5][6] Another requirement for PC-WLEDs is the stability against thermal quenching, thereby ensuring efficient light emission at working temperatures of up to 200 °C. [7][8][9] Recently, single-phase white-light-emitting materials have been proposed as an alternative strategy to pursue fine color-tunability covering the whole visible spectrum and ensuring high luminescence thermal stability. [10][11][12] The assembly of inorganic and organic photon-emitting components into metalorganic frameworks (MOFs) can result in versatile platforms for generating luminescent functionalities. [13][14][15][16][17][18] In addition to the intrinsic luminescence of the metal and/or the linker, the high degree of porosity in MOFs allows the confinement of luminescent guests. [19][20][21][22][23] The luminescence of such host-guest systems can be tuned by engineering the interactions of the guest with the constituents of the MOFs, offering the opportunity to create single-phase white-light emission. [24][25][26][27][28][29][30][31][32][33] In addition, the Metal-organic frameworks (MOFs) can provide a variety of nanocompartments for the confinement of guest molecules. Furthermore, the emissions of fluorescent molecules can be tuned by confinement. In this study, a solvent-free "bottle-around-ship" method is used to encapsulate perylene and 9,10-dimethylanthracene, two polycyclic aromatic hydrocarbons, in the MOF ZIF-8. Luminescence color tuning is achieved, including white-light emission, when controlling the loading of only a single type of guest. Photophysical analysis suggests that the variations in luminescence result from various guest arrangements in the nanocompartments, as well as host-guest interactions. Because of the tight confinement of the guests, this host-guest system displays excellent luminescence thermal stability.

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The dynamics of excimer formation in perylene crystals

Cited by 60 publications

References 17 publications

External electric field effects on fluorescence of perylene doped in a polymer film

External electric field effects on fluorescence of perylene doped in a polymer film

Investigation of the spontaneous emission rate of perylene dye molecules encapsulated into three-dimensional nanofibers via FLIM method

Tunable and Thermally Stable Luminescence from Polycyclic Aromatic Hydrocarbons Confined in a Zeolitic Imidazolate Framework

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