Study of properties on non-protected room temperature phosphorescence and delayed excimer fluorescence of pyrene solution

Li, Long-Di; Zhang, Zhongxiao; Long, Wu Qiang; Tong, Aijun

doi:10.1016/s1386-1425(00)00396-6

Cited by 16 publications

(13 citation statements)

References 12 publications

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“…22,23 What we have here is the calixarene protection from the oxygen existing in the air because of the inclusion complex formation and at the same time some pyrene also remained outside the calixarene cavities forming "pools" of pyrene microcrystals. A similar behavior was reported by us for benzophenone included within calix[n]arenes (n ) 4, 6, and 8) 8 and microcrystalline cellulose.…”

Section: Resultsmentioning

confidence: 96%

Luminescence Lifetime Distributions Analysis in Heterogeneous Systems by the Use of Excel's Solver

Branco¹,

Rego²,

Machado³

et al. 2005

J. Phys. Chem. B

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A detailed study of the luminescence decay curves of pyrene included within p-tert-butylcalix [4]arene cavities and benzophenone into silicalite channels is reported. A new methodology for a lifetime distribution analysis of the decay curve of probes onto heterogeneous surfaces is presented, which allows for asymmetric distributions and uses Voigt profiles (Gaussian and Lorentzian mixture) instead of pure Gaussian or Lorentzian distributions. Our approach uses a very simple and widely available tool for fitting, the Microsoft Excel Solver. In the case of the pyrene/tert-butylcalix[4]arene sample, the room temperature luminescence detected in the microsecond time scale was not only the phosphorescence of pyrene but also monomer delayed fluorescence, crystal phosphorescence, and excimer delayed fluorescence. In the benzophenone/silicalite case, three emissive forms of benzophenone could be assigned, one of benzophenone included into the silicalite circular zigzag channels, another for emplacement into the elliptical straight channels and finally when benzophenone is placed at the crossing points of those silicalite channels, where smaller spatial restrictions for benzophenone exist.

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Section: Resultsmentioning

confidence: 96%

Luminescence Lifetime Distributions Analysis in Heterogeneous Systems by the Use of Excel's Solver

Branco¹,

Rego²,

Machado³

et al. 2005

J. Phys. Chem. B

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“…The most important limitations relate to the poor absorption profile, [8] the susceptibility towards excimer formation, [9] oxygen quenching of the fluorescence intensity [10] and the relatively low fluorescence quantum yield. [11] Of course, pyrene exhibits many beneficial properties such as its ready functionalization [12] and appearance of delayed fluorescence [13] that add to its attractiveness as a fluorescent tag. We now describe a simple derivative of pyrene that displays improved optical properties in solution.…”

Section: Introductionmentioning

confidence: 99%

A Closely‐Coupled Pyrene Dimer Having Unusually Intense Fluorescence

Benniston¹,

Harriman²,

Lawrie³

et al. 2004

Eur J Org Chem

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A synthetic route is described for the preparation of 1,4-di(1-pyrenyl)butadiyne. The target compound, after purification by extensive column chromatography, has been characterized by NMR and exact-mass spectrometry. This material is highly-fluorescent in solution and, relative to pyrene, strongly absorbing in the near-UV region. Phosphorescence is observed at 77 K and formation of the metastable triplet

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“…(12)(13)(14)(15)(16)(17)(18)(19)(20)(21). Only a few studies have been concerned with tri-ring PAH (22,23) or tetra-ring PAH (24). We found in a study with pyrene…”

Section: Introductionmentioning

confidence: 90%

“…Because of their poor solubility in water, the addition of organic solvent is often unavoidable in practical work, such as in separation and pre-treatment of sample. Thus, the phosphorescence behaviour of three tetra-ring aromatic hydrocarbons with different structure-1-sodium pyrenesulphonate (NaPy), benz[α]anthracene and chrysene under different conditions and in the presence of different solventswere studied and compared with pyrene (24). The chemical structures of three tetra-ring aromatic hydrocarbons are shown in Fig.…”

mentioning

confidence: 99%

Comparison of properties on non‐protected fluid room temperature phosphorescence of some tetra‐ring aromatic hydrocarbons

Zhang

et al. 2005

Luminescence

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A comparative study of the photoluminescence properties of three kinds of tetra-ring aromatic hydrocarbon (1-sodium pyrenesulphonate, benz[alpha]anthracene and chrysene) solution in the absence of any protecting medium is described. It was found that a room temperature phosphorescence signal with different intensities can be induced for these solutions, using only TlNO3 or KI as a heavy atom perturber (HAP) and Na2SO3 as a deoxygenator. An appropriate amount of organic solvent added to the systems of pyrene, benz[alpha]anthracene and chrysene is necessary for increasing the solubility and phosphorescence intensity, and the preferable solvent is acetonitrile. For the pyrene, pyrenesulphonate and chrysene systems, a delayed excimer fluorescence accompanied with the room temperature phosphorescence (RTP) emission can be observed, but that for benz[alpha]anthracene cannot. The ratio of delayed excimer fluorescence and phosphorescence signals for pyrene, pyrenesulphonate and chrysene systems can be controlled by adjusting the concentration of luminophor, kinds and amount of both organic solvents and HAP. Under the optimal conditions, the RTP signals are proportional to the concentration of the four aromatic hydrocarbons, which means that the RTP properties of the four tetra-ring aromatic hydrocarbons can be used for quantitative analysis.

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Study of properties on non-protected room temperature phosphorescence and delayed excimer fluorescence of pyrene solution

Cited by 16 publications

References 12 publications

Luminescence Lifetime Distributions Analysis in Heterogeneous Systems by the Use of Excel's Solver

Luminescence Lifetime Distributions Analysis in Heterogeneous Systems by the Use of Excel's Solver

A Closely‐Coupled Pyrene Dimer Having Unusually Intense Fluorescence

Comparison of properties on non‐protected fluid room temperature phosphorescence of some tetra‐ring aromatic hydrocarbons

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