Molecular Fluorescence, Phosphorescence, and Chemiluminescence Spectrometry

Warner, Isiah M.; Soper, Steven A.; McGown, Linda B.

doi:10.1021/a19600045

Cited by 41 publications

(15 citation statements)

References 284 publications

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“…Fluorescence techniques have been extensively used as sensitive tools in many areas of science and technology [1][2][3]. Fluorescence probes find applications as sensors for biomolecules [4][5][6][7][8], in medical diagnostic kits [9], as well as analytical tools in combating biological warfare [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Reduction of Self-Quenching in Fluorescent Silica-Coated Silver Nanoparticles

et al. 2008

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This paper reports the development of spherical Ag@SiO 2 nanocomposites in which fluorescein isothiocyanate molecules have been incorporated using a silane coupling agent and a straightforward microemulsion-based synthesis procedure. The photophysical characteristics of core-shell and coreless nanostructures with similar silica shell thickness and fluorophore densities are measured and compared, and show unequivocally that the presence of the silver core decreases the fluorophore lifetime by a factor as high as 4 and that the steady-state fluorescence intensity is increased by a factor as high as 3. The relationship between the enhancement in fluorescence yield and the influence of the silver core on resonance energy transfer processes was examined by fluorescence lifetime and anisotropy measurements. These Ag@SiO 2 core-shell nanoparticles provide higher detectability and lower self-quenching, whereas the faster recycling time offers more robustness toward photobleaching.

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Section: Introductionmentioning

confidence: 99%

Reduction of Self-Quenching in Fluorescent Silica-Coated Silver Nanoparticles

et al. 2008

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“…The reaction contents were stirred for about 6 h at 25 C. The solution was poured into a beaker containing a crushed ice-cold water. This was followed by acidication of the reaction contents using dilute HCl until the solution was neutralized to afford solid products 6, 9 and 11a-c, which were ltered, washed with chilled water, dried and recrystallized with aqueous ethanol to obtain compounds 6, 9 and 11a-c. (8). In a round bottom ask tted with a reux condenser, compound 7 (1 mmol, 0.93 gm) and porphyrin-2-carbaldehyde (0.002 mmol, 0.676 gm) were dissolved in N,N-dimethylformamide by heating for 24 h with magnetic stirring in presence of piperidine as a catalyst under nitrogen gas.…”

Section: Resultsmentioning

confidence: 99%

“…In this letter, we have developed an unprecedented, original two-component, one-pot approach for the synthesis of highly substituted methine cyanine dyes 3,6,7,8,9,10,11,12,14 …”

Section: Resultsmentioning

confidence: 99%

“…[2][3][4][5] Additionally, for the last several years, there has been considerable progress 6,7 in the synthesis and applications of methine cyanine dyes, which are among the most inuential functional organic dyes. They have been used as photographic sensitizers, 8 optical recording materials in laser disks 9 and sensitizers in photovoltaic cells. 10 With the growth of relative technologies, methine cyanine dyes have been screened as tools in photodynamic treatment 11 and as uorescent labels, micelles, organelles and probes for cells.…”

Section: Introductionmentioning

confidence: 99%

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Thiocarbamoyl in synthesis of the absorbent bis-mono and dimethine cyanine dyes incorporating porphyrin, thiazoles, thiazolones, thiadiazoles, pyrazoles and pyrazolones

El‐Mekawy

Fadda

2017

RSC Adv.

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In this study, we have introduced an outlook dealing with synthetic heteroarenium-substituted pyridines 1 that are suitable as starting materials for the synthesis of a potential new thiocarbamoyl derivative 3 that may be of value in preparative organic and biological chemistry. Herein, a new series of twelve bis-mono and dimethine cyanine dyes incorporating different heterocyclic compounds were designed by efficient and simple reaction of compound 3 with various organic reagents to overcome the obstacles of energetic reactions, because they took long times. Moreover, the electronic behaviors of these compounds were studied because of their significant activity in many medical and other fields. The photosensitizers were elucidated by spectral and analytical analyses.

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“…[1] These microheterogeneous systems can be classified into: molecular aggregates (micelles, vesicles, monolayers, etc.) and polymolecular species (polysilicates such as zeolites; polysugars such as cyclodextrins (CD); polyethers such as crown ethers ).…”

Section: Introductionmentioning

confidence: 99%