Fluorescence thermometers using intramolecular exciplexes

Gossage, Henry E.; Melton, L. A.

doi:10.1364/ao.26.002256

Cited by 48 publications

(13 citation statements)

References 4 publications

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“…Temperature was measured using the thermal dependence of the florescence of excited-state complex (exciplex) produced by the association of an excited molecule (excimer) and a ground-state molecule (monomer) (Murray and Melton 1985;Gossage and Melton 1987). One of the main drawbacks of this method is its high quenching by oxygen, which may require operating in an oxygen-free medium.…”

Section: Introductionmentioning

confidence: 99%

Study of the droplet size effect coupled with the laser light scattering in sprays for two-color LIF thermometry measurements

et al. 2011

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Section: Introductionmentioning

confidence: 99%

Study of the droplet size effect coupled with the laser light scattering in sprays for two-color LIF thermometry measurements

et al. 2011

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“…Other techniques are based on the laser-induced fluorescence of a tracer dissolved in the liquid to be sprayed as the use of an exciplex (Murray and Melton 1985;Gossage and Melton 1987) or the use of two fluorescent tracers (Sakakibara et al 1997;Adrian 1999 andKim et al 2003).…”

Section: Introductionmentioning

confidence: 99%

New insight into two-color LIF thermometry applied to temperature measurements of droplets

et al. 2010

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To cite this version:Alexandre Labergue, Valérie Deprédurand, Alain Delconte, Guillaume Castanet, Fabrice Lemoine. New insight into two-color LIF thermometry applied to temperature measurements of droplets. Experiments in Fluids, Springer Verlag (Germany), 2010, 49 (2), pp.547 -556. <10.1007/s00348-010-0828-x>. New insight into two-color LIF thermometry applied to temperature measurements of dropletsAbstract When laser-induced fluorescence of droplets is used for measurements such as droplet temperature, a new dependence of the droplet size on the spectral distribution of fluorescence has been highlighted. The two-color laserinduced fluorescence technique applied to droplet temperature measurement requires a single fluorescent tracer and two spectral bands of detection for which the temperature sensitivity is different. Generally, the ratio of the intensities measured on each of the spectral bands of detection is assumed to be only temperature dependent. However, droplet dependence on diameter is also likely to influence the intensities ratio. This study provides some illustrations of the phenomenon, first on sprays with different mean statistical diameters and secondly on single droplets, for two temperature-sensitive fluorescent tracers in their solvents: sulforhodamine B dissolved in water and pyrromethene 597-8C9 dissolved in n-decane.

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“…[1][2][3] The measurement can be made externally to the region of interest and provides useful flexibility in defining the location of temperature measurement and in determining spatial variations in temperature within a region. This method has the advantage over physical probes of temperature (thermometers, thermocouples, etc.)…”

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confidence: 99%

Fluorescent Probes for Monitoring Temperature in Organic Solvents

1997

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We report two fluorophores, N-(1-pyrenylmethyl)-1-pyrenebutanamide and N-(1-pyrenylmethyl)-1-pyreneacetamide, that exhibit temperature-dependent emission spectra over the temperature range of 20-100°C. The fluorophores are readily synthesized via a one-pot process and can be used in dilute form (<1 µM) for measuring the temperature of various organic solvents nonintrusively. The fluorophores allow measurement of temperatures within a precision of (1°C and provide an internal reference signal that allows factors such as fluorophore concentration, optical path, and excitation light intensity to be ignored.Fluorescence-based temperature sensing is receiving increasing interest as it finds unique applications in monitoring the temperature within micro-sized domains (e.g., a biological cell) or hostile environments (e.g., a microwave-irradiated system). 1-3 The measurement can be made externally to the region of interest and provides useful flexibility in defining the location of temperature measurement and in determining spatial variations in temperature within a region. This method has the advantage over physical probes of temperature (thermometers, thermocouples, etc.) for fluid systems and systems under electromagnetic irradiation in that flow patterns and field lines are not disturbed by the presence of these molecular probes.A number of fluorescence-based optical thermometers have relied on changes in the intensity or wavelength of the fluorescence maximum. Limitations of these systems include the inherent fluctuations in the intensity of the excitation source and observed shifts in wavelength on the order of <0.1 nm/°C. 3,4 Strategies incorporating two fluorescent moieties within one molecule have provided an internal reference source that obviates factors that would affect measurements based on the intensity of a single emission process. Among this class of molecular probes, those containing two pyrenyl units offer high quantum yield and good sensitivity. Limitations for these fluorophores include difficulties associated with their multistep syntheses 5 and their restricted temperature range of operation. Presently, fluorophores of this type have been reported only for measuring temperatures in organic solvents above ∼110°C and below ∼20°C. 2,6,7 Here we describe the synthesis and characterization of a series of easily prepared bipyrenyl fluorophores that are suitable for fluorescence thermometry over the temperature range of 20-100°C, i.e., from room temperature to the boiling point of most common organic solvents.

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Fluorescence thermometers using intramolecular exciplexes

Cited by 48 publications

References 4 publications

Study of the droplet size effect coupled with the laser light scattering in sprays for two-color LIF thermometry measurements

Study of the droplet size effect coupled with the laser light scattering in sprays for two-color LIF thermometry measurements

New insight into two-color LIF thermometry applied to temperature measurements of droplets

Fluorescent Probes for Monitoring Temperature in Organic Solvents

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