Ideality of pressure-sensitive paint. I. Platinum tetra(pentafluorophenyl)porphine in fluoroacrylic polymer

Puklin, Eileen; Carlson, Brenden; Gouin, Sébastien G.; Costin, Colin D.; Green, Edmond; Ponomarev, S. G.; Tanji, Haruko; Gouterman, Martin

doi:10.1002/1097-4628(20000923)77:13<2795::aid-app1>3.0.co;2-k

Cited by 123 publications

(47 citation statements)

References 13 publications

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“…The peak absorption wavelength of the PtTFPP luminophore is 390~395nm, however the lamp used in this test was 468nm. When PtTFPP is excited at its ideal wavelength its quantum yield is several times greater than when excited at higher wavelengths [18]. Further tests should be performed using PtTFPP and an excitation light source made of 395 nm LEDs to increase the signal to noise ratio of the PSP, helping to detect even smaller pressures.…”

Section: Resultsmentioning

confidence: 99%

Application of pressure-sensitive paint to low-speed flow around a U-bend of strong curvature

Quinn¹,

Gongora-Orozco²,

Kontis³

et al. 2013

Experimental Thermal and Fluid Science

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Two in-house Pressure-Sensitive Paint (PSP) formulations have been developed and tested in the low-speed regime on the flow around a U-bend of strong curvature. The two PSP formulations use trisBathophenanthroline Ruthenium Perchlorate (Ru (II)) and Platinum tretakis (pentafluorophenyl) Porphyrin (PtTFPP) as their photoactive molecules, incorporated in identical sol-gel matrices. Ru (II) emits a broad peak centered at 610nm while PtTFPP emits a much narrower peak at 650nm. The paints were illuminated using two in-house constructed blue LED lights with peak emission of 468nm. These luminophores have been tested with gauge inlet pressures of 3000 and 1250 Pa respectively. A further sample was tested with a gauge pressure of 500 Pa. In-situ calibration was utilized to minimize the temperature dependency change between wind-on and wind-off images. Both paints captured the flow characteristics and gave predictable surface pressure maps despite the challenges inherent with using such low pressures. Keywords: PSP, low-speed, U-bend, internal flow INTRODUCTIONSeveral researchers have attempted to use pressuresensitive paints (PSP) at low speeds despite the inherent difficulties with such applications [1,2,3,4,5,6,7]. Of these researchers Bell [3] and Le Sant [7] managed extremely low errors (± 50 Pa). However, all of the applications of PSP to low-speed flow have been performed in large-scale wind tunnels. To this end it was decided to test the PSP formulations in use at the University of Manchester on a low-speed, internal flow.

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Section: Resultsmentioning

confidence: 99%

Application of pressure-sensitive paint to low-speed flow around a U-bend of strong curvature

Quinn¹,

Gongora-Orozco²,

Kontis³

et al. 2013

Experimental Thermal and Fluid Science

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“…18(b), is frequently selected as the dye for PSP measurements. Absorption and emission spectra of PtTFPP in FIB [3] (data compiled from references [103] and [42])…”

Section: Metalloporphyrinmentioning

confidence: 99%

A review of pressure-sensitive paint for high-speed and unsteady aerodynamics

Gregory

Asai

Kameda

et al. 2008

Proceedings of the Institution of Mechanical Engineers, Part G:

343

176

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Abstract:The current paper describes the development of pressure-sensitive paint (PSP) technology as an advanced measurement technique for unsteady flow fields and short-duration wind tunnels. Newly developed paint formulations have step response times approaching 1 ms, making them suitable for a wide range of unsteady testing. Developments in binder technology are discussed, which have resulted in new binder formulations such as anodized aluminium, thin-layer chromatography plate, polymer/ceramic, and poly(TMSP) PSP. The current paper also details modeling work done to describe the gas diffusion properties within the paint binder and understand the limitations of the paint response characteristics. Various dynamic calibration techniques for PSP are discussed, along with summaries of typical response times. A review of unsteady and high-speed PSP applications is presented, including experiments with shock tubes, hypersonic tunnels, unsteady delta wing aerodynamics, fluidic oscillator flows, Hartmann tube oscillations, acoustics, and turbomachinery. Flowfields with fundamental frequencies as high as 21 kHz have been successfully measured with porous PSP formulations.

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“…A general disadvantage of these indicators is their rather low photostability. Platinum tetrakis(pentafuorophenyl)porphyrin (PtTFPP 32) has received much attention and mostly replaced PtOEP because it shows much less photodeterioration [186]. The higher photostability of 32 compared to 30 is explained by the electron-withdrawing character of the perfluorophenyl substituents which reduces the electron density on the porphyrin ring thus rendering the PtTFPP less reactive toward oxidation by singlet oxygen [134].…”

Section: Metalloporphyrinsmentioning

confidence: 99%

“…The higher photostability of 32 compared to 30 is explained by the electron-withdrawing character of the perfluorophenyl substituents which reduces the electron density on the porphyrin ring thus rendering the PtTFPP less reactive toward oxidation by singlet oxygen [134]. PtTFPP possesses similarly long decay time (60 μs) and acceptable brightness when excited in the visible rage; it has been widely used as oxygen indicator in different types of matrices such as polystyrene [5,134], fluoroacrylic polymer as a component of a pressure-sensitive paint [51,186], in sol-gel [44,45], poly(norobornene)s [213], and many other matrices. PtTFPP was also modified to be able to be polymerized and cross-linked with hydrophilic poly(2-hydroxyethyl methacrylate)-co-polyacrylamide or hydrophobic polystyrene to generate highly photostable and biocompatible sensing films [216].…”

Section: Metalloporphyrinsmentioning

confidence: 99%

Indicators for optical oxygen sensors

Borisov¹,

Quaranta²,

Klimant³

2012

Advances in Chemical Bioanalysis

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Continuous monitoring of oxygen concentration is of great importance in many different areas of research which range from medical applications to food packaging. In the last three decades, significant progress has been made in the field of optical sensing technology and this review will highlight the one inherent to the development of oxygen indicators. The first section outlines the bioanalytical fields in which optical oxygen sensors have been applied. The second section gives the reader a comprehensive summary of the existing oxygen indicators with a critical highlight on their photophysical and sensing properties. Altogether, this review is meant to give the potential user a guide to select the most suitable oxygen indicator for the particular application of interest.

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Ideality of pressure-sensitive paint. I. Platinum tetra(pentafluorophenyl)porphine in fluoroacrylic polymer

Cited by 123 publications

References 13 publications

Application of pressure-sensitive paint to low-speed flow around a U-bend of strong curvature

Application of pressure-sensitive paint to low-speed flow around a U-bend of strong curvature

A review of pressure-sensitive paint for high-speed and unsteady aerodynamics

Indicators for optical oxygen sensors

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