New luminescent quantum counter systems based on a transition-metal complex

Mandal, Krishnagopal; Pearson, T. D. L.; Demas, J. N.

doi:10.1021/ic50217a031

Cited by 20 publications

(8 citation statements)

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“…Further, they have found that the complexes are quenched by oxygen to yield singlet oxygen both in homogeneous media and when immobilized on polymers (15,16). Such systems show promise as luminescence quantum counters (17) or as singlet oxygen generators (15,16) for synthesis. We have examined these complexes to determine whether, when immobilized in an appropriate substrate, they would be useful as monitors of oxygen concentration by means of luminescence quenching.…”

Section: (Lb)mentioning

confidence: 99%

Determination of oxygen concentrations by luminescence quenching of a polymer-immobilized transition-metal complex

Bacon¹,

Demas²

1987

Anal. Chem.

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Oxygen quenching of the luminescence of the trls(4,7-dl-phenyP 1,10-phensnthrollne )ruthenlum( 11) perchlorate Immobilized In a silicone rubber Is shown to be an accurate and precise method for measuring oxygen concentrations In solutions and In the gas phase. Quenching can be quantitated by either lifetime or Intensity quenching measurements. Aqueous strong acids, bases, complexlng agents, oxidants, and reducíante do not penetrate the hydrophobic polymer and, therefore, do not affect the response. Gaseous Interference, such as H2S, anesthetic gases (e.g., N20, halothane), and fluorocarbons do not affect the response. Chlorine and especially S02 are strong, but fully reversible, Interferents. A system was developed with a response time of less than 0.2 s, which Is adequate for the monitoring of breathing subjects.

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Section: (Lb)mentioning

confidence: 99%

Determination of oxygen concentrations by luminescence quenching of a polymer-immobilized transition-metal complex

Bacon¹,

Demas²

1987

Anal. Chem.

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383

246

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“…Stern-Volmer quenching plots for [Ru(Ph 2 phen) 3 ] 2+ ; (Ph 2 phen) = 4, 7-diphenyl-1, 10-phenanthroline; in silicone rubber show it to be a particularly good oxygen sensor and it is now widely used in commercial systems [24,25,26,27]. [Ru(bpy) 3 ] 2+ ; bpy = 2,2' -bipyridine; can be used as a luminescence quantum counter for measuring the relative intensities of light of different wavelengths [28]. [Ru(bpy) 3 ] 2+ in a polyvinyl alcohol (PVA) film has a flatter spectral response from 360 nm to 530 nm than the commonly used methanol Rhodamine B quantum counter solution.…”

Section: James Demas-university Of Virginiamentioning

confidence: 99%

Conference Report: NIST WORKSHOP ON LUMINESCENCE STANDARDS FOR CHEMICAL ANALYSIS, Gaithersburg, MD, September 8-9, 1999

DeRose¹

2000

J. Res. Natl. Inst. Stand. Technol.

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“…' + in a polymer support has nearly perfect quantum-counter properties [28]. The spectral range is somewhat limited, but other platinum-metal complexes can improve this range.…”

Section: Luminescent Quantum Countersmentioning

confidence: 99%

Interactions of Transition-Metal-Complex Photosensitizers with Polymers and Organized Media

Demas¹,

DeGraff²

1988

Journal of Macromolecular Science: Part A - Chemistry

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The interactions of luminescent platinum metal complexes with a variety of organized media, including micelles, cyclodextrins, and solid polymers, are described. In particular, Ru(IJ), Os(II), and Re(1) complexes with a-diimine ligands are discussed. Applications of these systems, including luminescence quantum counters, singlet oxygen generators, and a lumines. cent oxygen sensor, are described. Useful tools for studying these systems are described; these include a deuterium isotope method for measuring the degree of solvent exposure of bound sensitizers, excited-state-lifetime titrations for examining the compositions of systems, and spectral fitting and temperature profiles for probing excited state ordering and energies.

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New luminescent quantum counter systems based on a transition-metal complex

Cited by 20 publications

References 0 publications

Determination of oxygen concentrations by luminescence quenching of a polymer-immobilized transition-metal complex

Determination of oxygen concentrations by luminescence quenching of a polymer-immobilized transition-metal complex

Conference Report: NIST WORKSHOP ON LUMINESCENCE STANDARDS FOR CHEMICAL ANALYSIS, Gaithersburg, MD, September 8-9, 1999

Interactions of Transition-Metal-Complex Photosensitizers with Polymers and Organized Media

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