Determination of absolute fluorescence quantum efficiency of quinine bisulfate in aqueous medium by optoacoustic spectrometry

Adams, M. J.; Highfield, James; Kirkbright, G. F.

doi:10.1021/ac50020a053

Cited by 162 publications

(65 citation statements)

References 21 publications

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“…PL spectra were obtained using a Hitachi F4500 luminescence spectrometer. The quantum yields of the hosts in various solvents were determined using quinine sulfate (quantum yield: 0.53 AE 0.02 (in 0.1 N H 2 SO 4 )) [54] as the fluorescence standard. Sample concentrations for quantum yield measurements were set at 5 Â 10 À6 M to eliminate self-absorption and quenching effects.…”

Section: Methodsmentioning

confidence: 99%

A Bipolar Host Material Containing Triphenylamine and Diphenylphosphoryl‐Substituted Fluorene Units for Highly Efficient Blue Electrophosphorescence

Hsu

Chien

Shu

et al. 2009

Adv Funct Materials

197

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Highly efficient blue electrophosphorescent organic light‐emitting diodes incorporating a bipolar host, 2,7‐bis(diphenylphosphoryl)‐9‐[4‐(N,N‐diphenylamino)phenyl]‐9‐phenylfluorene (POAPF), doped with a conventional blue triplet emitter, iridium(III) bis[(4,6‐difluoro‐phenyl)pyridinato‐N,C2´]picolinate (FIrpic) are fabricated. The molecular architecture of POAPF features an electron‐donating (p‐type) triphenylamine group and an electron‐accepting (n‐type) 2,7‐bis(diphenyl‐phosphoryl)fluorene segment linked through the sp3‐hybridized C9 position of the fluorene unit. The lack of conjugation between these p‐ and n‐type groups endows POAPF with a triplet energy gap (ET) of 2.75 eV, which is sufficiently high to confine the triplet excitons on the blue‐emitting guest. In addition, the built‐in bipolar functionality facilitates both electron and hole injection. As a result, a POAPF‐based device doped with 7 wt% FIrpic exhibits a very low turn‐on voltage (2.5 V) and high electroluminescence efficiencies (20.6% and 36.7 lm W−1). Even at the practical brightnesses of 100 and 1000 cd m−2, the efficiencies remain high (20.2%/33.8 lm W−1 and 18.8%/24.3 lm W−1, respectively), making POAPF a promising material for use in low‐power‐consumption devices for next‐generation flat‐panel displays and light sources.

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Section: Methodsmentioning

confidence: 99%

A Bipolar Host Material Containing Triphenylamine and Diphenylphosphoryl‐Substituted Fluorene Units for Highly Efficient Blue Electrophosphorescence

Hsu

Chien

Shu

et al. 2009

Adv Funct Materials

197

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“…One photon emission quantum yields (F) and 2PA cross section (s 2 ) were obtained by comparative measurement using coumarin 480 in methanol as in reference [16]. The quantum yield of coumarin 480 in methanol was determined by the fluorescence standard, quinine sulfate, which the quantum yield was assumed to be 0.53 AE 0.02 (in 0.1 M H 2 SO 4 ) [37]. One photon emission quantum yield of coumarin 480 in methanol was determined to be 0.87 AE 0.04.…”

Section: Methodsmentioning

confidence: 99%

A New Series of Quadrupolar Type Two‐Photon Absorption Chromophores Bearing 11, 12‐Dibutoxydibenzo[a,c]‐phenazine Bridged Amines; Their Applications in Two‐Photon Fluorescence Imaging and Two‐Photon Photodynamic Therapy

Velusamy

Shen

Lin

et al. 2009

Adv Funct Materials

131

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A new series of quadrupolar type two‐photon absorption (2PA) chromophores 3–9 bearing a core arylamine‐[a,c]phenazine‐arylamine motif are synthesized in high yields. Palladium‐catalyzed Stille coupling and CN coupling reactions are utilized to prepare target chromophores. Detailed characterization and systematic studies of these molecules, including absorption and fluorescence emission, are conducted. These compounds are found to exhibit very large 2PA cross section values, for example, ∼7000 GM at 800 nm for 8 in toluene. Two‐photon‐induced fluorescence imaging is successfully demonstrated in vitro using compound‐8‐encapsulated silica nanoparticles with excellent bio‐compatibility. In combination with the capability of both one‐ and two‐photon singlet‐oxygen sensitizations, this nanocomposite demonstrates its promising potential in dual functionality toward two‐photon fluorescence imaging and two‐photon photodynamic therapy.

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“…These authors claim that the correct value is significantly higher: Φ f = 0.60 at 10 -5 M. At 10 times lower acid concentration, the QY as well as the decay time of QS are somewhat smaller [10,13]. Clearly, care should be taken to avoid chloride ions [11], and the long lifetime might make QS sensitive to other quenchers. Oxygen, however, seems to be unimportant in this respect.…”

Section: A Small Set Of Well-established Standardsmentioning

confidence: 98%

Standards for Photoluminescence Quantum Yield Measurements in Solution

Brouwer

2016

IUPAC Standards Online

153

178

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Link to publication Citation for published version (APA):Brouwer, A. M. (2011). Standards for photoluminescence quantum yield measurements in solution. Pure and Applied Chemistry, 83(12), 2213-2228. DOI: 10.1351/PAC-REP-10-09-31 General rightsIt is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. Abstract: The use of standards for the measurement of photoluminescence quantum yields (QYs) in dilute solutions is reviewed. Only three standards can be considered well established. Another group of six standards has been investigated by several independent researchers. A large group of standards is frequently used in recent literature, but the validity of these is less certain. The needs for future development comprise: (i) confirmation of the validity of the QY values of many commonly used standard materials, preferably in the form of SI traceable standards; (ii) extension of the set of standard materials to the UV and near-IR spectral ranges; and (iii) good standards or robust protocols for the measurements of low QYs.

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Determination of absolute fluorescence quantum efficiency of quinine bisulfate in aqueous medium by optoacoustic spectrometry

Cited by 162 publications

References 21 publications

A Bipolar Host Material Containing Triphenylamine and Diphenylphosphoryl‐Substituted Fluorene Units for Highly Efficient Blue Electrophosphorescence

A Bipolar Host Material Containing Triphenylamine and Diphenylphosphoryl‐Substituted Fluorene Units for Highly Efficient Blue Electrophosphorescence

A New Series of Quadrupolar Type Two‐Photon Absorption Chromophores Bearing 11, 12‐Dibutoxydibenzo[a,c]‐phenazine Bridged Amines; Their Applications in Two‐Photon Fluorescence Imaging and Two‐Photon Photodynamic Therapy

Standards for Photoluminescence Quantum Yield Measurements in Solution

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