Measurement of photoluminescence quantum yields. Review

Crosby, G. A.; Demas, J. N.

doi:10.1021/j100678a001

Cited by 4,610 publications

(945 citation statements)

References 20 publications

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“…For L 1 , the emission spectrum consisted of a very weak band, displaying significant vibrational structure, with a maximum at ca. 335 nm and a quantum yield of 0.047 ((5%) as determined by the optically dilute method 24 with reference to the parent naphthalene chromophore (Φ F ) 0.42). 25 Also evident in the emission spectrum of L 1 was a broad featureless band to lower energy centered at ca.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Tuning the Photophysical Behavior of Luminescent Cyclam Derivatives by Cation Binding and Excited State Redox Potential

et al. 2005

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The emission from two photoactive 14-membered macrocyclic ligands, 6-((naphthalen-1-ylmethyl)-amino) trans-6,13-dimethyl-13-amino-1,4,8,11-tetraaza-cyclotetradecane (L 1 ) and 6-((anthracen-9-ylmethyl)-amino)-trans-6, 13-dimethyl-13-amino-1,4,8,11-tetraaza-cyclotetradecane (L 2 ) is strongly quenched by a photoinduced electron transfer (PET) mechanism involving amine lone pairs as electron donors. Time-correlated single photon counting (TCSPC), multiplex transient grating (TG), and fluorescence upconversion (FU) measurements were performed to characterize this quenching mechanism. Upon complexation with the redox inactive metal ion, Zn(II), the emission of the ligands is dramatically altered, with a significant increase in the fluorescence quantum yields due to coordination-induced deactivation of the macrocyclic amine lone pair electron donors. For [ZnL 2 ] 2+ , the substituted exocyclic amine nitrogen, which is not coordinated to the metal ion, does not quench the fluorescence due to an inductive effect of the proximal divalent metal ion that raises the ionization potential. However, for [ZnL 1 ] 2+ , the naphthalene chromophore is a sufficiently strong excited-state oxidant for PET quenching to occur.

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Section: Methodsmentioning

confidence: 99%

“…The fluorescence quantum yield was determined to be 0.006 ((5%) by comparison to the parent chromophore. 24 As with the naphthyl system, the [ Time-Resolved Photophysics. Time-resolved fluorescence decay profiles for L 1 and L 2 were measured by the TCSPC technique in CH 3 CN solution.…”

Section: Methodsmentioning

confidence: 99%

Tuning the Photophysical Behavior of Luminescent Cyclam Derivatives by Cation Binding and Excited State Redox Potential

et al. 2005

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“…Quinine sulfate in 1.0 N sulfuric acid was used as the reference (Φ r = 0.546). 36 Luminescence lifetimes were determined with a HORIBA Jobin Yvon IBH FluoroLog-3 spectrofluorimeter, adapted for time resolved measurements. A sub-microsecond Xenon flash lamp (Jobin Yvon, 5000XeF) was used as the light source, coupled to a double grating excitation monochromator for spectral selection.…”

Section: Photophysicsmentioning

confidence: 99%

Highly Luminescent Lanthanide Complexes of 1-Hydroxy-2-pyridinones

et al. 2008

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The synthesis, X-ray structure, stability, and photophysical properties of several trivalent lanthanide complexes formed from two differing bis-bidentate ligands incorporating either alkyl or alkyl ether linkages and featuring the 1-hydroxy-2-pyridinone (1,2-HOPO) chelate group in complex with Eu(III), Sm(III) and Gd(III) are reported. The Eu(III) complexes are among some of the best examples, pairing highly efficient emission ( Eu tot Φ ~ 21.5 %,) with high stability (pEu ~ 18.6) in aqueous solution, and are excellent candidates for use in biological assays. A comparison of the observed behavior of the complexes with differing backbone linkages shows remarkable similarities, both in stability and photophysical properties. Low temperature photophysical measurements for a Gd(III) complex were also used to gain insight into the electronic structure, and were found to agree with corresponding TD-DFT calculations for a model complex. A comparison of the high resolution Eu(III) emission spectra in solution and from single crystals also revealed a more symmetric coordination geometry about the metal ion in solution due to dynamic rotation of the observed solid state structure.

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“…The Tb(III) complexes (10M) were prepared in situ in 0.1M Tris buffered H 2 O (pH 7.4) with 0.2% DMSO. Quantum yields were determined by the optically dilute method 49 reproduce experimental ligand triplet energies within ~5%. Together, the experimental and computational results serve as a predictive tool that can be used to guide antenna ligand design.…”

Section: -(Benzyloxy)-5-methoxy-n-methyl-3-(2-thioxothiazolidine-3-cmentioning

confidence: 99%

Predicting Efficient Antenna Ligands for Tb(III) Emission

Samuel

Raymond

2008

Inorg. Chem.

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ABSTRACT:A series of highly luminescent Tb(III) complexes of para-substituted 2-hydroxyisophthalamide ligands (5LI-IAM-X) has been prepared (X = H, CH 3 , (C=O)NHCH 3 , SO 3 -, NO 2 , OCH 3 , F, Cl, Br) to probe the effect of substituting the isophthalamide ring on ligand and Tb(III) emission in order to establish a method for predicting the effects of chromophore modification on Tb(III) luminescence. The energies of the ligand singlet and triplet excited states are found to increase linearly with the -withdrawing ability of the substituent. The experimental results are supported by 2 time-dependent density functional theory (TD-DFT) calculations performed on model systems, which predict ligand singlet and triplet energies within ~5% of the experimental values. The quantum yield () values of the Tb(III) complex increases with the triplet energy of the ligand, which is in part due to the decreased non-radiative deactivation caused by thermal repopulation of the triplet. Together, the experimental and theoretical results serve as a predictive tool that can be used to guide the synthesis of ligands used to sensitize lanthanide luminescence.

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Measurement of photoluminescence quantum yields. Review

Cited by 4,610 publications

References 20 publications

Tuning the Photophysical Behavior of Luminescent Cyclam Derivatives by Cation Binding and Excited State Redox Potential

Tuning the Photophysical Behavior of Luminescent Cyclam Derivatives by Cation Binding and Excited State Redox Potential

Highly Luminescent Lanthanide Complexes of 1-Hydroxy-2-pyridinones

Predicting Efficient Antenna Ligands for Tb(III) Emission

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