Transition metal complexes as a new class of photosensitizers for near-infrared lanthanide luminescence

Klink, Stephen I.; Keizer, Henk; Hofstraat, Hans; Veggel, Frank C. J. M. van

doi:10.1016/s0379-6779(01)00625-7

Cited by 36 publications

(10 citation statements)

References 21 publications

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“…An example of the throughspace strategy is shown in Scheme 8 for a trimetallic RuLn 2 in which the d-and f-transition metal ions are not directly linked by an electronic relay. 153 The latter intermetallic through-space communication is relevant to standard d A f sensitization (or f A d relaxation) programmed in doped ionic crystals for optimizing optical responses. 38,154 Such strategy has been already mentioned when discussing quantum cutting (section 1.1), 21 and it has been recently extended for improving the efficiency of nonlinear up-conversion processes.…”

Section: Controlling Luminescent Properties In Multimetallic Assembliesmentioning

confidence: 99%

Taking advantage of luminescent lanthanide ions

2005

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Lanthanide ions possess fascinating optical properties and their discovery, first industrial uses and present high technological applications are largely governed by their interaction with light. Lighting devices (economical luminescent lamps, light emitting diodes), television and computer displays, optical fibres, optical amplifiers, lasers, as well as responsive luminescent stains for biomedical analysis, medical diagnosis, and cell imaging rely heavily on lanthanide ions. This critical review has been tailored for a broad audience of chemists, biochemists and materials scientists; the basics of lanthanide photophysics are highlighted together with the synthetic strategies used to insert these ions into mono- and polymetallic molecular edifices. Recent advances in NIR-emitting materials, including liquid crystals, and in the control of luminescent properties in polymetallic assemblies are also presented. (210 references.).

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Section: Controlling Luminescent Properties In Multimetallic Assembliesmentioning

confidence: 99%

Taking advantage of luminescent lanthanide ions

2005

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“…[72][73][74][75][76][77] Fluorescein, erythrosine, eosin, triphenylene, dansyl, lissamine, coumarin, ferrocene, Ru(bipyridine) 3 , and a Pt(II) complex also sensitize Nd 3ϩ and Yb 3ϩ . 72,73,76,78 The emission spectra of Fig. 23.…”

Section: B Sensitized Emission Of Er 3ϩ and Other Lanthanides In Chrmentioning

confidence: 99%

Broadband sensitizers for erbium-doped planar optical amplifiers: review

2004

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Three different broadband sensitization concepts for optically active erbium ions are reviewed: 1) silicon nanocrystals, with absorption over the full visible spectrum, efficiently couple their excitonic energy to Er 3ϩ , 2) silver-related defect states in sodalime silicate glass have absorption in the blue and transfer energy to Er 3ϩ , and 3) organic cage complexes coordinated with well-chosen chromophores serve as broadband sensitizers in the visible. Energy transfer rates, efficiencies, and limiting factors are addressed for each of these sensitizers. Implications of the use of strong sensitizers for planar waveguide design are illustrated by using a model for the sensitizing effect of ytterbium.

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“…28 In Table III, calculated values of b R for Nd(TTA) 3 Dpbt are obtained from Eq. (8). From the triangle rule |J À J9| , k , |J + J9|, the values of kU 2 k 2 are zero for all these transitions; thus, the theoretical b R of 4 F 3/2 is not concerned with parameter X 2 .…”

Section: Radiative Properties Of Nd(tta) 3 Dpbt-doped Pmmamentioning

confidence: 96%

“…Up to date, NIR emitting complexes with various chromophores such as fluorescein, lissamine, porphyrins, ferrocene, and metal complexes have been reported. [5][6][7][8][9] In addition, as dopants in polymer waveguide for laser and optical amplifiers, rare earth b-diketonate complexes exhibit good stability and compatibility, and the doping concentration can be up to a magnitude of 3% by weight without aggregate. 10 So, based on these considerations, in this work, a new visible-light-sensitized Nd complex was synthesized by using 2-(N,N-diethylanilin-4-yl)-4,6-bis (3,5-dimethylpyrazol-1-yl)-1,3,5-triazine (Dpbt) as synergetic ligand and thenoyltrifluoroacetonate (TTA) as the first ligand, as shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

NIR luminescence of a visible-light-sensitized neodymium complex with large experimental fluorescence branching ratio for ⁴F_3/2→⁴I_11/2 in PMMA

Wang

Luo

et al. 2011

J. Mater. Res.

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In this work, a visible-light-sensitized neodymium complex with 2-(N,N-diethylanilin-4-yl)-4,6-bis (3,5-dimethylpyrazol-1-yl)-1,3,5-triazine (Dpbt) as a synergetic ligand is synthesized and incorporated into poly(methyl methacrylate) (PMMA). Absorption and luminescent spectra of Nd(TTA) 3 Dpbt (TTA 5 thenoyltrifluoroacetonate) in PMMA are measured and compared with common complex Nd(TTA) 3 Phen (Phen 5 1,10-phenanthroline). As a result, Nd(TTA) 3 Dpbt has relatively high luminescent intensity and wide excited spectral range, attributed to the sensitization of the ligand Dpbt. Judd-Ofelt analysis is used, and Judd-Ofelt parameters are calculated (X 2 5 33.72 Â 10 À20 cm 2 , X 4 5 11.52 Â 10 À20 cm 2 , and X 6 5 6.81 Â 10 À20 cm 2 ). The radiative properties are predicted and compared with other different Nd complexes. The stimulated emission cross-section of 4 F 3/2 / 4 I 11/2 transition is 3.02 Â 10 À20 cm 2 and the estimated lifetime is 506 ls using the Judd-Ofelt parameters. Experimental fluorescence branching ratio of this transition is quite high for Nd ions. The radiative properties' investigation for 4 F 3/2 / 4 I 11/2 transition indicates that it is possible to be a laser transition.

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Transition metal complexes as a new class of photosensitizers for near-infrared lanthanide luminescence

Cited by 36 publications

References 21 publications

Taking advantage of luminescent lanthanide ions

Taking advantage of luminescent lanthanide ions

Broadband sensitizers for erbium-doped planar optical amplifiers: review

NIR luminescence of a visible-light-sensitized neodymium complex with large experimental fluorescence branching ratio for ⁴F_3/2→⁴I_11/2 in PMMA

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Transition metal complexes as a new class of photosensitizers for near-infrared lanthanide luminescence

Cited by 36 publications

References 21 publications

Taking advantage of luminescent lanthanide ions

Taking advantage of luminescent lanthanide ions

Broadband sensitizers for erbium-doped planar optical amplifiers: review

NIR luminescence of a visible-light-sensitized neodymium complex with large experimental fluorescence branching ratio for 4F3/2→4I11/2 in PMMA

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Product

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NIR luminescence of a visible-light-sensitized neodymium complex with large experimental fluorescence branching ratio for ⁴F_3/2→⁴I_11/2 in PMMA