Sensitized Near-Infrared Emission from Nd3+ and Er3+ Complexes of Fluorescein-Bearing Calix[4]arene Cages

Wolbers, M.P. Oude; Veggel, Frank C. J. M. van; Peters, Frank; Beelen, Eric S. E. van; Hofstraat, Johannes W.; Geurts, Frank A. J.; Reinhoudt, David N.

doi:10.1002/(sici)1521-3765(19980515)4:5<772::aid-chem772>3.3.co;2-v

Cited by 35 publications

(46 citation statements)

References 12 publications

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“…FIAs could be based on this approach. Data on luminescence properties of Tb 3+ and Eu 3+ [181][182][183][184][185][186][187][188][189][190][191][192][193] and also other lanthanides [194][195][196][197][198][199]with quantum yields of up to 30% show that the design of the functional group acting as molecular 'antenna' to absorb the energy is very important.…”

Section: Other Heavy Metal Ion Recognitionmentioning

confidence: 99%

Calixarene-Based Molecules for Cation Recognition

Ludwig

Dzung

2002

Sensors

168

103

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Section: Other Heavy Metal Ion Recognitionmentioning

confidence: 99%

Calixarene-Based Molecules for Cation Recognition

Ludwig

Dzung

2002

Sensors

168

103

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“…FT-IR spectra of Er(III) carboxylate complexes showed two characteristic bands in the region of 1650-1604 and 1418-1395 cm −1 (see Figure 1). Here, for the first time to our knowledge, the first inert, saturated 8-coordinated Er(III)-chelated complexes of Er(benzoate) 3 (bipyridine) H5-8 and Er(pentafluorobenzoate) 3 (bipyridine) F5-8 were investigated. It is also very important for the formation of inert, saturated erbium complexes to get a higher near IR emission (see below).…”

Section: Resultsmentioning

confidence: 99%

“…After 2 days of stirring at room temperature, the resulting solution was filtered and removed solvents to give a white solid. The solid was sequentially washed with methanol, n-hexane and diethylether, and then dried to afford Er(benzoate) 3 from the sample was collected and refocused to the emission monochromator with 300 mm focal length. Visible emission spectra were taken with a PMT system (Hamamatsu R955) and near infrared emission spectra were taken with liquid nitrogen cooled Ge-detector (Edinburgh EI-L).…”

Section: Synthesis Of [Er(benzoate) 3 (Bipyridine)] (H5-8)mentioning

confidence: 99%

“…Therefore, in order to enhance the amplified luminescence intensity, the development of luminescent lanthanide complexes based on the energy transfer mechanisms by using the supramolecular ligands has been extensively studied. [2][3][4][5][6][7] Luminescent lanthanide complexes consist of a lanthanide ion as a photonic active component and its chelating luminescent ligands as sensitizers, which can transfer excitation energy from the ligands to the lanthanide ion. However, luminescent lanthanide complexes were not developed in specific reference to advanced photonic materials by now.…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, therefore, we report the synthesis of novel Er(III)-chelated complexes through the ligand-exchange reaction and the investigation of important key parameters for near infrared (IR) emission enhancement. 3 ] (5H-6). To the dried Schlenk flask, a mixture of benzoic acid (0.500 g, 4.094 mmol) and KH (0.164 g, 4.094 mmol) in THF (100 mL) was added and stirred at room temperature for overnight.…”

Section: Introductionmentioning

confidence: 99%

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Er(III)-chelated Prototype Complexes Based on Benzoate and Pentafluorobenzoate Ligands : Synthesis and Key Parameters for Near IR Emission Enhancement

Roh¹,

Oh²,

Nah³

et al. 2004

Bulletin of the Korean Chemical Society

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New synthetic methodology of the saturated and unsaturated Er(III)-chelated prototype complexes based on benzoate and pentafluorobenzoate ligands was developed through ligand-exchange reaction. The saturated 8-coordinated Er(III) complexes exhibit stronger near-IR emission than those of the unsaturated 6-coordinated Er(III) complexes, obtained from the direct photoexcitation of Er ions with 488 nm. Three H 2 O molecules coordinated in the unsaturated 6-coordinated complexes seriously quenched the near IR emission by the harmonic vibration relaxation decay of O-H bonds. Also, the stronger emission of the Er(III) complexes was obtained by the indirect photoexcitation of ligands than by the direct photoexcitation of the Er(III) ions, due to the energy transfer between the excited ligand and the erbium ion. Furthermore, the saturated Er(III)-chelated complex with C-F bonds shows much stronger near IR emission than that of the saturated Er(III)-chelated complex with C-H bonds. It is attributed to the influence of C-F bonds on near IR emission.

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Near-Infrared and Visible Luminescence from Terphenyl-Based Lanthanide(III) Complexes Bearing Amido and Sulfonamido Pendant Arms

et al. 2000

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A series of m‐terphenyl‐based ligands bearing three coordinating oxyacetate and two amido or two sulfonamido groups, (1a‐b)H3 and (2)H3, respectively, have been synthesized and characterized. The structures of the corresponding neutral complexes have been studied using 1H‐NMR spectroscopy and luminescence experiments. The photophysical properties of the (1a‐b)Eu, (2)Eu, (1a)Tb, and (2)Tb complexes have been studied to determine the structure of the first coordination sphere in methanol. The first coordination sphere consists of eight donor atoms provided by the ligand (three chelating oxyacetate groups and two amide or sulfonamide oxygens), and one methanol molecule. The (1a)Dy and (1a)Sm complexes exhibited sensitized luminescence in the visible spectral region, but the luminescence intensity was very sensitive to quenching by C‐H groups. The near‐infrared emitting (1a)Ln and (2)Ln complexes exhibited sensitized luminescence at wavelengths (at 880, 1060, and 1330 nm for Nd3+, at 980 nm for Yb3+, and at 1550 nm for Er3+) of interest for applications in optical telecommunication devices. The luminescence lifetimes of these complexes in DMSO and [D6]DMSO are in the range of microseconds. The luminescent state of the NIR emitting lanthanide ions is very efficiently quenched by high frequency oscillators (such as C‐H groups) in the solvent and the ligand.

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Sensitized Near-Infrared Emission from Nd3+ and Er3+ Complexes of Fluorescein-Bearing Calix[4]arene Cages

Cited by 35 publications

References 12 publications

Calixarene-Based Molecules for Cation Recognition

Calixarene-Based Molecules for Cation Recognition

Er(III)-chelated Prototype Complexes Based on Benzoate and Pentafluorobenzoate Ligands : Synthesis and Key Parameters for Near IR Emission Enhancement

Near-Infrared and Visible Luminescence from Terphenyl-Based Lanthanide(III) Complexes Bearing Amido and Sulfonamido Pendant Arms

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