Some new properties of calixarenes: the luminescence of four lanthanide ions in calixarene complexes

Shevchuk, S. V.; Alexeeva, Elena A.; Русакова, Н. В.; Korovin, Yurii V.; Bacherikov, Valerii A.; Gren, A. I.

doi:10.1070/mc1998v008n03abeh000932

Cited by 10 publications

(2 citation statements)

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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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“…The spectral luminescence of Ln() complexes (Ln = Nd, Eu, Tb and Yb) has been studied with phenolic-type calix [4]arenes. 8 The emission of Yb() has been studied in some complexes with different types of ligands such as diketonates, 9 porphyrins, 10 macrocyclic hydrazones 11 and tetraazacyclododecane (12-aneN 4 ) based ligands. 12 Horrocks and co-workers have recently described the sensitised emission of Yb() complexed in a protein by means of tryptophan moieties 13 and luminescence spectra of Nd() complexes have also been reported recently.…”

Section: Introductionmentioning

confidence: 99%

Mono- and bimetallic lanthanide(III) phenolic cryptates obtained by template reaction: solid state structure, photophysical properties and relaxivity †

Platas

Avecilla

Blas

et al. 2000

J. Chem. Soc., Dalton Trans.

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We report here a structural and photophysical study of lanthanide monometallic complexes with the macrobicyclic axial phenolic cryptandL as well as of bimetallic complexes with its de-protonated form (L Ϫ 3H) 3Ϫ . The X-ray crystal structure of [DyL(NO 3 )](NO 3 ) 2 ؒ2CH 3 CNؒ 0.5H 2 O shows the metal ion being asymmetrically positioned into the macrobicyclic cavity and bonded to seven donor atoms of L and two oxygen atoms of a bidentate nitrate ion. The X-ray crystal structure of the bimetallic cryptate, [Dy 2 (L Ϫ 3H)(NO 3 ) 2 ](NO 3 )ؒ3H 2 OؒMeOH, confirms that both Dy() ions are held into the cavity of the cryptand at a very short distance from each other, 3.4840(4) Å. High resolution laser-excited emission spectra of the crystalline monometallic Eu() cryptate point to the presence of a single site with low symmetry for the metal, while lifetime measurements in H 2 O and D 2 O solutions allowed us to estimate the number of bound water molecules, q = 1. Both mono-and binuclear Yb() cryptates display strong emission upon excitation through the ligand electronic levels, the spectrum of the binuclear complex being consistent with the presence of two Yb() ions in different co-ordination environments. Proton NMRD profiles for the mononuclear Gd() complex have been measured in the temperature range 5-37 ЊC and show that the relaxivity is mainly limited by fast rotation; this compound is stable towards acid-catalysed decomposition in aqueous solution only at pH > 5.5.

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