Crystal disorder and triboluminescence: triethylammonium tetrakis(dibenzoylmethanato)europate

Sweeting, Linda M.; Rheingold, Arnold L.

doi:10.1021/ja00243a017

Cited by 131 publications

(83 citation statements)

References 2 publications

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“…Such correlation rule has also been applied to the assignment of the absolute configurations of the six-or seven-coordinate chiral tri(β-diketone) complexes. As far as we know, however, most of the eight-coordinate tetra(β-diketone) lanthanide complexes are achiral [19][20][21][22][23] and the reports of the solid state CD spectra of eight-coordinate chiral lanthanide complexes with β-diketone ligands are rather limited. In this work, [Eu(dbm) 3 L RR ] [24] (1), [Eu(dbm) 3 L SS ] [24] (2) and [Tb(dbm) 3 L RR ] [25] (3) were chosen tactfully to obtain a rule for correlation of the CD spectra with absolute configurations of eight-coordinate chiral lanthanide complexes in the solid state, in which the complexes 1 and 2 ( Figure 2) were synthesized stereoselectively by Song et al [24] .…”

Section: Introductionmentioning

confidence: 99%

Stereochemistry and solid-state circular dichroism spectroscopy of eight-coordinate chiral lanthanide complexes

Zhou

Wan

Zhao

et al. 2009

Sci. China Ser. B-Chem.

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Eight-coordinate chiral lanthanide complexes [Eu(dbM)(3)L-RR] (1), [Eu(dbM)(3)L-SS (2) and [Tb(dbm)(3)L-RR] (3) (L-RR/L-SS= (-)-/(+)-4,5-pineno-2,2'-bipyridine, Hdbm = dibenzoylmethane) were synthesized stereoselectively, which were characterized by UV-vis, CD spectra and X-ray single-crystal diffraction. The mirror-image structure features of complexes 1 and 2 were obtained by combination of the solid-state CD spectra and the crystal structure analysis. After further comparison with the solid-state CID spectra of six-coordinate and seven-coordinate metal complexes containing beta-diketone ligands, the CD spectra-absolute configuration correlation rule for the eight-coordinate beta-diketonate lanthanide complexes was proposed through the exciton chirality method for the first time. The Delta or Lambda absolute configurations of complexes 1 - 3 with the distorted square antiprism geometry were confirmed by the X-ray single-crystal analysis.National Natural Science Foundation of China [20773098, 20973136]; Innovation Foundation of Xiamen University (Series 2) [XDKJCX20061027

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Section: Introductionmentioning

confidence: 99%

Stereochemistry and solid-state circular dichroism spectroscopy of eight-coordinate chiral lanthanide complexes

Zhou

Wan

Zhao

et al. 2009

Sci. China Ser. B-Chem.

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“…Triethylammonium tetrakis(dibenzoyl methanato)-europ(III)ate [9,15] [NHEt 3 Eu(dbm) 4 ] and Mn 0.05 Zn 0.95 S [9,16] (ZnS:Mn), two highly triboluminescent materials, were used in this work (see Figure 1). The stimulation of triboluminescence in these materials is different: ZnS:Mn emits light during a reversible deformation of the crystals whereas NHEt 3 Eu(dbm) 4 emits only during fracture of the crystals.…”

Section: Triboluminescent Materialsmentioning

confidence: 99%

“…Both substances were synthesized according to the literature. [15,16] NHEt 3 Eu(dbm) 4 was synthesized from EuCl 3 , dibenzoyl methane (dbm) and triethyl amine in ethanol to yield the crude complex. Fine yellow needles can be achieved by recrystallization from ethanol.…”

Section: Triboluminescent Materialsmentioning

confidence: 99%

Functional Diblock Copolymers for the Integration of Triboluminescent Materials into Polymer Matrices

Meuer

Zentel

2008

Macro Chemistry & Physics

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This work describes the synthesis and use of new diblock copolymers to integrate functional inorganic particles into a polymer matrix. These diblock copolymers were synthesized by nitroxide‐mediated polymerization (NMP) from styrene and two styrene‐like monomers with protected functional groups for the later connection to the functional inorganic material. It was possible to keep the polydispersity of the block copolymers around or below 1.2 and to preset the length of the functional block to about 20 monomers or 10 mol‐% of monomers. The groups for the surface functionalization (amino groups or chelating ligands) were obtained in their free form by polymer analogous reactions. As an example of functional inorganic materials, two highly triboluminescent materials were synthesized and investigated: an europium complex that is sensitive to fracture only and a manganese‐doped zinc sulfide that is also sensitive to reversible deformations. The interaction of the functional block copolymers with these triboluminescent crystals could be proved by (i) selective adsorption on surfaces coated with the block copolymer, (ii) by copolymer‐mediated transfer of the crystals from water to a chloroform phase and (iii) by the homogenous embedding of the crystals in a polystyrene (PS) matrix.

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“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] Owing to the fracture-induced light emission, triboluminescent materials have been investigated as sensor materials for monitoring structural damage in solid substrate. 16,17 Although the triboluminescent phenomenon is related to electric discharge, the exact light emission mechanism is still unknown.…”

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confidence: 99%

A New Triboluminescent Material

Park¹,

Lee²,

Park³

et al. 2011

Bulletin of the Korean Chemical Society

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Crystal disorder and triboluminescence: triethylammonium tetrakis(dibenzoylmethanato)europate

Cited by 131 publications

References 2 publications

Stereochemistry and solid-state circular dichroism spectroscopy of eight-coordinate chiral lanthanide complexes

Stereochemistry and solid-state circular dichroism spectroscopy of eight-coordinate chiral lanthanide complexes

Functional Diblock Copolymers for the Integration of Triboluminescent Materials into Polymer Matrices

A New Triboluminescent Material

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