Lanthanide Luminescence Spectroscopy as a Monitor of Crystal Structure

1993 ◽  
Vol 47 (11) ◽  
pp. 1951-1952 ◽  
Author(s):  
N. A. Stump ◽  
G. Chen ◽  
R. G. Haire ◽  
J. R. Peterson
Keyword(s):  
Crystal Structure ◽  
Luminescence Spectroscopy ◽  
Lanthanide Luminescence

scholarly journals Crystal Structure and Optical Properties of a Homometallic Heterotrinuclear Europium(III) Complex – a Cationic Eu(III) ion Coordinated by two [Eu(III)DOTA]- Complexes

2021 ◽  
Author(s):  
Maria Storm Thomsen ◽  
Ander Østergård Madsen ◽  
Thomas Just Sørensen
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Coordination Number ◽  
Luminescence Spectroscopy ◽  
Data Sets ◽  
Complex Data ◽  
Triclinic Space Group ◽  
Coordination Environment ◽  
High Asymmetry ◽  
State Luminescence

The structure and solid state luminescence properties of a homometallic heterotrinuclear [Eu(μO)5(OH2)3][Eu(DOTA)(H2O)]2Cl crystal was determined and was found to have two sites: a free europium(III) ion and a [Eu(DOTA)(H2O)]- complex. The trinuclear compound crystallizes in a laminar structure in triclinic space group P. The crystal structure was determined using complex data treatment due to non-merohedric twinning. Experimental data sets were recorded with large redundancy and separated according to scattering domain in order to obtain a reliable structure, which revealed the configuration of the europium(III) sites. In first site, the europium(III) 1,4,7,10-tetrazacyclododecane-1,4,7,10-tetraacetate (Eu.DOTA) complex was found to adopt a capped twisted square antiprismatic (cTSAP) conformation, where a capping water molecule increased the coordination number of the europium(III) site to nine (CN = 9). In the second site, the cationic europium(III) ion was found to be coordinated by three water molecules and five oxy groups from neighboring [Eu(DOTA)(H2O)]- complexes. The coordination geometry of this site was found to be a compressed square antiprism (SAP), and the coordination number of the europium(III) ion was found to be eight (CN = 8). A large increase in rate constant of luminescence was observed for Eu(III) in [Eu(DOTA)(H2O)]- in solid state luminescence spectroscopy measurements compared to in solution, which lead to investigations of single-crystals in deuterated media to exclude additional effects of quenching. We conclude that the most probable cause of the decrease in observed luminescence lifetimes is the high asymmetry of the coordination environment of [Eu(DOTA)(D2O)]- in the [Eu(μO)5(OD2)3][Eu(DOTA)(D2O)]2Cl crystals<br>

Emitting-state properties of square-planar dithiocarbamate complexes of palladium(II) and platinum(II) probed by pressure-dependent luminescence spectroscopy

2009 ◽  
Vol 87 (11) ◽  
pp. 1625-1635 ◽  
Author(s):  
Caroline Genre ◽  
Geneviève Levasseur-Thériault ◽  
Christian Reber
Keyword(s):  
Crystal Structure ◽  
Luminescence Band ◽  
Room Temperature ◽  
External Pressure ◽  
Luminescence Spectroscopy ◽  
Luminescence Spectra ◽  
Square Planar ◽  
Temperature And Pressure ◽  
Monodentate Ligands ◽  
Crystalline Complexes Of

Temperature- and pressure-dependent Raman and luminescence spectra of four crystalline complexes of palladium(II) and platinum(II) with chelating diethyldithiocarbamate (EDTC) and pyrrolidine-N-dithiocarbamate (PDTC) ligands are reported. The crystal structure of [Pd(PDTC)2] was resolved at 120 K. Luminescence band maxima are observed at approximately 14 500 cm–1 and 16 000 cm–1 for the palladium(II) and platinum(II) complexes, respectively. Pressure leads to blue shifts of the band maxima by +9 and +13 cm–1/kbar for [Pd(EDTC)2] and [Pd(PDTC)2], and +15 cm–1/kbar for [Pt(EDTC)2]. These spin-forbidden d–d luminescence transitions have lifetimes of approximately 600 µs at temperatures below 20 K. Luminescence intensities at room temperature are low, but they increase significantly with external pressure. The experimental results show that strong increases of luminescence intensities caused by pressure are not limited to complexes with monodentate ligands, a result providing insight on the coordinates with emitting-state distortions responsible for this effect.

scholarly journals Revised crystal structure and luminescent properties of gadolinium oxyfluoride Gd4O3F6doped with Eu3+ions

2014 ◽  
Vol 43 (18) ◽  
pp. 6925-6934 ◽  
Author(s):  
Tomasz Grzyb ◽  
Rafal J. Wiglusz ◽  
Vitali Nagirnyi ◽  
Aleksei Kotlov ◽  
Stefan Lis
Keyword(s):  
Crystal Structure ◽  
Luminescent Properties ◽  
Luminescence Spectroscopy ◽  
Doped Materials ◽  
The Eu

The crystal structure of gadolinium oxyfluoride was revised. Luminescent properties of the Eu3+-doped materials were characterized by luminescence spectroscopy.

scholarly journals Crystal Structure and Optical Properties of a Homometallic Heterotrinuclear Europium(III) Complex – a Cationic Eu(III) ion Coordinated by two [Eu(III)DOTA]- Complexes

2021 ◽  
Author(s):  
Maria Storm Thomsen ◽  
Ander Østergård Madsen ◽  
Thomas Just Sørensen
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Coordination Number ◽  
Luminescence Spectroscopy ◽  
Data Sets ◽  
Complex Data ◽  
Triclinic Space Group ◽  
Coordination Environment ◽  
High Asymmetry ◽  
State Luminescence

The structure and solid state luminescence properties of a homometallic heterotrinuclear [Eu(μO)5(OH2)3][Eu(DOTA)(H2O)]2Cl crystal was determined and was found to have two sites: a free europium(III) ion and a [Eu(DOTA)(H2O)]- complex. The trinuclear compound crystallizes in a laminar structure in triclinic space group P. The crystal structure was determined using complex data treatment due to non-merohedric twinning. Experimental data sets were recorded with large redundancy and separated according to scattering domain in order to obtain a reliable structure, which revealed the configuration of the europium(III) sites. In first site, the europium(III) 1,4,7,10-tetrazacyclododecane-1,4,7,10-tetraacetate (Eu.DOTA) complex was found to adopt a capped twisted square antiprismatic (cTSAP) conformation, where a capping water molecule increased the coordination number of the europium(III) site to nine (CN = 9). In the second site, the cationic europium(III) ion was found to be coordinated by three water molecules and five oxy groups from neighboring [Eu(DOTA)(H2O)]- complexes. The coordination geometry of this site was found to be a compressed square antiprism (SAP), and the coordination number of the europium(III) ion was found to be eight (CN = 8). A large increase in rate constant of luminescence was observed for Eu(III) in [Eu(DOTA)(H2O)]- in solid state luminescence spectroscopy measurements compared to in solution, which lead to investigations of single-crystals in deuterated media to exclude additional effects of quenching. We conclude that the most probable cause of the decrease in observed luminescence lifetimes is the high asymmetry of the coordination environment of [Eu(DOTA)(D2O)]- in the [Eu(μO)5(OD2)3][Eu(DOTA)(D2O)]2Cl crystals<br>

Crystal structure and optical properties of a two-sited EuIII compound: an EuIII ion coordinated by two [EuIII(DOTA)]− complexes (DOTA is 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetate)

2021 ◽  
Vol 77 (7) ◽  
Author(s):  
Maria Storm Thomsen ◽  
Anders Ø. Madsen ◽  
Thomas Just Sørensen
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Coordination Number ◽  
Luminescence Spectroscopy ◽  
Data Sets ◽  
Complex Data ◽  
Triclinic Space Group ◽  
High Asymmetry ◽  
State Luminescence ◽  
The Eu

The structure and solid-state luminescence properties of an EuIII compound with two different lanthanide sites, [Eu(μ-O)5(OH)(H2O)2][Eu(DOTA)(H2O)]2 (DOTA is 1,4,7,10-tetrazacyclododecane-1,4,7,10-tetraacetate, C16H24N4O8), were determined. The compound crystallizes in a laminar structure in the triclinic space group P\overline{1}, where the two sites are a free europium(III) ion and an [Eu(DOTA)(H2O)]− complex. The crystal structure was determined using complex data treatment due to nonmerohedral twinning. Experimental data sets were recorded with large redundancy and separated according to scattering domains in order to obtain a reliable structure. In the first site, the [Eu(DOTA)(H2O)]− complex was found to adopt a capped twisted square-antiprismatic (cTSAP) conformation, where a capping water molecule increased the coordination number of the europium(III) site to nine (CN = 9). In the second site, the europium(III) ion was found to be coordinated by two water molecules, one hydroxide group and five oxide groups from neighbouring [Eu(DOTA)(H2O)]− complexes. The coordination geometry of this site was found to be a compressed square antiprism (SAP) and the coordination number of the europium(III) ion was found to be eight (CN = 8). A large increase in the rate constant of luminescence was observed for EuIII in [Eu(DOTA)(H2O)]− in solid-state luminescence spectroscopy measurements compared to in solution, which led to investigations of single crystals in deuterated media to exclude additional effects of quenching. We conclude that the most probable cause of the decrease in the observed luminescence lifetimes is the high asymmetry of the coordination environment of [Eu(DOTA)(D2O)]− in the [Eu(μ-O)5(OD)(D2O)2][Eu(DOTA)(D2O)]2 crystals.

scholarly journals Crystal Structure and Optical Properties of a Homometallic Heterotrinuclear Europium(III) Complex – a Cationic Eu(III) ion Coordinated by two [Eu(III)DOTA]- Complexes

2021 ◽  
Author(s):  
Maria Storm Thomsen ◽  
Ander Østergård Madsen ◽  
Thomas Just Sørensen
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Coordination Number ◽  
Luminescence Spectroscopy ◽  
Data Sets ◽  
Complex Data ◽  
Triclinic Space Group ◽  
Coordination Environment ◽  
High Asymmetry ◽  
State Luminescence

The structure and solid state luminescence properties of a homometallic heterotrinuclear [Eu(μO)5(OH2)3][Eu(DOTA)(H2O)]2Cl crystal was determined and was found to have two sites: a free europium(III) ion and a [Eu(DOTA)(H2O)]- complex. The trinuclear compound crystallizes in a laminar structure in triclinic space group P. The crystal structure was determined using complex data treatment due to non-merohedric twinning. Experimental data sets were recorded with large redundancy and separated according to scattering domain in order to obtain a reliable structure, which revealed the configuration of the europium(III) sites. In first site, the europium(III) 1,4,7,10-tetrazacyclododecane-1,4,7,10-tetraacetate (Eu.DOTA) complex was found to adopt a capped twisted square antiprismatic (cTSAP) conformation, where a capping water molecule increased the coordination number of the europium(III) site to nine (CN = 9). In the second site, the cationic europium(III) ion was found to be coordinated by three water molecules and five oxy groups from neighboring [Eu(DOTA)(H2O)]- complexes. The coordination geometry of this site was found to be a compressed square antiprism (SAP), and the coordination number of the europium(III) ion was found to be eight (CN = 8). A large increase in rate constant of luminescence was observed for Eu(III) in [Eu(DOTA)(H2O)]- in solid state luminescence spectroscopy measurements compared to in solution, which lead to investigations of single-crystals in deuterated media to exclude additional effects of quenching. We conclude that the most probable cause of the decrease in observed luminescence lifetimes is the high asymmetry of the coordination environment of [Eu(DOTA)(D2O)]- in the [Eu(μO)5(OD2)3][Eu(DOTA)(D2O)]2Cl crystals<br>

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