Structural and Photoluminescent Properties of a Novel Terbium Bis(thiocyanato)aurate, Tb[Au(SCN)<sub>2</sub>]<sub>3</sub>·6H<sub>2</sub>O
The reaction of Tb<sup>3+</sup> ions with KAu(SCN)<sub>2</sub> results in the formation of the crystalline coordination compound Tb[Au(SCN)<sub>2</sub>]<sub>3</sub>·6H<sub>2</sub>O. Single-crystal X-ray diffraction has been employed to inve...
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| Format: | Article |
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MDPI AG
2023-10-01
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| Series: | Inorganics |
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| Online Access: | https://www.mdpi.com/2304-6740/11/11/419 |
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| author | Jared D. Taylor Richard E. Sykora |
| author_facet | Jared D. Taylor Richard E. Sykora |
| author_sort | Jared D. Taylor |
| collection | DOAJ |
| description | The reaction of Tb<sup>3+</sup> ions with KAu(SCN)<sub>2</sub> results in the formation of the crystalline coordination compound Tb[Au(SCN)<sub>2</sub>]<sub>3</sub>·6H<sub>2</sub>O. Single-crystal X-ray diffraction has been employed to investigate the structural features of this compound. The crystallographic data are as follows (Mo K<sub>α</sub>, λ = 0.71073 Å): orthorhombic, <i>Cmcm</i>, <i>a</i> = 12.4907(9) Å, <i>b</i> = 8.5845(6) Å, <i>c</i> = 20.7498(8) Å, <i>V</i> = 3679.72(16) Å<sup>3</sup>, <i>Z</i> = 4, <i>R</i><sub>1</sub>(I > 2(σ)) = 0.0232. This material represents the first known example of a lanthanide dithiocyanatoaurate compound. Au(SCN)<sub>2</sub><sup>−</sup> anions bridge Tb<sup>3+</sup> centers in a bidentate fashion to form the [Tb(H<sub>2</sub>O)<sub>4</sub>(Au(SCN)<sub>2</sub>)<sub>2</sub>]͚<sup>+</sup> 1D chains present in the structure. Trimeric Au units in the structure contain short aurophilic bonding interactions with distances of 3.1066(4) Å. The more common O–H‧‧‧O and O–H‧‧‧N H-bonding interactions in the structure are overshadowed by relatively rare O–H‧‧‧S interactions involving the bis(thiocyanato)gold(I) anions. Photoluminescence measurements illustrate that Tb[Au(SCN)<sub>2</sub>]<sub>3</sub>·6H<sub>2</sub>O displays strong Tb<sup>3+</sup>-based emission, but there is a lack of Au-based emission down to 85 K. Excitation spectra are recorded for the title compound and these measurements demonstrate the presence of a donor–acceptor process within the compound, leading to enhanced Tb<sup>3+</sup>-based emission. |
| first_indexed | 2024-03-09T16:43:36Z |
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| spelling | doaj.art-0070a788a3154e6aa57e4df222c256fc2023-11-24T14:48:23ZengMDPI AGInorganics2304-67402023-10-01111141910.3390/inorganics11110419Structural and Photoluminescent Properties of a Novel Terbium Bis(thiocyanato)aurate, Tb[Au(SCN)<sub>2</sub>]<sub>3</sub>·6H<sub>2</sub>OJared D. Taylor0Richard E. Sykora1Department of Chemistry, University of South Alabama, 6040 USA Drive South, Chemistry Building Room 223, Mobile, AL 36688, USADepartment of Chemistry, University of South Alabama, 6040 USA Drive South, Chemistry Building Room 223, Mobile, AL 36688, USAThe reaction of Tb<sup>3+</sup> ions with KAu(SCN)<sub>2</sub> results in the formation of the crystalline coordination compound Tb[Au(SCN)<sub>2</sub>]<sub>3</sub>·6H<sub>2</sub>O. Single-crystal X-ray diffraction has been employed to investigate the structural features of this compound. The crystallographic data are as follows (Mo K<sub>α</sub>, λ = 0.71073 Å): orthorhombic, <i>Cmcm</i>, <i>a</i> = 12.4907(9) Å, <i>b</i> = 8.5845(6) Å, <i>c</i> = 20.7498(8) Å, <i>V</i> = 3679.72(16) Å<sup>3</sup>, <i>Z</i> = 4, <i>R</i><sub>1</sub>(I > 2(σ)) = 0.0232. This material represents the first known example of a lanthanide dithiocyanatoaurate compound. Au(SCN)<sub>2</sub><sup>−</sup> anions bridge Tb<sup>3+</sup> centers in a bidentate fashion to form the [Tb(H<sub>2</sub>O)<sub>4</sub>(Au(SCN)<sub>2</sub>)<sub>2</sub>]͚<sup>+</sup> 1D chains present in the structure. Trimeric Au units in the structure contain short aurophilic bonding interactions with distances of 3.1066(4) Å. The more common O–H‧‧‧O and O–H‧‧‧N H-bonding interactions in the structure are overshadowed by relatively rare O–H‧‧‧S interactions involving the bis(thiocyanato)gold(I) anions. Photoluminescence measurements illustrate that Tb[Au(SCN)<sub>2</sub>]<sub>3</sub>·6H<sub>2</sub>O displays strong Tb<sup>3+</sup>-based emission, but there is a lack of Au-based emission down to 85 K. Excitation spectra are recorded for the title compound and these measurements demonstrate the presence of a donor–acceptor process within the compound, leading to enhanced Tb<sup>3+</sup>-based emission.https://www.mdpi.com/2304-6740/11/11/419terbiumbis(thiocyanato)Au(I)single-crystal X-ray diffractionenergy transferphotoluminescence |
| spellingShingle | Jared D. Taylor Richard E. Sykora Structural and Photoluminescent Properties of a Novel Terbium Bis(thiocyanato)aurate, Tb[Au(SCN)<sub>2</sub>]<sub>3</sub>·6H<sub>2</sub>O Inorganics terbium bis(thiocyanato)Au(I) single-crystal X-ray diffraction energy transfer photoluminescence |
| title | Structural and Photoluminescent Properties of a Novel Terbium Bis(thiocyanato)aurate, Tb[Au(SCN)<sub>2</sub>]<sub>3</sub>·6H<sub>2</sub>O |
| title_full | Structural and Photoluminescent Properties of a Novel Terbium Bis(thiocyanato)aurate, Tb[Au(SCN)<sub>2</sub>]<sub>3</sub>·6H<sub>2</sub>O |
| title_fullStr | Structural and Photoluminescent Properties of a Novel Terbium Bis(thiocyanato)aurate, Tb[Au(SCN)<sub>2</sub>]<sub>3</sub>·6H<sub>2</sub>O |
| title_full_unstemmed | Structural and Photoluminescent Properties of a Novel Terbium Bis(thiocyanato)aurate, Tb[Au(SCN)<sub>2</sub>]<sub>3</sub>·6H<sub>2</sub>O |
| title_short | Structural and Photoluminescent Properties of a Novel Terbium Bis(thiocyanato)aurate, Tb[Au(SCN)<sub>2</sub>]<sub>3</sub>·6H<sub>2</sub>O |
| title_sort | structural and photoluminescent properties of a novel terbium bis thiocyanato aurate tb au scn sub 2 sub sub 3 sub ·6h sub 2 sub o |
| topic | terbium bis(thiocyanato)Au(I) single-crystal X-ray diffraction energy transfer photoluminescence |
| url | https://www.mdpi.com/2304-6740/11/11/419 |
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