Heteroctanuclear Au<sub>4</sub>Ag<sub>4</sub> Cluster Complexes of 4,5-Diethynylacridin-9-One with Luminescent Mechanochromism
Two heteroctanuclear Au<sub>4</sub>Ag<sub>4</sub> cluster complexes of 4,5-diethynylacridin-9-one (H<sub>2</sub>L) were prepared through the self-assembly reactions of [Au(tht)<sub>2</sub>](CF<sub>3</sub>SO<sub>3</sub>), Ag(tht)...
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MDPI AG
2022-03-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/27/7/2127 |
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| author | Pei Xie Jin-Yun Wang Ya-Zi Huang Xue-Meng Wu Zhong-Ning Chen |
| author_facet | Pei Xie Jin-Yun Wang Ya-Zi Huang Xue-Meng Wu Zhong-Ning Chen |
| author_sort | Pei Xie |
| collection | DOAJ |
| description | Two heteroctanuclear Au<sub>4</sub>Ag<sub>4</sub> cluster complexes of 4,5-diethynylacridin-9-one (H<sub>2</sub>L) were prepared through the self-assembly reactions of [Au(tht)<sub>2</sub>](CF<sub>3</sub>SO<sub>3</sub>), Ag(tht)(CF<sub>3</sub>SO<sub>3</sub>), H<sub>2</sub>L and PPh<sub>3</sub> or PPh<sub>2</sub>Py (2-(diphenylphosphino)pyridine). The Au<sub>4</sub>Ag<sub>4</sub> cluster consists of a [Au<sub>4</sub>L<sub>4</sub>]<sup>4−</sup> and four [Ag(PPh<sub>3</sub>)]<sup>+</sup> or [Ag(PPh<sub>2</sub>Py)]<sup>+</sup> units with Au<sub>4</sub>L<sub>4</sub> framework exhibiting a twisted paper clip structure. In CH<sub>2</sub>Cl<sub>2</sub> solutions at ambient temperature, both compounds show ligand fluorescence at ca. 463 nm as well as phosphorescence at 650 nm for <b>1</b> and 630 nm for <b>2</b> resulting from admixture of <sup>3</sup>IL (intraligand) of L ligand, <sup>3</sup>LMCT (from L ligand to Au<sub>4</sub>Ag<sub>4</sub>) and <sup>3</sup>MC (metal-cluster) triplet states. Crystals or crystalline powders manifest bright yellow-green phosphorescence with vibronic-structured emission bands at 530 (568sh) nm for complex <b>1</b> and 536 (576sh) nm for complex <b>2</b>. Upon mechanical grinding, yellow-green emission in the crystalline state is dramatically converted to red luminescence centered at ca. 610 nm with a drastic redshift of the emission after crystal packing is destroyed. |
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| language | English |
| last_indexed | 2024-03-09T11:36:40Z |
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| spelling | doaj.art-0db82d1cb2e04f1486385380b35851452023-11-30T23:39:55ZengMDPI AGMolecules1420-30492022-03-01277212710.3390/molecules27072127Heteroctanuclear Au<sub>4</sub>Ag<sub>4</sub> Cluster Complexes of 4,5-Diethynylacridin-9-One with Luminescent MechanochromismPei Xie0Jin-Yun Wang1Ya-Zi Huang2Xue-Meng Wu3Zhong-Ning Chen4College of Chemistry, Fuzhou University, Fuzhou 350108, ChinaState Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350100, ChinaState Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350100, ChinaState Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350100, ChinaCollege of Chemistry, Fuzhou University, Fuzhou 350108, ChinaTwo heteroctanuclear Au<sub>4</sub>Ag<sub>4</sub> cluster complexes of 4,5-diethynylacridin-9-one (H<sub>2</sub>L) were prepared through the self-assembly reactions of [Au(tht)<sub>2</sub>](CF<sub>3</sub>SO<sub>3</sub>), Ag(tht)(CF<sub>3</sub>SO<sub>3</sub>), H<sub>2</sub>L and PPh<sub>3</sub> or PPh<sub>2</sub>Py (2-(diphenylphosphino)pyridine). The Au<sub>4</sub>Ag<sub>4</sub> cluster consists of a [Au<sub>4</sub>L<sub>4</sub>]<sup>4−</sup> and four [Ag(PPh<sub>3</sub>)]<sup>+</sup> or [Ag(PPh<sub>2</sub>Py)]<sup>+</sup> units with Au<sub>4</sub>L<sub>4</sub> framework exhibiting a twisted paper clip structure. In CH<sub>2</sub>Cl<sub>2</sub> solutions at ambient temperature, both compounds show ligand fluorescence at ca. 463 nm as well as phosphorescence at 650 nm for <b>1</b> and 630 nm for <b>2</b> resulting from admixture of <sup>3</sup>IL (intraligand) of L ligand, <sup>3</sup>LMCT (from L ligand to Au<sub>4</sub>Ag<sub>4</sub>) and <sup>3</sup>MC (metal-cluster) triplet states. Crystals or crystalline powders manifest bright yellow-green phosphorescence with vibronic-structured emission bands at 530 (568sh) nm for complex <b>1</b> and 536 (576sh) nm for complex <b>2</b>. Upon mechanical grinding, yellow-green emission in the crystalline state is dramatically converted to red luminescence centered at ca. 610 nm with a drastic redshift of the emission after crystal packing is destroyed.https://www.mdpi.com/1420-3049/27/7/2127clustergoldheteronuclearluminescencemechanochromismsilver |
| spellingShingle | Pei Xie Jin-Yun Wang Ya-Zi Huang Xue-Meng Wu Zhong-Ning Chen Heteroctanuclear Au<sub>4</sub>Ag<sub>4</sub> Cluster Complexes of 4,5-Diethynylacridin-9-One with Luminescent Mechanochromism Molecules cluster gold heteronuclear luminescence mechanochromism silver |
| title | Heteroctanuclear Au<sub>4</sub>Ag<sub>4</sub> Cluster Complexes of 4,5-Diethynylacridin-9-One with Luminescent Mechanochromism |
| title_full | Heteroctanuclear Au<sub>4</sub>Ag<sub>4</sub> Cluster Complexes of 4,5-Diethynylacridin-9-One with Luminescent Mechanochromism |
| title_fullStr | Heteroctanuclear Au<sub>4</sub>Ag<sub>4</sub> Cluster Complexes of 4,5-Diethynylacridin-9-One with Luminescent Mechanochromism |
| title_full_unstemmed | Heteroctanuclear Au<sub>4</sub>Ag<sub>4</sub> Cluster Complexes of 4,5-Diethynylacridin-9-One with Luminescent Mechanochromism |
| title_short | Heteroctanuclear Au<sub>4</sub>Ag<sub>4</sub> Cluster Complexes of 4,5-Diethynylacridin-9-One with Luminescent Mechanochromism |
| title_sort | heteroctanuclear au sub 4 sub ag sub 4 sub cluster complexes of 4 5 diethynylacridin 9 one with luminescent mechanochromism |
| topic | cluster gold heteronuclear luminescence mechanochromism silver |
| url | https://www.mdpi.com/1420-3049/27/7/2127 |
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