Luminescent Zn Halide Complexes with 2-(2-Aminophenyl)benzothiazole Derivatives
We report a comparative study of coordination behaviour of 2-(2-aminophenyl)benzothiazole (NH<sub>2</sub>-<i>pbt</i>) and its phosphorus-containing derivative, α-aminophosphine oxide (PCNH-<i>pbt</i>), towards zinc halides. The corresponding coordination compounds...
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MDPI AG
2022-09-01
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| Series: | Inorganics |
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| Online Access: | https://www.mdpi.com/2304-6740/10/9/138 |
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| author | Taisiya S. Sukhikh Dmitry S. Kolybalov Ekaterina K. Pylova Sergey N. Konchenko |
| author_facet | Taisiya S. Sukhikh Dmitry S. Kolybalov Ekaterina K. Pylova Sergey N. Konchenko |
| author_sort | Taisiya S. Sukhikh |
| collection | DOAJ |
| description | We report a comparative study of coordination behaviour of 2-(2-aminophenyl)benzothiazole (NH<sub>2</sub>-<i>pbt</i>) and its phosphorus-containing derivative, α-aminophosphine oxide (PCNH-<i>pbt</i>), towards zinc halides. The corresponding coordination compounds [Zn(L)<sub>2</sub>Hal<sub>2</sub>] (L = PCNH-<i>pbt</i>, Hal = Cl, <b>1</b> and Hal = Br, <b>2</b>) and [Zn(L’)Hal<sub>2</sub>] (L’ = NH<sub>2</sub>-<i>pbt,</i> Hal = Cl, <b>3</b> and Hal = Br, <b>4</b>) were obtained as single phases. As evidenced by single-crystal X-ray diffraction analysis, L’ ligand coordinates to Zn in a chelate manner via two N atoms. Despite a similar coordination mode in complexes <b>3</b> and <b>4</b>, the spatial geometry of the ligand differs notably, which implies a relatively high flexibility of NH<sub>2</sub>-<i>pbt</i>. The L ligand exhibits another coordination mode, binding with Zn only via the oxygen of the P=O group. The differences in the structures of NH<sub>2</sub>-<i>pbt</i>, <b>3</b> and <b>4</b>, and their counterparts, PCNH-<i>pbt</i>, <b>1</b> and <b>2,</b> induce differences in their solid-state photoluminescence properties. The former group of the compounds exhibits conventional single-band emission, while the latter group reveals two bands. The minor band at 450 nm is ascribed to a radiative transition for the regular amine species, while the major band at 520–550 nm can be associated either with the proton-transferred imine species (ESIPT mechanism) or with a charge transfer state (TICT) with a different geometry. |
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| institution | Directory Open Access Journal |
| issn | 2304-6740 |
| language | English |
| last_indexed | 2024-03-09T23:39:38Z |
| publishDate | 2022-09-01 |
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| series | Inorganics |
| spelling | doaj.art-1f83fac5a17d447fbc768d87cdf594ed2023-11-23T16:54:08ZengMDPI AGInorganics2304-67402022-09-0110913810.3390/inorganics10090138Luminescent Zn Halide Complexes with 2-(2-Aminophenyl)benzothiazole DerivativesTaisiya S. Sukhikh0Dmitry S. Kolybalov1Ekaterina K. Pylova2Sergey N. Konchenko3Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk 630090, RussiaNikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk 630090, RussiaNikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk 630090, RussiaNikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk 630090, RussiaWe report a comparative study of coordination behaviour of 2-(2-aminophenyl)benzothiazole (NH<sub>2</sub>-<i>pbt</i>) and its phosphorus-containing derivative, α-aminophosphine oxide (PCNH-<i>pbt</i>), towards zinc halides. The corresponding coordination compounds [Zn(L)<sub>2</sub>Hal<sub>2</sub>] (L = PCNH-<i>pbt</i>, Hal = Cl, <b>1</b> and Hal = Br, <b>2</b>) and [Zn(L’)Hal<sub>2</sub>] (L’ = NH<sub>2</sub>-<i>pbt,</i> Hal = Cl, <b>3</b> and Hal = Br, <b>4</b>) were obtained as single phases. As evidenced by single-crystal X-ray diffraction analysis, L’ ligand coordinates to Zn in a chelate manner via two N atoms. Despite a similar coordination mode in complexes <b>3</b> and <b>4</b>, the spatial geometry of the ligand differs notably, which implies a relatively high flexibility of NH<sub>2</sub>-<i>pbt</i>. The L ligand exhibits another coordination mode, binding with Zn only via the oxygen of the P=O group. The differences in the structures of NH<sub>2</sub>-<i>pbt</i>, <b>3</b> and <b>4</b>, and their counterparts, PCNH-<i>pbt</i>, <b>1</b> and <b>2,</b> induce differences in their solid-state photoluminescence properties. The former group of the compounds exhibits conventional single-band emission, while the latter group reveals two bands. The minor band at 450 nm is ascribed to a radiative transition for the regular amine species, while the major band at 520–550 nm can be associated either with the proton-transferred imine species (ESIPT mechanism) or with a charge transfer state (TICT) with a different geometry.https://www.mdpi.com/2304-6740/10/9/138coordination compoundsheterocyclic compoundssingle crystal X-ray diffractionluminescence |
| spellingShingle | Taisiya S. Sukhikh Dmitry S. Kolybalov Ekaterina K. Pylova Sergey N. Konchenko Luminescent Zn Halide Complexes with 2-(2-Aminophenyl)benzothiazole Derivatives Inorganics coordination compounds heterocyclic compounds single crystal X-ray diffraction luminescence |
| title | Luminescent Zn Halide Complexes with 2-(2-Aminophenyl)benzothiazole Derivatives |
| title_full | Luminescent Zn Halide Complexes with 2-(2-Aminophenyl)benzothiazole Derivatives |
| title_fullStr | Luminescent Zn Halide Complexes with 2-(2-Aminophenyl)benzothiazole Derivatives |
| title_full_unstemmed | Luminescent Zn Halide Complexes with 2-(2-Aminophenyl)benzothiazole Derivatives |
| title_short | Luminescent Zn Halide Complexes with 2-(2-Aminophenyl)benzothiazole Derivatives |
| title_sort | luminescent zn halide complexes with 2 2 aminophenyl benzothiazole derivatives |
| topic | coordination compounds heterocyclic compounds single crystal X-ray diffraction luminescence |
| url | https://www.mdpi.com/2304-6740/10/9/138 |
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