From a Well-Defined Organozinc Precursor to Diverse Luminescent Coordination Polymers Based on Zn(II)-Quinolinate Building Units Interconnected by Mixed Ligand Systems
Introduction of photoactive building blocks into mixed-ligand coordination polymers appears to be a promising way to produce new advanced luminescent materials. However, rational design and self-assembly of the multi-component supramolecular systems is challenging from both a conceptual and syntheti...
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| Format: | Article |
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MDPI AG
2021-12-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/26/23/7402 |
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| author | Katarzyna Sołtys-Brzostek Kamil Sokołowski Iwona Justyniak Michał K. Leszczyński Natalia Olejnik-Fehér Janusz Lewiński |
| author_facet | Katarzyna Sołtys-Brzostek Kamil Sokołowski Iwona Justyniak Michał K. Leszczyński Natalia Olejnik-Fehér Janusz Lewiński |
| author_sort | Katarzyna Sołtys-Brzostek |
| collection | DOAJ |
| description | Introduction of photoactive building blocks into mixed-ligand coordination polymers appears to be a promising way to produce new advanced luminescent materials. However, rational design and self-assembly of the multi-component supramolecular systems is challenging from both a conceptual and synthetic perspective. Here, we report exploratory studies that investigate the potential of [Zn(q)<sub>2</sub>]<sub>2</sub>[<i>t</i>BuZn(OH)]<sub>2</sub> complex (q = deprotonated 8-hydroxyquinoline) as an organozinc precursor as well as a mixed-ligand synthetic strategy for the preparation of new luminescent coordination polymers (CPs). As a result we present three new 2D mixed-ligand Zn(II)-quinolinate coordination polymers which are based on various zinc quinolinate secondary building units interconnected by two different organic linker types, i.e., deprotonated 4,4′-oxybisbenzoic acid (H<sub>2</sub><i>obc</i>) as a flexible dicarboxylate linker and/or selected bipyridines (<i>bipy</i>). Remarkably, using the title organozinc precursors in a combination with H<sub>2</sub><i>obc</i> and 4,4′-bipyridine, a novel molecular zinc quinolinate building unit, [Zn<sub>4</sub>(q)<sub>6</sub>(<i>bipy</i>)<sub>2</sub>(<i>obc</i>)<sub>2</sub>], was obtained which self-assembled into a chain-type hydrogen-bonded network. The application of the organometallic precursor allowed for its direct reaction with the selected ligands at ambient temperature, avoiding the use of both solvothermal conditions and additional base reagents. In turn, the reaction involving Zn(NO<sub>3</sub>)<sub>2</sub>, as a classical inorganic precursor, in a combination with H<sub>2</sub><i>obc</i> and <i>bipy</i> led to a novel 1D coordination polymer [Zn<sub>2</sub>(q)<sub>2</sub>(NO<sub>3</sub>)<sub>2</sub>(<i>bipy</i>)]. While the presence of H<sub>2</sub><i>obc</i> was essential for the formation of this coordination polymer, this ditopic linker was not incorporated into the isolated product, which indicates its templating behavior. The reported compounds were characterized by single-crystal and powder X-ray diffraction, elemental analysis as well as UV-Vis and photoluminescence spectroscopy. |
| first_indexed | 2024-03-10T04:47:48Z |
| format | Article |
| id | doaj.art-d5f6bee590dd4abf905d53ead65bc7c8 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-10T04:47:48Z |
| publishDate | 2021-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-d5f6bee590dd4abf905d53ead65bc7c82023-11-23T02:52:04ZengMDPI AGMolecules1420-30492021-12-012623740210.3390/molecules26237402From a Well-Defined Organozinc Precursor to Diverse Luminescent Coordination Polymers Based on Zn(II)-Quinolinate Building Units Interconnected by Mixed Ligand SystemsKatarzyna Sołtys-Brzostek0Kamil Sokołowski1Iwona Justyniak2Michał K. Leszczyński3Natalia Olejnik-Fehér4Janusz Lewiński5Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, PolandInstitute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, PolandInstitute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, PolandInstitute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, PolandInstitute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, PolandInstitute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, PolandIntroduction of photoactive building blocks into mixed-ligand coordination polymers appears to be a promising way to produce new advanced luminescent materials. However, rational design and self-assembly of the multi-component supramolecular systems is challenging from both a conceptual and synthetic perspective. Here, we report exploratory studies that investigate the potential of [Zn(q)<sub>2</sub>]<sub>2</sub>[<i>t</i>BuZn(OH)]<sub>2</sub> complex (q = deprotonated 8-hydroxyquinoline) as an organozinc precursor as well as a mixed-ligand synthetic strategy for the preparation of new luminescent coordination polymers (CPs). As a result we present three new 2D mixed-ligand Zn(II)-quinolinate coordination polymers which are based on various zinc quinolinate secondary building units interconnected by two different organic linker types, i.e., deprotonated 4,4′-oxybisbenzoic acid (H<sub>2</sub><i>obc</i>) as a flexible dicarboxylate linker and/or selected bipyridines (<i>bipy</i>). Remarkably, using the title organozinc precursors in a combination with H<sub>2</sub><i>obc</i> and 4,4′-bipyridine, a novel molecular zinc quinolinate building unit, [Zn<sub>4</sub>(q)<sub>6</sub>(<i>bipy</i>)<sub>2</sub>(<i>obc</i>)<sub>2</sub>], was obtained which self-assembled into a chain-type hydrogen-bonded network. The application of the organometallic precursor allowed for its direct reaction with the selected ligands at ambient temperature, avoiding the use of both solvothermal conditions and additional base reagents. In turn, the reaction involving Zn(NO<sub>3</sub>)<sub>2</sub>, as a classical inorganic precursor, in a combination with H<sub>2</sub><i>obc</i> and <i>bipy</i> led to a novel 1D coordination polymer [Zn<sub>2</sub>(q)<sub>2</sub>(NO<sub>3</sub>)<sub>2</sub>(<i>bipy</i>)]. While the presence of H<sub>2</sub><i>obc</i> was essential for the formation of this coordination polymer, this ditopic linker was not incorporated into the isolated product, which indicates its templating behavior. The reported compounds were characterized by single-crystal and powder X-ray diffraction, elemental analysis as well as UV-Vis and photoluminescence spectroscopy.https://www.mdpi.com/1420-3049/26/23/7402organozinc complexescoordination polymerhydroxyquinolineself-assembly |
| spellingShingle | Katarzyna Sołtys-Brzostek Kamil Sokołowski Iwona Justyniak Michał K. Leszczyński Natalia Olejnik-Fehér Janusz Lewiński From a Well-Defined Organozinc Precursor to Diverse Luminescent Coordination Polymers Based on Zn(II)-Quinolinate Building Units Interconnected by Mixed Ligand Systems Molecules organozinc complexes coordination polymer hydroxyquinoline self-assembly |
| title | From a Well-Defined Organozinc Precursor to Diverse Luminescent Coordination Polymers Based on Zn(II)-Quinolinate Building Units Interconnected by Mixed Ligand Systems |
| title_full | From a Well-Defined Organozinc Precursor to Diverse Luminescent Coordination Polymers Based on Zn(II)-Quinolinate Building Units Interconnected by Mixed Ligand Systems |
| title_fullStr | From a Well-Defined Organozinc Precursor to Diverse Luminescent Coordination Polymers Based on Zn(II)-Quinolinate Building Units Interconnected by Mixed Ligand Systems |
| title_full_unstemmed | From a Well-Defined Organozinc Precursor to Diverse Luminescent Coordination Polymers Based on Zn(II)-Quinolinate Building Units Interconnected by Mixed Ligand Systems |
| title_short | From a Well-Defined Organozinc Precursor to Diverse Luminescent Coordination Polymers Based on Zn(II)-Quinolinate Building Units Interconnected by Mixed Ligand Systems |
| title_sort | from a well defined organozinc precursor to diverse luminescent coordination polymers based on zn ii quinolinate building units interconnected by mixed ligand systems |
| topic | organozinc complexes coordination polymer hydroxyquinoline self-assembly |
| url | https://www.mdpi.com/1420-3049/26/23/7402 |
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