Fast and stable vapochromic response induced through nanocrystal formation of a luminescent platinum(II) complex on periodic mesoporous organosilica
| Autor: | Atsushi Kobayashi, Shinji Inagaki, Hiroki Matsukawa, Ayana Sato-Tomita, Takahiro Tsunenari, Masaki Yoshida, Shunsuke Nozawa, Masako Kato, Yoshifumi Maegawa |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
lcsh:Medicine chemistry.chemical_element 02 engineering and technology 010402 general chemistry Photochemistry 01 natural sciences Article chemistry.chemical_compound Bipyridine Pyridine lcsh:Science Multidisciplinary lcsh:R 021001 nanoscience & nanotechnology humanities 0104 chemical sciences Coordination chemistry Mesoporous organosilica chemistry Nanocrystal lcsh:Q Materials chemistry Methanol 0210 nano-technology Luminescence Platinum Protic solvent |
| Zdroj: | Scientific Reports Scientific Reports, Vol 9, Iss 1, Pp 1-11 (2019) |
| ISSN: | 2045-2322 |
| Popis: | A hybrid vapoluminescent system exhibiting fast and repeatable response was constructed using periodic mesoporous organosilica with bipyridine moieties (BPy-PMO) and a Pt(II) complex bearing a potentially luminescent 2-phenylpyridinato (ppy) ligand. An intense red luminescence appeared when the Pt(II)-complex immobilised BPy-PMO was exposed to methanol vapour and disappeared on exposure to pyridine vapour. The ON-OFF vapochromic behaviour occurred repeatedly in a methanol/pyridine/heating cycle. Interestingly, a rapid response was achieved in the second cycle and cycles thereafter. Scanning and transmission electron microscopies (SEM/TEM), absorption and emission, and nuclear magnetic resonance spectroscopies, mass spectrometry, and powder X-ray diffraction indicated that methanol vapour induced Si-C cleavage and thus liberated [Pt(ppy)(bpy)]Cl (bpy = 2,2′-bipyridine) from the BPy-PMO framework. Furthermore, the self-assembling properties of the Pt(II) complex resulted in the formation of highly luminescent micro/nanocrystals that were homogeneously dispersed on the porous support. The unique vapoluminescence triggered by the unprecedented protodesilylation on exposure to protic solvent vapour at room temperature is attributable to BPy-PMO being a giant ligand and an effective vapour condenser. Consequently, this hybrid system presents a new strategy for developing sensors using bulk powdery materials. |
| Databáze: | OpenAIRE |
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