A robust and multifunctional calcium coordination polymer as a selective fluorescent sensor for acetone and iron (+3) and as a tunable proton conductor
| Autor: | Guo-Dong Zou, Hao Wang, Xiao-Ying Huang, Ever Velasco, Jing Li, Zhihua Fu, Zhao-Feng Wu, Kai Xing |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Journal of Materials Chemistry C. 8:16784-16789 |
| ISSN: | 2050-7534 2050-7526 |
| DOI: | 10.1039/d0tc04371k |
| Popis: | A multifunctional calcium coordination polymer (Ca-CP) formulated as [(CH3)2NH2][Ca(Me2tcpbH)(H2O)] (1) has been synthesized and characterized. Compound 1 features a robust and novel three-dimensional (3D) network with cage-like cavities. The high thermal and moisture stability of the title compound makes it a good candidate for possible environment or energy related applications. Fluorescence (FL) studies demonstrate that 1 shows emission with a maximum at 350 nm under 270 nm excitation. The title compound acts as a selective and sensitive fluorescent sensor for the detection of acetone and Fe3+ ions at low concentrations. The FL intensity quenching percentage and the concentration ratio of Fe3+/Fe2+ showed a linear relation with a Fe3+ concentration as low as 50 μM in Fe2+ aqueous solutions, offering an easy way to probe the extent of Fe2+ oxidation. Moreover, due to the relatively high hydration character of Ca2+, the terminal water molecules and undeprotonated carboxylate groups form a strong hydrogen-bonded network within the structure, facilitating its tunable proton conduction under various humidity and temperature conditions. The proton conducting mechanism has been investigated using PXRD, IR, and EA methods. |
| Databáze: | OpenAIRE |
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