Metal-organic framework film for fluorescence turn-on H2S gas sensing and anti-counterfeiting patterns

Metal-organic framework film for fluorescence turn-on H2S gas sensing and anti-counterfeiting patterns
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用于荧光开启H2S气体传感和防伪图案的金属有机框架薄膜

DOI:
10.1007/s40843-019-9457-5
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发表时间:
2019-06
期刊:
Science China Materials
影响因子:
--
通讯作者:
Guodong Qian
Guodong Qian
中科院分区:
其他
文献类型:
--
作者:
Jun Zhang;Fang Liu;Jiulin Gan;Yuanjing Cui;Bin Li;Yu Yang;Guodong Qian

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硫化氢(H2S)是一种常见的空气污染物,在各种工业过程中产生。因此,实时检测H2S至关重要。许多荧光传感器被报道用于检测溶液中的H2S;然而,气态H2S的荧光传感尚未见报道。在这项工作中,我们利用后功能化荧光膜MIL-100(In)@Eu3+/Cu2+薄膜,首次实现了室温下气态H2S的荧光开启传感,检测限低至0.535 ppm,与一些报道的S2 -离子荧光探针和基于半导体的气态H2S传感器相当。由于H2S对Cu2+有很强的亲和力,设计了该传感器。随着cu的形成,配体与Eu3+之间的“天线效应”恢复,导致Eu3+发射荧光开启。此外,我们还提出了一种利用MIL-100(In)薄膜内异常光滑的表面和不协调的羧酸基,利用镧系离子油墨实现多色防伪图案的新方法。
Hydrogen sulphide (H2S) is a common air pollutant, which is produced in various industry processes. Therefore, it is of crucial importance to detect H2S in real time. Many fluorescent sensors were reported aiming at detecting H2S in solution; however, the fluorescence sensing of gaseous H2S has not yet been reported. In this work, we utilized the post-functionalized fluorescent film, MIL-100(In)@Eu3+/Cu2+ film, realizing fluorescence turn-on sensing of gaseous H2S at room temperature for the first time with the limit of detection as low as 0.535 ppm, which is comparable to some reported fluorescent probes for S2− ions and semiconductor based gaseous H2S sensors. The sensor was designed due to the strong affinity of H2S with Cu2+. With the formation of CuS, the “antenna effect” between the ligand and Eu3+ recovered, resulting in the fluorescence turn-on of Eu3+ emission. Additionally, we proposed a new method to realize multi-colour anti-counterfeiting patterns with lanthanide ions ink, taking advantage of the extraordinary smooth surface and uncoordinated carboxylate groups within the MIL-100(In) film.
通过邻叠氮基甲基苯甲酰基-香豆素缀合物的还原揭露来荧光检测硫化氢。
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