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Pyrene derivative-functionalized mesoporous silica–Cu2+ hybrid ensemble for fluorescence “turn-on” detection of H2S and logic gate application in aqueous media


The ensemble system PyH-SBA-15-Cu2+ was obtained via coordination interaction of pyrene derivative-functionalized mesoporous SBA-15 and Cu2+, and applied for the selective and sensitive detection of H2S over pH 6.0–12.0 in aqueous media. The sensing strategy was designed on the basis of the H2S-induced dissolution of Cu2+ from PyH-SBA-15-Cu2+. Cu2+ has good binding affinity to N atoms in PyH-SBA-15; therefore, the organic–inorganic hybrid ensemble PyH-SBA-15-Cu2+ was formed, which is nonfluorescent in aqueous solution because of the Cu2+-promoted emission quenching of PyH-SBA-15. The addition of H2S induces the dissolution of PyH-SBA-15-Cu2+ by the formation of stable CuS, thereby producing fluorescence revival of PyH-SBA-15. The correlative “turn-on” fluorescence signals of this ensemble system are linearly proportional to [H2S] in the concentration region of 0–1.0 × 10−4 M, showing a low detection limit of 3.7 × 10−7 M. Other common anions do not induce distinct fluorescence changes. When using the fluorescence intensity signal changes of PyH-SBA-15 as outputs and Cu2+ and S2− as inputs, PyH-SBA-15 can act as an XNOR logic gate.

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This work was supported by the National Natural Science Foundation of China (NSFC) (Grant Nos. 21567002, 31560014, 21966006), the Natural Science Foundation of Guangxi Province (Grant No. 2018GXNSFAA050015), and the Hundred-Talent Program of Guangxi Province.

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Correspondence to Hai-Bo Liu.

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Liu, H., Liang, Y., Liang, J. et al. Pyrene derivative-functionalized mesoporous silica–Cu2+ hybrid ensemble for fluorescence “turn-on” detection of H2S and logic gate application in aqueous media. Anal Bioanal Chem 412, 905–913 (2020). https://doi.org/10.1007/s00216-019-02302-2

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  • Ensemble
  • Fluorescence
  • Mesoporous silica
  • Pyrene
  • Cu2+
  • Logic gate