A Novel Zr-MOF as Fluorescence Turn-On Probe for Real-Time Detecting H2 S Gas and Fingerprint Identification.

The development of fluorescence turn-on probes for selectively sensing toxic gases and visualization identification of fingerprints is significantly important for society security and human health. Here, Zr is used as the metal center and 1,3,6,8-tetra (4-carboxylphenyl) pyrene (TBAPy) and tetrakis(4-carboxyphenyl)porphyrin (TCPP) as double linkers to synthesize a novel Zr(TBAPy)5 (TCPP) material. Results indicate that Zr(TBAPy)5 (TCPP) can be used as a fluorescence turn-on probe for highly selective and sensitive detection of H2 S gas and its derivatives S2- in aqueous solutions with an extremely low concentration (≈1 ppb) and fast response time (<10 s). Moreover, by tailoring the particle size of samples, it is found that Zr(TBAPy)5 (TCPP) can efficiently achieve the visualization identification of fingerprints due to the fluorescence turn-on effect. All the results indicate that the Zr(TBAPy)5 (TCPP) is a promising multifunctional fluorescence turn-on probe.

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