Palladium Coordination Polymers Nanosheets: New Strategy for Sensitive Photothermal Detection of H₂S

Abstract

New strategies for portable detection of highly toxic environmental pollutants are still in urgent need. Here, through Pd 2+ and methylene blue (MB) coordination, photothermal two-dimensional palladium coordination polymers nanosheets (2D PdCPsNSs) have been synthesized for sensitive photothermal detection of H 2 S. The sensing mechanism is based on the decomposing effect of H 2 S to 2D PdCPsNSs, accompanied by the decrease of PdCPsNSs concentration and the increase of MB concentration. Upon H 2 S addition, the heat released from the 2D PdCPsNSs under 808 nm lasers irradiation decreased, and the heat released from the MB increased under 650 nm lasers irradiation, respectively. Such temperature change signals could be easily detected by a portable thermometer. The 2D PdCPsNSs showed highly sensitive ratiometric response to H 2 S with a detection limit of 30 nM. In addition, such probe presents an excellent selective ratiometric response to H 2 S relative to other anionic species and thiols because of the specific interaction between Pd 2+ and H 2 S. Moreover, the probe was suitable for the ratiometric determination of H 2 S in different actual water samples, providing a promising platform for convenient, stable, and universal analysis of H 2 S.

2D Palladium Sulphate for Visible‐Light‐Driven Optoelectronic Reversible Gas Sensing at Room Temperature

“…The characteristic main peaks located at binding energies of ≈336.6 and ≈341.8 eV correspond to Pd 3 d 5/2 and Pd 3 d 3/2 , respectively. [ 43–45 ] The high‐resolution O 1 s spectrum shown in Figure 2b is fitted by two components. The peak at binding energy of ≈531.6 eV can be assigned to SO 4 which is matching well with other sulphate groups with the value of 531.6 eV, 531.7 eV for aluminum sulphate Al 2 (SO 4 ) 3 and cadmium sulphate (CdSO 4 ), respectively.…”

Spatiotemporally controlled O2 and singlet oxygen self-sufficient nanophotosensitizers enable the in vivo high-yield synthesis of drugs and efficient hypoxic tumor therapy

“…S7d †), revealing the coordination of the S atom with Pt 4+ . 37 Application of the Barrett-Joyner-Halenda (BJH) method showed a mainly mesoporous structure for the Pt/PtMBCPNSs (Fig. S8a †), with an average pore size of 4.2 nm (Fig.…”

A hydrogen sulphide-responsive and depleting nanoplatform for cancer photodynamic therapy

“…To date, the most commonly used methods for detection of H 2 S include high-pressure liquid chromatography 16 , gas chromatography 17 , electrochemical analysis 18 , and methylene blue assay 19 , etc. These approaches display great detecting sensitivity in the order of nanomole.…”