Synthesis,structures and applications as fluorescence probes of novel Hg(II)/Ag(I) functional supramolecular compounds based on nitrogen heterocyclic cations

Abstract

Two new supramolecular polymers based on HgI_2, AgI and BPMB·2Br{BLMB = 1, 4-bis [(4-picoline)-N-methylene] benzene} have been synthesized via the self-assembly reaction in solution. They were {(BPMB)[HgI₄(H₂O)_0.66]}(1), and {(BPMB)₂[Ag₄I₈]}(2).We analyzed the structures of compounds 1–2 by X-ray single-crystal diffraction, infrared spectroscopy (IR) and characterized the properties of compounds 1–2 by fluorescence spectrum and ultraviolet-visible (UV-vis) absorption spectrum. The results indicated that compound 1 is the mononuclear structure; Compound 2 has the multinuclear cubane structure. Compounds 1–2 showed good photocatalytic abilities for methylene blue (MB) irradiated by visible light. The effective detection of Fe³⁺ was performed by compounds 1–2 as fluorescent sensors.

Keywords

Cationic templates supramolecularpolymer photocatalytic

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