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Long-Wavelength Fluorescent Chemosensors for Hg²⁺ based on Pyrene.

ABSTRACT: A novel long-wavelength turn-on fluorescent chemosensor CS based on pyrene was synthesized to detect Hg²⁺. In the presence of other metal ions, CS could effectively recognize Hg²⁺ and produce the turn-on fluorescent emission at 607 nm. Also, the absorption spectrum exhibited red-shift. Meanwhile, the change of the solution color from yellow to orange was directly observed by the naked eye. The interaction between CS and Hg²⁺ was confirmed by the Job's plot, electrospray ionization mass spectrometry, scanning electron microscopy, and density functional theory calculations. It was found that the fluorescence of CS could be reversible when I^- was added into the solution of CS and Hg²⁺. CS illustrated high selectivity and good sensitivity for Hg²⁺ with the limit of detection of 36 nm. Moreover, CS could be utilized as test strips and silica gel plates to identify Hg²⁺.

SUBMITTER: Bai CB

PROVIDER: S-EPMC6740181 | biostudies-literature | 2019 Sep

REPOSITORIES: biostudies-literature

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Long-Wavelength Fluorescent Chemosensors for Hg2+ based on Pyrene.

Bai Cui-Bing CB Xu Peng P Zhang Jie J Qiao Rui R Chen Meng-Yu MY Mei Meng-Yun MY Wei Biao B Wang Chang C Zhang Lin L Chen Shui-Sheng SS

ACS omega 20190829 11

A novel long-wavelength turn-on fluorescent chemosensor CS based on pyrene was synthesized to detect Hg2+. In the presence of other metal ions, CS could effectively recognize Hg2+ and produce the turn-on fluorescent emission at 607 nm. Also, the absorption spectrum exhibited red-shift. Meanwhile, the change of the solution color from yellow to orange was directly observed by the naked eye. The interaction between CS and Hg2+ was confirmed by ...[more]

PMID: 31528817

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