Turn-up Luminescent Sensing of Ultraviolet Radiation by Lanthanide Metal-Organic Frameworks.
Sida ZhangLixi ChenJian XieYugang ZhangFeng HuangXia WangKai LiFuwan ZhaiQian YangLanhua ChenYa-Xing WangXing DaiZhifang ChaiShu-Ao WangPublished in: Inorganic chemistry (2022)
Here, we report a series of two-dimensional lanthanide metal-organic frameworks Ln-DBTPA (where DBTPA = 2,5-dibromoterephthalic acid and Ln = Tb ( 1 ), Eu ( 2 ), or Gd ( 3 )) showing a unique turn-up responsiveness toward ultraviolet (UV) radiation. The luminescence enhancement was derived from the accumulated radicals that can promote the intersystem crossing process. The compound 1 shows an ultralow detection limit of 9.1 × 10 -9 J toward UV radiation, representing a new type of luminescent UV detectors.