A 1D Cd-coordination polymer containing serine derivative and its application in luminescence sensor for Tb(Ⅲ)

A novel chiral Cd-coordination polymer (CP1) was synthesized by solvothermal reaction with chiral ligand 1,4-bis((L‑serine)methyl)benzene (L-H2bsmb) and cadmium oxide, and the structure of CP1 was characterized by single-crystal X-ray diffraction, fourier transform infrared spectoscopy (FT-IR), powder X-ray diffraction (PXRD), thermogravimetric analysis (TGA), elemental analysis (EAs), solid circular dichroism (CD) and fluorescence spectroscopy. One dimensional chain for CP1 was constructed to a chiral 3D structure by intermolecular hydrogen bonds between carboxyl group and coordination water molecules and weak interaction of C‒H•••π. In aqueous system, the fluorescence of CP1 shows excellent stability. Through the detection experiments towards 32 different ions, it was found that CP1 has specific selection for Tb(Ⅲ) ions with the fast response time (within 1 min), low detection limit (11.4 nM), strong anti-interference ability and good recyclability. Fluorescent test strips based on CP1 allow to sense Tb(Ⅲ) ion quickly and easily by naked eyes, which provides an excellent method for monitoring Tb(Ⅲ) in human body and water systems.