A highly selective and sensitive Eu@Cd-coordination polymer luminescent sensor for detecting Fe3+

In this paper, a new cadmium fluorescent coordination polymer (Cd-CP) was synthesized under a solvothermal reaction of Cd(HO3)(2)center dot 4H(2)O and 4-pyrimidine-5-ylbenzoic acid. In the Cd-CP, the adjacent [CdL2(H2O)(4)] fragments are connected by pi center dot center dot center dot pi interactions between benzene rings and various H-bondings, further extending its structure to three-dimensional supermolecule network. Furthermore, Cd-CP was further converted to Eu@Cd-CP by Eu3+ doping, luminescent sensing experiments show that the Eu@Cd-CP exhibits highly sensitive and selective detection for Fe3+ with good recyclability, the quenching constant K-sv reaches to 1.871 x 10(5) M-1 and correlation coefficient R-2 = 0.99393. The detection mechanisms of the fluorescent Eu@Cd-CP for Fe3+ were also further studied by various spectroscopies.

Automated summary

This paper reported the synthesis of a new cadmium fluorescent coordination polymer (Cd-CP), which was further converted to Eu@Cd-CP for highly sensitive and selective detection of Fe3+ with good recyclability. The detection mechanisms of Eu@Cd-CP for Fe3+ were studied using various spectroscopies.