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Recently, the optical application of coordination polymers (CPs) has received increasing attention. In this paper, two novel Pb(II)-CPs were successfully synthesized under solvothermal conditions. Single-crystal diffraction analysis shows that compound 1 is an orthorhombic crystal system in the Pbca space group, and compound 2 is a monoclinic crystal system in the C2/c space group. Furthermore, we characterized compounds 1 and 2 by powder X-ray diffraction, infrared spectroscopy, solid-state UV-visible absorption spectroscopy and elemental analyses. The optical properties of compounds 1 and 2 were studied in depth, with compound 1 exhibiting yellow luminescence and compound 2 exhibiting blue luminescence. In addition, we mixed compound 1 with a commercial blue phosphor to obtain a white light-emitting diode (WLED) with adjustable correlated color temperature (CCT) and color rendering index (CRI). Therefore, the results suggest that Pb(II)-CPs have potential applications in the WLED field.

Graphical abstract: Two novel emissive Pb(ii) coordination polymers: syntheses, structures, properties and WLED application

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