Abstract
A praseodymium complex, [Pr(IA)2(H2O)4] nnCl (1) (HIA = isonicotinic acid), has been prepared via a solvothermal reaction and characterized by single crystal X-ray diffraction. The praseodymium ion is coordinated by eight oxygen atoms to form a slightly distorted square antiprismatic geometry. Complex 1 is characteristic of a one-dimensional (1 D) chain-like structure. Solid-state photoluminescence spectra reveal that complex 1 has an emission at 660 nm of the red region. This emission is probably ascribed to the characteristic emission 3 P 0→3 F 2 transition of the praseodymium ions. Compound 1 has CIE (Commission Internationale de I'Éclairage) chromaticity coordinates of (0.5328, 0.4653). The CCT (Correlated Color Temperature) is 2180 K for compound 1. Solid-state UV/vis diffuse reflectance spectrum reveals that complex 1 possesses a wide optical band gap of 5.08 eV.
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