Abstract
A series of dinuclear complexes with molar ratios of cerium to lanthanum of 1:0, 1:1, 1:2, 1:4, 1:7, 1:9 and 0:1 was synthesized using 5-sulfosalicylic acid (SSA) as the first ligand and 1,10-phenanthroline (Phen) as the second ligand, recorded as Ce1−x La x (SSA)3Phen (x = 0, 0·5, 0·67, 0·8, 0·875, 0·9, 1), and the complexes were blended with tricellulose acetate (TCA) to obtain luminescent polymer materials. The compositions and structures of the rare earth complexes were determined through elemental analysis, energy-dispersive X-ray analysis, infrared spectroscopy and thermogravimetric analysis. Under the optimum excitation wavelengths, all dinuclear complexes emitting blue light displayed the characteristic emission of the cerium (Ce3+) ion. The fluorescence spectra showed that the 85:15 TCA/Ce0·2La0·8(SSA)3Phen composite showed the strongest fluorescence among all composites and the quantum efficiency was calculated as 30·6%. The introduction of the lanthanum (La3+) ion into the cerium ion complex can effectively reinforce the luminescence intensity of the complex and be favorable for retaining the excellent fluorescence in the TCA matrix. The 85:15 TCA/Ce0·2La0·8(SSA)3Phen composite possesses fine luminescence properties and thermal stability for potential usage as a blue fluorescent material.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
