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Preparation of novel lanthanide complexes with hindered amine via solid-state reaction and preliminary evaluation of their efficiency as light stabilizers

Authors

  • Tao Yang,

    1. Key Laboratory of Molecular Engineering of Polymers of Ministry of Education, Department of Macromolecular Science and Laboratory of Advanced Materials, Fudan University, Shanghai 200433, People's Republic of China
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  • Jiachun Feng

    Corresponding author
    1. Key Laboratory of Molecular Engineering of Polymers of Ministry of Education, Department of Macromolecular Science and Laboratory of Advanced Materials, Fudan University, Shanghai 200433, People's Republic of China
    • Key Laboratory of Molecular Engineering of Polymers of Ministry of Education, Department of Macromolecular Science and Laboratory of Advanced Materials, Fudan University, Shanghai 200433, People's Republic of China
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Abstract

In this research, a series of lanthanide complexes with a low molecular weight hindered amine have been synthesized for the first time from lanthanide chloride and bis-(2,2,6,6-tetramethyl-4-piperidinyl)-decanedioicacid (L) by simply using a solvent-free solid-state reaction. Elemental and thermo analysis suggest that the component of the complexes is LnLCl3 2H2O (Ln = Y, La, Nd, Sm, Eu, Gd, Dy, Er). Infrared spectra indicate that the lanthanide ions are coordinated with oxygen atoms of the carbonyl group in ligand. Polypropylene films containing the ligand and complexes were prepared by melt blending and compression molding, and were exposed to UV irradiation before and after ethanol extraction. The measurements of carbonyl index, thermal decomposition temperature, and tensile elongation at break reveal that these complexes have comparable photostabilizing efficiency and improved extraction resistance compared to the ligand alone. This study suggests that hindered-amine lanthanide complexes can provide novel approach to the cheap and efficient light stabilizers. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010

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