Preparation of novel lanthanide complexes with hindered amine via solid-state reaction and preliminary evaluation of their efficiency as light stabilizers
Preparation of novel lanthanide complexes with hindered amine via solid-state reaction and preliminary evaluation of their efficiency as light stabilizers
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DOI：
10.1002/app.31998
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发表时间：
2010-07
影响因子：
3
通讯作者：
Tao Yang;Jiachun Feng
中科院分区：
文献类型：
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作者：
Tao Yang;Jiachun Feng
本研究首次以氯化镧和二-（2,2,6,6-四甲基-4-哌替啶基）癸烷二酸为原料，采用无溶剂固相反应合成了一系列具有低分子量阻碍胺的镧系配合物。元素和热分析表明，配合物的成分为LnLCl3 2H2O （Ln¼Y, La, Nd, Sm, Eu, Gd, Dy, Er）。红外光谱表明，镧系离子与配体中羰基的氧原子配位。采用熔融共混和压缩成型的方法制备了含配体和配合物的聚丙烯薄膜，并在乙醇提取前后进行紫外辐照。羰基指数、热分解温度和断裂拉伸伸长率的测量表明，与单独的配体相比，这些配合物具有相当的光稳定效率和更好的抗萃取性。本研究表明，阻胺镧系配合物为制备廉价高效的光稳定剂提供了新的途径。[C] 2010。应用化学学报（英文版）17 (2):444 - 444,2010
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)-decane- dioicacid (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 ¼ 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 pre- pared 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 pho- tostabilizing efficiency and improved extraction resist- ance compared to the ligand alone. This study suggests that hindered-amine lanthanide complexes can provide novel approach to the cheap and efficient light stabil- izers. V C 2010 Wiley Periodicals, Inc. J Appl Polym Sci 117: 250-258, 2010