Dual Light-emitting Properties of Hydroxyl-terminated Poly(lactic acid) Based on Benzophenone Derivatives

作者：Rong Jiameng; Zhou Cao; Xu Dong; Sun Wei; Huang Xiaowen; Zhang Xingyuan^*

来源：Chemical Journal of Chinese Universities, 2016, 37(8): 1542-1550.

DOI：10.7503/cjcu20160326

• Benzophenone derivative
• Hydroxyl-terminated polylactic acid
• Fluorescence
• Room temperature phosphorescence
• Dual light-emitting property

Two kinds of benzophenone derivatives (4-[(2-hydroxyethyl) (methyl) amino] phenyl) benzophenone(NBP), (4-chlorophenyl) (4-[(2-hydroxyethyl) (methyl) amino] benzophenone (NBP-Cl), and a series of hydroxyl-terminated polylactic acid (PLA) with different molecular weight were prepared based on D,L-lactide polymerization. The structures and properties of NBP, NBP-Cl and PLA were characterized. Optical test results showed that the NBP and NBP-Cl only had fluorescence emission property at room temperature, however, PLA demonstrated fluorescence and phosphorescence dual light-emitting properties; the heavy atom effect enhanced the room temperature phosphorescence of PLA, but which decreased the phosphorescence lifetime; with the decrease of the molecular weight of PLA, the phosphorescence lifetime increased and then reduced. PLA thermal gravimetric analysis (TGA) data showed that this material had excellent thermal performance, which greatly broaden the applications of the dual light-emitting materials.

• 出版日期2016-8
• 单位中国科学技术大学