The Synthesis and Properties of UV-LED Sensitive Coumarin-carbazole-based Oxalate Photoinitiators

doi:10.7517/issn.1674-0475.190613

Abstract

Abstract: In this paper, two coumarin-carbazole based oxalate photoinitiators (2-OAME and 4-OAME) were designed and synthesized. By introducing the coumarin into carbazole group, the π-conjugated structure is enlarged, resulting to the good absorption properties in UV-visible light range. The photophysical and photochemical properties were characterized by UV-Vis absorption spectra and FT-RTIR. The two photoinitiators exhibit excellent light absorption properties in the near UV-Vis range and have good photoinitiated polymerization ability under excitation by the LED light source. The 4-OAME molecule exhibited better photoinitiated polymerization ability under the same conditions than 2-OAME. The two photoinitiators have great application potential in the field of near-ultraviolet-visible LED photopolymerization.

Key words: coumarin-carbazole, oxalate, photoinitiator, UV-LED

ZHOU Ruchun, LIU Yizhuo, CHEN Shixiong, WANG Weijie, CHEN Siqi, JIN Ming. The Synthesis and Properties of UV-LED Sensitive Coumarin-carbazole-based Oxalate Photoinitiators[J]. Imaging Science and Photochemistry, 2019, 37(5): 402-414.

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