High-Efficiency Synthesis and Properties of Latent Pigment Red 272DPP-BOC by Microwave Irradiation

• 作者: Kiyohiko Nakajima Masayuki Watanabe Noboru Aoyagi Tomoji Ohishi Yu Kimura
• 来源期刊: 材料科学与应用期刊(英文)
• 学科: 化学
• 关键词: LATENT PIGMENT Diketopyrrolopyrrol PIGMENT RED 272 High Efficiency SYNTHESIS Microwave Irradiation SINGLE-CRYSTAL X-Ray Analysis
• 年，卷（期）: clkxyyyqkyw_2020,（3）
• 页码范围: 195-203
• 页数: 9页
• 分类号: O62

摘要

A high-efficiency synthesis method for a latent pigment of red pigment diketo-pyrrolo-pyrrole (Pig. Red 272:272DPP), which is important as a functional organic pigment, was investigated, and the investigation results revealed that irradiation of microwaves (MWs) for several seconds to 272 DPP in NMP (N-methyl-2-pyrrolidone) solvent yielded DPP latent pigment (272DPP-BOC) at a high yield of 86.2%. Two kinds of latent-pigment crystals, namely, red and yellow, were obtained by recrystallization, and it was found that the fluorescence-emission properties of the two kinds differ significantly. Single-crystal X-ray structural analysis showed that the difference in the fluorescence-emission properties of the two types is derived from the difference in their crystal structures.