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High-Efficiency Synthesis and Properties of Latent Pigment Red 272DPP-BOC by Microwave Irradiation
Department of Applied Chemistry, Faculty of Engineering, Shibaura Institute of Technology, Tokyo, Japan
Department of Applied Chemistry, Faculty of Engineering, Shibaura Institute of Technology, Tokyo, Japan
Department of Chemistry, Aichi University of Education, Kariya, Japan
Nuclear Science and Engineering Center, Sector of Nuclear Science Research, Japan Atomic Energy Agency, Naka-gun, Ibaraki, Japan
Nuclear Science and Engineering Center, Sector of Nuclear Science Research, Japan Atomic Energy Agency, Naka-gun, Ibaraki, Japan
- 1 Department of Applied Chemistry, Faculty of Engineering, Shibaura Institute of Technology, Tokyo, Japan
- 2 Department of Applied Chemistry, Faculty of Engineering, Shibaura Institute of Technology, Tokyo, Japan
- 3 Department of Chemistry, Aichi University of Education, Kariya, Japan
- 4 Nuclear Science and Engineering Center, Sector of Nuclear Science Research, Japan Atomic Energy Agency, Naka-gun, Ibaraki, Japan
- 5 Nuclear Science and Engineering Center, Sector of Nuclear Science Research, Japan Atomic Energy Agency, Naka-gun, Ibaraki, Japan
Materials Sciences and Applications·Volume 11 (2020)·Pages 195–203·Published 3 March 2020·DOI10.4236/msa.2020.113013
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Abstract
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.
KeywordsLatent PigmentDiketopyrrolopyrrolPigment Red 272High Efficiency SynthesisMicrowave IrradiationSingle-Crystal X-Ray Analysis
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