762276-47-1Relevant academic research and scientific papers
Preparation method and application of heptamethine benzo indole cyanine dye
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Paragraph 0146-0150, (2020/09/23)
The invention discloses a preparation method and application of a heptamethine benzo indole cyanine dye, and belongs to the field of polymethine indole cyanine dyes and preparation thereof. The methodcomprises the following steps: 1) carrying out a heating reaction on raw materials containing a 2,3,3-trimethyl-4,5-benzoindole derivative and a nucleophilic substituted compound under a vacuum condition to obtain an organic ammonium salt; and 2) carrying out a heating reaction on a solution containing the organic ammonium salt obtained in the step 1) and a cycloalkene derivative under a closed condition, wherein the structural formula of the heptamethine benzo indole cyanine dye is represented by a formula (I). According to the invention, the dye has near-infrared light absorption and fluorescence development performances and can be used as a probe auxiliary agent; and the method has the advantages of short synthesis route, environment-friendly solvent, simple process, avoidance of noblemetal catalysis, high yield, high product purity and the like, is high in applicability, and can be used for synthesizing products of various structure types.
Heptamethine benzoindocyanine dye and preparation method and application thereof
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Paragraph 0107-0111, (2019/06/27)
The invention discloses a heptamethine benzoindocyanine dye and a preparation method and application thereof. The heptamethine benzoindocyanine dye contains an aliphatic chain substituted N structure,and has or independently has near-infrared light absorption and fluorescent development functions. The preparation method is short in synthetic route, simple in process, free of catalysis of preciousmetal, high in yield and large in single reaction amount, the preparation efficiency of the dye is greatly improved, and low-cost batch production can be realized. The dye and the preparation methodhave great significance in the aspects of production and application research of heptamethine benzoindocyanine.
Infrared dyes for laser marking
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Paragraph 0205, (2014/05/07)
Infrared dyes soluble in methylene chloride and having an infrared absorption maximum above 1100 nm are disclosed which have minor discolouration in the visual spectrum. The infrared dyes are especially useful for producing multicolour laser marked securi
INFRARED DYES FOR LASER MARKING
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Paragraph 0204, (2014/05/07)
Infrared dyes soluble in methylene chloride and having an infrared absorption maximum above 1100 nm are disclosed which have minor discolouration in the visual spectrum. The infrared dyes are especially useful for producing multicolour laser marked security documents having reduced background discoloration and enhanced colour gamut.
