Near-infrared-absorbing composition, near-infrared-absorbing film, and image sensor for solid-state imaging device
一种近红外线、吸收性的技术，应用在分散稳定性优异的近红外线吸收性组领域，能够解决铜络合物分散性分散稳定性(耐湿性不充分等问题，达到近红外光吸收能力优异、耐湿性提高的效果
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Embodiment 1
[0340] "Preparation of Near Infrared Absorbing Composition"
[0341] (Preparation of near infrared absorbing composition 1)
[0342] According to the following method, near-infrared-absorbing composition 1 was prepared.
[0343] 16.54 g of copper acetate and 661.46 g of tetrahydrofuran (abbreviation: THF) as a solvent were mixed, the copper acetate was dissolved using an ultrasonic irradiation machine, and the insoluble copper acetate was removed by filtration to obtain 678 g of a copper acetate solution.
[0344] Next, to 678 g of this copper acetate solution, a solution obtained by dissolving 43.86 g of Exemplary Compound 1 of the present invention in 80.0 g of THF was added while stirring for 30 minutes, and after stirring at room temperature for 16 hours, 238.97 g of toluene was added. , 251.0 g of near-infrared-absorbing composition 1 was prepared by volatilizing THF as a solvent in an environment of 55 to 90° C. for 3 hours so that the solid content became 10% by mass. ...
Embodiment 2
[0422] "Quantitative Amount of Acetic Acid"
[0423] Toluene and ultrapure water were added to the near-infrared-absorbing compositions 1 to 27 prepared in Example 1, and vibrated and stirred for 10 minutes, and then the water layer was separated by centrifugation, filtered through a 0.45 μm filter, and then filtered using a capillary tube. An electrophoresis device (CAPI-3300 manufactured by Otsuka Electronics Co., Ltd.) detected acetate ions, and the content (mole) was quantified based on a calibration curve.
[0424] Next, the content (mol %) of the acetic acid contained in the near-infrared-absorbing composition measured separately (using ICP emission spectrometry) was obtained relative to the metal (mol), and as a result, it was confirmed that near-infrared-absorbing compositions 1 to All of 27 are in the range of 1 to 100 mol%.
[0425]
[0426] An example of the measurement results of the amount of acetic acid obtained by the method described above is shown below.
...
Embodiment 3
[0430] For the near-infrared-absorbing composition 19 prepared in Example 1, the solvent was distilled off so that the solid content concentration thereof became 20 mass%, 30 mass%, and 35 mass%, and near-infrared-absorbing compositions 19-a and 19 were prepared. -b and 19-c, as a result of visual observation of their appearance, the near-infrared-absorbing compositions 19, 19-a, and 19-b were in the form of a rippling solution, but it was confirmed in the near-infrared-absorbing composition 19-c that Thixotropy, confirmation of viscosity increase.
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