wherein R1a and R1b may be the same or different, and each independently represent an alkyl group, an aryl group, or a heteroaryl group; R2 and R3 each independently represent a hydrogen atom or a substituent, and at least one of R2 and R3 is an electron withdrawing group; R2 may be bonded to R3 to form a ring; and R4 represents a hydrogen atom, an alkyl group, an aryl group, a heteroaryl group, a substituted boron, or a metal atom, and R4 may be covalently bonded or coordinately bonded to at least one among R1a, R1b and R3."/>
Near-infrared absorptive composition, near-infrared absorptive coated material, near-infrared absorptive liquid dispersion, near-infrared absorptive ink, printed material, and near-infrared absorptive image-forming composition
A near-infrared absorptive liquid dispersion, which contains a near-infrared absorptive compound represented by formula (1) that is dispersed in a form of fine particles in a dispersing medium:wherein R1a and R1b may be the same or different, and each independently represent an alkyl group, an aryl group, or a heteroaryl group; R2 and R3 each independently represent a hydrogen atom or a substituent, and at least one of R2 and R3 is an electron withdrawing group; R2 may be bonded to R3 to form a ring; and R4 represents a hydrogen atom, an alkyl group, an aryl group, a heteroaryl group, a substituted boron, or a metal atom, and R4 may be covalently bonded or coordinately bonded to at least one among R1a, R1b and R3.
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机译：一种近红外吸收性液体分散体，其包含以细颗粒形式分散在分散介质中的由式（1）表示的近红外吸收性化合物： <图像文件=“ IMGA0001.GIF” he =“ 39” imgContent =“ chem” imgFormat =“ GIF” wi =“ 82” /> 其中R 1a 和R 1b 可以相同或不同，分别独立地表示烷基，芳基或杂芳基。 R 2 和R 3 分别独立地表示氢原子或取代基，并且R 2 和R 3 < / Sup>是吸电子基团; R 2 可以与R 3 结合形成环; R 4 代表氢原子，烷基，芳基，杂芳基，取代的硼或金属原子，并且R 4 可以共价键合或与R 1a ，R 1b 和R 3 中的至少一个键合。
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