The design, synthesis, and optical characterization of refractive-index-contrast (RIC) triazine-based poly(phenylene sulfide)s (PPSs) are investigated. Indeed, novel PPSs with two pendant groups, either tert-butyl (^tBu) ester or carboxylic acid groups, at each monomer repeating unit (PPS-2E or PPS-2CA, respectively) were successfully synthesized. PPS-2CA showed high refractive index (n) values of 1.6964 (633 nm) and 1.6714 (940 nm) as well as high δn (increase in the n value by the deprotection of PPS-2E) values of +0.062 (633 nm) and +0.058 (940 nm).

中文翻译：

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单/双侧链羧酸部分的碱溶性三嗪基聚苯硫醚的合成及其在折射率对比材料中的应用

研究了折射率对比（RIC）三嗪基聚苯硫醚（PPS）的设计，合成和光学特性。实际上，已经成功合成了在每个单体重复单元（分别为PPS-2E或PPS-2CA）具有两个侧基的叔丁基（^t Bu）酯或羧酸基团的新型PPS 。PPS-2CA的高折射率（n）值为1.6964（633 nm）和1.6714（940 nm）以及较高的δn（由于PPS-2E脱保护而使n值增加）+0.062（633 nm） ）和+0.058（940 nm）。