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发明授权
CN109232397B 一种可通过水洗重复利用的碱性精密pH试纸及其制备方法和应用 有权

一种可通过水洗重复利用的碱性精密pH试纸及其制备方法和应用
摘要：
本发明涉及一种可通过水洗重复利用的碱性精密pH试纸及其制备方法和应用，属于比色分析检测技术领域，提供了式Ⅰ所示的化合物，4’‑对‑羟基偶氮苯基‑2,2’:6’2”‑三联吡啶，式Ⅰ所示的化合物的制备方法，先制备得到4’‑硝基‑2,2’:6’2”‑三联吡啶，再由其制备得到4’‑氨基‑2,2’:6’2”‑三联吡啶，再和苯酚反应得到4’‑对‑羟基偶氮苯基‑2,2’:6’2”‑三联吡啶，式Ⅰ所示的化合物作为探针分子制备了一种碱性精密的pH试纸，能够检测水相pH 11‑14范围内变化。
摘要（英）：

The invention relates to alkaline precise pH test paper reusable by water washing, a preparation method and an application thereof, belongs to the technical field of colorimetric analysis and detection, and provides a compound 4'-p-hydroxyazophenyl-2,2':6'2''-terpyridine shown in a formula I which is described in the specification, and a preparation method thereof. The preparation method comprisesthe following steps of: firstly preparing and obtaining 4'-nitro-2,2':6'2''-terpyridine, then using the 4'-nitro-2,2':6'2''-terpyridine to prepare and obtain 4'-amino-2,2':6'2''-terpyridine, and thenreacting with phenol to obtain 4'-p-hydroxyazophenyl-2,2':6'2''-terpyridine. The compound shown in the formula I is used as a probe molecule to prepare the alkaline precise pH test paper which can beused for detecting the change of an aqueous phase in the pH range 11-14.

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