一种乙硫醇功能化聚噻吩作为光学探针，用于灵敏快速检测有机溶剂中的含水量。
An ethanethioate functionalized polythiophene as an optical probe for sensitive and fast detection of water content in organic solvents.
机构信息
School of Materials Science & Engineering, Tianjin Key Laboratory for Photoelectric Materials and Devices, Key Laboratory of Display Materials & Photoelectric Devices, Ministry of Education, Tianjin University of Technology, Tianjin 300384, China.
College of Chemistry, Nankai University, Tianjin 300071, China.
出版信息
Anal Methods. 2021 Sep 2;13(34):3792-3798. doi: 10.1039/d1ay00967b.
A new polythiophene-based optical probe, namely PTS, was designed and prepared for detection and quantification of the water present in organic solvents. PTS exhibited sensitive and fast absorption and fluorescence signaling response to the changes of water content in tetrahydrofuran (THF), ,-dimethylformamide (DMF) and ,-dimethylacetamide (DMAc) due to the water-induced interpolymer-stacking aggregation as demonstrated by dynamic light scattering (DLS) analysis. The fluorescence intensity of PTS at 550 nm linearly reduced as a function of the water content in detection ranges of 0-30% (v/v) in THF, 0-10% in DMF and 0-10% in DMAc with the limit of detection (LOD) for water being 0.034% (v/v) in THF, 0.013% (v/v) in DMF, and 0.014% (v/v) in DMAc, respectively. Additionally, PTS-incorporated test paper was fabricated to successfully achieve naked-eye detection of water in DMF and DMAc. PTS was further applied to estimate the water content in real samples, convincingly demonstrating that our method was comparable with the standard Karl Fischer titration.
一种新型聚噻吩基光学探针 PTS 被设计并制备用于检测和定量有机溶剂中的水。由于水诱导的聚合物间堆积，PTS 在四氢呋喃（THF）、N，N-二甲基甲酰胺（DMF）和 N，N-二甲基乙酰胺（DMAc）中对含水量的变化表现出灵敏和快速的吸收和荧光信号响应，这一点通过动态光散射（DLS）分析得到证实。PTS 在 550nm 处的荧光强度随检测范围内 THF 中 0-30%（v/v）、DMF 中 0-10%和 DMAc 中 0-10%的含水量呈线性降低，THF 中检测水的检出限（LOD）为 0.034%（v/v），DMF 中为 0.013%（v/v），DMAc 中为 0.014%（v/v）。此外，还制备了含有 PTS 的试纸，成功实现了对 DMF 和 DMAc 中水分的肉眼检测。PTS 进一步用于估计实际样品中的水分含量，令人信服地证明了我们的方法与标准卡尔费休滴定法相当。
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