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FTIR 譜圖與含有強酯羰基和多個 C-O 伸縮譜帶的含氧有機材料最為一致。樣品在 1734 cm⁻¹ 顯示明顯譜帶,並伴隨 1239、1203、1097 和 1017 cm⁻¹ 的強特徵峰,支持酯和/或醚類鍵結;2872、1453 和 1371 cm⁻¹ 的脂肪族 C-H 譜帶則指示含甲基烷基。儘管最近的譜庫標籤是 1-甲氧基丙-2-基乙酸酯,但檢索信度實際上不存在,且前 15 名候選物化學組成混雜,涵蓋乙酸酯溶劑、甲氧基羰基化合物以及丙烯酸或甲基丙烯酸聚合物。根據現有證據,最安全的結論是較廣泛的含氧酯/醚有機方向,而非固定指派到單一命名化合物。
建議的下一步: Compare the full spectrum, especially the 1300-900 cm-1 region, against authenticated spectra of 1-methoxypropan-2-yl acetate and common acrylate/methacrylate ester materials. Check for volatility or residue behavior: rapid evaporation with loss of the FTIR signal would support a solvent-like acetate, whereas a persistent film would support a polymeric or resinous ester component. Acquire complementary GC-MS if the sample is volatile, or pyrolysis-GC-MS if it is a residue or coating, to distinguish a small oxygenated solvent from an acrylate or polyester material. If silicon-containing material is still suspected, obtain a higher-quality spectrum and inspect for the characteristic intensity pattern of Si-O-Si and Si-CH3 bands relative to the ester carbonyl.
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