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目前的FTIR結果不支持確定的化合物級別鑑定。雖然最近的譜庫條目是7-氧雜雙環[4.1.0]庚-5-酮,但匹配質量實際上無區分性,且更廣泛的譜庫模式較弱。測量譜圖更安全地描述為具有脂肪族或甲基特徵的小型含羰基有機材料,而可能的腈貢獻仍為暫定而非確定。
建議的下一步: Re-measure the sample over the full mid-IR range with attention to the 2210-2260 cm-1 region to check specifically for a nitrile band. Inspect the 2800-3100 cm-1 region for C-H stretching pattern and the 3200-3600 cm-1 region for any O-H or N-H absorption, which would help separate ketone/ester/lactone from amide or alcohol-containing candidates. If enough sample is available, confirm the carbonyl type by GC-MS or LC-MS and compare against small oxygenated organic compounds rather than relying on the current weak FTIR library hit. If this is a formulation or extract rather than a pure compound, consider chromatographic separation before repeat FTIR, because mixed components can produce this kind of non-specific library outcome.
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Evidently, this substance is a polymer containing ester groups and long-chain CH2 groups. Further analysis will be provided in a subsequent response.
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