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FTIR 圖譜支持廣泛歸屬於含氮和氧功能的雜環羰基有機化合物,而非具體的前 1 名譜庫分子的可辯護鑑定。樣品在 1752 和 1663 cm-1 處顯示強羰基吸收,2968 cm-1 附近有 C-H 伸縮,3541 cm-1 處的高波數譜帶與 O-H 或 N-H 伸縮一致,以及多個指紋區譜帶(1290 和 1168 cm-1)與 C-O 和/或 C-N 功能一致。這種總體化學性質與前 15 名譜庫模式相容,該模式反覆出現含氮和氧的雜環或富含醯胺/羧酸的化合物,但檢索本身非常薄弱,且無直接或相關文獻證據將結果縮小到指定的譜庫化合物。
建議的下一步: Obtain a higher-quality FTIR spectrum with baseline correction and confirm the exact shapes of the 3541, 1752, and 1663 cm-1 bands; this will help separate O-H, N-H, acid, amide, ester, and lactam contributions. Check for additional carbonyl-region structure between about 1800 and 1500 cm-1 at higher resolution to determine whether two distinct carbonyl functional groups are present. Acquire complementary Raman, MS, or NMR data to determine whether the sample contains a defined heterocyclic small molecule rather than a more general oxygenated/nitrogenated organic material. If chlorinated candidate structures remain of interest, use elemental analysis or XRF/EDS to test for chlorine before considering any chlorinated library entity.
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