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該光譜與含脂肪族酯的材料最一致,而非確定歸屬為譜庫最佳匹配。最強的樣品證據是接近1742 cm⁻1的強酯羰基譜帶,伴隨1235及1159 cm⁻1的C–O伸縮譜帶,以及2922、2852、1461、1374及721 cm⁻1的長烷基鏈模式。在領先的譜庫候選物中,化學一致的圖案主要由長鏈酯化合物(如脂肪酸酯、二元酯及相關含氧脂質樣材料)主導。然而,譜庫匹配品質實際上為零,且無直接或相關文獻證據特別支持樣品為十四烷二酸二乙酯。因此,更廣泛的酯類方向是化學上最可支持的結論。
建議的下一步: Re-run the FTIR with full-spectrum review and band intensities to confirm the ester C–O region and check for any overlooked bands that would distinguish monoester, diester, or hydroxyl-containing ester materials. Compare the sample against authenticated spectra of long-chain fatty esters and aliphatic diesters, including Diethyl tetradecanedioate, under the same measurement conditions. Use GC-MS or LC-MS, if the sample is extractable, to determine chain length distribution and whether the material is a single ester, a diester, or a mixture of fatty esters. If unsaturation is important to the application, verify the weak 3006 cm⁻1 feature with repeat FTIR or complementary NMR analysis.
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