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普通的FTIR搜索不支持確定的化合物級別鑑定,但化學上最一致的方向是矽氧烷或聚矽氧烷類材料。該方向主要基於Top-15譜庫模式,其中包含多個矽氧烷和矽酮條目,以及樣品在約1014和1259 cm⁻¹處的譜帶,這些譜帶與Si–O–Si / Si–O–C區域和Si–CH3相關吸收一致。然而,譜庫匹配質量實際上不存在,沒有直接參考確認,並且3359–3372 cm⁻¹附近的高波數譜帶引入了簡單的矽酮流體無法很好解釋的不確定性
建議的下一步: Recollect the FTIR spectrum on a clean, dry sample and verify whether the 3359–3372 cm⁻¹ bands persist; disappearance would support moisture or surface contamination rather than a true sample functional group. Inspect the fingerprint region for stronger confirmation of silicone features, especially the full Si–O–Si envelope and characteristic methyl-on-silicon bands, using a higher-quality spectrum if possible. If available, compare against authenticated PDMS/silicone oil or silicone rubber reference spectra measured under the same conditions. Use complementary analysis such as GC-MS for volatile siloxanes or Raman/elemental screening for silicon to distinguish between a small siloxane molecule and a polymeric silicone material.
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