What absorbs at 1203 cm⁻¹ in an FTIR spectrum?
A band near 1203 cm⁻¹ can point to several functional groups. Below are the most likely assignments, ranked by how much published evidence supports each — every one traceable to literature (DOI) and cross-validated against our 130,000+ reference spectra and knowledge graph.
Backed by 8 cited sources
إجابة سريعة
A band near 1203 cm⁻¹ is usually interpreted by checking which functional groups repeatedly co-occur there in the literature, then confirming at least one or two additional peaks in the same sample. This page ranks those assignments by accumulated evidence rather than by a single fixed textbook rule.
تعيينات المجموعات الوظيفية المحتملة
| مجموعة وظيفية | حقائق داعمة | المصادر المستشهد بها | أعلى ثقة |
|---|---|---|---|
| C-O single bond | 8 | 7 | 1,0 |
| Hydroxyl (O-H) | 6 | 6 | 1,0 |
| Methoxy (OCH3) | 6 | 5 | 1,0 |
| Methacrylate | 6 | 5 | 1,0 |
| Acetate | 6 | 5 | 1,0 |
| Alkyl C-H | 3 | 3 | 1,0 |
| Phosphate (PO4) | 3 | 2 | 1,0 |
| C c single bond | 2 | 2 | 1,0 |
| Ring structure | 1 | 1 | 1,0 |
| Alkene (C=C) | 1 | 1 | 1,0 |
| Carbonyl (C=O) | 1 | 1 | 1,0 |
| Ester | 1 | 1 | 1,0 |
| Hydrogen bond | 1 | 1 | 1,0 |
| Phosphorus | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
| Carbohydrate | 1 | 1 | 1,0 |
يعكس الترتيب الأدلة الأدبية المتراكمة، وليس قاعدة واحدة موثوقة. تأكد دائمًا من سياق عينتك.
المواد المحتملة
| مادة | القمم الداعمة | المجموعات المتداخلة | المصادر المستشهد بها |
|---|---|---|---|
| chitosan | 1203, 1650, 1655 | Methacrylate, Hydroxyl (O-H), C-O single bond | 1 |
| Cellulose | 1203, 1735, 1650 | Methacrylate, C-O single bond, Hydroxyl (O-H) | 1 |
| GO | 1203, 1720, 1182 | Methacrylate, Hydroxyl (O-H), C-O single bond | 1 |
| RGO | 1203, 2358, 2930 | Methacrylate, Hydroxyl (O-H), C-O single bond | 1 |
تظهر المواد فقط عندما يدعم نفس مجموعة الأدبيات هذا النطاق وذروة مميزة إضافية واحدة على الأقل.
منطق الطيف
This band becomes meaningful only when read with its neighboring peaks. In practice, analysts first look at the assignments above, then check whether the same sample also shows other peaks expected for the same structural motif. A lone band near 1203 cm⁻¹ is usually not enough for material identification by itself.
الاستخدام في العالم الحقيقي
هذا النوع من الاستعلام شائع في تحديد البوليمر، وفحص البلاستيك غير المعروف، واستكشاف أخطاء مراقبة الجودة، والتحقق من المواد المعاد تدويرها، ومراجعة تعيين القمم المدعومة بالأدبيات.
الأخطاء الشائعة
- معالجة نطاق معزول واحد كدليل على المادة دون التحقق من ذروة داعمة واحدة أو اثنتين على الأقل.
- تجاهل التداخل: يمكن أن تساهم مجموعات وظيفية متعددة بالقرب من نفس رقم الموجة.
- تخطي التحقق من الصحة عندما قد تؤدي الإضافات أو الخلائط أو الأكسدة أو التلوث إلى تشويه الطيف.
نصيحة التحقق
عندما يبقى الغموض، تحقق من الفرضية باستخدام DSC أو GC-MS أو TGA، خاصة للمخاليط والعينات المتحللة والبوليمرات المملوءة.
الأدبيات وراء هذه التعيينات
-
Carbohydrate الثقة 1,0
“pennacea In addition, the band at 1203 is associated to oligo FTIR spectra of and corals and polysaccharide with C-O-C, C-O-P, P-O-P symsamples show the presence of chitin.”
Juarez-de la Rosa 等 - 2012 - Effects of thermal treatments on the structure of DOI: 10.1007/s10853-011-5878-9 -
Hydroxyl (O-H) الثقة 1,0
“All the bands attributed to 1203cm-1 OH bending at 1455, 1336 and are reduced in inten1035cm-1, related to sity.”
Characterization of depolymerized residues from extremely low acid hydrolysis (ELA) of sugarcane bagasse cellulose: Effects of degree of polymerization, crystallinity and crystallite size on thermal decomposition DOI: 10.1016/j.indcrop.2011.11.009 -
Acetate الثقة 1,0
“Moreover, the cm-1 peak at 1203 is due to the C-O-H vibrations.”
Reduced graphene oxide-intercalated graphene oxide nano-hybrid for enhanced photoelectrochemical water reduction DOI: 10.1007/s40097-019-00324-x -
Alkyl C-H الثقة 1,0
“The non-polarized FTIR spectrum of the red class depicted an increased absorbance of β-sheet structures (amide I: 1697 and 1634 cm-1) and bands at 1338, 1283, 1238, and 1203 cm-1 attributed to the δ(CH2), δ(CH3), ν(C-N), and δ(N-H) absorpti”
Fourier Transform Infrared Polarization Contrast Imaging Recognizes Proteins Degradation in Lungs upon Metastasis from Breast Cancer DOI: 10.3390/cancers13020162 -
Acetate الثقة 1,0
“Additional bands appear at 1203 and 3030 that refer to C-O-H bending and N-H stretching, respectively [15].”
Delgado-Mellado 等 - 2018 - Thermal stability of choline chloride deep eutecti DOI: 10.1016/j.molliq.2018.03.076 -
Phosphate (PO4) الثقة 1,0
“The bands at 1203, 1128, 1095, and 880 recorded in FTIR spectra ascribed to the phosphate groups (P=O, -PO 2, -PO 3, and P-O-P, respectively) confirmed the successful cross-linking between CS, MC, and STMP.”
Application of Vibrational Spectroscopic Techniques in the Study of the Natural Polysaccharides and Their Cross-Linking Process DOI: 10.3390/ijms24032630 -
Hydrogen bond الثقة 1,0
“The strong absorption of the OH groups linked by hydrogen bonds of the glycosidic ring and the absorption band at 1203 cm-1 suggests the existence cm-1, cm-1, bonds at 3407 -CH, and -CH stretching vibrations at 2901 and C=O and C-C 2 of sul”
Malyar 等 - 2023 - Microfibrillated Cellulose with a Lower Degree of DOI: 10.3390/polym15040904 -
C c single bond الثقة 1,0
“C-H stretching vibration of methoxyl group 2926 C=C ring stretch (conjugated) in aromatic 1612 O-H bend of carboxylic acids 1444 C-C stretch in ketones 1342 C-C(O)-C stretch of esters 1203 cm-1 A strong band at 3404 was discovered and assig”
Nwosu 和 Amusat - 2021 - DOI: 10.4152/pea.2021390605
هل لديك طيف بهذه الحزمة؟
قم بتحميل طيف FTIR الخاص بك واحصل على تقرير تفسير كامل — تعيينات الذروة مع استشهادات الأدبيات، مطابقات المكتبة، وسلسلة أدلة مصنفة الثقة — في ثوانٍ.