What absorbs at 3389 cm⁻¹ in an FTIR spectrum?
A band near 3389 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
فوری جواب
A band near 3389 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.
ممکنہ فنکشنل گروپ تفویضات
| فنکشنل گروپ | معاون حقائق | حوالہ کردہ ذرائع | سب سے زیادہ اعتماد |
|---|---|---|---|
| N h | 5 | 4 | 1.0 |
| Hydroxyl (O-H) | 4 | 3 | 1.0 |
| Hydrogen bond | 2 | 2 | 1.0 |
| Secondary amine | 2 | 2 | 1.0 |
| Carbonyl (C=O) | 1 | 1 | 1.0 |
| Amide | 1 | 1 | 1.0 |
درجہ بندی جمع شدہ ادبی ثبوتوں کی عکاسی کرتی ہے، نہ کہ ایک واحد مستند اصول۔ ہمیشہ اپنے نمونے کے سیاق و سباق کے خلاف تصدیق کریں۔
ممکنہ مواد
| مواد | معاون چوٹیاں | اوورلیپنگ گروپس | حوالہ کردہ ذرائع |
|---|---|---|---|
| chitosan | 3389, 1650, 1655 | Hydroxyl (O-H), N h | 1 |
| cellulose acetate | 3389, 1650, 1741 | Hydroxyl (O-H) | 1 |
| polyurethane | 3389, 2270, 1700 | N h | 1 |
مواد صرف اس وقت دکھایا جاتا ہے جب ایک ہی لٹریچر پول اس بینڈ اور کم از کم ایک اضافی خصوصیتی چوٹی کی حمایت کرتا ہے۔
سپیکٹرم منطق
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 3389 cm⁻¹ is usually not enough for material identification by itself.
حقیقی دنیا کا استعمال
اس قسم کی استفسار پولیمر کی شناخت، نامعلوم پلاسٹک کی اسکریننگ، QC کی خرابیوں کا ازالہ، ری سائیکل شدہ مواد کی تصدیق، اور لٹریچر پر مبنی پیک تفویض جائزہ میں عام ہے۔
عام غلطیاں
- کم از کم ایک یا دو معاون چوٹیوں کی جانچ کیے بغیر ایک الگ تھلگ بینڈ کو مواد کے ثبوت کے طور پر ماننا۔
- اوورلیپ کو نظر انداز کرنا: متعدد فنکشنل گروپ ایک ہی ویونمبر کے قریب حصہ ڈال سکتے ہیں۔
- جب additives، blends، oxidation، یا آلودگی سپیکٹرم کو بگاڑ سکتے ہوں تو تصدیق کو چھوڑنا۔
تصدیق کی مشاورت
جب ابہام باقی رہے تو DSC، GC-MS، یا TGA سے مفروضے کی تصدیق کریں، خاص طور پر مکسچر، خراب شدہ نمونوں، اور بھرے پولیمر کے لیے۔
ان تفویضات کے پیچھے ادب
-
N h اعتماد 1.0
“The origin cm-1 of the vibration bands is as follows: at 3389 due to the NH stretching vibrations, cm-1 cm-1 at 2936 due to a CH-stretching vibrations, at 620 due to CH out-of-plane bending vibration.”
Synthesis and characterization thin films of conductive polymer (PANI) for optoelectronic device application DOI: 10.1063/1.4948838 -
Amide اعتماد 1.0
“Moderate exposure of the cm(cid:0) 1), O-H BRG peaks, displaying stretching (band A, 3389 amide I hydrophobic protein groups promoted the protein-oil interaction, cm(cid:0) 1), C¼O N-H (band B, stretching, 1648 amide II (band C, bending, co”
Effect of different carbohydrates on the functional properties of black rice glutelin (BRG) modified by the maillard reaction DOI: 10.1016/j.jcs.2020.102979 -
Hydroxyl (O-H) اعتماد 1.0
“derived from castor oil, showed the -OH group bending band at 3389 The bands cm-1 at 2926, 2855, and 1739 were designated to asymmetric stretching and symmetric stretching of the CH group and C=O group, respectively.”
Impact of Diisocyanates on Morphological and In Vitro Biological Efficacy of Eco-Friendly Castor-Oil-Based Water-Borne Polyurethane Dispersions DOI: 10.3390/polym14173701 -
Hydrogen bond اعتماد 1.0
“11.3 stretching (5) Si-O asymmetric 1154 1144 1130 1167 stretching (6) N-H(cid:5)(cid:5)(cid:5)N stretching 3341 3345 3351 3358 that there are no N-N and H-H bonds present in the (7) N-H stretching 3389 3396 3399 3403”
Ay 和 Aydinli - 2004 - Comparative investigation of hydrogen bonding in s DOI: 10.1016/j.optmat.2003.12.004 -
اعتماد 1.0
“cm-1, XN-NIC XN-GA was also distinguished in and with a new band at 3352 and 3389 cm-1 respectively, and upshift of band at ca.”
Budziak 等 - 2019 - Formation of Prenylated Chalcone Xanthohumol Cocry DOI: 10.3390/molecules24234245 -
Hydroxyl (O-H) اعتماد 1.0
“LLM confirmed rule peak-group candidate”
Helen 等 - 2023 - Amelioration of ionic conductivity (303 K) with th DOI: 10.21203/rs.3.rs-1557220/v1 -
N h اعتماد 1.0
“Conversely to the PURs the PUR-M revealed the well-shaped NH band was observed as well, but its intensity relating to the "free" NH (3389 cm-1) in the PUR-M stretching band related to the moderate and strong hydrogen bonds present in the HS”
The Influence of Calcium Glycerophosphate (GPCa) Modifier on Physicochemical, Mechanical, and Biological Performance of Polyurethanes Applicable as Biomaterials for Bone Tissue Scaffolds Fabrication DOI: 10.3390/polym9080329 -
Carbonyl (C=O) اعتماد 1.0
“The key feature absorption bands appeared at (1741-1748 which were cm-1 assigned to carbonyl (C=O) as well as a diminishing in the strength of the band at 3388.93 which was attribcm-1) uted to OH vibration, and the peak at (1365-1372 was at”
Ferric perchlorate hydrate as a new catalyst for highly efficient esterification of cellulose at room temperature DOI: 10.1038/s41598-022-09669-w
کیا اس بینڈ کے ساتھ اسپیکٹرم ہے؟
اپنا FTIR اسپیکٹرم اپ لوڈ کریں اور سیکنڈوں میں مکمل تشریحی رپورٹ حاصل کریں — ادبی حوالوں کے ساتھ چوٹی کی تفویض، لائبریری میچز، اور اعتماد کی درجہ بندی کے ساتھ ثبوت کی زنجیر۔