What absorbs at 975 cm⁻¹ in an FTIR spectrum?
A band near 975 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
Тез жооп
A band near 975 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.
Мүмкүн болгон функционалдык топтордун дайындоолору
| Функционалдык топ | Колдоочу фактылар | Цитаталанган булактар | Эң жогорку ишенимдүүлүк |
|---|---|---|---|
| Alkyl C-H | 4 | 4 | 1.0 |
| Methacrylate | 3 | 3 | 1.0 |
| Acetate | 3 | 3 | 1.0 |
| Silicon-oxygen (Si-O) | 3 | 2 | 1.0 |
| Phosphate (PO4) | 2 | 2 | 1.0 |
| Methoxy (OCH3) | 2 | 2 | 1.0 |
| C-O single bond | 2 | 2 | 1.0 |
| Aromatic ring | 1 | 1 | 1.0 |
| Ketone | 1 | 1 | 1.0 |
| Ester | 1 | 1 | 1.0 |
| Carboxyl (COOH) | 1 | 1 | 1.0 |
| Carbonyl (C=O) | 1 | 1 | 1.0 |
| Amide | 1 | 1 | 1.0 |
| Hydroxyl (O-H) | 1 | 1 | 1.0 |
| Alkene (C=C) | 1 | 1 | 1.0 |
| S eq o | 1 | 1 | 1.0 |
| Sulfonyl | 1 | 1 | 1.0 |
| Silicate | 1 | 1 | 1.0 |
| C c single bond | 1 | 1 | 1.0 |
| Silicon (Si) | 1 | 0 | 1.0 |
Рейтинг жыйналган адабият далилдерин чагылдырат, бир авторитеттүү эрежени эмес. Ар дайым үлгү контекстиңизге каршы ырастаңыз.
Спектр логикасы
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 975 cm⁻¹ is usually not enough for material identification by itself.
Реалдуу дүйнөдө колдонуу
Бул сурам полимерди аныктоо, белгисиз пластикти скринингдөө, сапатты көзөмөлдөө маселелерин чечүү, кайра иштетилген материалды текшерүү жана адабиятка таянып чокуларды дайындоону карап чыгууда кеңири таралган.
Кеңири таралган каталар
- Жок дегенде бир-эки колдоочу чокуну текшербей туруп, бир обочо тилкени материалдын далили катары кароо.
- Кайталанууну эске албай: бирдей толкун сандарына бир нече функционалдык топтор салым кошо алат.
- Кошумчалар, аралашмалар, кычкылдануу же булгануу спектрди бузушу мүмкүн болгондо текшерүүнү өткөрүп жиберүү.
Текшерүү кеңеши
Эки аныксыздык калганда, гипотезаны DSC, GC-MS же TGA менен текшериңиз, өзгөчө аралашмалар, бузулган үлгүлөр жана толтурулган полимерлер үчүн.
Бул дайындоолордун артындагы адабияттар
-
Alkyl C-H ишенимдүүлүк 1.0
“TheFTIR spectrawere seen to bedominated bya peak at975 for C-Hout ofplane deformation modes alongwith peaks cm(cid:3)1, for C-H bending, C-H stretching and C-C stretching modes at 858, 1113 and 1189 respectively.”
Hussain 和 Pal - 2007 - Synthesis of composite films of mixed Ag-Cu nanocr DOI: 10.1016/j.apsusc.2006.07.074 -
ишенимдүүлүк 1.0
“Intense, shoulder Intense Si-O 1000 SiO2 stretching lattice n/a Intense, shoulder Intense Si-O 975 SiO2 silicate stretching (kaolinite, illite) [86] n/a Intense, shoulder Intense”
FTIR photoacoustic spectroscopy for identification and assessment of soil components_ Chernozems and their size fractions DOI: 10.1016/j.pacs.2020.100162 -
Sulfonyl ишенимдүүлүк 1.0
“The symmetric symmetric and asymmetric S(=O) stretching vibration and asymmetric O=S=O stretching vibration peaks are 2 peaks and S-N-C absorptions, which appears at 975 cm-1, located at 1180 and 1359 respectively.”
Tosa 等 - 2012 - Simultaneous Determination Of Some Artificial Swee DOI: 10.1063/1.3681976 -
Acetate ишенимдүүлүк 1.0
“The major auto-peaks of type I in 975cm(cid:2)1 975cm(cid:2)1 which forms a 2(cid:3)2 peak cluster, while those of might stand for the vibration of C-O-C in cyclane.”
Evaluation on intrinsic quality of licorice influenced by environmental factors by using FTIR combined with 2D-IR correlation spectroscopy DOI: 10.1016/j.molstruc.2010.03.017 -
ишенимдүүлүк 1.0
“α-Phase are 975”
Abdullah 等 - 2014 - Effect of annealing process on the phase formation DOI: 10.1063/1.4895187 -
Alkene (C=C) ишенимдүүлүк 1.0
“M cm-1 975 band was assigned to the wags of the C 7-H and the C 8-H (i.e., coupled in-phase a vibrations of the vinyl protons in -HC 7=C 8H);”
Dioumaev 等 - 2010 - Low-Temperature FTIR Study of Multiple K Intermedi DOI: 10.1021/jp908698f. -
ишенимдүүлүк 1.0
“The weaker bands at 1137 1205cm-1 O bonds (E symmetry) lead to the intense band centred at and are assigned to Si-O stretching in the eight- ∼975cm-1 in Lz.”
Fritsch 等 - 2021 - Structural, textural, and chemical controls on the DOI: 10.5194/ejm-33-447-2021 -
Hydroxyl (O-H) ишенимдүүлүк 1.0
“While the other bands between 541, 626, the functional group region of stretch and one more peak at 1440 indicates the phenolic -C=O 879, 975 and 1052 cm-1 may be attributed to the -C-Hbending and -C-Clstretching, respectively -OH and is st”
Kumar 等 - 2019 - Equilibrium and Kinetic Studies of Biosorptive Rem DOI: 10.3390/pr7100757
Ушул тилке менен спектриңиз барбы?
FTIR спектриңизди жүктөп, толук интерпретация отчетун алыңыз — адабият цитаталары менен чоку дайындоолор, китепкана дал келүүлөрү жана ишенимдүүлүк баасы менен далилдер чынжыры — секунддар ичинде.