What absorbs at 485 cm⁻¹ in an FTIR spectrum?

Hiter odgovor

A band near 485 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.

Možne dodelitve funkcionalnih skupin

Razvrstitev odraža zbrane literaturne dokaze, ne enega avtoritativnega pravila. Vedno preverite glede na kontekst vašega vzorca.

Možni materiali

Materiali so prikazani le, ko ista literaturna podlaga podpira ta pas in vsaj en dodatni karakteristični vrh.

Logika spektra

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 485 cm⁻¹ is usually not enough for material identification by itself.

Uporaba v resničnem svetu

Ta vrsta poizvedbe je pogosta pri identifikaciji polimerov, pregledovanju neznanih plastičnih mas, odpravljanju težav pri QC, preverjanju recikliranih materialov in literaturno podprtem pregledu dodelitev vrhov.

Pogoste napake

• Obravnavanje enega izoliranega pasu kot dokaza o materialu brez preverjanja vsaj enega ali dveh podpornih vrhov.
• Ignoriranje prekrivanja: več funkcionalnih skupin lahko prispeva blizu istega valovnega števila.
• Izpuščanje validacije, ko lahko dodatki, mešanice, oksidacija ali kontaminacija popačijo spekter.

Nasvet za preverjanje

Ko ostaja dvoumnost, potrdite hipotezo z DSC, GC-MS ali TGA, zlasti za mešanice, degradirane vzorce in polnjene polimere.

Literatura za temi dodelitvami

• zaupanje 1,0

  “The FTIR spectra results show (Figure 6) that the absorption peaks at cm-1 485, 519, and 633 are attributed to the Al-O structural vibration and are characteristic peaks of Al 2O 3, consistent with the standard infrared peaks of corundum [1”

  Study on Gemological Characteristics of Blue Sapphires from Baw-Mar Mine, Mogok, Myanmar DOI: 10.3390/cryst11111275
• Metal oxygen zaupanje 1,0

  “The peak at 485 corresponds to the bending vibration of V-O-V [20].”

  Saravanakumar 等 - 2018 - Role of NaOH concentration on synthesis and charac DOI: 10.1063/1.5047993
• Metal oxygen zaupanje 1,0

  “Earlier workers have reported the presence of Table 3) which almost matched with the data recorded by cm-1 cm-1 Zn-O 400-500 theDebye-Scherrerprocess.Table4demonstratestherelation the band at 485 [58], 442 [59],”

  Udhayan 等 - 2021 - Evaluation of Bioactive Potential of a Tragia invo DOI: 10.1007/s12668-021-00864-z
• Metal oxygen zaupanje 1,0

  “Hence, the relative intensity of TiOH(948cm-1),Ti-O-Ti band(485cm-1)”

  Wan 等 - 2006 - Structure and thermal properties of titanium dioxi DOI: 10.1007/s00289-006-0506-6
• Metal oxygen zaupanje 1,0

  “Zn-O stretching vibrations are shifted to 495 cm-1 from 485 cm-1 with the addition of Cu-O Peak at 485”

  Successive Photocatalytic Degradation of Methylene Blue by ZnO, CuO and ZnO/CuO Synthesized from Coriandrum sativum Plant Extract via Green Synthesis Technique DOI: 10.3390/cryst13020281
• Metal oxygen zaupanje 1,0

  “2 cm-1 300 (cid:3)C a wide band at 400-500 with maximum at and 500 (cid:3)C almost a plateau in sample mass can be cm-1 about 485 specific to Cu-O vibrations [33] appears.”

  Synthesis of anisotropic Cu2-xS-based nanostructures by thermal oxidation DOI: 10.1007/s10973-019-08622-w
• Acetate zaupanje 1,0

  “501 νCdO νC-O available, by comparing the position of the bands with charactercoordinates, and the stretching mode, respec485 502 tively.41,73,77 istic bands of similar molecules.”

  Lopes 等 - 2011 - Photochemistry and Vibrational Spectra of Matrix-I DOI: 10.1021/jp110705c
• Acetate zaupanje 1,0

  “C-O-C likeamines,phenols,alcohols,saponins,carboxylic acids, gave rise to the peak at  485 Antifungal and cytotoxic activities of AgNPs Fourier-transform Si-AgNPs.”

  Rizwana 等 - 2022 - Biosynthesis and characterization of silver nanopa DOI: 10.1515/gps-2022-0048