What absorbs at 787 cm⁻¹ in an FTIR spectrum?
A band near 787 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 6 cited sources
Jibu la haraka
A band near 787 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.
Ugawaji unaowezekana wa vikundi vya kazi
| Kikundi cha kazi | Ukweli unaounga mkono | Vyanzo vilivyotajwa | Uaminifu wa juu |
|---|---|---|---|
| Silicon-oxygen (Si-O) | 5 | 5 | 1.0 |
| Silicon (Si) | 3 | 3 | 1.0 |
| Siloxane (Si-O-Si) | 2 | 2 | 1.0 |
| Silicon silicon | 1 | 1 | 1.0 |
Cheo kinaonyesha ushahidi wa fasihi uliokusanywa, si sheria moja yenye mamlaka. Thibitisha kila mara dhidi ya mazingira ya sampuli yako.
Mantiki ya wigo
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 787 cm⁻¹ is usually not enough for material identification by itself.
Matumizi ya ulimwengu halisi
Aina hii ya swala ni ya kawaida katika utambuzi wa polima, uchunguzi wa plastiki isiyojulikana, utatuzi wa shida za QC, uthibitishaji wa nyenzo zilizosindikwa, na ukaguzi wa ugawaji wa kilele unaoungwa mkono na fasihi.
Makosa ya kawaida
- Kuchukua bendi moja iliyotengwa kama uthibitisho wa nyenzo bila kuangalia angalau kilele kimoja au viwili vya usaidizi.
- Kupuuza mwingiliano: vikundi vingi vya utendaji vinaweza kuchangia karibu na nambari ya wimbi sawa.
- Kuruka uthibitishaji wakati viongezi, mchanganyiko, uoksidishaji, au uchafuzi unaweza kupotosha wigo.
Ushauri wa uthibitishaji.
Wakati utata unabaki, thibitisha nadharia kwa kutumia DSC, GC-MS, au TGA, hasa kwa mchanganyiko, sampuli zilizoharibika, na polima zilizojazwa.
Fasihi nyuma ya ugawaji huu
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Silicon (Si) uaminifu 1.0
“The Infrared (IR) spectra showed peaks at 461.231 787.381 cm-1, Si∼O∼Si Si∼O∼Si and 1045.99 which corresponds to the bending vibration, the Si∼O∼Si stretch vibration, and the stretching vibration, respectively.”
Green Synthesis of Crystalline Silica from Sugarcane Bagasse Ash: Physico-Chemical Properties DOI: 10.3390/nano12132184 -
Silicon (Si) uaminifu 1.0
“The band at wavenumber 907 cm-1 corresponds to the O-H deformation of the internal hydroxyl groups, and that at 787 cm-1 is due to a symmetrical Si-O stretching vibra-”
Morphology and Selected Properties of Modified Potato Thermoplastic Starch DOI: 10.3390/polym15071762 -
Silicon-oxygen (Si-O) uaminifu 1.0
“However, the band shown at wavenumber 787 indicates bending in quartz (Toor 2015).”
Musie 和 Gonfa - 2023 - Thermal activation, characterization and performan DOI: 10.2166/wst.2023.031 -
uaminifu 1.0
“700.7463 Si-O stretching, Si-O-Al stretching 786.5672 Si-O stretching, Si-O-Al stretching, (Al, Mg)-O-H, Si-O-(Mg, Al) stretching 908.2090 Al 2OH, AL-O-H vibrations”
Structural Study of Nano-Clay and Its Effectiveness in Radiation Protection against X-rays DOI: 10.3390/nano12142332 -
Silicon (Si) uaminifu 1.0
“FTIR analysis showed peaks in the spectral region of 520, 675, 787, 917, 1030 and 1093 cm-1 which are bending vibrations of symmetric and asymmetric TOT (tetrahedral layers of silicon coordinated with oxygen) (T = Al, Mg, Si and Fe) opening”
Bentonites Modified with Phosphomolybdic Heteropolyacid (HPMo) for Biowaste to Biofuel Production DOI: 10.3390/ma12091431 -
Siloxane (Si-O-Si) uaminifu 0.9
“Explicit assignment in text.”
Mazumder 等 - 2014 - Structural and optical characterization of fresh w DOI: 10.1117/12.2039793
Una wigo wenye bendi hii?
Pakia wigo wako wa FTIR na upate ripoti kamili ya tafsiri — ugawaji wa vilele na marejeleo ya fasihi, ulinganishaji wa maktaba, na mlolongo wa ushahidi wenye kiwango cha uaminifu — kwa sekunde.