What absorbs at 3107 cm⁻¹ in an FTIR spectrum?

Быстрый ответ

A band near 3107 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.

Возможные назначения функциональных групп

Ранжирование отражает накопленные литературные данные, а не единственное авторитетное правило. Всегда проверяйте в контексте вашего образца.

Возможные материалы

Материалы отображаются только при поддержке данной полосы и хотя бы одного дополнительного характеристического пика из того же литературного пула.

Логика спектра

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 3107 cm⁻¹ is usually not enough for material identification by itself.

Использование в реальных условиях

Такой тип запроса распространен при идентификации полимеров, скрининге неизвестных пластиков, устранении неполадок в контроле качества, проверке переработанных материалов и анализе отнесения пиков на основе литературы.

Распространенные ошибки

• Рассмотрение одной изолированной полосы как доказательства материала без проверки хотя бы одного или двух поддерживающих пиков.
• Игнорирование перекрытия: несколько функциональных групп могут вносить вклад вблизи одного и того же волнового числа.
• Пропуск проверки, когда добавки, смеси, окисление или загрязнение могут исказить спектр.

Рекомендации по проверке

Когда остается неоднозначность, проверьте гипотезу с помощью DSC, GC-MS или TGA, особенно для смесей, деградированных образцов и наполненных полимеров.

Литература, лежащая в основе этих назначений

• N-O bond достоверность 1,0

  “cm-1, 3085.4 For diamonds with no milky features, ~76% of them showed the peak at 3107 cm-1, while only ~8% showed a very weak peak at 3085.4 which is absent in the rest of the 23”

  Gu 和 Wang - 2018 - Optical defects in milky type IaB diamonds DOI: 10.1016/j.diamond.2018.09.010
• достоверность 1,0

  “4), values very rarely observed globally but Hydrogen impurities in diamond are indicated by an infrared 3107cm-1, absorption peak at characteristic for so-called Group B (high-Ca eclogitic) diamonds attributed to stretching vibrations of”

  The micro-/macro-diamond relationship: A case study from the Artemisia kimberlite (Northern Slave Craton, Canada) DOI: 10.1016/j.lithos.2012.05.031
• достоверность 1,0

  “cm-1 3.3 Hydrogen-related infrared absorption peak at 3107 cm-1 The hydrogen-related infrared absorption peak at 3107 has been assigned to the structure of three nitrogen atoms and a hydrogen atom surrounding a vacancy (VN 3H) [24].”

  Lai 等 - 2020 - Spectroscopic features of natural and HPHT-treated DOI: 10.1016/j.diamond.2019.107642
• Alkyl C-H достоверность 1,0

  “2808-2806 C-H in CH3 stretching 3107 3109-3123 C-H aromatic stretching The main changes observed in Figure 4, as a consequence of the reaction of AZA with”

  Photodegradation of Azathioprine in the Presence of Sodium Thiosulfate DOI: 10.3390/ijms23073975
• Alkyl C-H достоверность 1,0

  “The absorption peaks at gen impurity at 2850, 2920 and 3107 cm-1 sp3-CH 2are responsible for anti-symmetric vi2850 and 2920 sp3-CH 2symmetric vibrations in diamond, respectively brations and Fig.7.ThetypicalFTIRrecordedforthesynthesizeddiam”

  Yan 等 - 2016 - The effect of phosphorus and nitrogen co-doped on DOI: 10.1016/j.ijrmhm.2015.08.009
• C-S single bond достоверность 1,0

  “υ(HC=N) γ(HC=N) υ(C=N) C-S-C C-O υH2O cm-1 The two bands at 3107, 3103, 3085, and 3100 and at 2979, 2984, 2974, and Compounds υ(Ln-S) υ(Ln-N) Imine Imine Thiazole Thiazole Furane Lattice cm-1 2986 are due to the asymmetric and symmetric str”

  Synthesis, Characterization and Biological Activities of New Schiff Base Compound and Its Lanthanide Complexes DOI: 10.3390/ph15040454
• Alkyl C-H достоверность 1,0

  “and measuring in one place necessarily includes other cm-1 The peak at 3107 related to C-H vibrations is detected in most of the samples studied.”

  Mashkovtsev 等 - 2021 - Specific spectroscopic features of yellow cuboid d DOI: 10.3190/jgeosci.323
• Alkyl C-H достоверность 1,0

  “The height (or area) of the band at 3107 cm-1, 58 considered as the major absorption band and related to a C-H bond in the N 3VH defect 59 [23,24], is used to estimate if a diamond is "H rich" [25].”

  Combination of ERDA, FTIR spectroscopy and NanoSIMS for the characterization of hydrogen incorporation in natural diamonds DOI: 10.1016/j.diamond.2023.110007