Sentence examples for aromatic bands from inspiring English sources

Low intensity aromatic bands were observed in 900 700 cm−1 regions in these lignites.

The peaks around 1,500 1,652 cm−1 suggest that aromatic ring bands and double bond (C=C) vibrations overlap with C=O stretching vibration bands and OH bending vibration bands.

The binding of catechol to TiO2 via two adjacent phenolic groups even affects the stretching of the aromatic ring (bands above 1400 cm−1).

The IR spectrum showed hydroxyl, conjugated carbonyl and aromatic ring absorption bands at 3071, 1661 and 1619 cm-1, respectively.

The absorption bands at 1,620 and 1,404 cm−1 are assigned to the stretching vibration of C=C in an aromatic ring, while the bands at 1,640, 1,300 and 1,188 cm−1 are assigned to those of C=O, C O and C N, respectively (Rubino 2001; Pouchert 1975; Pavia et al. 1996).

In addition, the spectra of the antimicrobial polymers (V-X) shows many significant changes; a new band was appeared around 1583 cm−1 due to aromatic ring and new band at 3375 and 3414 cm-1 which is attributed to the –OH stretching vibration, which in conclusion confirm the immobilization of benzaldehyde onto amine-terminated PANs.

Four features were observed in the absorption spectra: the uv tail of the band of the aromatic ring structures, a weak absorption band at 340 nm corresponding to the polymer in the reduced state, a strong broad band at 440 nm corresponding to the oxidized state of the polymer and a maximum in absorbance at about 750 nm when going from the reduced to the oxidized states.

Floresolides possessing a ε-lactone bridging at aromatic ring and metacyclophane band are unique members of the class of secondary metabolites known as longithorones and longithorols from the ascidian A. longithorax.

In the case of FTIR spectroscopic analysis for PF shell (Figure 1a), the absorption bands observed at 1,696 and 1,462 cm−1 were attributed to the C=C aromatic ring vibrations, and the bands at 1,274 and 1,154 cm−1 were characterized to the C-C-O asymmetric stretching and C-H in plane deformations, respectively.

Bis-pyrimidine (II) showed the characteristic bands at 3106 and 1518 cm−1 for the presence of C H and C=C group in aromatic ring respectively and characteristic bands at 3370, 1600 and 1349 cm−1 for indicated the presence of C NH2; N=CH str., of pyrimidine and C N sym stretches of Ar NO2 group.

Bis-pyrimidine (II) showed the characteristic IR bands at 3058 and 1537 cm−1 for the presence of C H and C=C group in aromatic ring, respectively and characteristic bands at 3331 and 1604 cm−1 for the presence of –NH2 and N=CH str.