The Vibrational Spectroscopy of the Valence Bonds of Cu-Doped TiO₂ Using Electronegativity Principle Quantitative Calculations

Table 4

Infrared spectra of the undoped TiO₂ samples with the content and vibrational frequency of valence bonds.

The type of bonds	Content (%)	Vibrational frequency (cm^−1)
TiA-O	23.87	1563.4, 1114.3, 670.1, 620.9, 580.35, 548.17, 508.54, and 454.25
TiR-O	16.30	1513.7, 1459.5, 1395.6, 823.66, 765.65, and 716.7
H-O	7.41	1712.9, 1638.3