Understanding FTIR Peaks of PO4 Compounds

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FTIR graphs display multiple peaks for the same compound due to different vibrational modes of the molecular bonds. Each peak corresponds to unique bond interactions, such as stretching and bending, which vary based on the molecular structure. For the phosphate ion (PO4), peaks like v1, v3, and v4 represent different vibrational modes, including symmetric and asymmetric stretching. The complexity of the IR spectrum increases with the number of unique bonds and their interactions. Understanding these peaks is essential for identifying and analyzing compounds in various applications.
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why on ftir graph there are several peaks for the same compound but at different wavelengths?
what causes the different modes of vibration for the same compound (PO4), what causes the v1 ,v3,v4 for PO4... help me please:frown:
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An IR spectrum is a molecule's fingerprint. Every unique compound will have its own IR spectrum. The various peaks depend on the individual bonds in the molecule. Then subdivide the number of unique bonds into stretching modes, symmetric stretching, asymmetric stretching, rocking, wagging, etc. Even simple molecules can have busy IR spectra.
 

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