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Topic: Why sometime there is a doublet band in FTIR refer to the same molecule?  (Read 3625 times)

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Offline umalaya

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Why sometime there is a doublet band in FTIR refer to the same molecule?
« on: May 25, 2010, 06:57:22 AM »
Hi,

Can anyone share with me that why sometime there is a double band or triplet band in the FTIR spectrum refer to the same molecule vibration?

Thank you very much...
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Offline marquis

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Re: Why sometime there is a doublet band in FTIR refer to the same molecule?
« Reply #1 on: May 25, 2010, 08:06:15 PM »
In a molecule like polyethylene, the doublets indicate crystalinity. 
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Offline umalaya

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Re: Why sometime there is a doublet band in FTIR refer to the same molecule?
« Reply #2 on: May 26, 2010, 02:38:18 AM »
hi, thanks... but why a crystalinity shows a doublet bands?
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