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doudounba(½ð±Ò+3,VIP+0): 9-6 08:34
On the other hand, the peak at 1000cm-1 disappeared in Raman bonds with concentration decreasing (see figure 1). It is known that the methyl and double bond of ¦Â-carotene enhanced by resonance effect of Raman. The disappearance showed  the enhanced mechanism of the methyl and double bond was different.
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2Â¥2009-09-05 14:11:52
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doudounba(½ð±Ò+6,VIP+0): 9-6 08:34
ÁíÒ»·½Ã棬ÎÒÃÇ´Óͼһ¿ÉÒÔ¿´³öËæ×ÅŨ¶ÈÖð½¥½µµÍ£¬~1000cm-1´¦µÄCH3À­Âü·åÏûʧ¡£ÖÚËùÖÜÖª£¬¦Â-ºúÂܲ·ËصÄCH3ÓëCCµ¥Ë«¼ü¶¼Îª¹²ÕñÀ­ÂüЧӦÔöÇ¿£¬¶øËæ×ÅŨ¶È½µµÍCH3¼üµÄÀ­Âü·åÏûʧ£¬ËµÃ÷CCµ¥Ë«¼üÓëCH3ÔÚÕâÖÖÇé¿öÏÂÔöÇ¿»úÖÆ²»Í¬¡£

On the other hand, we can see from Figure 1 that as concentration decreased gradually, Raman peak of CH3 at ~ 1000cm-1 disappears. As we know, CH3 of ¦Â-carotene and CC double bond were enhanced as single-resonance Raman Effect. As concentration of CH3 reduced, the peak disappeared, indicating CC single and double bond and CH3 in this case show different enhancing mechanism.
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3Â¥2009-09-05 15:08:49
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doudounba(½ð±Ò+6,VIP+0): 9-6 08:34
On the other hand, Figure 1 showed that the Raman peak of CH3 degraded with the decrease of the concentration and disappeared at ~ 1000cm-1. It was well known that the Raman Effect enhanced when CH3 in ¦Â-carotene and the single-double bonds of CC were both resonance. And the result indicated that the enhancing mechanism of CH3 in this case made a great deal of difference to that of the single-double bonds of CC.
4Â¥2009-09-06 01:55:21
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