Dear All,
I've been synthesizing Ge nanoparticles using OAm as a solvent/capping agent.
Now I'm in the process of assigning the FTIR peaks of my samples.
I've assigned almost every peak in the original solvent, and the same with the NPs.
While comparing them it appears that the features related to N-H disappear, while a new peak forms at 908 cm-1. Please find a screenshot of the comparison in the attachments.
Now the amine can attach at the same time the Ge NPs from the nitrogen side as well as the double bond, assuming the condition are not right for an hydrogermilation reaction, meaning the only possibility is the attachment from the nitrogen side, this new peak should be related to some H-Cn-N-Ge. Sadly, such a system is not really represented in literature or textbooks, my colleagues couldn't help, and running a DFT calculation is quite outside my capacity. So i have no way to clearly identify the origin of this peak. This is getting a bit frustrating, so, I'm trying to ask the scientific community for collective knowledge. Does any of you have experience or the meaning to unveil the nature of that damn peak?
Thanks in advance for your time
Bruno
Bruno Pescara
See
Article Halogen-induced Crystallinity and Size Tuning of Microwave-a...
Perhaps the band corresponds to the presence of the Ge-OAm-halide complex
Yuri Mirgorod, thanks for your contribution.
I guess you're suggesting that the peak at 908 cm-1 is originating from the trans-cis isomerization of oleylamine that happens at high temperatures. There is a shift of about 60 wavenumbers between the measured peak, also a comparison between the spectral shape looks not really the same since my signal is rather medium/strong than weak. Nevertheless, I really appreciated the suggestion ad the paper, besides, so far this is the best assignment for my peak, although I'm not convinced this is the responsible, I will definitely discuss this possibility with my supervisors.
Thanks again.
Bruno
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