Dear Haifeng,

It really depends on what you want to know. For example, if you are interested in the morphology of your compound, you can try SEM. TEM is also a good analysis presenting an image with the deepness of the compound. For characterization, usually CHN, EDX and IR are reported in the articles. For IR, you should take an IR from your ligand (amino acid) and one from the complex and then compare them and see the shifting in the peaks. H NMR can be also very helpful in this case. If you are eager about thermal stability of your compound, then you should apply for a TGA analysis. Finally the most important technique:  X-ray. The real structure and actual geometry of your complex can present by X-ray so try to make a single crystal from your complex. 

Cheers,

Ashkan

Dear Haifeng,

It really depends on what you want to know. For example, if you are interested in the morphology of your compound, you can try SEM. TEM is also a good analysis presenting an image with the deepness of the compound. For characterization, usually CHN, EDX and IR are reported in the articles. For IR, you should take an IR from your ligand (amino acid) and one from the complex and then compare them and see the shifting in the peaks. H NMR can be also very helpful in this case. If you are eager about thermal stability of your compound, then you should apply for a TGA analysis. Finally the most important technique:  X-ray. The real structure and actual geometry of your complex can present by X-ray so try to make a single crystal from your complex. 

Cheers,

Ashkan

I totally agree with Ashkan

Furthermore, to determine the purity of your complexes of course elemental analysis comes to mind. If you cannot get a fitting result out of this (because of solvent impurities or so on), an ESI/HRMS should at least give you an idea, if the complex you synthesized actually has the desired composition.

I think that if you want to determine the C-M bond on your compound, you need the Near Infrared Spectroscopy (NIR). So you can characterize your compound by 13CNMR.  

Analyze Metal Organic Complexes you need UV,IR, NMR , ESR etc. spectroscopic analysis. For determination of the element you need Atomic Absorption study. If your complex is crystalline , you can do single crystal analysis to confirm geometry . You can do conductivity measurement to decide the nature of rhe complexes.

You should go for elemental analyses(C,H,N, metal) to assign tentative composition. Even conductivity measurement also can supplement it. After that,  perform electronic( for geometry) IR( for bonding sites) NMR( for structural determination) ESR( supplementing  on the basis of unpaired electrons) spectral studies and TGA, DTA and DSC for thermal characterization X ray studies for crystal studies.

R S SINDHU

Thank you very much for everyone hlep. Your advices give me a large inspired.