How can I change the coordination mode of my ligand?

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Jose Velazquez

I know about them but I'm not looking for a recipe. I'm looking for the why or how I can or cannot do the change of binding mode. Thanks for your answer

Yes

Yes, water

1:1 ligand metal, and solvents water/acetic acid, and just to be attached to one of the papers, it's 2:1 ligand:metal in DMF and acetic acid.

Almost the same in both cases 0.25 mmol per ml of solvent

Thanks Micheal I have seen that before but as I said before I'm not looking for a recipe, but for a criteria to follow. Thanks anyway!!!

Sudarsan VenkatRamani

I have looked up some references and all data point to monodentate mode of chelation of the carboxylate. Maybe the SBU formed through this mode of chelation offers greater stability to the MOF. Do you know of any SBU that shows bidentate chelation with 3,5-PDC and the metal ions you suggested? Would a post synthetic modification with 3,5-PDC on a preformed MOF exhibiting bidentate chelation work?

I think that I do not make myself clear or I misunderstoond your answer but what I want is to form a cluster as SBU using the chelation mode of the carboxylic acid. Then, yes there are papers. Yes, again a post synthetic modification would be a good idea. However, Again, I would rather prefer a criteria to produce the bidentate mode of carboxylic acid, rather than a recipe.

Thanks, Michael I saw your message yesterday you do not need to repeat it

From data I looked up, there is NO SBU which has the requisite bidentate mode of chelation with 3,5-PDC. You only have the monodentate version. So maybe you have to rethink this. Unless you can find an SBU with the bidentate mode of chelation, this is going to be a tough ask, unless you alter your reaction conditions totally like Dr. Paech has suggested. Good luck on the hunt.