e*********s
发帖数: 1440 | 1 It seems that passing the polymer solution through an alumina column can't
remove the copper salt. Does anyone know how to remove the copper salt from
the polymer?
Thanks. |
D********g
发帖数: 533 | 2 what solvent did you use?
from
【在 e*********s 的大作中提到】
: It seems that passing the polymer solution through an alumina column can't
: remove the copper salt. Does anyone know how to remove the copper salt from
: the polymer?
: Thanks.
|
e*********s
发帖数: 1440 | 3 2-propanol
【在 D********g 的大作中提到】
: what solvent did you use?
:
: from
|
D********g
发帖数: 533 | 4 that might be the problem. iPrOH is too polar that it tend to elute with the
copper-ligand complex out of the column. Try neutral Alumina column,
evaporate the isopropanol, redissolve into THF or dioxane or less polar
solvent. pass the column again.
【在 e*********s 的大作中提到】
: 2-propanol
|
e*********s
发帖数: 1440 | 5 Thank you very much for your suggestion. I will try that.
the
【在 D********g 的大作中提到】
: that might be the problem. iPrOH is too polar that it tend to elute with the
: copper-ligand complex out of the column. Try neutral Alumina column,
: evaporate the isopropanol, redissolve into THF or dioxane or less polar
: solvent. pass the column again.
|
c*s
发帖数: 2145 | 6 either you can try oxide/reduce it following crooks de's macromolecules
paper |
e*********s
发帖数: 1440 | 7 I have tried this. Unfortunately, it didn't work. The problem is that poly(
2-vinylpyridine) is coordinated with the copper salt. I did the synthesis
based on literature, which says the solution is colorless after passing
through alumina column. Maybe there is a tricky issue that I don't realize.
the
【在 D********g 的大作中提到】
: that might be the problem. iPrOH is too polar that it tend to elute with the
: copper-ligand complex out of the column. Try neutral Alumina column,
: evaporate the isopropanol, redissolve into THF or dioxane or less polar
: solvent. pass the column again.
|
e*********s
发帖数: 1440 | 8 Can you give me some more information about this paper, such as volume and
page?
Thanks
【在 c*s 的大作中提到】
: either you can try oxide/reduce it following crooks de's macromolecules
: paper
|
D********g
发帖数: 533 | 9 hmmm... then the copper may be ligated via pyridyl groups... I also want to
know the tricks... since my polymer also can form ligation with copper and
after twice the column and it is still light green. However, isopropyl
alcohol definitely cannot get any ligands out, at least for my polymer.
Good luck.
poly(
【在 e*********s 的大作中提到】
: I have tried this. Unfortunately, it didn't work. The problem is that poly(
: 2-vinylpyridine) is coordinated with the copper salt. I did the synthesis
: based on literature, which says the solution is colorless after passing
: through alumina column. Maybe there is a tricky issue that I don't realize.
:
: the
|
t***u
发帖数: 20182 | |
M*****9
发帖数: 320 | 11 1) Cuprisorb (TM)
2) Acidify to protonate the nitrogen |
