Re: ORGLIST:PTCDA purification, solving

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From: Georgi Ginev (georgi_ginev$##$yahoo.com)
Date: Fri Oct 11 2002 - 02:30:51 EDT

Thank you for the response, but PTCDA is not soluble
in acetic acid and slightly soluble in DMSO.
The purification with re-crystallization can not be
done, since it is not sure which is the crystallized
fraction - dianhydride or the dianhydride + H2O.
Sensitivity to moisture is main problem for this
material.
Only one way is the sublimation, but I do not know how
to check the quality of the new material.
Many thanks
Georgi

--- Vijay Sane <vsane$##$hotmail.com> wrote:

<HR>
<html><div style='background-color:'><DIV>
<P><BR><BR></P></DIV>
<P>Dear Georgi</P>
<P>Have you tried acetic acid as a solvent for
purification? I have carried out purification on a
similar type of tetra carboxylic acid and it works
fine.</P>

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