I'm looking for a method to attach APBA to a SU-8 surface. Until now, I'm not very successful in the process.
The SU-8 is a 1um film deposited over a surface. I'm trying to immerse the substrate in 80mM of APBA in ethanol.
Can you give me an advice?
Kind regards.
PS: Chemical molecules and suppose reaction
SU-8 https://upload.wikimedia.org/wikipedia/commons/8/8c/SU-8_photoresist.png
3-APBA https://www.sigmaaldrich.com/content/dam/sigma-aldrich/structure2/125/mfcd00007755.eps/_jcr_content/renditions/mfcd00007755-large.png
Reaction: https://ars.els-cdn.com/content/image/1-s2.0-S0021967310004334-gr2.jpg
Hi Manuel.
Oxirane ring can reacts with alcohol via etherification reaction. But it needs catalyst such as tertiary amine (triethylamine and etc.). Also, it easily reacts with amines.
Relating to your synthesis , may be the ethanol (solvent) participate in oxirane ring openning reaction.
Also, higher temperature im more favorable.
Don't use solvent or If you need solvent, change it.
Good luck
Glycidylethers react easily with amines , also anilines. Perhaps you need a catalyst to improve the reaction like Lewis acids (Zn tetrafluoroborate, Mg perchlorate....) or microwave irradiation. Also many metal complexes are good catalysts.
Hello!
Thanks for your answers Burkhard Koehler & Mohsen Zolghadr .
Do you think that solve the APBA in water will be a good idea? Can you recommend me another solvents?
Thanks.
The reaction runs in water also in a biphasic manner. In this case micro wave irradiation is good for supporting the reaction. Also lower alcohols, especially isopropanol, could be a good solvent or all dipolar aprotic solvents, like DMF, DMA, ..., but it is not easy to get rid of them.
Burkhard Koehler Thanks for your quick answer. I'm going to try and I will give a feedback!
Dear Burkhard Koehler
I tried with IPA and the results was successful. Same results achieved that with others alcohols with much less concentration .
Thanks for the useful help.