Ahmed Mohamed Ahmed Mahmoud

6 Questions 14 Answers 0 Followers

Questions related from Ahmed Mohamed Ahmed Mahmoud

How we make solid state alkylation of polyfluorene membranes at 9,9(H) position????

I have grafted membrane based on poly-2-vinylfluorene and I want to alkylate (9(H) position via haloalkanes......could you help????

03 June 2019 5,825 2 View

Any advise about the synthesis of N-alkylation of pyrrolidine, 2-methyl imidazole and benzimidazole?

I want to prepare N-alkyl pyrrolidine, 2-methylimidazolole and benzimidazole from alkyl bromides. but using base was not enough for this reaction. If someone has experience in that reaction, I...

10 April 2015 5,678 6 View

Could you give me any advice about the best solvent for casting my membrane?

I`m preparing block copolymer . hydrophobic part is polyflourinatedpolyphenylether and the hydrophilic part if polyphenylene. I tried to cast the polymer to get the membrane but the membrane was...

23 February 2015 7,366 8 View

Does anyone have an idea about the best method to prepare Vilsmeier salts of ureas?

I tried different methods but either low yield or no product obtaied?

29 January 2015 1,466 4 View

How can I prepare a membrane of solid polymer for fuel cell applications?

I want to prepare a membrane from solid aromatic block co-polymer for fuel cell applications. How do I do it?

22 September 2014 9,006 2 View

How can the reaction of cyanoguanidine and ethylenediamine proceed?

Does anyone have an idea about that reaction? I want a nucleophilic attack of ethylenediamine on cyano group in cyanoguanidine. May it proceed in diluted HCl?

29 November 2013 5,062 3 View