Figure 1: Chemical structures of 1,1'-didodecyl-1,1'-but-2-yne-1,4-diyl-bispyrrolidinium dibromide (G1), N,N'-didodecyl-N,N,N',N'-tetramethyl-N,N'-but-2- ynediyl-di-ammonium dibromide (G2), and sodium dodecyl sulfate (SDS).