Various　aggregates,　such　as　spherical　and　elongated　micelles,　tubular　and　rodlike　aggregates,　as　well　as　vesicles,　are　induced　by　adding　sodium　2-naphthalenesulfonate　(SNphs)　or　sodium　benzenesulfonate　(SBzs)　into　the　aqueous　solution　of　a　gemini　surfactant　C12C2C12(Me)　(1,2-ethanediyl-bis-(dodecyldimethylammonium　bromide)).　The　aggregate　morphology　strongly　depends　on　the　added　amount　of　the　organic　salts.　Among　the　various　aggregates,　the　elongated　micelle　and　the　tubular　aggregate　have　larger　solubilizing　capacities　than　those　with　the　other　morphologies.　However,　SNphs　and　SBzs　cannot　induce　similar　aggregate　transitions　for　the　systems　of　C12C5C12(Me)　(s　=　6,　8,　12).　The　possible　mechanism　of　these　phenomena　is　proposed　based　on　the　results　of　UV　spectra　and　H-1　NMR　measurements　and　the　molecular　packing　geometry　rule.　(C)　2009　Elsevier　Inc.　All　rights　reserved.