title: Effect of amphiphilic molecules upon chromatic transitions of polydiacetylene vesicles in aqueous solutions.
abstract: Effect of amphiphilic molecules upon the chromatic transitions of polymerized 10,12-pentacosadiynoic acid (PCDA) vesicles in aqueous solutions was reported. The colorimetric response of polymerized PCDA vesicles for 1-pentanol is higher than that for ethanol due to more hydrophobic property of 1-pentanol. The colorimetric response of polymerized PCDA vesicles for sodium dodecyl sulfate (SDS) and Triton X-100 is lower than that for cetyltrimethylammonium bromide (CTAB). The strong ability of CTAB to induce chromatic transition of the vesicles is related to the positively charged headgroups of CTAB, which favors approach of CTAB to the negatively charged carboxylate groups at the vesicle surface. The insertion of alkyl chain of CTAB into the hydrophobic domain perturbs the conformation of the conjugated polymer backbone and induces color change of polydiacetylene vesicles. For a series of alkylamine hydrochloric salts, the longer the alkyl chain, the stronger the ability of alkylamine to induce chromatic transition of polydiacetylene vesicles.
authors.affiliation: Key Laboratory of Colloid and Interface Science, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Science, Beijing 100080, PR China.
authors.forename: Yan-lei
authors.initials: YL
authors.lastname: Su
authors.forename: Jin-ru
authors.initials: JR
authors.lastname: Li
authors.forename: Long
authors.initials: L
authors.lastname: Jiang
mesh_terms: D000114:Acetylene / Q000031:analogs & derivatives* / Q000737:chemistry*; D000077286:Cetrimonium; D002593:Cetrimonium Compounds / Q000737:chemistry; D003124:Colorimetry; D008823:Micelles; D017830:Octoxynol / Q000737:chemistry; D000439:Pentanols / Q000737:chemistry; D000078789:Polyacetylene Polymer; D011091:Polyesters / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D053279:Polyynes; D012967:Sodium Dodecyl Sulfate / Q000737:chemistry; D013056:Spectrophotometry, Ultraviolet; D013501:Surface-Active Agents / Q000737:chemistry*
chemical_list: D002593:Cetrimonium Compounds; D008823:Micelles; D000439:Pentanols; D000078789:Polyacetylene Polymer; D011091:Polyesters; D011108:Polymers; D013501:Surface-Active Agents; C500738:poly(10,12-pentacosadiynoic acid); D053279:Polyynes; C082361:polydiacetylene; D012967:Sodium Dodecyl Sulfate; D017830:Octoxynol; C024999:n-pentanol; D000114:Acetylene; D000077286:Cetrimonium