Cationic Polythiophene-Surfactant Self-Assembly Complexes: Phase Transitions, Optical Response, and Sensing

被引：79

作者：

Evans, Rachel C. ^{[1
]}

Knaapila, Matti ^{[2
]}

Willis-Fox, Niamh ^{[1
]}

Kraft, Mario ^{[3
]}

Terry, Ann ^{[4
]}

Burrows, Hugh D. ^{[5
]}

Scherf, Ullrich ^{[3
]}

机构：

[1] Trinity Coll Dublin, Sch Chem, Dublin 2, Ireland

[2] Inst Energy Technol, Phys Dept, NO-2027 Kjeller, Norway

[3] Berg Univ Wuppertal, Fachbereich Chem, D-42097 Wuppertal, Germany

[4] Rutherford Appleton Lab, Sci & Technol Facil Council, ISIS Facil, Didcot OX11 0QX, Oxon, England

[5] Univ Coimbra, Dept Quim, P-3004535 Coimbra, Portugal

来源：

LANGMUIR | 2012年 / 28卷 / 33期

关键词：

SODIUM DODECYL-SULFATE; CONJUGATED POLYELECTROLYTE CPE; AQUEOUS-SOLUTION; ENERGY-TRANSFER; SURFACTOCHROMIC PROPERTIES; FLUORINATED AMPHIPHILES; WATER; POLYMERS; FLUORESCENT; AGGREGATION;

D O I：

10.1021/la302166a

中图分类号：

O6 [化学];

学科分类号：

070301 [无机化学];

摘要：

The absorption and photoluminescence spectra of the cationic conjugated polyelectrolyte poly[3-(6-trimethylammoniumhexyl)thiophene] (P3TMAHT) were observed to be dramatically altered in the presence of anionic surfactants due to self-assembly through ionic complex formation. Small-angle neutron scattering (SANS), UV/vis, and photoluminescence spectroscopy were used to probe the relationship between the supramolecular complex organization and the photophysical response of P3TMAHT in the presence of industrially important anionic surfactants. Subtle differences in the surfactant mole fraction and chemical structure (e.g., chain length, headgroup charge density, perfluorination) result in marked variations in the range and type of complexes formed, which can be directly correlated to a unique colorimetric and fluorimetric fingerprint. Our results show that P3TMAHT has potential as an optical sensor for anionic surfactants capable of selectively identifying distinct structural subgroups through dual mode detection.

引用

页码：12348 / 12356

页数：9

共 54 条

[1]

Disassembly-driven colorimetric and fluorescent sensor for anionic surfactants in water based on a conjugated polyelectrolyte/dye complex [J].