RT info:eu-repo/semantics/article
T1 Polymer chemosensors as solid films and coated fibres for extreme acidity colorimetric sensing
A1 Pablos, Jesús Luis
A1 Estévez Bolívar, Pedro Antonio
A1 Muñoz Santamaría, María Asunción
A1 Ibeas Cortes, Saturnino
A1 Serna Arenas, Felipe
A1 García García, Félix Clemente
A1 García Pérez, José Miguel
K1 Química orgánica
K1 Chemistry, Organic
AB We have designed and successfully prepared polymer membranes as manageable films for colorimetric sensor materials for the visual detection of the acidity of water in the low pH range, below 4, and beyond the pH scale, up to a concentration of 11.6 M of perchloric acid. For this purpose, two monomers with weakly basic groups were synthesised, with these monomers containing up to four protonisable groups in the aforementioned acidic regions. The pKa values were calculated for the membranes in water, which exhibited gel behaviour, and ranged between 2.7 and −6.5. Accordingly, visual colour changes qualitatively indicated the acidity of water containing perchloric acid, and the quantification was performed inexpensively by UV/Vis spectroscopy. Titration with other acids is foreseen for practical applications. Moreover, polymer coatings of conventional cotton and high-tech p-aramid fibres, using the designed sensor monomers, yielded smart fabrics, which responded colorimetrically to the acidity of the water media. Furthermore, both membranes and smart fibres exhibited colour changes in air under acidic atmospheres, demonstrating the future development of fully sensory apparels and smart tags with envisaged health and safety applications. In addition, the sensor materials are reusable, because the protonation under acidic conditions is reverted by washing with water, and are highly stable under acidic conditions for long periods of time.
PB Royal Society of Chemistry
SN 2050-7488
YR 2015
FD 2015
LK http://hdl.handle.net/10259/8547
UL http://hdl.handle.net/10259/8547
LA eng
NO We gratefully acknowledge the financial support provided by the Spanish Ministerio de Economía y Competitividad-Feder (MAT2011-22544 and MAT2014-54137-R) and by the Consejería de Educación – Junta de Castilla y León (BU232U13).
DS Repositorio Institucional de la Universidad de Burgos
RD 11-may-2024