Light-Responsive Self-Assembled Materials by Supramolecular Post-Functionalization via Hydrogen Bonding of Amphiphilic Block Copolymers

Oriol Langa, Luis Teodoro (Universidad de Zaragoza) ; Piñol, Milagros (Universidad de Zaragoza) ; Nogales, A ; Concellón, A. (Universidad de Zaragoza) ; Blasco, E. ; Martínez-Felipe, A. ; Martínez, J. C. ; Šics, I. ; Ezquerra, T. A.

Resumen: A new class of light-responsive supramolecular amphiphilic block copolymers (BCs) based on the association through multiple H-bonding between 4-isobutyloxyazobenzene motifs and 2, 6-diacylaminepyridine units is reported. Block copolymers containing 2, 6-diacylaminopyridine side units, as hydrophobic block, and poly(ethylene glycol), as a hydrophilic segment, were functionalized with either a carboxylic acid azodendron, via double H-bonding, or a thymine azobenzene, via triple H-bonding. The structural and thermal characterization of these supramolecular azo-copolymers in bulk and solution is presented. The work emphasizes the self-assembly of these supramolecular polymers in water and the study of their UV-light responsive properties by UV-vis spectroscopy, dynamic light scattering (DLS), transmission electron microscopy (TEM), and synchrotron small-angle X-ray (SAXS). The present noncovalent postpolymerization functionalization strategy has provided stable self-assemblies in water with light responsive properties that can be used to load and trigger the delivery of small fluorescent molecules.

Idioma: Inglés

DOI: 10.1021/acs.macromol.6b01112

Año: 2016

Publicado en: MACROMOLECULES 49, 20 (2016), 7825-7836
ISSN: 0024-9297

Factor impacto JCR: 5.835 (2016)

Categ. JCR: POLYMER SCIENCE rank: 5 / 85 = 0.059 (2016) - Q1 - T1

Factor impacto SCIMAGO: 2.564 - Inorganic Chemistry (Q1) - Polymers and Plastics (Q1) - Organic Chemistry (Q1) - Materials Chemistry (Q1)

Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2014-55205-P
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2014-59187-R

Tipo y forma: Artículo (PostPrint)

Área (Departamento): Área Química Orgánica (Dpto. Química Orgánica)