RT Generic
T1 Polímeros Helicoidales Supramoleculares
A1 Nogueira Blanco, Carlos
K1 Complejo supramolecular
K1 Polímeros helicoidales supramoleculares
K1 Síntesis de macromoléculas
AB Supramolecular chemistry is a broad area of study, whose development in recent yearshas been exponential due to the promising applications of these materials, as well as anincreasing number of specialized research groups. Supramolecular helical polymers arepostulated as a viable solution to the scientific community's need to synthesize nonnatural macromolecules that replicate the behavior, and consequently the functions, ofbiomolecules in living organisms. These materials are mainly characterized by amodulable and reversible self-assembly and may submit a helical conformationresponsible for providing the aggregate with optical activity. Moreover, the real relevanceof this type of materials lies in the possibility of modulating their helicity (direction ofrotation of the helix) by subjecting them to certain external stimuli (solvent polarity,temperature, pH, etc.), which makes it possible to control their optical activity by meansof a stimulus-response system.For this work, a precursor monomer was synthesized and characterized, which wassubsequently subjected to aggregation studies. The result was the obtaining andcharacterization of a stable supramolecular helical polymer with photochemical responsecapacity thanks to the incorporation of an azobenzene subunit, which allows the E-Zequilibrium to be modified in a simple way. This helical aggregate was prepared from achiral precursor monomer derived from L-Valine to which a π-conjugated OPE subunitis covalently associated, which confers stiffness to the system, favoring self-assembly bymeans of π-π interactions.To study the secondary structure of the supramolecular helical polymer obtained,several structural and optical characterization techniques were used, such as MassSpectrometry, Nuclear Magnetic Resonance (NMR), Polarimetry, Circular Dichroism(CD), Ultraviolet (UV-Vis) and Fourier Transform Infrared (FT-IR) AbsorptionSpectroscopy, Dynamic Light Scattering (DLS), RAMAN and Scanning ElectronMicroscopy (SEM). The information reported by these techniques will be used to describeand clarify the assembly mechanism adopted by the aggregate, as well as its behaviour inresponse to light and thermal stimuli.
YR 2022
FD 2022-07
LK http://hdl.handle.net/10347/29655
UL http://hdl.handle.net/10347/29655
LA spa
NO Traballo de Fin de Máster en Investigación Química e Química Industrial. Curso 2021-2022
DS Minerva
RD 19 abr 2026