Κατεύθυνση Επιστήμη Πολυμερών και Εφαρμογές τηςLibrary of the School of Science
Ερμόλαος Ιατρού, Καθηγητής, Τμήμα Χημείας, ΕΚΠΑ
Σύνθεση δισυσταδικών τριπολυμερών πολύ(αιθυλενοξειδίου)-b-πολύ(L-ιστιδίνη-co-γλυκίνη) και μελέτη της επίδρασης της L-γλυκίνης στη συσσωμάτωση και τη δευτεροταγή δομή
Synthesis of diblock terpolymer poly(ethylene oxide)-b-poly(L-histidine-co-glycine) and study of the effect of L-glycine on the aggregation and the secondary structure
The purpose of this thesis is the synthesis of diblocks containing L-Histidine, that possess the ability to respond to external stimuli by altering their structure. It is presented a novel method for the synthesis of Nim-Trt-L-Histidine NCA with Trityl protecting group, which gives the advantages of selective and easy deprotection and no racemization. Also the synthesis of glycine NCA took place. The successful synthesis of the monomers was confirmed with IR and NMR techniques. The successful synthesis of co-diblocks with addition of PGly in rates of 10%, 20% and 40% in relation with histidine in the second block of the polymers took place beginning with m-PEO-NH2 as macroinitiator in the first block. The ROP method for the polymerization of the NCAs of the aminoacids took place in combination with the use of high vacuum techniques. All polymers were characterized with GPC, NMR and IR techniques. The polymers have the ability of self-assembly by shaping in nanoscale micelles and clusters in water as solvent. This ability was confirmed with DLS. These polypeptides can respond in pH change. A study of the structure of the polymers took place by using circular dichroism. The different molds of the polymer were found by changing pH and temperature.
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Other subject categories:
polypeptides, NCAs, self-assembly, bioapplications