Struktura i svojstva poli(1,4-dinitrozobenzena) u čvrstoj fazi, na organiziranim površinama i u otopini

doctoral thesis

• Title (english): Structure and properties of poly(1,4-phenyleneazine-n,n’-dioxide) in solid state, organized surfaces and solution
• Author: Ana Mihanović
• Mentor: Hrvoj Vančik (mentor)
• Committee member: Tajana Begović (predsjednik povjerenstva)
• Committee member: Olga Kronja (član povjerenstva)
• Committee member: Davor Margetić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Chemistry); Zagreb
• Defense date and country: 2022-03-04, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Chemistry
• Universal decimal classification (UDC): 54 - Chemistry. Crystallography. Mineralogy

Abstract

U ovoj disertaciji istražena je struktura i svojstva polimera 1,4-dinitrozobenzena. Razvijena je metoda sinteze ovog polimera kojom su dobiveni mikrokristali dovoljne kvalitete za određivanje molekularne i kristalne strukture. Polimer je sustavno istražen nizom spektroskopskih metoda, IR, 13C i 15N NMR, kinetika polimerizacije je ispitana u otopini, a njegova je otpornost ispitana TGA metodama u različitim atmosferama. Polazeći od dobivene molekulske i kristalne strukture izračunata je elektronska struktura, te se je pokazalo da se ovaj materijal može ponašati kao poluvodič. Budući da bi takav poluvodič načelno mogao poslužiti u razvoju molekulske elektronike, ispitano je njegovo nastajanje oligomerizacijom na uređenim površinama. Duljina tih oligomernih lanaca od prosječno 20 jedinica, kao i struktura takve površine analizirana je AFM i STM mikroskopijom.

Abstract (english)

The scope of this Thesis is the detailed investigation of the structure and properties of the polymer of 1,4-dinitrosobenzene. The polymer is prepared with the newly developed method which provided the microcrystals of the satisfactory quality, such that its molecular and crystal structure is resolved by X-ray powder diffraction. The polymer is systematically analized using a series of spectroscopic methods (IR, 13C and 15N NMR), its polymerization kinetics is investigated in solution, and its robustnes is studied by thermogravimetric methods in different atmospheres. Electronic structure of the polymer is calculated starting with the obtained crystal and molecular structure. It was shown that this polymer could have properties of organic semiconductor. The ability to form regular supramolecular structures on the ordered surfaces is investigated by AFM and STM techniques. The oligomers formed on the gold surface consist from 20 monomeric units in average.

• Keywords: aromatski C-nitrozo-spojevi; polimerizacija; poluvodič; samoudruženi molekularni slojevi na zlatu
• Keywords (english): aromatic C-nitroso-compounds; polymerization; semiconductor; self-assembled molecular layers on gold
• Language: croatian
• URN:NBN: urn:nbn:hr:217:079760
• Promotion: 2022
• Study programme: Title: Doctoral study in chemistry; Study programme type: university; Study level: postgraduate; Academic / professional title: doktor/doktorica znanosti, područje prirodnih znanosti, polje kemija (doktor/doktorica znanosti, područje prirodnih znanosti, polje kemija)
• Type of resource: Text
• Extent: 106 str. ; 30 cm
• File origin: Born digital
• Access conditions: Open access
• Created on: 2022-03-11 10:48:19