Mehanokemijska priprava metaloorganskih katalizatora depolimerizacijom otpadnog poli(etilen-tereftalata)

master's thesis

• Title (english): Mechanochemical synthesis of metal organic catalysts by depolymerization of waste polyethylene terephthalate
• Author: Stjepan Dorić
• Mentor: Vjekoslav Štrukil (mentor)
• Committee member: Vesna Petrović Peroković (predsjednik povjerenstva)
• Committee member: Adriana Kenđel (član povjerenstva)
• Committee member: Biserka Prugovečki (član povjerenstva)
• Committee member: Željka Car (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Chemistry); Zagreb
• Defense date and country: 2022-04-12, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Chemistry

Abstract

Poli(etilen-tereftalat) je termoplastika izgrađena od tereftalne kiseline (benzen-1,4-dikarboksilne
kiseline) i etilen-glikola koja se primjenjuje u proizvodnji plastičnih boca. U okviru diplomskog
rada korištena je nedavno razvijena metoda mehanokemijske depolimerizacije otpadnog poli(etilentereftalata) u svrhu dobivanja natrijevog tereftalata korištenog za pripravu funkcionalnih
metaloorganskih mreža, poroznih materijala iz skupine koordinacijskih polimera sa širokim
područjem primjene. Pripravljeni su koordinacijski polimeri M2(BDC)2(L) sa različitim metalnim
centrima (M = Cu, Zn, Co, Ni), 1,4-benzendikarboksilatnim ionom (BDC) i 4,4'-bipiridinom ili 1,8-
diazabiciklo[2.2.2]oktanom kao premošćujućim ligandima (L). Ispitana je katalitička aktivnost
pripravljenih metaloorganskih mreža na modelnoj reakciji priprave 2-fenilkinoksalina iz 1,2-
fenilendiamina i 2-hidroksiacetofenona, a nakon optimizacije uvjeta pripravljeno je nekoliko 2,3-
diaril-supstituiranih kinoksalinskih derivata. Metaloorganske mreže okarakterizirane su
infracrvenom spektroskopijom (IR) i termogravimetrijskom analizom (TGA), a pripravljeni
kinoksalinski derivati potvrđeni su spektroskopijom NMR (1H i 13C) i infracrvenom
spektroskopijom.

Abstract (english)

Polyethylene terephthalate (PET) is a thermoplastic made of terephthalic acid (benzene-1,4-
dicarboxylic acid) and ethylene glycol used in the production of plastic bottles. In this diploma
thesis, a recently developed method for the mechanochemical depolymerization of waste PET will
provide sodium terephthalate as the source of ligand for the synthesis of functional metal-organic
frameworks (MOFs), porous coordination polymers with a wide range of applications. Coordination
polymers M2(BDC)2(L), with different metal centers (M = Cu, Zn, Co, Ni), 1,4-
benzenedicarboxylate ion (BDC) and 4,4'-bipyridine or 1,8-diazabicyclo[2.2.2]octane as bridging
ligands (L), have been prepared. The catalytic activity of the prepared MOFs was investigated on
preparation of 2-phenylquinoxaline from 1,2-phenylenediamine and 2-hydroxyacetophenone as a
model reaction, and after optimizing the reaction conditions, several 2,3-diaryl-substituted
quinoxaline derivatives were prepared. MOFs were characterized by infrared spectroscopy (IR) and
thermogravimetric analysis (TGA), and the prepared quinoxaline derivatives were confirmed by
NMR spectroscopy (1H and 13C) and infrared spectroscopy.

• Keywords: depolimerizacija; katalizatori; kinoksalini; mehanokemija; metaloorganske mreže; plastika; poli(etilen-tereftalat)
• Keywords (english): catalysts; depolymerization; mechanochemistry; metal-organic frameworks; plastics; poliethylene terephthalate; quinoxalines
• Language: croatian
• URN:NBN: urn:nbn:hr:217:597591
• Project: Number: IP-2018-01-3298; Title: Cikloadicijske strategije prema policikličkim gvanidinima; Acronym: CycloGu; Leader: Davor Margetić; Jurisdiction: Croatia; Funder: HRZZ; Funding stream: IP
• Study programme: Title: Graduate university studies in chemistry; specializations in: Research programme; Course: Research programme; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra kemije (magistar/magistra kemije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access; Embargo expiration date: 2024-04-12
• Created on: 2022-05-02 12:05:57