Koordinacijski polimeri i polioksometalatni hibridi molibdena(VI)

master's thesis

• Title (english): Molybdenum(VI) coordination polymers and polyoxometalate hybrides
• Author: Nikol Bebić
• Mentor: Višnja Vrdoljak (mentor)
• Committee member: Višnja Vrdoljak (predsjednik povjerenstva)
• Committee member: Iva Juranović Cindrić (član povjerenstva)
• Committee member: Tomica Hrenar (član povjerenstva)
• Committee member: Jana Pisk (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Chemistry); Zagreb
• Defense date and country: 2020-09-30, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Chemistry

Abstract

Potaknut raznolikošću struktura i potencijalnom primjenom u različitim područjima, ovaj
diplomski rad opisuje sintezu koordinacijskih polimera i poliksometalatnih hibrida. Sinteze su
provedene koristeći dioksobis(pentan-2,4-dionato)molibden(VI) i jedan od četiri
izo(nikotinhidrazidna) derivata 2,3- ili 2,4-dihidroksibenzaldehida. Dva porozna
koordinacijska polimera dobivena su odabirom otapala koje može ostvariti vodikove veze s
lancima polimera. Dodatno je ispitana strukturna transformacija jednog od njih koja je
potvrdila značaj veličine šupljina u strukturi na produkt transformacije. Nađeni su i uvjeti koji
pogoduju nastanku hibridnih polioksometalata, te su pripravljene četiri heksamolibdatne soli i
četiri oktamolibdatne soli. Pored različitog stupnja deprotoniranosti liganda u kompleksnim
kationima, dobiven je i hibrid s protoniranim hidrazonom kao kationom. Svi produkti
okarakterizirani su na temelju IR spektroskopije, a kada su izolirani homogeni produkti ili pak
monokristali, napravljene su termogravimetrijske analize i difrakcija rentgenskog zračenja.
Otopine liganada i koordinacijskih polimera analizirane su spektroskopijom NMR.

Abstract (english)

Prompted by the diversity of structures and potential application in different areas, this
diploma thesis describes synthesis of coordination polymers and polyoxometalate hybrids.
Syntheses were carried out using dioxobis(pentane-2,4-dionato)molybdenum(VI) and one of
four iso(nicotinoylhydrazide) derivatives of 2,3- or 2,4-dihydroxybenzaldehyde. Two porous
coordination polymers were obtained by selecting a solvent that has hydrogen bonding
capability with chains of polymers. Additionally, structural transformation of one of them was
examined. This confirmed the importance of cavity size within the crystal structure on the
final product formation. Conditions that favour the formation of hybrid polyoxometalates
were also found and four hexamolybdate and four octamolybdate salts were prepared. In
addition to the different degree of deprotonation of the ligand in complex cations, a hybrid
with a protonated hydrazone as a cation was obtained. All products were characterized on the
basis of IR spectroscopy and, when homogeneous products or single crystals were isolated,
thermogravimetric analyses and X-ray diffraction method. Solutions of ligands and
coordination polymers were analyzed by NMR spectroscopy.

• Keywords: heksamolibdat; hidrazon; koordinacijski polimer; oktamolibdat; poliksometalat
• Keywords (english): coordination polymer; hexamolybdate; hydrazone; octamolybdate; polyoxometalate
• Language: croatian
• URN:NBN: urn:nbn:hr:217:652003
• 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: 2022-10-01
• Created on: 2020-10-15 12:28:11