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master's thesis
Sinteza i karakterizacija polioksomolibdatnih soli Co(III)
Zagreb: University of Zagreb, Faculty of Science, 2020. urn:nbn:hr:217:199019
Eberhardt, Antonio
University of Zagreb
Faculty of Science
Department of Chemistry

Institutional repository: Repository of the Faculty of Science

Cite this document

Eberhardt, A. (2020). Sinteza i karakterizacija polioksomolibdatnih soli Co(III) (Master's thesis). Zagreb: University of Zagreb, Faculty of Science. Retrieved from https://urn.nsk.hr/urn:nbn:hr:217:199019

Eberhardt, Antonio. "Sinteza i karakterizacija polioksomolibdatnih soli Co(III)." Master's thesis, University of Zagreb, Faculty of Science, 2020. https://urn.nsk.hr/urn:nbn:hr:217:199019

Eberhardt, Antonio. "Sinteza i karakterizacija polioksomolibdatnih soli Co(III)." Master's thesis, University of Zagreb, Faculty of Science, 2020. https://urn.nsk.hr/urn:nbn:hr:217:199019

Eberhardt, A. (2020). 'Sinteza i karakterizacija polioksomolibdatnih soli Co(III)', Master's thesis, University of Zagreb, Faculty of Science, accessed 16 May 2024, https://urn.nsk.hr/urn:nbn:hr:217:199019

Eberhardt A. Sinteza i karakterizacija polioksomolibdatnih soli Co(III) [Master's thesis]. Zagreb: University of Zagreb, Faculty of Science; 2020 [cited 2024 May 16] Available at: https://urn.nsk.hr/urn:nbn:hr:217:199019

A. Eberhardt, "Sinteza i karakterizacija polioksomolibdatnih soli Co(III)", Master's thesis, University of Zagreb, Faculty of Science, Zagreb, 2020. Available at: https://urn.nsk.hr/urn:nbn:hr:217:199019

Metadata
TitleSinteza i karakterizacija polioksomolibdatnih soli Co(III)
Title (english)Synthesis and characterisation of Co(III) polyoxomolybdate salts
AuthorAntonio Eberhardt
MentorMarina Cindrić (mentor)
Committee memberVišnja Vrdoljak (predsjednik povjerenstva)
Committee memberIva Juranović Cindrić (član povjerenstva)
Committee memberIvan Kodrin (član povjerenstva)
Committee memberJana Pisk (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Science
(Department of Chemistry)
Zagreb
Defense date and country2020-02-21, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Chemistry
Abstract
U ovom diplomskom radu ispitivane su reakcije natrijeva molibdata dihidrata (NaMoO4·2H2O) s kompleksnom soli [CoCO3(NH3)4]NO3 uz zakiseljavanje s oksalnom ili klorovodičnom kiselinom. Reakcije su izvedene u otopini na sobnoj temperaturi i hidrotermalno pri 110 ̊C u trajanju od 1,5 h. Produkti su karakterizirani pomoću rentgenske difrakcije, IR spektroskopije, termogravimetrijske i kemijske analize. U reakcijama s klorovodičnom kiselinom dobivena je smjesa praškastih produkata. Reakcije s oksalnom kiselinom dale su tri kristalna produkata, pri čemu su dva bila kompleksne soli kobalta i polioksomolibdata, a treći je bila sol Co(II)/Co(III). Zaključeno je da su stehiometrijski omjer i koncetracije reaktanata, ali i pH ključni faktori pri nastajanju dotičnih produkata. Izolirani su i karakterizirani slijedeći produkti: 3Na[CoC2O4(NH3)4][Mo2O4(μ-O)2(C2O4)2], [CoC2O4(NH3)4]4[Mo3O6(μ-O)2(C2O4)3(H2O)2]·nH2O i [CoIIIC2O4(NH3)4]2[CoII(C2O4)2(H2O)2]·4H2O.
Abstract (english)
In this diploma thesis the reactions of sodium molybdate dihydrate (Na2MoO4·2H2O) with a complex salt [CoCO3(NH3)4]NO3 acidified with oxalic or hydrochloric acid were investigated. Reactions were performed in solution at room temperature and hydrothermally at 110 ̊C in duration of 1,5 h. Products were characterised with X-ray diffraction, IR spectroscopy, thermogravimetric and chemical analysis. Reactions with hydrochloric acid yielded a mixture of amorphous products. Reactions with oxalic acid have yielded three crystalline products, two of which were complex salts of cobalt and polyoxomolybdate and the third was complex salt of cobalt(II)/(III). It was concluded that the stechiometric ratio and the concentration of the reactants, along with pH are the key factors in producing these products. Following products were isolated and characterised: 3Na[CoC2O4(NH3)4][Mo2O4(μ-O)2(C2O4)2], [CoC2O4(NH3)4]4[Mo3O6(μ-O)2(C2O4)3(H2O)2]·nH2O i [CoIIIC2O4(NH3)4]2[CoII(C2O4)2(H2O)2]·4H2O.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:217:199019
Study programmeTitle: 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 resourceText
File originBorn digital
Access conditionsOpen access
Embargo expiration date: 2022-02-21
Terms of useLicence In copyright icon
Created on2020-03-05 17:27:19