Identifikacija kompleksnih spojeva galija i aromatskih hidrazona spektrometrijom masa

master's thesis

• Title (english): Identification of gallium complexes with aromatic hydrazones by mass spectrometry
• Author: Tihana Njegovec
• Mentor: Nives Galić (mentor)
• Committee member: Nives Galić (predsjednik povjerenstva)
• Committee member: Biserka Prugovečki (član povjerenstva)
• Committee member: Ivana Biljan (član povjerenstva)
• Committee member: Snežana Miljanić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Chemistry); Zagreb
• Defense date and country: 2019-09-25, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Chemistry

Abstract

U ovom radu provedena je detaljna masenospektrometrijska analiza kompleksnih spojeva
galij(III) i aromatskih hidrazona pripravljenih iz nikotinohidrazida i salicilaldehida, odnosno
2-hidroksi-3-metoksi-, 2-hidroksi-4-metoksi- i 2-hidroksi-5-metoksibenzaldehida u sustavu
otapala metanol/voda. Kao ionizacija korišteno je elektroraspršenje, a kao analizator masa
trostruki kvadrupol. Analizirane su otopine kompleksa prireĎene na dva načina: (i)
miješanjem otopina galijeva(III) perklorata i navedenih aromatskih hidrazona pri čemu je
variran molarni omjer metala i liganda od 1:1 do 1:4 te (ii) otapanjem čvrstih kompleksnih
spojeva galija i aromatskih hidrazona. Spektri masa su u slučaju (i) snimljeni odmah po
pripravi otopina i nakon 24 sata. TakoĎer je ispitan utjecaj dodatka perklorne i klorovodične
kiseline na intenzitet signala u spektrima masa. Snimljeni su i MS/MS spektri odabranih iona,
a na temelju rezultata tandemne spektrometrije masa predložene su odgovarajuće sheme
fragmentiranja.

Abstract (english)

In this thesis a detailed mass spectrometric analysis of gallium(III) complexes with aromatic
hydrazones derived from nicotinic acid hydrazides and salicylaldehyde, namely 2-hydroxy-3-
methoxy-, 2-hydroxy-4-methoxy- and 2-hydroxy-5-methoxybenzaldehyde in methanol/water
system was performed. Electrospray was used for ionization, and triplequadrupole as mass
analyzer. The solutions of complexes were prepared in two different ways: (i) by mixing
solutions of gallium(III) perchlorate and aromatic hydrazones in different molar ratio from 1:1
to 1:4 and (ii) by dissolving solid complexes of gallium(III) and hydrazones. In case of (i) MS
spectra were recorded immediately after the preparation of solutions and after 24 hours. The
addition of perchloric or hydrochloric acid on signals intensities in mass spectra were
examined as well. MS/MS spectra of selected ions were acquired and corresponding
fragmentation schemes were proposed.

• Keywords: aroilhidrazoni; fragmentacija; galij; spektrometrija masa
• Keywords (english): aroylhydrazones; fragmentation; gallium; mass spectrometry
• Language: croatian
• URN:NBN: urn:nbn:hr:217:312616
• 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: 2021-09-25
• Created on: 2019-10-03 09:34:34