Sinteza i rendgenska strukturna analiza metaloorganskih mreža cinka(II) s 4,4'-bipiridinom i aminokiselinama

master's thesis

• Title (english): Synthesis and X-ray structural analysis of metal-organic frameworks of zinc(II) with 4,4'-bipyridine and amino acids
• Author: Valentina Idek
• Mentor: Biserka Prugovečki (mentor)
• Mentor: Darko Vušak (komentor)
• Committee member: Biserka Prugovečki (predsjednik povjerenstva)
• Committee member: Adriana Kenđel (član povjerenstva)
• Committee member: Đani Škalamera (član povjerenstva)
• Committee member: Ivica Đilović (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Chemistry); Zagreb
• Defense date and country: 2022-12-20, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Chemistry

Abstract

U sklopu ovog diplomskog rada otopinskom sintezom su priređene četiri nove 3D
metaloorganske mreže (MOF-ovi) cinka(II) s 4,4'-bipiridinom (bipy) i L-treoninom (HThr) ili
L-serinom (HSer): {[Zn4(μ-Thr)4(H2O)(μ-bipy)4(DMF)](NO3)4∙(DMF/H2O)}n (1 i 2), {[Zn2(μThr)2(μ-bipy)3](NO3)2∙2bipy∙2H2O)}n (3) i {[Zn2(µ-Ser)2(µ-bipy)3](NO3)2(DMF/H2O)}n (4).
Difrakcijom rendgenskog zračenja na jediničnom kristalu određene su molekulske i kristalne
strukture MOF-ova 1 – 4 te je istražen način vezanja L-treonina, L-serina i 4,4'-bipiridina na
cink. Aminokiseline se u MOF-ovima koordiniraju na cinkove atome na tri načina:
monodentatno, didentatno (kelatno) te tridentatno. 4,4'-Bipiridin i aminokiseline se u svim
MOF-ovima ponašaju kao premošćujući ligandi. U spojevima se nalaze beskonačni 2D kanali
kristalizacijskih molekula otapala (voda ili DMF) i nekoordiniranih iona ili molekula (nitratnih
iona i/ili 4,4’-bipiridina) s volumnim udjelima u jediničnoj ćeliji od 36,8 − 50,6 %. MOF 3 je
dodatno okarakteriziran infracrvenom spektroskopijom te termogravimetrijskom analizom.

Abstract (english)

As a part of this diploma thesis, four new 3D metal-organic frameworks (MOFs) of zinc(II)
with 4,4'-bipyridine (bipy) and L-threonine (HThr) or L-serine (HSer) were synthesized by
solution method: {[Zn4(μ-Thr)4(H2O)(μ-bipy)4(DMF)](NO3)4∙(DMF/H2O)}n (1 i 2), {[Zn2(μThr)2(μ-bipy)3](NO3)2∙2bipy∙2H2O)}n (3) and {[Zn2(µ-Ser)2(µ-bipy)3](NO3)2·(DMF/H2O)}n
(4). The molecular and crystal structures of MOFs 1 − 4 were solved by the single-crystal Xray diffraction method and the mode of binding of L-threonine, L-serine, and the 4,4’-bipyridine
on the zinc atoms has been explored. Amino acids are coordinated to the zinc atoms as
monodentate, bidentate (chelating) or tridentate ligands. In all MOF-s, the 4,4’-bipyridine and
amino acids are bridging ligands. Water or DMF solvent molecules and uncoordinated ions or
molecules (nitrate ions and/or 4,4’-bipyridine) were captured in 2D channels of all four MOFs
with a volume fraction of 36.8 − 50.6%. The MOF 3 is additionally characterized by infrared
spectroscopy and thermogravimetric analysis.

• Keywords: 4; 4'-bipiridin; difrakcija rendgenskog zračenja; kompleksi cinka(II); L-serin; L-treonin; metaloorganske mreže; rendgenska strukturna analiza
• Keywords (english): 4; 4'-bipyridine; L-serine; L-threonine; metal-organic framworks; single-crystal X-ray diffraction; Zn(II) complexes; X-ray structural analysi
• Language: croatian
• URN:NBN: urn:nbn:hr:217:358305
• 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: Embargoed access; Embargo expiration date: 2024-12-20
• Created on: 2023-01-13 13:18:03