1. Structural and degradation studies of a biocompatible Zn-L-tartrate metal-organic frameworkJosip Bronić, Nataša Zabukovec Logar, Emanuela Žunkovič, Matjaž Mazaj, Andreas Puškarić, Ana Palčić, 2015 Povzetek: New anhydrous Zn-l-tratrate was synthesized under hydrothermal conditions. Crystal structure which was solved by powder X-ray diffraction data from monoclinic unit cell (I2, a=11.7557(1), b=9.0319(1), c=5.0750(1), β=91.920(1)) consists of the three-dimensional framework where each Zn atom coordinates four tartrate ligands in distorted octahedral geometry. Due to its biocompatible components, the degradation of material was studied in aqueous media under different pH values (pH=1–7) and in the simulated body fluid (pH=7.4) performed by the measurement of the released Zn2+ concentrations at thermostatic conditions (37 °C). The results showed that under acidic conditions approximately 60% of Zn2+ is released from the investigated material after 6 h of degradation process. With the increase of the solution’s pH, the rate of degradation gradually decreases. XRD and SEM analyses indicate that in aqueous media the compound slowly disintegrates and does not undergo hydrolysis process regardless of pH. Biocompatibility of the compound and its controllable rate of degradation even in acid conditions open its potential use in the fields of bio-applications.
Graphical abstract
The degradation kinetics of Zn-l-tar MOF material in aqueous media at different pH conditions.
Full-size image (24 K)
Ključne besede: Zn-tartrate, coordination polymers, hydrothermal synthesis, biomedical application, food supplement
DiRROS - Objavljeno: 26.01.2015; Ogledov: 3831; Prenosov: 234 |
2. New insights into manganese local environment in MnS-1 nanocrystalsAlenka Ristić, Matjaž Mazaj, Iztok Arčon, Nina Daneu, Nataša Zabukovec Logar, Roger Gläser, Nataša Novak Tušar, 2019 Ključne besede: MnS-1 nanocrystals, Mn XANES, EXAFS, zeolites, microwave-assisted hydrothermal synthesis
DiRROS - Objavljeno: 23.11.2020; Ogledov: 3115; Prenosov: 139
 Celotno besedilo (9,32 MB) |
3. Structural and CO [sub] 2 capture properties of ethylenediamine-modified HKUST-1 metal-organic frameworkNika Vatič, Matjaž Mazaj, Gianpiero Buscarino, Angela Terracina, Simonpietro Agnello, Iztok Arčon, Janez Kovač, Nataša Zabukovec Logar, 2020 Ključne besede: functionalization, modification, adsorption, extended X-ray absorption fine structure, materials
DiRROS - Objavljeno: 25.11.2020; Ogledov: 325; Prenosov: 163
Celotno besedilo (3,94 MB) |
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