Synthesis And Properties Of Iminodiacetic Acid Derivatives-Based Metal-Origanic Frameworks

In recent years, the design and synthesis of Metal-Organic Frameworks (MOFs) have received enormous interest, owing to their various interesting structures, significant properties and potential applications in luminescence, electricity, magnetism, adsorption and catalysis. Until now, a great number of MOFs have been obtained. However, amino acid and nucleobases-based MOFs are still rare. In this dissertation,14complexes based on two iminodiacetic acid derivatives have been synthesised. The subject of the dissertation is to fully understand the relationship between assembly strategy and structure of Metal-Organic Frameworks.First of all, A series of lanthanide Metal-Organic Frameworks have been obtained through the hydrothermal reaction of N-(sulfoethyl) iminodiacetic acid (H3SIDA) and Ln(NO3)3(Ln=La, Pr, Nd, Gd,). Crystal structure analysis exhibits that lanthanide ions affect the coordination number, bond length and dimension of four compounds. Furthermore, the combination of magnetic measure with quantum Monte Carlo (QMC) studies reveals weak antiferromagnetic interaction in [Gd(SIDA)(H2O)2]·H2O.Secondly, a range of transition Metal-Organic Frameworks have been obtained through the reaction of2,5-piperazinedione-1,4-diacetic acid (H2PODC) and Tm ions (Tm=Fe、Co、Mn、Cu、Ag、Pb). Crystal structure analysis reveals that [Tm(PODC)(H2O)2](Tm=Mn, Fe, Co) have isomorphic three-dimensional framework and [Cu(PODC)(H2O)2] displays two-dimensional plane structure. In compound [Ag2(PODC)] and [Pb(PODC)(H2O)]·(4(H2O), H2PODC ligand exhibits a different coordination mode from others, where carboxylate and carbonyl oxygens both participate in coordinating to metal ions. The magnetic measure reveals weak antiferromagnetic interaction in [Mn(PODC)(H2O)2] and ferrimagnetic interaction in [Co(PODC)(H2O)2].Finally, A series of alkaline earth metal-organic frameworks based on one cyclic dipeptide (H2PODC) were prepared under the same synthetical condition. Crystal analysis demonstrates that the metal ion radii play an important role in coordination number, coordination modes of ligand and bond length. In order to identify the mechanism of spectral transition, fluorescent spectra and UV-vis spectra combinded with DFT calculation are performed.