Studies On Intercalation Assembly, Characterization And Properties Of Rare Earth Organic Complexes-Montmorillonite Supramolecular Composite Luminescent Materials

Rare earth organic complexes have always attracted many attentions in coordination chemistry and rare earth luminescent materials. And it is demonstrated that the complexes may be widely applied in analytic chemistry, medicine, life science, fluorescent probe and luminescent devices for their special luminescence mechanism and good luminescent properties. But their applications are limited by the poor optical, thermal and chemical stabilities. Stable inorganic solid matrices, particularly the ordered rigid inorganic media hosts, which can change the structure and chemical microenvironment of guest molecules or ions, could affect the luminescent properties of guest molecules or ions distinctly. So the hybrid of the rare earth organic complexes with suitable inorganic solid matrices is a desirable way to improve the luminescent properties and the stabilities of the complexes, develop novel rare earth luminescent materials and widen their application field. Up to now, many kinds of rare earth complex-inorganic matrices composite luminescent materials have been prepared by assembling the complexes into sol-gels, zeolites, α-ZrP and LDHs. We intercalate rare earth luminescent complexes into the interlayer space of montmorillonite (MT) for the first time and obtain novel rare earth organic complex-MT supra -molecular composite luminescent materials.This dissertation includes following four parts:1. A brief review on the research developments of the rare earth organic complex-inorganic matrices supramolecular composite luminescent materials is given.2. Multipodal ligands L^1-6L^1-4 are new), bidentate bipyO₂ and their complexes of Eu³⁺ and Tb³⁺ ions and ternary complexes EuL⁶₃(bipyO₂)·H₂O, EuL⁶₃(phen)·H₂O and EuL⁶₃L⁵·3H₂O were synthesized and characterized by elemental analysis, IR, ¹H NMR and molar conductivities. The results show that the molar ratios of RE:L are 1:1 and the RE³⁺ were included in the cage cavity of multipodal ligands L^1-4 in the complexes.3. Above mentioned complexes were intercalated into the interlayer space of MT by solid-liquid or solid-solid ion exchanging and coordination reaction of ligands with the Eu³⁺ or Tb³⁺ ions existed in the interlayer space of Eu-MT or Tb-MT respectively. The obtained supramolecular composite luminescent materials were characterized by elemental analysis, XRD, IR and UV-vis spectra. The results show that the guest complex ions arranged in the interlayer space of MT in the formation of a monolayer and the composite materials formed through the supramolecular interactions between the host layers and the guest complex ions had regular layered structure. The interaction between the host and guest can distinctly changed the conjugation and rigidity of the ligands, which may affect the luminescent properties of the composite materials. Moreover, electro neutral ternary rare earth complexes were intercalated into...