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Study on Structure and Properties of Polymers Based on Acyclic Polyether-bridged Schiff-base Ligands and Oxadiazole-thione Contained Ligands

Author: GengCuiHong
Tutor: DongYuBin
School: Shandong Normal University
Course: Inorganic Chemistry
Keywords: Acyclic Polyether 1, 3, 4-Oxadiazole-2-Thione Heterocyclic carboxylic acid Hydrothermal synthesis Photo [2+2] Cycloaddition
CLC: O621.13
Type: Master's thesis
Year: 2010
Downloads: 68
Quote: 1
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Abstract


The chemistry of organic-inorganic coordination polymers and supramolecular complexes has recently become an active area of increasing interest internationally. Self-assembly of organic ligands and inorganic metal ions is one of the most efficient and widely used approaches for the construction of organic-inorganic composite materials. Recently, remarkable progress has been made in the area of molecular inorganic-organic hybrid compounds. The synthesis and charaterization of infinite one-, two-, and three-dimensional networks have been an area of rapid growth. In the thesis, a series of novel acyclic polyether-bridged ligands and symmetry Schiff-base ligands have been synthesized and a series of novel double-armed organic ligands containing 1, 3, 4-oxadiazole-2-thione with -N as coordination sites have been synthesized.The coordination chemistry based on these new ligands and metal ions have been investigated under hydrothermal condition or solution reactions. Totally 31 new coordination compounds were prepared by solution reactions methods, and fully characterized by IR, elemental analysis and single-crystal X-ray diffraction. The solid state luminescent properties of selected coordination compounds were investigated primarily.1、Acyclic polyether-bridged schiff-base ligands were synthesized and their coordination chemistry with Cd(II) and Cu(II) salts were investigated.2、The coordination chemistry based on two-armed 1, 3, 4-oxadiazole-2-thione bridging organic ligands and inorganic Ag(I), Ni(II), Co(II) and Cd(II) salts has been investigated. Thirteen new supramolecular compounds were synthesized based on them. The results indicate that the bend angle between the two terminal N-donors of the ligands, the counter-anions, the coordination group have great influence on the final structure of the product. Their luminescent properties were investigated in the solid state.3、The coordination chemistry based on a novel 2-hydroxylquinoline-4-formyl with Zn(II), Mn(II), Co(II), Ni(II)and Cd(II) salts has been investigated under hydrothermal reaction. Eleven new supramolecular compounds were synthesized based on them. The primary investigation on the in situ reaction under light was made. Their luminescent properties were investigated in the solid state.4、The coordination chemistry based on 1, 3, 4-oxadiazole bridging semi-rigid carboxylic acid ligands and potential functional transitional Pb(II) and Mn(II) salts has been investigated under hydrothermal reaction.This study demonstrated that the use of ligands bridged by acyclic polyether-bridged schiff-base ligands as precursors to bind transition metal metals, is in fact a new and efficient approach for synthesis of novel supramolecular systems with interesting chemical and physical properties.

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CLC: > Mathematical sciences and chemical > Chemistry > Organic Chemistry > Organic Chemistry general issues > Theory of organic chemistry,physical organic chemistry > Organic Chemistry Structure Theory
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