Synthesis And Structure Research Of1,2,4-Diazaphospholes Derivatives And Cu~Ⅱ、Fe~Ⅱ And Ru~Ⅱ Metal Complexes

Bistable system, as molecular-based device, is widely usedin the field of the temperature sensor, the light-heat switch, andthe information storage. Spin crossover complex is the most in-depth bistable system. In some external conditions （such as temperature, pressure, magnetic, optical radiation, and specific guest molecules or chemical environment）, which can lead to a stable state to another stable state transition that play a role in information storageor switch. Pyridine bridged pyrazol-heterocyclic metal complex of coordinations with Fe^Ⅱis a synthetic spin transition complexes what can occur spin transition phenomenon, because1,2,4-diazaphosphol having two hetero atoms of N and P, with thebetter cooperation capability and rich coordination modes, in this paper, we replaced pyrazole by1,2,4-diazaphosphol, synthesized the new tridentate ligand pyridine-bridged diazaphospholes-2,6-bis（1,2,4-diazaphospholes）pyridine and1,2,4-diazaphosphol react with benzoquinone produced phenol derivatives, and fuethersynthesis of aligand of coordination with Fe^Ⅱ、Ru^Ⅱand Cu^Ⅱmetalcomplexes, and investigated structures.The main contents of this paper involved:（1） Synthesis of a series of symmetrical1-H-1,2,4-diazaphospholes, and further optimize the reaction conditions, to improve the yield.（2） Design and synthesis of a series of planar unsymmetrialbridged double diazaphosphols.（3） Based on1,2,4-diazaphosphole, we also synthesized thenew tridentate ligand pyridine-bridged diazaphospholes-2,6-bis（3,5-dihydro-1,2,4-diazaphospholes）pyridine and2,6-bis（3,5-dimethyl-diazaphospholes）pyridine; resulting ligand further synthesis of coordination with Cu^Ⅱand Fe^Ⅱ, these two single-crystal structuresof2,6-bis（3,5-dimethyl-diazaphospholes）pyridine and2,6-bis（3,5-dihydro-1,2,4-diazaphospholes）pyridine with CuCl₂metal complexes were established by single-crystal X-ray diffraction.（4） Design and synthesis of1,4-dihydroxy-2,3-bis（diazaphosphol-l’-yl）benzen and1,4-dihydroxy-2-（diazaphosphol-l’-yl）benzene, thetwo single-crystal structures of1,4-dihydroxy-2,3-bis（diazaphosphol-l’-yl）benzen and1,4-dihydroxy-2-（diazaphosphol-l’-yl）benzene were established by single-crystal X-ray diffraction; and further synthesis of aligand of coordination with Ru^Ⅱ, Cu^Ⅱmetal complexes.