Synthesis And Properties Of Aniline And Halogenated Aniline Crown Ether Inclusion Complexs

In recent years,the research of phase transition materials is very popular,which is inseparable from its excellent properties in optics,electricity,magnetism and other fields.Ferroelectric materials are a kind of special phase change materials.They are not only piezoelectric materials but also pyroelectric materials.They have very rich properties and play an important role in sensors,capacitors,information storage,inductive switches and so on.Most of the mechanisms of phase change materials are ordered disordered,and crown ether is a unique cyclic compound which is easy to produce ordered disordered phase transition.Therefore,it is often chosen as a ligand to construct molecular motor phase transition materials.Inspired by the prototype phase[han-18-crown-6]⁺[ClO₄]^-(Han=protonated aniline)^[55],we combined several molecular phase transition materials to synthesize crown ether.Several new types of crown ether inclusion complexes have been synthesized,and their properties have been tested and characterized.This paper is divided into six parts:the first part introduces the related knowledge of crystal and phase transition materials;the second part lists the related experimental instruments and drugs;the third part improves the rotor stator crown ether inclusion complex[C₁₈H₃₂NO₆(TFSA)](1)(TFSA:Trifluoromethanesulfonimide)of aniline type according to the momentum matching principle;compound 1 has two phase transitions,the phase transition temperature of which is 4K,60K higher than that of the original phase.In the fourth part,a novel crown ether inclusion complex was constructed by using fluorination effect,expecting to obtain phase transition materials with better properties,and[o-FC₁₈H₃₁NO₆(TFSA)](2),[m-FC₁₈H₃₁NO₆(TFSA)](3),[p-FC₁₈H₃₁NO₆(TFSA)](4),were synthesized;There is no phase transition in compound2,but there is phase transition in compounds 3 and 4.Speculation may be due to the effects of different positions on the aniline group F substitution;In the fifth part,crown ether inclusion compounds[o-ClC₁₈H₃₁NO₆(TFSA)](5),[m-ClC₁₈H₃₁NO₆(TFSA)](6),[p-ClC₁₈H₃₁NO₆(TFSA)](7)were synthesized by using quasi spherical theory.Unfortunately,they have no significant effect.Their crystal structure,DSC,IR and powder diffraction were studied characterization.The reversible phase transition of compounds 1,3,4 and 7 was confirmed by dielectric,DSC and powder diffraction tests,and the phase transition was caused by the order disorder transition of organic amine cations and organic acid anions.Compounds 2,5 and 6 have no reversible phase transition.The sixth part summarizes and prospects the related properties of these seven compounds.