Tcnq Radicals Structure Of Rare Earth Complexes And Magnetism Performance Research

Two series of TCNQ lanthanide complexes,[Ln（TCNQ）₂（H₂O）7]（TCNQ）·5H₂O·EtOH （Ln=Nd （1）, Sm （2）, Eu （3）, Gd （4）, Dy （5））,[Ln₂（TCNQ）₂（H₂O）15]₂[（TCNQ）₈]·x（p-dioxane）·14H₂O （Ln=Ce （6, x=5）, Pr （7, x=5）,Nd （8, x=4））, and two TCNQ transition metal complexes,Li[Zn₂（TCNQ）₅（H₂O）₆][Zn（TCNQ）₂（H₂O）₄]·6H₂O （9）, Co（TCNQ）₂（H₂O）₂（DMF）₂（10）,have been isolated by reactions of Ln（NO₃）₃nH₂O、LnCl₃nH₂O、MCl₂with LiTCNQ（TCNQ=7,7,8,8-tetracyano-p-quinodimethane） in this dissertation.The molecule structures of1–10were determinated by X-ray single crystaldiffraction analysis.1–9are discrete ion complexes, and complex10is formed by singlemolecule. Two TCNQ–are coordinated to one cation in1–5and10. In6–8, twoTCNQ–are coordinated to two lanthanide ions. And there are five TCNQ–coordinatingto two cations in9.Both2and4exhibit temperature independent paramagnetism （TIP） with large χTIPvalues of9.9×10^–3emu mol^–1for2and3.01×10^–2emu mol–1for4, respectively.The electrochemical properties of complexes1–9show reversible one-electronoxidation and reversible one-electron reduction within the electrochemical window ofCH3CN. The lanthanide ions have a slight influence on the electrochemicalHOMO–LUMO gap of TCNQ–.