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Cyclohexylenedinitrilotetraacetic shrink o-vanillin single lanthanide complexes Synthesis, Structure and Properties

Author: ZhangZuo
Tutor: LiGuangMing
School: Heilongjiang University
Course: Organic Chemistry
Keywords: 6,6’-dimethoxy-2,2’-[(cyclohexane-1,2-diyl)bis(nitrilomethylidyne)] diphenol rare earth complexes synthesis structure property
CLC: O627.3
Type: Master's thesis
Year: 2011
Downloads: 62
Quote: 2
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Abstract


In this paper, reactions of Schiff base ligand 6,6′-dimethoxy-2,2′- [（cyclohexane-1,2-diyl）bis（nitrilomethylidyne）]diphenol （H2L） with rare-earth salts under diffusing conditions yielded sixteen new coordination complexes: [Nd（H2L）2MeOH]（PF6）3·H2O·2CH2Cl2 （1）, [Ce（H2L）2MeOH]（PF6）3·CH2Cl2 （2）, [Sm（H2L）2H2O]（PF6）3·MeOH·2CH2Cl2 （3）, [Yb（H2L）2MeOH]（PF6）3·H2O·2CH2Cl2 （4）, [Sm（H2L）2MeOH]（PF6）3·CH2Cl2 （5） and [Sm（H2L）2MeOH]（PF6）3·2CH2Cl2 （6）. The complexes [（CuClL）LaCl2（CH3OH）3]·H2O （7） [（CuClL）SmCl2（CH3OH）2] （8） [（CuClL）GdCl2（CH3OH）2] （9） and [（CuClL）DyCl2（CH3OH）2] （10）; four 3d–4f heterodinuclear Cu–Ln dinuclear single molecular structure complexes: [（CuClL）LaCl2（CH3OH）3]·H2O （7）, [（CuClL）SmCl2（CH3OH）2] （8）, [（CuClL）GdCl2（CH3OH）2] （9） and [（CuClL）DyCl2（CH3OH）2] （10）; two heterotrinuclear complexes: [（LCuCl）2GdCl] （11）,[Zn2（H2L）2SmCl2]·（PF6） （12） and one trinuclear complexe: [Yb3L3（OH）3Cl（H2O）4]2Cl·2H2O （13）; four tetranuclear complexes: {[Yb4L4（NO3）2（H2O）2]·[Yb（NO3）3（H2O）2（MeOH）]0.5·2CH2Cl2·H2O}（NO3）2 （14）, {[Sm4L4（OAc）2（H2O）2]·2H2O}（PF6）2 （15） and {[Yb4L4Cl2（H2O）2]·H2O}（PF6）2 （16）. Single crystal X-ray crysrallographic analysis are carried out for these complexes and IR, UV, TG-DSC measurements were employed as well to confirm their strutures. Complexes 3, 5, 6 and 12 had fluorescence property, Complexes 1, 4, 14 and 16 showed typical NIR emissions at room temperature. The fluorescence and NIR properties of the complexes were investigated in various solvents. Magnetic property of 9 has been studied and it revealed a ferromagnetic behavior depending on Cu···Gd.

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CLC: > Mathematical sciences and chemical > Chemistry > Organic Chemistry > Elements in organic compounds > The first III group elements, organic compounds
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