Ni（II）-Ln（III）系统中的缺失环节：席夫碱配体的双核[Ni2]和三种五核[Ni3Ln2]（Ln = La，Ce，Eu）配合物的设计与合成,ChemistrySelect

当前位置： X-MOL 学术 › ChemistrySelect › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Ni（II）-Ln（III）系统中的缺失环节：席夫碱配体的双核[Ni2]和三种五核[Ni3Ln2]（Ln = La，Ce，Eu）配合物的设计与合成
ChemistrySelect ( IF 1.9 ) Pub Date : 2017-09-12 , DOI: 10.1002/slct.201701146
Sudeshna Saha ₁ , Arijit Sarkar ₁ , Suman Das ₂ , Tarun K. Panda ₂ , Klaus Harms ₃ , Hari Pada Nayek ₁

Affiliation

通过邻香兰素与2-氨基-4-硝基苯酚的反应合成了一种新的席夫碱配体N-（2-羟基苯基-3-3-甲氧基-水杨亚胺）-5-硝基苯酚（H ₂ L）。配体H ₂ L已用于制备同核和异核金属配合物。例如，双核的Ni（II）络合物，[镍₂（L）₂（H ₂ O）₃ ]⋅2DMF⋅3H ₂ O（1）和一个新的三异金属pentanuclear的家庭[倪₃ LN ₂大号₆（ H ₂ O）₄（DMF）₂]⋅4DMF（Ln = La（2），Ce（3）和Eu（4）通过将其与六水合硝酸镍和水合硝酸镧系元素反应制得，其配体（H ₂ L）和配合物1的固态结构–4通过单晶X射线衍射分析确定，单晶X射线衍射和NMR数据表明，配体H ₂ L以酮-烯胺形式固态存在，配合物1的结构表明形成了双核Ni（II）配合物配合物2-4是同构的，并呈现出蝴蝶状的结构，其中包含两个Ln（III）离子和三个Ni（II）离子。Ni（II）和Ln（III）被苯氧和水配体桥连，形成具有交替的Ni（II）和Ln（III）离子的五核链。已经探索了配体（H ₂ L）的不同配位方式。据我们所知，迄今还不知道这种含Ni-Ln和席夫碱配体的五核配合物。还研究了所有配合物的热稳定性和光学性质。

"点击查看英文标题和摘要"

The Missing Link in Ni(II)‐Ln(III) System: Design and Synthesis of a Dinuclear [Ni2] and Three Pentanuclear [Ni3Ln2] (Ln=La, Ce, Eu) Complexes of a Schiff Base Ligand

A new Schiff base ligand N‐(2‐hydroxyphenyl‐3‐methoxy‐salicylideneamine)‐5‐nitrophenol (H₂L) has been synthesized by the reaction of o‐vanillin with 2‐amino‐4‐nitrophenol. The ligand H₂L has been employed to prepare homo‐ and heteronuclear metal complexes. For example, a dinuclear Ni(II) complex, [Ni₂(L)₂(H₂O)₃]⋅2DMF⋅3H₂O (1) and a new family of three pentanuclear heterometallic [Ni₃Ln₂L₆(H₂O)₄(DMF)₂]⋅4DMF (Ln=La (2), Ce (3) and Eu (4) were prepared by the reaction of it with nickel nitrate hexahydrate and hydrated lanthanide nitrates. The solid state structures of ligand (H₂L) and complexes 1–4 were determined by single crystal X‐ray diffraction analyses. Single crystal X‐ray diffraction and NMR data reveal that the ligand H₂L exist as a keto‐enamine form in the solid state. Structure of complex 1 indicates formation of a dinuclear Ni(II) complex. Complexes 2–4 are isostructural and exhibits a butterfly‐like structure containing two Ln(III) ions and three Ni(II) ions. The Ni(II) and Ln(III) are bridged by phenoxo and aqua ligands resulting a pentanuclear chain with alternating Ni(II) and Ln(III) ions. Different coordination modes of ligand (H₂L) have been explored. To the best of our knowledge, such pentanuclear complexes containing Ni−Ln and Schiff base ligand are hitherto unknown. The thermal stability and optical properties of all complexes are also investigated.

更新日期：2017-09-12

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南