摘要
以3-吡啶醛和(1R,2R)-环己二胺进行缩合得到Schiff碱配体L1,然后,用配体L1和AgNO3进行配位反应,得到配合物[Ag(L1)(NO3)]n(1),并用元素分析、FT-IR、X-射线单晶衍射、热重分析、粉末衍射对其进行了表征。晶体结构表明:配合物1属于单斜晶系,C2空间群,Ag(Ⅰ)的配位环境均为扭曲四面体,分别和硝酸根的氧原子,配体中的2个吡啶氮原子以及1个亚胺氮原子配位,配体L1有2种配位模式,其中,1个配体用两臂的2个吡啶氮原子分别和2个Ag(Ⅰ)离子配位,另外1个配体用两臂的2个吡啶氮原子分别和2个Ag(Ⅰ)离子配位,同时2个亚胺氮原子也分别和2个Ag(Ⅰ)离子配位,这样配合物形成3D孔状结构。同时研究了配合物的固体荧光性质。
The Schiff base ligand L1（N,N′-bis（3-pyridinecarboxaldehyde）-（1R,2R）-cyclohexanediimine） was synthesized from the condensation reaction of（1R,2R）-1,2-cyclohexanediamine with 3-pyridinecarboxaldehyde.AgNO3 reacted with L1 to give the complex [Ag（L1）（NO3）]n（1）, which was characterized by elemental analysis, FTIR, single crystal X-ray diffraction, thermogravimetric Analysis（TGA） and powder X-ray diffraction. In the complex, the coordination environment of Ag （Ⅰ） adopted a distorted tetrahedral geometry, being bound to one oxygen donor from a monodentate nitrate anion as well as to nitrogen atoms and imine nitrogen atoms from three adjacent molecules of L1. In compound 1, the L1 ligands coordinated to the Ag（Ⅰ） ions in two different ways. The first involved L1 bridging of Ag（Ⅰ） centers in a bidentate fashion via the two terminal pyridyl N-donors only. The other binding mode involved L1 coordination to Ag（Ⅰ） ions in a tetradentate mode through both terminal pyridyl N-donors and both amine nitrogen atoms. In this mode, the complex 3D porous structure of 1 was formed. At the same time, the fluorescent properties of ligand and complex 1 are investigated in the solid state at room temperature. CCDC： 969699, L1; 969700, 1.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2014年第10期2433-2439,共7页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金(No.21061003)
贵州省联合基金(黔科合LG字[2012]016)资助项目
