Two new Hg(II), {[Hg(phend)₂Cl₂].(0.5 phend) (1) and [Hg(phend)₂Br₂].(0.5 phend) (2)} and a new Cd(II) {[CdI₂(phend)₂] (3)} complexes, containing phenanthridine (phend) ligand, have been synthesized from the reaction of HgCl₂ (1), HgBr₂(2), and CdI₂ (3) with phend, respectively. The complexes were thoroughly characterized by elemental analysis, FT-IR, UV, NMR, and emission spectroscopies. Moreover, single-crystal X-ray diffraction studies were undertaken to examine the coordination geometry of complexes 1-3 in the solid-state. According to X-ray analysis, the complexes 1 (τ₄ = 0.77) and 2 (τ₄ = 0.74) exhibit distorted tetrahedral geometries and 3 (τ₄ = 0.90) shows slightly distorted tetrahedral geometry. So, complexes 1 and 2 have similar structures. However, the emission maximum of complex 1 is stronger than 2, which indicates that the different coordinated counter anions play a significant role in determining the photoluminescence properties of the complexes. Meanwhile, all complexes 1-3 have stronger emissions than free phend ligand in the DMSO solution.

两个新的Hg（II），{[Hg（phend）₂ Cl ₂ ]。（0.5 phend）（1）和[Hg（phend）₂ Br ₂ ]。（0.5 phend）（2）}和一个新的Cd（II ）由HgCl ₂（1），HgBr ₂（2）和CdI ₂（3）的反应合成了含有菲啶（phend）配体的{[CdI ₂（phend）₂ ]（3）}络合物）和phend。通过元素分析，FT-IR，UV，NMR和发射光谱对配合物进行了全面表征。此外，单晶X射线衍射研究开展了研究复合物的配位几何形状1 - 3中的固态。根据X-射线分析，复合物1（τ ₄  = 0.77）和2（τ ₄  = 0.74）表现出扭曲四面体几何形状和3（τ ₄  = 0.90）显示轻微失真四面体几何形状。因此，复合物1和2具有相似的结构。但是，配合物1的最大发射强度强于2，这表明不同的配位抗衡阴离子在确定配合物的光致发光特性中起着重要作用。同时，所有的复合物1 - 3具有比在DMSO溶液中的游离配位体phend强排放。