基于2-(3-吡啶基)-1H-吡唑-苯羧酸(Hppb)配体，成功合成3种溴离子参与配位的不同Cd(Ⅱ)配合物[Cd(Hppb)₂Br₂] (1)、[Cd₂(ppb)₂Br₂] (2)和[Cd(Hppb)Br₂]_n (3)，并确定了其结构特征。在3种配合物中，Cd(Ⅱ)离子、配体、溴离子的比例分别为1∶2∶2、1∶1∶1、1∶1∶2，最终得到单核(0D)、双核(0D)、一维骨架的不同结构。配合物1中的Cd(Ⅱ)配位环境为轻微扭曲的八面体几何结构，而配合物2和3的中心离子则显示出扭曲的四方锥几何结构。3个配合物的ppb^-或Hppb配体的连接模式存在明显差异。在配合物1中，2个Hppb配体为μ₁-κN，N′配位模式。而在配合物2中，2个ppb^-配体为μ₂-κN，N′∶κO配位模式，并且作为2个μ_{1, 1}桥连接2个Cd(Ⅱ)离子形成双核结构单元，2个Cd离子之间的距离为0.409 1(4) nm。在3中，中性Hppb配体为μ₂-κN，N′∶κO配位模式，并通过μ_{1, 6}桥连接Cd(Ⅱ)离子，沿b轴形成一维无限延长的链。利用Hirshfeld表面分析和二维指纹图对这3种配合物进行了研究。此外，配合物1~3的光致发光特性表明，配位阴离子Br^-对Cd(Ⅱ)配合物的荧光发射有很大影响。

Two coordination polymers were synthesized by hydrothermal reaction, namely, [Cd(H₃cpbda)(2, 2'-bipy) (H₂O)]_n (1) and[Mn(H₃cpbda)(phen)(H₂O)]_n (2), where H₅cpbda=5, 5'-[(5-carboxy-1, 3-phenyl)bis(oxy)]triisophthalic acid, 2, 2'-bipy=2, 2'-bipyridine, phen=1, 10-phenanthroline. The two complexes were characterized by single-crystal X-ray diffraction, powder diffraction, infrared spectroscopy, and thermogravimetric analysis. Complexes 1 and 2 are "V"-shaped 1D chains, and the molecules form 2D (1) and 3D framework (2) structures through weak π…π stacking. Furthermore, complex 1 was dispersed in an aqueous solution and its fluorescence intensity demonstrated excellent stability. Complex 1 can specifically detect ciprofloxacin in urine with a detection limit of 1.91×10^-8 mol·L^-1.

Two new complexes, [Zn₂(L1)(HL1)(NO₃)]·CH₃OH (1) and [Zn₃(L2)(L3)₃Cl]·CH₃OH (2), were successfully synthesized by'one-pot'method based on cinnoline-3-ylhydrazine ligand and zinc with 2-hydroxy-4-methoxybenz-aldehyde and 2-hydroxy-3-methoxybenzaldehyde ligands, respectively, where H₂L1=5-methoxy-2-(phthalazin-1-yl-hydrazonomethyl)-phenol, H₂L2=2-methoxy-6-(phthalazin-1-yl-hydrazonomethyl)-phenol, HL3=2-(1, 8-dihydro-[1,2,4]triazolo[3,4-α]phthalazin-3-yl)-6-methoxy-phenol. Complexes 1 and 2 were characterized by infrared spectroscopy, elemental analysis, single-crystal X-ray diffraction, powder X-ray diffraction, etc. It is worth noting that the cinnolin-3-yl-hydrazine ligand and 2-hydroxy-3-methoxybenzaldehyde form two types of Schiff bases (H₂L2 and HL3) when in situ reacting and coordinating with Zn(Ⅱ), and HL3 also has two coordination modes. In addition, the fluorescence performance showed that complex 1 can achieve selective and sensitive sensing of Al³⁺ in water with a detection limit of 6.37 μmol·L^-1.