Two new complexes, [M(4-CNB)₂(DENA)₂(H₂O)₂] (where M: Co and Mn, 4-CNB = 4-cyanobenzoate and DENA = N,N’-diethylnicotinamide), were synthesized and characterized using different techniques (elemental analysis, FT-IR Spectroscopy, single-crystal X-ray diffraction, and TGA/DTA analysis). Looking at the crystal structure of the complexes, the metal atoms are coordinated by two nitrogen atoms from two DENA ligands, two carboxyl oxygen atoms from two 4-cyanobenzoate anions, and two oxygen atoms from two water molecules, and the complexes have distorted octahedral geometry around the metal atom center. Both complexes were crystallized with the P-1 space group in the triclinic system. The linear absorption and emission features of the complexes were recorded by UV–Vis and fluorescence spectrophotometers, respectively. Linear absorption and emission results of the complexes showed that [Mn(4-CNB)₂(DENA)₂(H₂O)₂] complex can be used as optical filter below 400 nm wavelength when [Co(4-CNB)₂(DENA)₂(H₂O)₂] complex has a good application potential among the fluorescent materials, because of its high emission intensity. In addition, the Hirshfeld surfaces analyses of complexes have been investigated in detail.

中文翻译：

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Mn（II）和Co（II）4-氰基苯甲酸酯的N，N'-二乙基烟酰胺络合物的合成，光谱，热，结构，光学表征和Hirshfield表面分析

两个新的配合物[M（4-CNB）₂（DENA）₂（H ₂ O）₂ ]（其中M：Co和Mn，4-CNB = 4-氰基苯甲酸酯，DENA =  N，N使用不同的技术（元素分析，FT-IR光谱，单晶X射线衍射和TGA / DTA分析）合成并表征了'--diethyl烟碱酰胺）。观察配合物的晶体结构，金属原子由来自两个DENA配体的两个氮原子，来自两个4-氰基苯甲酸根阴离子的两个羧基氧原子和来自两个水分子的两个氧原子配位，并且该配合物的八面体几何结构发生了畸变。围绕金属原子中心。两种配合物均在三斜晶系中与P-1空间基团结晶。配合物的线性吸收和发射特征分别通过紫外可见光谱仪和荧光分光光度计记录。配合物的线性吸收和发射结果表明，[Mn（4-CNB）₂（DENA）₂当[Co（4-CNB）₂（DENA）₂（H ₂ O）₂ ]配合物在荧光材料中具有良好的应用潜力时，（H ₂ O）₂ ]配合物可用作波长低于400 nm的滤光片。高发射强度。此外，还对复合物的Hirshfeld表面分析进行了详细研究。