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Syntheses, Crystal Structures and Magnetic Properties of Two New low-dimensional Manganese (Ⅱ) coordination compounds

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Chinese Journal of Structural Chemistry 2020年第6期39卷 1077-1086页

作者： LI Jian-Hua WANG Xiao-Zhong WEI Hai-Wen HOU Qin LAI Xiao-Yong LIU Xiang-Yu YANG Qing-Feng State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering National Demonstration Center for Experimental Chemistry EducationCollege of Chemistry and Chemical Engineering Ningxia University Yinchuan 750021China College of Chemistry and Materials Science Shandong Agricultural UniversityTaian 271018China

Two new low-dimensional Mn(Ⅱ)coordination compounds of Mn(H2pimdc)2(phen)(compound 1)and[Mn(Hpimdc)(phen)]n·nH2O(compound 2)were synthesized,where H3pimdc is a 2-propyl-imidazole-4,5-dicarboxylic acid and phen is 1,*** compounds were thoroughly analyzed by X-ray single-crystal diffraction,element analysis,IR spectra,PXRD and thermal analysis.X-ray single-crystal diffraction analyses indicate that the phen ligands terminate metal ions on two sides to prevent the linkage between the neighboring metal ions into a higher dimensional structure in compounds 1 and *** 1 is constructed from mononuclear molecules which form the 1D helical supramolecular chain by N-H···O hydrogen *** compound 2,Hpimdc is a tetradentate bridging ligand,which binds Mn(Ⅱ)ions to generate a single-stranded right helical chain parallel to the b *** 1D chains are additionally coupled by H-bonds as well asπ···πstacking interactions,which formed a 3D supramolecular ***,compound 2 demonstrated temperature-dependent magnetic susceptibility and negative value ofθ(equal to-9.09 K),which is indicative of weak antiferromagnetic interactions between Mn(Ⅱ)ions.

关键词： low-dimensional coordination compounds helical structure magnetic properties

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Structural and Magnetic Characterization of Two New coordination compounds Based on a Fluorene Derivative Ligand

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Chinese Journal of Structural Chemistry 2022年第2期41卷 64-72,I0009页

作者： YANG Qing-Feng YUE Kai WANG Zhi-Hui LAI Xiao-Yong WANG Xiao-Zhong QIN Ling State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering National Demonstration Center for Experimental Chemistry EducationCollege of Chemistry and Chemical EngineeringNingxia UniversityYinchuan 750021China Chongqing Changfeng Chemical Industrial Co. Ltd.Chongqing 401220China

Two new coordination compounds[Co(FDC)_(2)(H_(2)O)_(2)]_(n)(1)and[Cu(FDC)_(2)(2,2?-bpy)]·DMF·H_(2)O(2)(HFDC=9-fluorenone-4-carboxylic acid,bpy=2,2?-bipyridine,DMF=N,N-dimethylformamide)were prepared by the reactions of corresponding metal salts with a fluorene derivative ligand of *** compounds were thoroughly analyzed by X-ray single-crystal diffraction,elemental analysis,IR spectra,PXRDand thermal *** 1 features a 1D *** two kinds of O?H···O hydrogen bonds,such 1Dchains self-assemble into a 3D supramolecular structure stabilized by the offset face-to-faceπ···π*** 2 features a dinuclear structure which,via O?H···O and C?H···O hydrogen bonds,self-assembles into a 2D supramolecular layer strengthened by strong face-to-faceπ···π*** variable-temperature magnetic susceptibilities of 1 and 2 indicate weak antiferromagnetic interactions between the Co(II)and Cu(II)metal ions.

关键词： low-dimensional coordination compounds fluorene derivative magnetic properties

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