Construction of four new d10 metal ion coordination polymers: Synthesis, characterization and structural diversity

• Published in: Polyhedron 2022-11, Vol.227, p.116144, Article 116144
• Main Authors: Maiti, Anupam, Halder, Arijit, Dinda, Susanta, Pahari, Goutam, Ghoshal, Debajyoti
• Format: Article
• Language: English
• Subjects: Coordination polymer; Interpenetration; Ligand length; Ligand rigidity; Single crystal X-ray analysis
• ISSN: 0277-5387
• DOI: 10.1016/j.poly.2022.116144

Four CPs have been synthesized varying the dicarboxylate in corresponding complexes. Two of them have 2D structure whereas the rest two have 3D structure and one of the 3D structure shows 5-fold interpenetration. Gas sorption studies are performed with the synthesized CPs and correlates with their framework. [Display omitted] In this study, a N,N′ donor ligand, ((pyridin-4-yl)methylene)isonicotinohydrazide (4-pmi) has been utilized with two different d10 metal ion, Zn(II) and Cd(II), and four different dicarboxylate to synthesis four different coordination polymers, namely {[Zn(4-pmi)(fum)]·(solvent)}n (1), {[Cd(4-pmi)(suc)]·(H2O)}n (2), {[Zn(4-pmi)(2,2dmglut)]· (solvent)}n (3) and {[Zn(4-pmi)(adp)]·(H2O)0.5}n (4) [fum = fumarate, suc = succinate, 2,2dmglut = 2,2′-dimethyl glutarate and adp = adipate]. Full structure elucidations are done by single crystal X-ray diffraction (SXRD) which reveals that 1 is three dimensional fivefold interpenetrated structure with uni-directional pore filled with lattice solvent molecules. On moving from flexible succinate to rigid fumarate with same carbon chain length, resultant structure is a non-interpenetrated 3D structure in 2. Whereas, on moving to higher chain length dicarboxylate, resultant structures are two dimensional for 3 and 4. All of these CPs are fully characterized by powder X-ray diffraction (PXRD), thermo gravimetric analysis (TGA), UV–vis spectroscopy, Fourier transform infrared spectroscopy (FTIR) etc. Apart from this different gas sorption studies are also performed with all of them.