Syntheses, Structures And Properties Of Aromatic Dicarboxylic Crystalline Materials

Embarking from the applications and functionalities of materials, eighteen novelmetal-organic crystalline materials were rationally designed based on aromaticdicarboxylic acid in combination with auxiliary N-Donor ligands. Their synthesisconditions, influencing factors, topology structure and optical and magnetic propertieswere discussed in this paper.Main content can be divided into three parts sorted by different ligands used. The firstpart is the influence of ligand conformation on crystal structures. Complex1~6weresynthetized based on3,3’-biphenyldicarboxylic acid, of which1~3present1D chains ofdifferent type prepared in combination with chelate N-Donor ligands and4~6exhibit3Dstructure prepared in combination with bridging N-Donor ligands. The second part is theinfluence of ligand length on crystal structures. By tuning the length of N-Donor ligands，two series of MOFs（7~9and10~14）based on2,4’-biphenyl dicarboxylic acid wereobtained and the structural dimensions of those MOFs grow with the increasing length ofN-Donor ligands. The third part is the influence of steric hindrance on crystal structures.Complex15~18were prepared with mixed use of9-fluorenone-2,7-dicarboxylic acid andN-Donor ligands, where chelate N-Donor ligands for15~17and bridge N-Donor ligandsfor18. The dispersion of their SBUs in15~17get increased with varied steric hindrance ofchelate N-Donor ligands and comparing to15~17, the introduction of bridge N-Donorligand lead a3D network of18.The syntheses, structures and properties of those MOFs mentioned above have beencharacterized and analyzed in detail and how the crystal structure, and properties wereinfluenced by the introduction of N-donors were emphatically explored in this paper.