Two Cadmium(II) Coordination Polymers based on Pamoic Acid and Different Polydentate N‐donor Ligands: Syntheses, Crystal Structures, and Fluorescence Properties

Abstract

Two new fluorescent coordination polymers based on pamoic acid and different polydentate N‐donor ligands, namely {[Cd(PA)(TPTZ)(H2O)](DMF)2}n (1) and [Cd(PA)(BIB)]n (2) [H2PA = pamoic acid, TPTZ = 2,4,6‐tri(2‐pyridyl)‐1,3,5‐triazine, BIB = 1,4‐bis(1‐imidazolyl)benzene], were synthesized and characterized. Complex 1 showed a 1D zigzag chain structure with intramolecular hydrogen bonds. The 2D supramolecular structure in 1 was formed through π–π stacking interactions and intermolecular hydrogen bonds. Complex 2 displayed a 2D network structure. Intramolecular hydrogen bonds and π–π stacking interactions were observed in 2. By studying the fluorescence sensing performance of two coordination polymers, complex 1 exhibited high selectivity for tracking Al3+ ion and complex 2 could discriminately detect inorganic or aliphatic amines with high selectivity.

Two‐dimensional MOFs: Design & Synthesis and Applications

“…It can enter the human body through a variety of ways. After human ingesting a large amount of Al 3+ , it will cause harm to human health [101] . Alzheimer's disease, Parkinson's disease, osteoporosis and rickets are all related to excessive intake of Al 3+ , so we must find a method to detect the presence of Al 3+ .At present, people can use some MOFs with strong stability and large specific surface area to realize the photoluminescence sensing of Al 3+ with high sensitivity and selectivity.…”

Synthesis, Crystal Structure and Characterization of Two Cobalt (II) Complexes Based on Pyridine Carboxylic Acid Ligands

“…They have a variety of coordination methods, which have a certain possible design. [10][11][12] In order to change the structure of the complex, when selecting organic ligands, some rigid elements are often added, so that the two carboxyl groups coordinate with different metals to build a variety of structures. [13][14][15] Pyridine carboxylic acid ligands combine the functions of Ncontaining heterocyclic ligands and O-containing carboxylic acid ligands, on the one hand, nitrogen atoms and carboxyl oxygen atoms easily coordinate with transition metal ions to form stable coordination bonds, which increases the structural diversity and stability; on the other hand, partially or completely deprotonated carboxylic acids act as both proton donors and acceptors in hydrogen bonds, structures made with different dimensions are easy to implement.…”

“…Through different metal ions and organic ligands, they can flexibly and conveniently adjust their connection and surface functional groups. They have a variety of coordination methods, which have a certain possible design [10–12] . In order to change the structure of the complex, when selecting organic ligands, some rigid elements are often added, so that the two carboxyl groups coordinate with different metals to build a variety of structures [13–15] .…”