A One‐Dimensional Cadmium Coordination Polymer: Synthesis, Structure, and Application as Luminescent Sensor for Cu²⁺ and CrO₄²⁻/Cr₂O₇²⁻ Ions

Abstract

A novel coordination polymer {[Cd 4 (CPIP) 3 Cl 8 ]} n (CP1) was constructed from the reaction of CPIP (CPIP = 1-chloro-3-(pyridine-2-yl)imidazo[1,5-a]pyridine) and CdCl 2 •2.5H 2 O under solvothermal conditions. The employment of CPIP as the ligand was based on the consideration that two types of Lewis basic sites (the fused nitrogen atom and the chlorine substituent) are present on the backbone of the ligand. These sites can be utilized for interacting with cations and anions, thus for the sensing functionality. Single-crystal X-ray diffraction studies revealed that CP1 exhibits interesting one-dimensional (1D) polymeric chain structure. The adjacent four Cd II ions are connected by one μ 3 -Cl and five μ 2 -Cl atoms to form a Chineselantern-like topology. CP1 is an excellent luminescent sensor for detecting Cu 2 + , CrO 4 2À and Cr 2 O 7 2À ions with high selectivity, sensitivity, and recyclability. Moreover, CP1 is the first reported chloride-bridged coordination polymer that is capable of sensing Cu 2 + ion. The mechanisms for sensing Cu 2 + , CrO 4 2À and Cr 2 O 7 2À ions were investigated and discussed.

FeII, CoII and NiII complexes based on 1-chloro-3-(pyridin-2-yl)imidazo[1,5-a]pyridine: synthesis, structures, single-molecule magnetic and electrocatalytic properties

“…22) compounds with the derivatives of 3-(pyridin-2-yl)imidazo[1,5- a ]pyridine as ligands. Only one Cd II coordination polymer based on 1-chloro-3-(pyridin-2-yl)imidazo[1,5- a ]pyridine ( L ) has been reported, 23 revealing the potential applications of the L ligand in the synthesis of a variety of complexes in the future.…”

“…While a handful of transition metal compounds with the derivatives of 3-(pyridin-2-yl)imidazo[1,5- a ]pyridine as ligands have been prepared, 18–23 the reports about the magnetic properties of these compounds are very rare. The magnetic properties of four Co II complexes [Co(bcpp)Cl 2 ], 27 [Co(bcpp)Br 2 ], 27 [Co(bpip)(NCS) 2 ], 28 and [Co(bpip)Br 2 ] 28 (bcpp = bis(1-chloroimidazo[1,5- a ]pyridin-3-yl)pyridine; bpip = 2,6-bis(imidazo[1,5- a ]pyridin-3-yl)pyridine) were reported.…”

Imidazopyridine Family: Versatile and Promising Heterocyclic Skeletons for Different Applications

“…Moreover, many studies have been conducted regarding the application of chemosensors based on imidazo[1,5- a ]pyridines for the quantification of hydrogen sulfide [ 62 ] and hydrogen polysulfides [ 175 ], sulfur dioxide [ 177 , 180 ], hypochlorous acid [ 181 , 182 , 183 ], and metal ions such as Cd 2+ and Zn 2+ [ 184 ], Hg 2+ [ 47 , 185 ], and Cu 2+ [ 170 , 186 ].…”

Long-Alkyl Chain Functionalized Imidazo[1,5-a]pyridine Derivatives as Blue Emissive Dyes

“…These compounds are also well known for their luminescence properties; in fact, they have been used as probes even in living cells, towards several analytes, such as Hg 2+ [8], H 2 S [9] and sulfites [10]. Moreover, it has been recently reported by Zhang that a coordination polymer derived from imidazo [1,5-a]pyridine is capable of detecting Cu 2+ , CrO 4 2− and Cr 2 O 7 2− ions in water solution [11]. Even more studied is the ability of imidazo [1,5-a]pyridines to act as ligands with a large variety of metal centers.…”