Polymorphism in [Ag(bpetan)]_n Coordination Polymers with Nitrate and Isophthalate Anions: Photocatalytic and Antibacterial Activity, Hemolysis Assay and Study of Cytotoxicity

Abstract

Two Ag(I) coordination polymers (CPs), namely [Ag(bpetan)(NO3)]n (CP1) and {[Ag(bpetan)]2(iph).8H2O}n (CP2) [where bpetan=1,2‐bis(4‐pyridyl)ethane, H2iph= isophthalic acid] were synthesized and characterized using elemental analysis, IR, UV‐Vis, fluorescence spectroscopy, and single crystal X‐ray diffraction. Both the CPs crystallize in triclinic system and the crystal structures comprise [Ag(bpetan)]nn+ polymers that are linked by nitrate ions to give rise to a corrugated 2D infinite rectangular net in CP1. On the other hand, isophthalate ions in 2 do not participate in coordination and together with lattice water molecules are encapsulated between the [Ag(bpetan)]nn+ chains. A structural comparison of CP1 and CP2 was done with compounds of same stoichiometry but crystallizing in different space groups. The band gap energies of CP1 and CP2 were calculated to assess their photocatalytic activity, and the latter was found to act as a more efficient photocatalyst to degrade the methylene blue dye. In addition CP2 offers a better anti‐bacterial, cytotoxicity and hemolytic activity than CP1.

Conjugation of a Silver-Based Coordination Polymer with Curcumin: A New Case of an Inorganic Polymeric Co-crystal

“…Considering the coordination versatility of the N^N ligand bpy with respect to the Ag­(I) ion in the presence of trifluoromethanesulfonate (OTf) as a counterion, the synthesis of Ag­(I) CPs is a delicate procedure since, as already demonstrated by Klausmeyer et al, a modification of the stoichiometric ratio between the N^N ligand and the silver precursor could lead to the formation of a discrete compound rather than a polymer . Moreover, polymorphism is frequently encountered in Ag­(I) coordination polymers − as a result of the structural flexibility of the polymeric chains. It is known that, in a given reaction, the addition sequence of the reagents can influence the formation of different polymorphs − probably as a consequence of different solubilization rates of the reagents.…”

Polytorsional-amide/carboxylates-directed Cd(ii) coordination polymers exhibiting multi-functional sensing behaviors

“…29,30 Among many uorescent sensing materials, coordination polymers (CPs) selfassembled by d 10 metal centers and organic ligands are considered as a kind of excellent sensor used for qualitative and quantitative detection of heavy metal ions, organic pesticides, antibiotic. [31][32][33][34][35][36][37] However, some of these sensors have relatively single detection objects. [38][39][40] Thus, it is of great signicance to develop complex-based sensing materials with multifunctional detection response, which is also a challenge facing this eld at present.…”

Two 1D Silver(I) Coordination Polymers with 1,3‐Bis(4‐pyridyl) propane and Aromatic Carboxylate Anions: Synthesis, Structure and Photocatalytic Behavior

“…In CP 1 and 2, the photocatalytic activity gets influenced by aromatic moieties in these species. [39][40][41][42] Photocatalytic activity: The calculated optical band gap for the photocatalytic action of complexes 1 and 2 was 4.08 and 4 eV, respectively. So, the transfer of electrons from the valence band to the conduction band can occur upon irradiation with photon energy higher or equal than its band gap energy.…”

“…It was earlier established that the efficiency of a photocatalyst is favoured by the presence of high amount of π electrons in the aromatic moieties. [39][40][41][42] The stability of photocatalysts, which is one of the major prerequisites of these materials, has been confirmed by performing the X-ray powder diffraction before and after the catalytic cycle (figure 7S, 8S).…”