Abstract
The reaction of semi flexible ligand, 9,10-bis((4-carboxylatopyridinium-1-methylene)anthracene dihyrdrobromide ([H2cpma]Br2) with transition metal ions [Cu(II), Zn(II) and Cd(II)] in solvothermal condition resulted in the formation of three new coordination polymers i.e., Cu3(cpma)7/2(O)2(H2O)3Cl](NO3)2(H2O)2(S)} (Cu-cpma), {[Zn(cpma)Cl2] (S)} (Zn-cpma) and {[Cd(cpma)(Br)(NO3)]2(S)} (Cd-cpma) where cpma denotes 9,10-bis((4-carboxylatopyridinium-1-methylene)anthracene and S denotes the squeezed solvent molecules. These coordination polymers have been characterized by single crystal X-ray, powder XRD, TGA, IR, elemental analysis and fluorescence emission spectroscopy techniques. Single crystal X-ray studies revealed that both Cu-cpma and Zn-cpma are one dimensional chain whereas Cd-cpma has zero dimensional structure. The appropriate particle size of all CPs was calculated by the PXRD pattern using Debye-Scherrer equation and found that all the CPs is of nano range. These nano coordination polymers (NCPs) were evaluated in live-cell imaging assays using HCT-15 as a model cell-line. The results showed that Zn-cpma has highest fluorescence value.
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