Novel Porous Polycatenated Iodo-Cadmium Coordination Polymer for Iodine Sorption and Electrical Conductivity Measurement

The porous materials are efficient storage and exchange system of small molecules and ions. Some of the porous materials may be used as efficient storage system of iodine. Herein, a honeycomb (hcb) type 2D+2D, parallel polycatenated Porous Polycatenated Coordination Polymer (PPCP) {[Cd2I2(BDC)2(INH)2].(2DMF)(H2O)}n, 1 (INH, Isoniazid; H2BDC, terephthalic acid) is characterized which reversibly uptakes I2 from organic medium (more than 98%). The single crystal X-ray structure determination reveals the CdIN2O3 distorted octahedral geometry and the micro-porous channel (~ 1.7 nm) is generated by polycatenation along with the supramolecular interaction. On thermal treatment at 120 C the polymer, 1, loses solvents while the crystalinity is reserved. The solvent-free activated state of the coordination polymer, [Cd2I2(BDC)2(INH)2]n, 1′, adsorbs N2 and the adsorption-desorption analysis has displayed the increase in porosity to mesoporous range (~ 14.7 nm) with very high specific BET surface area which may be d...