Efficient capture and stabilization of iodine via gas-solid reaction using cyclodextrin metal-organic frameworks

For treatment of wound infection with stabilized iodine, potassium iodide cyclodextrin metal-organic frameworks (KI-CD-MOF) was prepared to carry iodine via gas-solid reaction. Apart from highly ordered porous frameworks, KI-CD-MOF contains uniformly distributed iodide ions which stabilize iodine (I2). X-ray photoelectron spectroscopy and potentiometric titration were utilized to confirm the formation of I3- in the highly porous KI-CD-MOF as I2@KI-CD-MOF. Molecular simulation and characterizations of the synchrotron radiation Fourier transform infrared spectroscopy, differential scanning calorimeter, powder X-ray diffraction and N2 adsorption were conducted to illustrate the inclusion mechanism of iodine in I2@KI-CD-MOF. The apparent solubility of iodine in water was 3.86 times enhanced. The stability and antibacterial activity tests demonstrated that the highly-dispersed iodide ions in KI-CD-MOF are crucial in improvement to the solubility, stability, and bacteriostatic effects of active iodide. Therefore, KI-CD-MOF has broad application prospects and advantages in efficiently capturing and stabilizing iodine.