(509bx) Magnesium- PAP Metal Organic Framework Based Photoswitcher for the Degradation of Chlorpyrifos

Mesoporous magnesium-based metal-organic framework (Mg-MOF) with photoswitchable azobenzene group represents a unique family of materials that are known for their applications in adsorption and degradation of harmful chemicals. Here, we report the study and formation of photochromic azobenzene based Mg-MOF from logical design to application opportunities. The Mg-MOF is synthesized by microemulsion technique using AOT/n-Butanol/water system. The resulting MOF proved to be an excellent catalyst for the degradation of Cpy as well as a “commendable photoswitcher,” which shows trans to cis photoisomerization upon exposure to UV light and vice-versa when irradiated with visible light within 30 minutes. The switching effect enhances the rate of degradation of Cpy around 3 times higher in Cis form (with rate constant 0.00383 min^-1) than that of trans (with rate constant 0.0014 min^-1) one. It is also found that the MOF do not offer steric hindrance and hence allows azobenzene to switch at a favorable rate. A detailed perceptive mechanism of interaction of Mg-MOF and Cpy is also reported at room temperature under UV and visible light irradiation. The findings highlight the reusability and application of Mg-MOF for the purification of pesticide-contaminated drinking water.