Effect of microwave-assistant intercalation on photoluminescence emissionsand photo-stability

The layered double hydroxides (LDHs) have several advantages such as unique structure,large intercalated anions within interlayer spaces, and uniform distribution of metals in thelayered structure which make the LDHs significant layered materials[۱].Recently, intercalationusing microwave- assistant method has received more attention[۲]. The advantage of this processis decreasing the time of reaction [۳]. Intercalation using microwave- assistant method can beused as a method to control the dye molecules inside the LDH layers and improve thefluorescence properties of the nanohybrid but at the photoluminescence devices, photo-stabilityof prepared nanohybrids is as a key point for increased efficiency of the device [۴]. On the otherhands, the photo-stability of azoic dyes such as mordant orange ۱ is very poor under UV light.The purpose of this study was the preparation of layered double hydroxide (LDH) basednanohybrids with improved photoluminescence emission with high photo-stability. The anionexchange based microwave method was applied for the intercalation of mordant orange ۱ intoMgAl-LDH. In the MgAl-LDH interlayer space, a tilted orientation and bilayer arrangementwere predicted for the mordant orange ۱ anions. Compared with the pure mordant orange ۱, theMgAl–LDH/ mordant orange ۱-MA (prepared using the microwave-based anion exchangemethod) has improved photoluminescence emission with high photo-stability. These findingssupply a new approach for designing photoluminescence materials that potentially apply tooptical devices with high photo-stability

کلیدواژه ها:

MgAl–layered double hydroxide ، Mordant orange ۱ ، photoluminescence emission