• 文献标题:   Fluorescence Sensor for Water in Organic Solvent Using Graphene Oxide- Rhodamine B and Cucurbit[7]uril
  • 文献类型:   Article
  • 作  者:   RAJENDRAN P, SATHISHKANNAN R, KARPAGALAKSHMI K, PIRAMUTHU L, NAGARAJAN ER, SUBBIAH S, YANG C, SELVAPALAM N
  • 作者关键词:   graphene oxide, fluorescence sensor, water sensing, fluorometric sensor, naked eye detection
  • 出版物名称:   JOURNAL OF FLUORESCENCE
  • ISSN:   1053-0509 EI 1573-4994
  • 通讯作者地址:  
  • 被引频次:   1
  • DOI:   10.1007/s10895-022-03113-y EA DEC 2022
  • 出版年:   2023

▎ 摘  要

Detection of water in organic solvents gained much importance as these solvents have been used as a medium for conducting organic reactions and water was considered as an inhibitor, when it is present in the reaction medium. There are number of methods available to measure the water content in organic solvents, however, such methods are time consuming and expensive. Here, we developed a facile method for detecting water in organic solvents using an inexpensive fluorescent probe - Rhodamine B decorated Graphene oxide (RBGO). The fluorescent probe, RBGO can be conveniently prepared by mixing the rhodamine B (RB) with graphene oxide (GO) in water. However, the probe will function as a sensor for water in the organic solvents through the release of dye upon interaction with the water present in organic solvents. Surprisingly, combination of cucurbit[7]uril (CB[7]) and RBGO increased the sensitivity of this sensor dramatically for the detection of water. This is the first example of water sensor with best detection limit by the involvement of host molecules such as CB[7]. This sensor displayed the low limit of detection (LOD) for organic solvents (LOD: 0.0015% for DMSO, 0.0025% for DMF), through the two-way process such as decomplexation and encapsulation. We presume that the role of CB [7] can be implemented in other similar sensors to enhance the sensitivity.