Sensing study of quinoxaline analogues with theoretical calculation, single-crystal X-ray structure and real application in commercial fruit juices.

Single-crystal X-ray structures of dimeric quinoxaline aldehyde (QA), quinoxaline dihydrazone (DHQ) and HQNM (Goswami S 2013 , 5075-5077. (doi:10.1016/j.tetlet.2013.07.051); Goswami S 2014 , 20 922-20 926. (doi:10.1039/C4RA00594E); Goswami S 2014 , 6230-6235. (doi:10.1039/C4NJ01498G)) are reported along with the theoretical study. Among them, QA is not acting as an active probe, but DHQ and HQNM are serving as selective and sensitive probe for the Fe cation and the Ni cation, respectively. DHQ can also detect the Fe in commercial fruit juices (grape and pomegranate).