Chemiluminescence energy transfer reaction for the on-line preparation of peroxymonocarbonate and Eu(II)-dipicolinate complex.
In this work, an on-line preparation of peroxymonocarbonate was formed innovatively, which offered a reliable intermediate for further investigation. The forming conditions of on-line peroxymonocarbonate ions were investigated in detail. Meanwhile, the energy transfer chemiluminescent reaction of peroxymonocarbonate and the Eu(II)-dipicolinate complex was studied. Through UV-visible absorption spectra, CL method, ESR spin-trapping technique, and mass spectrum experiments, it can be concluded that peroxymonocarbonate oxidizes Eu(II) to Eu(III), and simultaneously creates radicals. The bond rearrangement within radicals formed the singlet molecular oxygen. The energy originating from the singlet oxygen was accepted by the (Eu(III)dipic)- complex. The excited (Eu(III)dipic)- ions underwent radiative deactivation and emitted the chemiluminescence. The peroxymonocarbonate system was a simple, inexpensive, and relatively nontoxic alternative to other oxidants, and it can be used in a mild, neutral-pH environment.
Liu
Meilin
M
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing, 100085, China. jmlin@mail.rcees.ac.cn
Zhao
Lixia
L
Lin
Jin-Ming
JM
D002254:Carbonates / Q000737:chemistry*; D004735:Energy Transfer; D005063:Europium / Q000737:chemistry*; D005609:Free Radicals / Q000737:chemistry; D049449:Luminescence; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D010848:Picolinic Acids / Q000737:chemistry*; D012680:Sensitivity and Specificity; D013056:Spectrophotometry, Ultraviolet / Q000379:methods
D002254:Carbonates; D005609:Free Radicals; D009942:Organometallic Compounds; D010848:Picolinic Acids; C512862:peroxycarbonic acid; D005063:Europium; C004860:dipicolinic acid