title: A metal (Co)-organic framework-based chemiluminescence system for selective detection of L-cysteine.
abstract: A metal (Co)-Organic Framework (Co-MOF) was first found to catalyze the chemiluminescence (CL) of luminol. On the basis of X-ray photoelectron spectroscopy, powder X-ray diffraction, CL spectral, UV-visible absorption spectral, and electron spin resonance (ESR) spectral studies, as well as the research of the influence of various free radical scavengers, a possible CL mechanism was proposed. The enhanced CL might be attributed to the formation of a peroxide analogous complex between the oxygen-related radicals and the active metal site of the Co-MOF material. The established Co-MOF-luminol CL system was successfully applied to determine L-cysteine (CySH), based on the selective and sensitive enhancing effect of CySH on this CL system. Under the optimized conditions, CySH was selectively detected in the range 0.1-10 μM with a detection limit of 18 nM. This novel CL system obviously gives impetus to the new research field of metal-organic frameworks (MOFs) in chemiluminescence.
authors.affiliation: Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, P. R. China. lvy@scu.edu.cn.
authors.forename: Na
authors.initials: N
authors.lastname: Yang
authors.forename: Hongjie
authors.initials: H
authors.lastname: Song
authors.forename: Xiangyu
authors.initials: X
authors.lastname: Wan
authors.forename: Xiaoqing
authors.initials: X
authors.lastname: Fan
authors.forename: Yingying
authors.initials: Y
authors.lastname: Su
authors.forename: Yi
authors.initials: Y
authors.lastname: Lv
mesh_terms: D003035:Cobalt / Q000737:chemistry*; D003545:Cysteine / Q000032:analysis* / Q000737:chemistry; D008163:Luminescent Measurements / Q000379:methods*; D008165:Luminol / Q000737:chemistry; D009942:Organometallic Compounds / Q000737:chemistry*
chemical_list: D009942:Organometallic Compounds; D003035:Cobalt; D008165:Luminol; D003545:Cysteine