Mono-N-benzyl cyclen: A highly selective, multi-functional 'turn-on' fluorescence sensor for Pb2+, Hg2+ and Zn2+

Autor:	Thomas R. Brown, Hee-Seung Lee, Robert D. Hancock, Bruna B. Correia, Joseph H. Reibenspies
Rok vydání:	2020
Předmět:	Chemistry Metal ions in aqueous solution Fluorescence Ion Inorganic Chemistry Metal Turn (biochemistry) Crystallography chemistry.chemical_compound Cyclen visual_art Materials Chemistry visual_art.visual_art_medium Benzyl group Chelation Physical and Theoretical Chemistry
Zdroj:	Polyhedron. 179:114366
ISSN:	0277-5387
DOI:	10.1016/j.poly.2020.114366
Popis:	Metal complexing and fluorescence properties of MB-cyclen (1-phenylmethyl-1,4,7,10-tetraazacyclododecane) and its complexes with metal ions in 50% CH3OH/H2O are described. The crystallographic structures of the complexes [(Zn(MB-cyclen))2OH](ClO4)3(2·13H2O), [Ag(MB-cyclen)(ClO4)], [Pb(MB-cyclen)(ClO4)2], [Hg(MB-cyclen)(ClO4)2], [Cu(MB-cyclen)(ClO4)2], and [Ni(MB-cyclen)(ClO4)2] are reported. The normal fluorescence peak of the benzyl group was observed at 289 nm and only the ZnII ion showed a strong CHEF (chelation enhanced fluorescence) effect for the 289 nm peak, which is in line with its lower position in the well-known order of ability to form fluorescence quenching π contacts: ZnII ≪ CdII
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::cefff0e43b7f388b8826f2f9859faf7b https://doi.org/10.1016/j.poly.2020.114366 Zobrazit plný text záznamu Full Text from ScienceDirect