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

Authors :
Thomas R. Brown
Hee-Seung Lee
Robert D. Hancock
Bruna B. Correia
Joseph H. Reibenspies
Source :
Polyhedron. 179:114366
Publication Year :
2020
Publisher :
Elsevier BV, 2020.

Abstract

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

Details

ISSN :
02775387
Volume :
179
Database :
OpenAIRE
Journal :
Polyhedron
Accession number :
edsair.doi...........cefff0e43b7f388b8826f2f9859faf7b
Full Text :
https://doi.org/10.1016/j.poly.2020.114366