In:
Chemistry – An Asian Journal, Wiley, Vol. 8, No. 11 ( 2013-11), p. 2762-2767
Abstract:
The introduction of Lawesson′s reagent into a bis‐rhodamine spirolactam system afforded a new fluorescent sensor for Cu 2+ ions, SRR , which contained a new tridentate sulfur ligand. SRR showed excellent specificity for Cu 2+ ions over other cations (including Cu + , Hg 2+ , and Fe 3+ ), very high sensitivity (10 n M ), and a rapid response time (3 min). The detection mechanism was investigated by 1 H NMR, 13 C NMR, 31 P NMR, and ESR spectroscopy, MS, and Gaussian calculations. Coordination of a Cu 2+ ion to the tridentate sulfur ligand, which promotes ring‐opening of the rhodamine groups, followed by a spontaneous reduction reaction (Cu 2+ into Cu + ), has been proposed as the sensing mechanism.
Type of Medium:
Online Resource
ISSN:
1861-4728
,
1861-471X
DOI:
10.1002/asia.201300534
Language:
English
Publisher:
Wiley
Publication Date:
2013
detail.hit.zdb_id:
2233006-9
