Document Type
Journal Article
Department/Unit
Department of Chemistry
Title
Design and synthesis of heterobimetallic Ru(II)–Ln(III) complexes as chemodosimetric ensembles for the detection of biogenic amine odorants
Language
English
Abstract
The detection of neutral biogenic amines plays a crucial role in food safety. Three new heterobimetallic Ru(II)-Ln(III) donor-acceptor complexes, KPrRu, KNdRu, and KSmRu, K{[Ru(II)(tBubpy)(CN) 4]2-Ln(III)(H2O)4} (where tBubpy = 4,4′-di-tert-butyl-2,2′-bipyridine), have been synthesized and characterized. Their photophysical and X-ray crystallographic data were reported in this study. These complexes were found to be selective for biogenic amine vapors, such as histamine, putrescine, and spermidine, with a detection limit down to the ppb level. The sensitivities of these complexes to the amines were recorded as ∼log K = 3.6-5.0. Submicron rods of the complexes, with a nanoscale diameter and microscale length, were obtained through a simple precipitation process. Free-standing polymeric films with different degrees of porosity were fabricated by blending the submicron rods with polystyrene polymer. The polymer with the highest level of porosity exhibited the strongest luminescence enhancement after amine exposure. Real time monitoring of gaseous biogenic amines was applied to real fish samples (Atlantic mackerel) by studying the spectrofluorimetric responses of the Ru(II)-Ln(III) blended polymer film. © 2013 American Chemical Society.
Publication Date
2013
Source Publication Title
Analytical Chemistry
Volume
85
Issue
17
Start Page
8246
End Page
8253
Publisher
American Chemical Society
DOI
10.1021/ac401513j
Link to Publisher's Edition
ISSN (print)
00032700
ISSN (electronic)
15206882
Recommended Citation
Chow, Cheuk-Fai, Michael H. W. Lam, and Wai-Yeung Wong. "Design and synthesis of heterobimetallic Ru(II)–Ln(III) complexes as chemodosimetric ensembles for the detection of biogenic amine odorants." Analytical Chemistry 85.17 (2013): 8246-8253.