TY - JOUR
T1 - Design and synthesis of heterobimetallic Ru(II)-Ln(III) complexes as chemodosimetric ensembles for the detection of biogenic amine odorants
AU - Chow, Cheuk Fai
AU - Lam, Michael H.W.
AU - WONG, Wai Yeung
N1 - The work described in this paper was funded by a grant fromthe Hong Kong Institute of Education (Project Nos. R3321 and R3263) and a grant from the Research Grants Council of Hong Kong SAR, China (ECS No. 800312).
PY - 2013/9/3
Y1 - 2013/9/3
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84883479857&partnerID=8YFLogxK
U2 - 10.1021/ac401513j
DO - 10.1021/ac401513j
M3 - Journal article
C2 - 23883419
AN - SCOPUS:84883479857
SN - 0003-2700
VL - 85
SP - 8246
EP - 8253
JO - Analytical Chemistry
JF - Analytical Chemistry
IS - 17
ER -