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
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.
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U2 - 10.1021/ac401513j
DO - 10.1021/ac401513j
M3 - RGC 21 - Publication in refereed journal
C2 - 23883419
SN - 0003-2700
VL - 85
SP - 8246
EP - 8253
JO - Analytical Chemistry
JF - Analytical Chemistry
IS - 17
ER -