Development of sensitive and selective food sensors using new Re(I)-Pt(II) bimetallic complexes to detect volatile biogenic sulfides formed by meat spoilage.
Detection of volatile biogenic sulfides (VBS) plays a crucial role in food safety because the amounts of these compounds can reflect the freshness of meat. A new indicator-displacement assay with Re(I)-Pt(II) complexes, [Re(Lig)(CO)3(bridge)]-[Pt(DMSO)(Cl)2] (1: Lig=5-phenyl-1,10-phenanthroline and bridge=NCS(-); 2: Lig=5-phenyl-1,10-phenanthroline and bridge=CN(-); 3: Lig=2,2'-biquinoline and bridge=NCS(-)), was demonstrated to be a very effective sensing method to VBS. The results indicated that the control of Re(I)-bridge-Pt(II) and Re(I)-ligand combination are able to regulate their sensing selectivity and sensitivity. This system was successfully applied to detect CH3SCH3 in real rotten pork with a linear luminometric response up to 20.0mgkg(-1) (R=0.997) with the detection limit as 0.05 mgkg(-1). Complex 1 also gave comparable results on the detection of VBS with respect to those determined by GCMS with recovery range from 76% to 102% (RSD%=13.8).
Department of Science and Environmental Studies, The Education University of Hong Kong, 10 Lo Ping Road, Tai Po, Hong Kong SAR, China; College of Chemistry and Chemical Engineering, Southwest University, Chong Qing, China; Centre for Education in Environmental Sustainability, The Education University of Hong Kong, 10 Lo Ping Road, Tai Po, Hong Kong SAR. Electronic address: cfchow@ied.edu.hk.
Cheuk-Fai
CF
Chow
Centre for Education in Environmental Sustainability, The Education University of Hong Kong, 10 Lo Ping Road, Tai Po, Hong Kong SAR.
Pui-Yu
PY
Ho
Centre for Education in Environmental Sustainability, The Education University of Hong Kong, 10 Lo Ping Road, Tai Po, Hong Kong SAR; School of Pharmaceutical Science, Wenzhou Medical University, University-town, Wenzhou, Zhejiang, China.
Dong
D
Sun
Institute of Natural Medicine and Green Chemistry, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China.
Yu-Jing
YJ
Lu
Centre for Education in Environmental Sustainability, The Education University of Hong Kong, 10 Lo Ping Road, Tai Po, Hong Kong SAR.
Wing-Leung
WL
Wong
Department of Science and Environmental Studies, The Education University of Hong Kong, 10 Lo Ping Road, Tai Po, Hong Kong SAR, China; College of Chemistry and Chemical Engineering, Southwest University, Chong Qing, China. Electronic address: qiantang@swu.edu.cn.
Qian
Q
Tang
Department of Science and Environmental Studies, The Education University of Hong Kong, 10 Lo Ping Road, Tai Po, Hong Kong SAR, China; College of Chemistry and Chemical Engineering, Southwest University, Chong Qing, China. Electronic address: gongcbtq@swu.edu.cn.
Cheng-Bin
CB
Gong
D000818:Animals; D056831:Coordination Complexes; D004121:Dimethyl Sulfoxide / Q000737:chemistry; D061353:Food Storage; D010618:Phenanthrolines / Q000737:chemistry; D010984:Platinum / Q000737:chemistry*; D011804:Quinolines / Q000737:chemistry; D000069466:Red Meat / Q000032:analysis*; D012211:Rhenium / Q000737:chemistry*; D012680:Sensitivity and Specificity; D013440:Sulfides / Q000032:analysis*; D013552:Swine; D055549:Volatile Organic Compounds / Q000032:analysis*
D056831:Coordination Complexes; D010618:Phenanthrolines; D011804:Quinolines; D013440:Sulfides; D055549:Volatile Organic Compounds; C419881:2,2'-biquinoline; D010984:Platinum; C090893:5-phenyl-1,10-phenanthroline; D012211:Rhenium; D004121:Dimethyl Sulfoxide
Bimetallic complexes; Chemodosimeters; Food sensing; Freshness sensors chemodosimetric detection; Indicator-displacement assay