Related Products of 16961-25-4. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: Hydrogen tetrachloroaurate(III) trihydrate, is researched, Molecular AuCl4H7O3, CAS is 16961-25-4, about Electrokinetic preseparation and molecularly imprinted trapping for highly selective SERS detection of charged phthalate plasticizers. Author is Yang, Yuanyuan; Li, Yuanting; Zhai, Wenlei; Li, Xuejian; Li, Dan; Lin, Hualin; Han, Sheng.
Nonspecific binding and weak spectral discernment are the main challenges for surface-enhanced Raman scattering (SERS) detection, especially in real sample anal. Herein, molecularly imprinted polymer (MIP)-based core-shell AuNP@polydopamine (AuNP@PDA-MIP) nanoparticles (NPs) are designed and immobilized on an electrochem. reduced MoS2-modified screen-printed electrode (SPE). This portable electrochem.-Raman interface offers the dual functions of electrokinetic presepn. (EP) and MIP trapping of charged mols. so that a reliable SERS recognition with mol. selectivity and high sensitivity can be achieved. Core-shell AuNP@PDA-MIP NPs can be controllably synthesized, possess predesigned specific recognition, and provide “”hot spots”” at the junction of NPs. The introduction of an elec. field enables the autonomous exclusion and separation of similarly charged mols. as well as attraction and concentration of the oppositely charged mols. by electrostatic attraction. Subsequently, the specific MIP recognition cavities allow selective adsorption of targets on the interface without the interference of analogs. Owing to the distinctive design of the multiple coupling separation, trapping, and enrichment strategies, the MIP-based SERS-active interface can be used for label-free detection of charged mols. in real samples without pretreatment. As a proof-of-concept study, label-free SERS detection of charged phthalate plasticizers (PAEs) was demonstrated with a detection limit as low as 2.7 x 10-12 M for di-Me phthalate (DMP) and 2.3 x 10-11 M for di(2-ethylhexyl) phthalate (DEHP). This sensing strategy for in situ SERS anal. of charged pollutants or toxins holds vast promises for a wide range of in-field applications.
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Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem