膠體金核殼型沙丁胺醇分子印跡聚合物的光譜特征分析
[Abstract]:In order to solve the problem of rapid detection of salbutamol residues in feed and animal products, a new method for rapid detection of salbutamol was developed based on molecular imprinting technology. Salbutamol was used as template molecule. Conventional SAL molecularly imprinted polymer (molecularly imprinted polymer,MIPs) and non-molecularly imprinted polymer (non imprinted polymer NIPs).) were synthesized by bulk polymerization of methacrylic acid (methacrylic acid,MA) as functional monomer. On this basis, a novel core-shell salbutamol MIPs. was prepared by using colloidal gold particles as initiator. UV absorption spectrum (UV spectra), Fourier transform infrared spectroscopy (IR spectra) and Raman spectrum (Raman spectru), scanning electron microscope (scanning electron microscopy,SEM) were used to obtain the spectra of two kinds of imprinted materials and their related compounds. From the experimental results, it can be seen that the carboxyl groups on the Sal and MA form a stable and easily eluted 1:1 hydrogen bond complex, and the chemical binding constant is K ~ (-0.245) 脳 10 ~ (6) L ~ (2) mol~ (-2). The possible binding sites to hydrogen atoms in MA's -COOH are the oxygen atoms in SAL C-O. MIPs and the absorption peaks of -OH in MA. It is shown that the former has a red shift, and it is proved that there is a specific binding between SAL as a template molecule and MA. The redshift of absorption peak caused by the stretching vibration of C-O of MIPs is not eluted, that is, the energy loss is obvious, it is known that if the hydrogen atom of -COOH in MA is to form hydrogen bond, The possible binding sites are the oxygen atoms. MIPs in C-O in SAL molecule and the apparent functional group peaks in NIPs. After removing the SAL as a template molecule, the MIPs wash left a hole with special structure functional group chemistry and space composition, which is highly matched with SAL, which can be specifically recognized and specifically combined with the target detection molecule SAL in the solution under test. Compared with conventional MIPs, colloidal gold core-shell MIPs has more loose surface and more porous surface. As a result, the effective area of the target molecule is increased and the adsorption performance is improved. The synthesis and spectral characteristic analysis of the two imprinted materials lay a theoretical and practical foundation for the establishment of a new method for rapid detection of SAL based on molecular imprinting.
【作者單位】: 上海交通大學(xué)農(nóng)業(yè)與生物學(xué)院;
【基金】:國(guó)家自然科學(xué)基金項(xiàng)目(31372344)資助
【分類號(hào)】:O657.33;O631.3
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