A novel polychloromethylstyrene coated superparamagnetic surface molecularly imprinted core–shell nanoparticle for bisphenol A

Abstract

The superparamagnetic surface molecularly imprinted Fe 3 O 4 @MIP nanoparticles for bisphenol A (BPA) were prepared via surface initiated atom transfer radical polymerization (si-ATRP). The Fe 3 O 4 core was compactly encapsulated with a polychloromethylstyrene (PCMS) layer via mini-emulsion polymerization. Fe 3 O 4 @MIP exhibited superparamagnetic property with saturation magnetization of 25.2 emu g À1 . The BPA imprinted Fe 3 O 4 @MIP revealed specific selectivity and high affinity to the template BPA over structural analogues. Moreover, the surface-imprinted MIP nanoparticles showed good site accessibility for BPA. The compactly PCMS-coated Fe 3 O 4 @MIP maintained its response ability to a magnetic field at acidic and alkaline conditions. Fe 3 O 4 @MIP was used to determine BPA in tap water samples with good accuracy and precision.

Molecularly imprinted polymer grown on multiwalled carbon nanotube surface for the sensitive electrochemical determination of amoxicillin

“…Recently, several nanomaterials were chosen as supporting materials for surface imprinting, such as SiO 2 [26], [27], Fe 3 O 4 @SiO 2 [28] and Au NP [29], quantum dot [30] and MWCNT [31] due to their large surface and easy functionalization. For electrochemical sensors, the conductive property of supporting material is a critical factor because it decides the electron transfer rate of MIP.…”

Magnetic molecular imprinted polymers as a tool for isolation and purification of biological samples

“…in water) [19]. In the literature, one can also find mention of the use of chitosan [20] and polichloromethylstyrene [21] to modify the surface of the magnetite prior to the polymerization step. Some researchers [19,22] omit the step of surface modification, going straight for the penultimate stage -the formation of molecularly imprinted polymer.…”

Thermosensitive molecularly imprinted polymers on porous carriers: Preparation, characterization and properties as novel adsorbents for bisphenol A

“…That is, the release and adsorption of template/target molecules can be achieved through external stimuli regulation. Excitedly, a number of SR-MIPs have been designed and synthesized for recognition and detection of BPA [17,[20][21][22][23]. For instance, Griffete et al presented inverse opals of imprinted hydrogels for the detection of BPA and displayed large responses to external pH stimuli related to the thickness of hydrogel film [20].…”

“…For instance, Griffete et al presented inverse opals of imprinted hydrogels for the detection of BPA and displayed large responses to external pH stimuli related to the thickness of hydrogel film [20]. Liu et al described a novel core-shell BPA imprinted nanoparticle by polychloromethylstyrene coated superparamagnetic material via surface initiated atom transfer radical polymerization [21]. Lin et al adopted bisphenol F as a dummy template to prepare MIPs for BPA with a magnetic supporter which could increase the extraction efficiency [22].…”