An investigation of porous structure in molecularly imprinted polymer for sensor development: Non-linear fluorescence quenching of 17β-estradiol bound inside MIP submicron particles by sodium nitrite and methacrylamide

Molecular imprinting science and technology: a survey of the literature for the years 2004-2011

Herein, we present a survey of the literature covering the development of molecular imprinting science and technology over the years 2004-2011. In total, 3779 references to the original papers, reviews, edited volumes and monographs from this period are included, along with recently identified uncited materials from prior to 2004, which were omitted in the first instalment of this series covering the years 1930-2003. In the presentation of the assembled references, a section presenting reviews and monographs covering the area is followed by sections describing fundamental aspects of molecular imprinting including the development of novel polymer formats. Thereafter, literature describing efforts to apply these polymeric materials to a range of application areas is presented. Current trends and areas of rapid development are discussed.

Optimization of molecularly imprinted polymer method for rapid screening of 17β-estradiol in water by fluorescence quenching

A new method was optimized for rapid screening of 17β-estradiol (E2) in water under 10 min. Molecularly imprinted polymer (MIP) particles (325 ± 25 nm) were added in a water sample at pH 5.5 and 20°C to form a suspension. Fluorescence emission from E2 nonspecifically bound onto the MIP particles was first quenched by large gold nanoparticles (43 ± 5 nm). The Stern-Volmer plot was linear, with dynamic quenching constants (K_sv) of 2.9 ×10⁴ M⁻¹. Fluorescence emission from E2 specifically bound inside the MIP particles was next quenched by small nitrite anions that easily penetrated the imprinted cavities. The Stern-Volmer plot became nonlinear, with K_sv = 2.1 × 10² M⁻¹ and static quenching constant (V) below 1.0 M⁻¹. The difference between these two emission intensities varied as the initial E2 concentration in water, generating a Scatchard calibration curve with R² > 0.97 from 0.1 to 10 ppb.