Miktoarm Star Copolymers Prepared by Transformation from Enhanced Spin Capturing Polymerization to Nitroxide-Mediated Polymerization (ESCP-Ŧ-NMP) toward Nanomaterials

Reversible-deactivation radical polymerization (RDRP) serves as a powerful tool nowadays for the preparations of unique linear and non-linear macromolecules. In this study, enhanced spin capturing polymerizations (ESCPs) of styrene (St) and tert-butyl acrylate (tBA) monomers were, respectively, conducted in the presence of difunctional (1Z,1'Z)-1,1'-(1,4-phenylene) bis (N-tert-butylmethanimine oxide) (PBBN) nitrone. Four-arm (PSt)4 and (PtBA)4 star macroinitiators (MIs) can be afforded. By correspondingly switching the second monomer (i.e., tBA and St), miktoarm star copolymers (μ-stars) of (PSt)2-μ-(PtBA-b-PSt)2 and (PtBA)2-μ-(PSt-b-PtBA)2) were thus obtained. We further conducted hydrolysis of the PtBA segments to PAA (i.e., poly(acrylic acid)) in μ-stars to afford amphiphilic μ-stars of (PSt)2-μ-(PAA-b-PSt)2 and (PAA)2-μ-(PSt-b-PAA)2. We investigated each polymerization step and characterized the obtained two sets of "sequence-isomeric" μ-stars by FT-IR, 1H NMR, differential scanning calorimeter (DSC), and thermogravimetric analysis (TGA). Interestingly, we identified their physical property differences in the case of amphiphilic μ-stars by water contact angle (WCA) and atomic force microscopy (AFM) measurements. We thus proposed two microstructures caused by the difference of polymer chain sequences. Through this polymerization transformation (Ŧ) approach (i.e., ESCP-Ŧ-NMP), we demonstrated an interesting and facile strategy for the preparations of μ-stars with adjustable/switchable interior and exterior polymer structures toward the preparations of various nanomaterials.

A cross-sectional survey to map Clinical Pharmacy Education and Practice in Europe

Background Clinical activities provided by pharmacists are increasing worldwide, including in Europe. However, an overview of clinical pharmacy education and practice is needed. Aim To map clinical pharmacy (CP) education and practice among European countries. Method A cross-sectional web-based survey led by the Education Committee of the European Society of Clinical Pharmacy (ESCP) was conducted. The survey comprised three domains focusing on: undergraduate education, postgraduate education, and practice. A multi-phased validation process was undertaken, attributing levels of evidence according to the number of information sources for each country. Triangulation was used to seek within country consensus. Main outcome measures included the number of hours of education in CP; existence of a specialization in CP and activities delivered in practice. Results Data from 40 European countries were included (response rate 95.2%). Most respondents (86.8%) agreed with the ESCP definition of CP. Almost every country (94.9%) reported CP topics at the undergraduate level [median number = 65 h/semester (IQR: 2.0-5.6)], including practical teaching [median = 30.0% (IQR: 17.0-42.0)]. At postgraduate level, 92.5% of countries reported PhD programmes including CP and 65.0% mentioned the existence of specific CP master/diploma degrees. Continuous professional development (CPD) courses were also reported by 63.9% of respondents. More than half the countries (52.5%; n = 21) recognized CP as an area of specialization, which for 60.0% of participants was applied solely in the hospital setting. Conclusion Although CP is embedded in education and practice in European countries, there is wide variability in education and practice patterns.

New Variants of Nitroxide Mediated Polymerization

Nitroxide-mediated polymerization is now a mature technique, at 35 years of age. During this time, several variants have been developed: enhanced spin capture polymerization (ESCP), photoNMP (NMP2), chemically initiated NMP (CI-NMP), spin label NMP (SL-NMP), and plasmon-initiated NMP (PI-NMP). This mini-review is devoted to the features and applications of these variants.