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1. One-step fabrication of cinchona-based hybrid monolithic chiral stationary phases via photo-initiated thiol-ene polymerization for cLC enantioseparation

Author:
Ma, Shujuan; Wang, Yan; Zhang, Haiyang; Li, Ya; Ou, Junjie; Wei, Yinmao; Ye, Mingliang
Source:
Talanta 2019 v.198 pp. 432-439
ISSN:
0039-9140
Subject:
polymerization,   etc   ; polymers; synthesis;     Show all 3 Subjects
Abstract:
... Although various click polymerization reactions (thiol-ene, thiol-yne, thiol-Michael, thiol-epoxy and amine-epoxy) have been utilized to prepare either hybrid or organic monolithic columns with homogeneous network structures, there were few reports on fabrication of monolithic CSPs via click polymerization. Herein, a fast and robust approach was explored to fabricate cinchona-based monolithic hybr ...
DOI:
10.1016/j.talanta.2019.02.046

2. Strong, tough, and repeatable adhesion of an alternating peptide comprising phenyl glycine as a repeating unit

Author:
Ihsan, Abu Bin; Kawaguchi, Yuta; Endo, Hiroshi; Koyama, Yasuhito
Source:
Journal of materials chemistry B 2019 v.7 no.17 pp. 2766-2770
ISSN:
2050-7518
Subject:
polymerization,   etc   ; adhesion; dipeptides; viscoelasticity;     Show all 4 Subjects
Abstract:
... A new strategy for preparing peptide-based adhesive materials is provided. An exactly alternating peptide with glycine-N-butylphenyl glycine dipeptide repeating units exhibits excellent repeatable adhesion capacity. The adhesive properties are attributed to the viscoelastic properties and microfibril formation, which are tunable by simple manipulation of the reaction component on polymerization. ...
DOI:
10.1039/c9tb00391f

3. Spontaneous Formation of a Cross-Linked Supramolecular Polymer Both in the Solid State and in Solution, Driven by Platinum(II) Metallacycle-Based Host–Guest Interactions

Author:
Shi, Bingbing; Liu, Yuezhou; Zhu, Huangtianzhi; Vanderlinden, Ryan T.; Shangguan, Liqing; Ni, Ruidong; Acharyya, Koushik; Tang, Jian-Hong; Zhou, Zhixuan; Li, Xiaopeng; Huang, Feihe; Stang, Peter J.
Source:
Journal of the American Chemical Society 2019 v.141 no.16 pp. 6494-6498
ISSN:
1520-5126
Subject:
polymerization,   etc   ; crosslinking; platinum; polymers;     Show all 4 Subjects
Abstract:
... The recent progress in platinum(II) coordination-driven supramolecular polymers has had a substantial effect on the design of functional soft materials. However, the prospect of realizing polymerization induced by platinum(II) metallacycle-based host–guest interactions has received little attention until recently. Here we report the realization of supramolecular polymerization driven by platinum(I ...
DOI:
10.1021/jacs.9b02281

4. Anion induced supramolecular polymerization: a novel approach for the ultrasensitive detection and separation of F⁻

Author:
Lin, Qi; Gong, Guan-Fei; Fan, Yan-Qing; Chen, Yan-Yan; Wang, Jiao; Guan, Xiao-Wen; Liu, Juan; Zhang, You-Ming; Yao, Hong; Wei, Tai-Bao
Source:
Chemical communications 2019 v.55 no.22 pp. 3247-3250
ISSN:
1364-548X
Subject:
polymerization,   etc   ; fluorides; naphthalene;     Show all 3 Subjects
Abstract:
... A novel approach for the ultrasensitive detection and separation of F⁻ has been successfully developed. F⁻ could induce a tripodal naphthalene imide sensor (TNA) to result in supramolecular polymerization, leading to strong AIEE. The TNA could act as an excellent recyclable material for F⁻ detection and separation. ...
DOI:
10.1039/c8cc09876j

5. Architectural Control of Isosorbide-Based Polyethers via Ring-Opening Polymerization

Author:
Saxon, Derek J.; Nasiri, Mohammadreza; Mandal, Mukunda; Maduskar, Saurabh; Dauenhauer, Paul J.; Cramer, Christopher J.; LaPointe, Anne M.; Reineke, Theresa M.
Source:
Journal of the American Chemical Society 2019 v.141 no.13 pp. 5107-5111
ISSN:
1520-5126
Subject:
polymerization,   etc   ; polymers; recycling; sublimation;     Show all 4 Subjects
Abstract:
... Isosorbide is a rigid, sugar-derived building block that has shown promise in high-performance materials, albeit with a lack of available controlled polymerization methods. To this end, we provide mechanistic insights into the cationic and quasi-zwitterionic ring-opening polymerization (ROP) of an annulated isosorbide derivative (1,4:2,5:3,6-trianhydro-d-mannitol, 5). Ring-opening selectivity of t ...
DOI:
10.1021/jacs.9b00083

6. Degenerative chain‐transfer process: Controlling all chain‐growth polymerizations and enabling novel monomer sequences

Author:
Kamigaito, Masami; Satoh, Kotaro; Uchiyama, Mineto
Source:
Journal of polymer science 2019 v.57 no.3 pp. 243-254
ISSN:
0887-624X
Subject:
polymerization,   etc   ; polymers; precision; universities;     Show all 4 Subjects
Abstract:
... The use of dormant species has opened a new era in precision polymerization and has changed the concept of living polymerization. The dormant species can be exchanged into the active species via reversible termination or via reversible chain transfer. Professor Mitsuo Sawamoto has greatly contributed to the establishment of the concepts of living cationic and radical polymerizations based on the r ...
DOI:
10.1002/pola.29257

7. Radical Approach to Thioester-Containing Polymers

Author:
Smith, Ronald A.; Fu, Guanyao; McAteer, Owen; Xu, Mizhi; Gutekunst, Will R.
Source:
Journal of the American Chemical Society 2019 v.141 no.4 pp. 1446-1451
ISSN:
1520-5126
Subject:
polymerization,   etc   ; composite polymers;     Show all 2 Subject
Abstract:
... A new approach to radical ring-opening polymerization is presented that employs a new thionolactone monomer to generate polymers with thioester-containing backbones. The use of a thiocarbonyl acceptor overcomes longstanding reactivity problems in the field to give complete ring-opening and quantitative incorporation into a variety of acrylate polymers. The resulting copolymers readily degrade unde ...
DOI:
10.1021/jacs.8b12154

8. Straightforward access to biocompatible poly(2-oxazoline)-coated nanomaterials by polymerization-induced self-assembly

Author:
LeThese authors contributed equally., Dao; Wagner, Friederike; Takamiya, Masanari; Hsiao, I-Lun; Gil Alvaradejo, Gabriela; Strähle, Uwe; Weiss, Carsten; Delaittre, Guillaume
Source:
Chemical communications 2019 v.55 no.26 pp. 3741-3744
ISSN:
1364-548X
Subject:
polymerization,   etc   ; biocompatibility; chemical compounds; nanoparticles;     Show all 4 Subjects
Abstract:
... We report the synthesis of poly(2-ethyl-2-oxazoline)-based (PEtOx) nanoobjects by polymerization-induced self-assembly (PISA). First, well-defined PEtOx macromolecular chain transfer agents were synthesized by cationic ring-opening polymerization and click chemistry. The photoinitiated PISA of 2-hydroxypropyl methacrylate mediated by these PEtOx produced nanoobjects spanning the full range of core ...
DOI:
10.1039/c9cc00407f

9. Kinetics analysis and simulation of sequential epoxy dual-curing systems with independent thermal activation

Author:
Santín, David; Konuray, Osman; Fernàndez-Francos, Xavier; Ramis, Xavier
Source:
Thermochimica acta 2019 v.673 pp. 158-168
ISSN:
0040-6031
Subject:
polymerization,   etc   ; condensation reactions; epoxides; temperature;     Show all 4 Subjects
Abstract:
... The curing kinetics of a sequential dual-curing system based on an off-stoichiometric amine-epoxy formulation with intermediate latent reactivity has been analyzed. The first curing stage is an epoxy-amine polycondensation taking place at low temperatures, while the second curing stage is an anionic homopolymerization of the excess epoxy groups, taking place at high temperatures and catalyzed by a ...
DOI:
10.1016/j.tca.2019.01.023

10. Electrochemically mediated atom transfer radical polymerization with dithiocarbamates as alkyl pseudohalides

Author:
Wang, Yi; Fantin, Marco; Matyjaszewski, Krzysztof
Source:
Journal of polymer science 2019 v.57 no.3 pp. 376-381
ISSN:
0887-624X
Subject:
polymerization,   etc   ; catalysts; electrochemistry; polymethylmethacrylate; styrene;     Show all 5 Subjects
Abstract:
... Electrochemically mediated atom transfer radical polymerizations (ATRPs) provide well‐defined polymers with designed dispersity as well as under external temporal and spatial control. In this study, 1‐cyano‐1‐methylethyl diethyldithiocarbamate, typically used as chain‐transfer agent (CTA) in reversible addition–fragmentation chain transfer (RAFT) polymerization, was electrochemically activated by ...
DOI:
10.1002/pola.29197

11. The synthesis of cyclic polymers by olefin metathesis: Achievements and challenges

Author:
Edwards, Julian P.; Wolf, William J.; Grubbs, Robert H.
Source:
Journal of polymer science 2019 v.57 no.3 pp. 228-242
ISSN:
0887-624X
Subject:
polymerization,   etc   ; olefin; physical properties; polymers;     Show all 4 Subjects
Abstract:
... Cyclic polymers have drawn considerable interest for their peculiar physical properties in comparison to linear polymers, despite their equivalent compositions. Synthetically, cyclic polymers can be accessed through either macrocyclic ring‐closure or by ring‐expansion polymerization, but the main challenge with either method is the production of highly pure cyclic polymer samples. This highlight d ...
DOI:
10.1002/pola.29253

12. Porous Polystyrene Monoliths Prepared from in Situ Simultaneous Interpenetrating Polymer Networks: Modulation of Morphology by Polymerization Kinetics

Author:
Utroša, Petra; Žagar, Ema; Kovačič, Sebastijan; Pahovnik, David
Source:
Macromolecules 2019 v.52 no.3 pp. 819-826
ISSN:
1520-5835
Subject:
polymerization,   etc   ; hydrolysis; organocatalysts; polystyrenes; styrene;     Show all 5 Subjects
Abstract:
... Semi-interpenetrating polymer networks (semi-IPNs) were prepared by in situ simultaneous orthogonal polymerizations, where the linear poly(ε-caprolactone) (PCL) was synthesized by ring-opening polymerization of ε-caprolactone and the poly(styrene-co-divinylbenzene) (PS) network was formed by free-radical polymerization of styrene/divinylbenzene. Semi-IPNs were used as the precursors for the prepar ...
DOI:
10.1021/acs.macromol.8b01923

13. MALDI-MS for polymer characterization – Recent developments and future prospects

Author:
Drzeżdżon, Joanna; Jacewicz, Dagmara; Sielicka, Alicja; Chmurzyński, Lech
Source:
Trends in analytical chemistry 2019 v.115 pp. 121-128
ISSN:
0165-9936
Subject:
polymerization,   etc   ; desorption; mass spectrometry; molecular weight; polymers;     Show all 5 Subjects
Abstract:
... The development of new polymerization methods and, consequently, the generation of new polymeric materials, is associated with the development of methods for testing the properties of these materials.The matrix assisted laser desorption and ionization - mass spectrometry method (MALDI-MS) is the technique used to study various polymers. The most important advantages of this method include the abil ...
DOI:
10.1016/j.trac.2019.04.004

14. Controlled release studies through chitosan-based hydrogel synthesized at different polymerization stages

Author:
Md Rasib, Siti Zalifah; Md Akil, Hazizan; Khan, Abbas; Abdul Hamid, Zuratul Ain
Source:
International journal of biological macromolecules 2019 v.128 pp. 531-536
ISSN:
0141-8130
Subject:
polymerization,   etc   ; drugs; hydrogels; pH; rifampicin; temperature;     Show all 6 Subjects
Abstract:
... An earlier study showed that the behaviour of chitosan-poly(methacrylic acid‑co‑N‑isopropylacrylamide) [chitosan‑p(MAA‑co‑NIPAM)] hydrogels synthesized at different reaction times are affected with regard to their pH and temperature sensitivities. The study was continued in this paper to identify the effects of different reaction times on the degradation, efficiency of rifampicin (Rif) loading and ...
DOI:
10.1016/j.ijbiomac.2019.01.190

15. Methyl methacrylate as solvent for the thermal decomposition of the cyclic molecule pinacolone diperoxide: Toward the polymerization process

Author:
Delgado‐Rodríguez, Karla; Enríquez‐Medrano, Francisco J.; Espinoza‐Martínez, Adriana Berenice; Barreto, Gastón P.; Merino, Gabriel; Morales, Graciela
Source:
Journal of polymer science 2019 v.57 no.9 pp. 997-1007
ISSN:
0887-624X
Subject:
polymerization,   etc   ; polymers; solvents; temperature; thermal degradation;     Show all 5 Subjects
Abstract:
... The decomposition rate constant (kd) of pinacolone diperoxide (PDP, 3,6‐diterbutyl‐3,6‐dimethyl‐1,2,4,5‐tetraoxacyclohexane) in methyl methacrylate (MMA) is determined by the kinetic study of its thermal decomposition at temperatures from 110 °C to 140 °C. The calculated kd values for PDP are higher than the corresponding values previously determined and reported for diethyl ketone triperoxide (DE ...
DOI:
10.1002/pola.29355

16. Ring‐opening polymerization of (Macro)lactones by highly active mononuclear salen–aluminum complexes bearing cyclic β‐ketoiminato ligand

Author:
Huang, Hai‐Chao; Wang, Bin; Chen, Xiao‐Lu; Pan, Li; Li, Yue‐Sheng
Source:
Journal of polymer science 2019 v.57 no.9 pp. 973-981
ISSN:
0887-624X
Subject:
polymerization,   etc   ; catalytic activity; lactones; ligands; moieties; polyesters;     Show all 6 Subjects
Abstract:
... In this contribution, we explored the catalytic ring‐opening polymerization (ROP) of (macro)lactones using salen–aluminum complexes bearing cyclic β‐ketoiminato ligand. The effects of bridge moiety and ring size in the benzocyclane skeleton on the catalytic activity of these complexes were thoroughly investigated. Complex 5 with 2,2‐dimethylpropylene bridge and five‐membered cyclane ring can effic ...
DOI:
10.1002/pola.29350

17. Recent advances and trends of molecularly imprinted polymers for specific recognition in aqueous matrix: Preparation and application in sample pretreatment

Author:
Zhou, Tianyu; Ding, Lan; Che, Guangbo; Jiang, Wei; Sang, Lei
Source:
Trends in analytical chemistry 2019 v.114 pp. 11-28
ISSN:
0165-9936
Subject:
polymerization,   etc   ; absorbents; biopolymers; free radicals; hydrophilicity;     Show all 5 Subjects
Abstract:
... Molecularly imprinted polymers (MIPs), as artificially fabricated selective absorbents, have exhibited great potential for selective separation and enrichment of trace targets in complicated matrix. However, preparing MIPs for specific recognition in aqueous matrix often face enormous challenges, which greatly limit the wide application of MIPs for selectively analyzing targets in water-containing ...
DOI:
10.1016/j.trac.2019.02.028

18. A general method to fabricate MoO₃/C composites and porous C for asymmetric solid-state supercapacitors

Author:
Jiang, Yu; Yan, Xuemin; Cheng, Yapeng; Zhang, Yan; Xiao, Wei; Gan, Lu; Tang, Haolin
Source:
RSC advances 2019 v.9 no.23 pp. 13207-13213
ISSN:
2046-2069
Subject:
polymerization,   etc   ; electrochemistry; electrodes; energy density; hydrogels; ions;     Show all 6 Subjects
Abstract:
... MoO₃ is one of the most promising electrodes for high energy density supercapacitors due to its layered structure, which facilitates the insertion/removal of small ions. However, the commercial recognition of MoO₃-based electrodes has been hampered by their low electronic conductivity, poor structural stability and narrow working potential window. A MoO₃/C composite (MCs) has been synthesized by a ...
DOI:
10.1039/c8ra10232e

19. Bi-continuous emulsion using Janus particles

Author:
Sun, Dayin; Si, Yan; Song, Xi-Ming; Liang, Fuxin; Yang, Zhenzhong
Source:
Chemical communications 2019 v.55 no.32 pp. 4667-4670
ISSN:
1364-548X
Subject:
polymerization,   etc   ; chemical compounds; emulsions; nanoparticles; water content;     Show all 5 Subjects
Abstract:
... Bi-continuous emulsion stabilized with amphiphilic Janus particles was achieved. Phase inversion of the as-formed emulsion was driven by increasing water content. The orientated Janus particle monolayer at the bi-continuous emulsion interface is interconnected by interfacial polymerization to form robust materials with amphiphilic channels. ...
DOI:
10.1039/c9cc01191a

20. Sterically Controlled Self-Assembly of a Robust Multinuclear Palladium Catalyst for Ethylene Polymerization

Author:
Liu, Qian; Jordan, Richard F.
Source:
Journal of the American Chemical Society 2019 v.141 no.17 pp. 6827-6831
ISSN:
1520-5126
Subject:
polymerization,   etc   ; catalysts; ethylene; ligands; palladium; polyethylene;     Show all 6 Subjects
Abstract:
... The self-assembly and reactivity of a robust multinuclear Pd catalyst based on the sterically expanded phosphine-bis-arenesulfonate ligand PPh(2-SO₃–-4,5-(OMe)₂-Ph)₂ (OPO²–, 2) are described. The reaction of Li₂[2] with (COD)PdMeCl and 4-(5-nonyl)-pyridine (py′) generates the tetranuclear complex {(OPO-Li)PdMe(py′)}₄Li₂Cl₂ (3) in which four (phosphine-sulfonate)PdMe(py′) units are arranged around ...
DOI:
10.1021/jacs.9b02465