Xianjing Zhou

• Zhejiang Sci-Tech University

Triazoliums are a family of five-membered heterocyclic cations that contain three nitrogen and two carbon atoms. In contrast to the widely studied imidazolium cations, triazoliums are less explored. In terms of the chemical structure, triazolium replaces a carbon atom in the imidazolium cation ring with an electron-withdrawing nitrogen atom, which...

Herein, the adsorption of polystyrene (PS) on phenyl-modified SiO2–Si substrates was investigated. Different from those on neat SiO2–Si substrate, the growth rate (vads) in the linear regime and hads/Rg (hads,...

Poly(ionic liquid)s (PILs) are promising candidates used as solid electrolytes because of their excellent electrochemical properties and improved processability. Introducing light-sensitive groups to PILs appears as an attractive strategy for developing novel smart PIL-based electronic devices. In this work, a new photoresponsive PIL-based solid el...

Integrating covalent organic framework (COF)-metal organic framework (MOF) hybrid materials is an effective way to develop a ratiometric fluorescent method. Herein, we firstly reported a strategy for growth of lanthanide...

Cyclic polymers have recently attracted more and more attention due to their unique structures and performance, but their synthesis still presents great challenges. The commonly used ring-closure strategy to synthesize...

Bacterial keratitis (BK) and related inflammatory diseases causes irreversible damage to the corneal tissue. In this study, a novel polyacrylamide semi-interpenetrating network hydrogel including quaternized chitosan and tannic acid (PAM-QCS-TA) were used to construct a novel antibacterial and antioxidant contact lens. The obtained hydrogels showed...

Poly(ionic liquid)s, sometimes termed polymerized ionic liquids or polymeric ionic liquids (PILs), have been recognized as a unique class of ionic polymers, which are normally the polymerization products of ionic liquid (IL) monomers. The rapid progress in the PIL research is demonstrated by many scientific publications from 2009 till now, and newl...

Graphene and its derivatives are a classical group of two-dimensional (2D) building blocks possessing excellent mechanical and/or electrical properties in favor of preparing flexible electronic devices. Natural materials, such as nacre, provide inspiration and an exciting guideline for assembling 2D nanosheets into functional nanocomposites. In thi...

Tethering a quaternary ammonium (QA)-based poly(ionic liquid) (PIL) onto substrate surfaces appears to be an attractive strategy for the development of antibacterial surfaces. In this work, N-alkyl QA-type PIL brushes were prepared via surface-initiated atom transfer radical polymerization, and their antibacterial activities against E. coli and S....

Over the past few decades, global paper consumption has continued to increase. The growing demand for paper has aggravated the negative impact on the environment. Therefore, the development of erasable ink or rewritable paper seems to be an ideal way to alleviate this crisis. In this work, a hydrophilic anthracene derivative with nucleophilic subst...

In this communication, a one‐step synthetic route is reported toward free‐standing metal‐nanoparticle‐functionalized gradient porous polyelectrolyte membranes (PPMs). The membranes are produced by soaking a glass‐plate‐supported blend film that consists of a hydrophobic poly(ionic liquid) (PIL), poly(acrylic acid), and a metal salt, into an aqueous...

Highly sensitive and selective detection of trace Cu²⁺ over fourteen kinds of metal ions in aqueous solutions was achieved by the use of a novel contrast-enhancing fluorescent microgels. The microgels were prepared by the use of N-isopropylacrylamide and 1-vinylimidazole as monomers and fluorescent tetraphenylethene (TPE) derivatives as cross-linke...

A method based on the PeakForce QNM atomic force microscopic (AFM) adhesion measurement is employed to investigate the glassy dynamics of polystyrene (PS) single-chain particles end-grafted to SiO2—Si substrates with different diameters, D0, of 3.4 nm–8.8 nm and molar masses, Mn, of 8–123 kg/mol. As temperature was increased, the adhesion force, Fa...

In this study, we designed and synthesized the hybrid microgels with positively charged cross-linking network and embedded gold nanoparticles. The hybrid microgels presented reversible thermo-sensitive behavior and the volume transition temperature of ~37 oC, which was close to body temperature. These microgels were successfully applied as vectors...

Degradable and thermo-sensitive microgels were successfully prepared via simultaneous quaternization and siloxane condensation during surfactant-free emulsion polymerization with N-vinylcaprolactam (NVCL) as main monomer, and 1-vinylimidazole (VIM) as co-monomer in the presence of (3-bromopropyl)trimethoxysilane (BPTMOS). The formation mechanism of...

It is mostly reported that graphene lattice doped/codoped with heteroatoms (e.g., nitrogen and boron) in an in‐plane fashion exhibits an impressive oxygen reduction reaction (ORR) electrocatalytic efficiency when serving as a metal‐free catalyst, but the cases that graphene sheets functionalized with heteroatoms in an out‐plane scenario are rarely...

Capture and conversion of CO2 are of great importance for environment-friendly and sustainable development of human society. Poly(ionic liquid)s (PILs) combine some unique properties of ILs with that of polymers and are versatile materials for CO2 utilization. In this contribution, we briefly outline innovative poly(ionic liquid)s emerged over the...

Capture and conversion of CO2 are of great importance for environment-friendly and sustainable development of human society. Poly(ionic liquid)s (PILs) combine some unique properties of ILs with that of polymers and are versatile materials for CO2 utilization. In this contribution, we briefly outline innovative poly(ionic liquid)s emerged over the...

Poly(ionic liquid)s (PILs) can self-assemble into polymeric nanoparticles with highly ordered inner structures, which make them potential candidates for antibacterial agents because of their highly concentrated local charges. However, investigation on the antibacterial application of self-assembled PIL nanoparticles has seldom involved. Here, alkyl...

Tetra(4-pyridyl) porphyrin (TPyP) functionalized thermosensitive ionic microgels (TPyP5-MGs) were synthesized by a two-step quaternization method. The obtained TPyP5-MGs have hydrodynamic radius of about 189 nm with uniform size distribution and exhibit thermosensitive character. The TPyP5-MG microgel suspensions can optically response to trace Pb2...

In order to investigate protein-resistant surfaces with heterogeneous nanopatterns, V-shaped polymer brushes composed of a hydrophilic methoxypoly(ethylene glycol) (mPEG) arm and a hydrophobic polystyrene (PS) or fluorinated poly(methyl methacrylate) (PMMA-b-PFMA) arm were prepared in which the surface structure and phase-separation behavior were c...

A novel engineered microgels with amphipathic network structures were designed and synthesized by copolymerizing N-isopropylacrylamide (NIPAm), 1-vinylimidazole (VIM) and 2-(cinnamoyloxy) ethyl methacrylate (CEMA) in the presence of 1, 6-dibromohexane. The engineered microgels possess hydrophilic quaternization crosslinking structures and hydrophob...

The segmental relaxation dynamics of the core and the corona in a single dry spherical micelle comprising a polystyrene (PS) or poly(methyl methacrylate) (PMMA) core and a poly(acrylic acid) (PAA) corona, along with the effects of the micelle density and the chain length of the core-forming and corona-forming polymers, were investigated by AFM. The...

A functional ionic microgel sensor array was developed by using 1-(2-pyridinylazo)-2-naphthaleno (PAN) and bromothymol blue (BTB) functionalized ionic microgels, which were designed and synthesized by quaternization reaction and anion exchange reaction, respectively. The PAN-MG and BTB-MG microgels were spherical in shape with narrow size distribut...

Thermosensitive poly(VCL-4VP-NVP) ionic microgels were prepared by in situ quaternization crosslinking reaction during surfactant free emulsion polymerization (SFEP) with N-vinylcaprolactam (VCL) as the main monomer, 4-vinylpyridine (4VP) as the quaternizable co-monomer, N-vinyl-2-pyrrolidone (NVP) as the second co-monomer and 1,6-dibromohexane (6B...

Poly(N-isopropylacrylamide)-based ionic hydrogels were synthesized by free-radical polymerization with N-isopropylacrylamide as a monomer and imidazolium-based dicationic ionic liquid as a crosslinker. The dicationic crosslinkers [Cn(Vim)2][Br]2 were obtained by quaternizing 1-vinylimidazole (Vim) with dibromo compounds (Br-CnH2n-Br) with various a...

The chain conformations and adsorption behaviors of four thermo-sensitive poly(N-isopropylacrylamide)x-poly(propylene oxide)36-poly(N-isopropylacrylamide)x (PNIPAmx-PPO36-PNIPAmx) triblock copolymers with x values of 15, 33, 75, and 117 in dilute aqueous solutions were investigated by combined techniques of micro-differential scanning calorimetry (...

4-(2-Pyridylazo)-resorcinol (PAR) functionalized thermo-sensitive ionic microgels (PAR-MG) were synthesized by a one-pot quaternization method. The PAR-MG microgels were spherical in shape with radius of ca. 166.0 nm and narrow size distribution and exhibited thermo-sensitivity in aqueous solution. The PAR-MG microgels could optically detect trace...

A post quaternized cross-linking strategy was reported to fabricate thermo-sensitive ionic microgels from thermo-sensitive linear copolymer poly(N-isopropylacrylamide-co-1-vinylimidazole) [P(NIPAm-co-VIM)] or poly(N-isopropylacrylamide-co-4-vinylpyridine) [P(NIPAm-co-4VP)] in aqueous solution at elevated temperature above its critical transition te...

Degradable thermosensitive ionic microgels were synthesized via surfactant-free emulsion polymerization (SFEP) of N-isopropylacrylamide (NIPAm) and 1-vinylimidazole (VIM) at 70 °C with degradable 1,4-phenylene bis(4-bromobutanoate) or 1,6-hexanediol bis(2-bromopropionate) as quaternized cross-linkers. VIM could be quaternized by 1,4-phenylene bis(4...

A type of thermo-sensitive ionic microgels was successfully prepared via the simultaneous quaternized crosslinking reaction during the surfactant free emulsion copolymerization of N-isopropylacrylamide (NIPAm) as the main monomer and 1-vinylimidazole, or, 4-vinylpyridine as the comonomer. 1, 4-dibromobutane and 1, 6-dibromohexane were used as the h...