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A new donor-acceptor polymer (PBDTT-DFTQ) based on two-dimensional conjugated alkylthienyl substituted benzo[1,2-b:4,5-b′]dithiophene and two fluorine substituted quinoxaline derivatives was synthesized and applied as donor materials for bulk heterojunction solar cells. Thermal stability, absorption properties, energy levels and photovoltaic properties of the polymer were intensively investigated...
A novel linear polyester with acid-labile β-thiopropionate groups was synthesized via the direct lipase-catalyzed polycondensation of methyl 3-((2-hydroxyethyl)thio)propanoate (MHETP) using immobilized lipase B from Candida antarctica (CALB). The influences of reaction conditions such as polymerization temperature and time on the molecular weight of the poly(β-thioether ester) (PTE) were studied....
Orthogonal multi-phase strategy has been applied to generate a novel type of thermoplastic elastomeric block copolymer which was obtained via anionic polymerization. Functional terpyridine groups which can potentially form metallo-supramolecular complexes with a variety of metal ions has been introduced to the polystyrene-b-polyisoprene (PS-PI) living chain ends through the termination reaction in...
Rational design and successful synthesis of a novel double side-chain liquid crystalline (SCLC) diblock copolymer bearing a common flexible polyether backbone were achieved via sequential anionic polymerization. The distinct differences in transition temperatures as well as phase ranges of the constituting blocks counterparts merited the full exploration of complex phase structures of the diblock...
Side-chain liquid crystalline (SCLC) polyethers with different spacers are successfully synthesized via anionic polymerization for the first time. The molecular weights of the polymers can range up to ∼53 kg/mol with M w /M n <1.1. The precise chemical structures including end groups have been characterized by employing Matrix-Assisted Laser Desorption/Ionization-Time of Flight...
We report the design and synthesis of a thermally-responsive dumbbell-shaped polymer based on one β-cyclodextrin (β-CD)-terminated polyethylene glycol (PEG) segment and several poly(N-isopropylacrylamide) (PNIPAM) segments through combining click reaction with atom transfer radical polymerization. Thermally-triggered self-assembly and molecular inclusion behaviors of the polymer were investigated...
Large complex micelles based on H-shaped terpolymers (poly(ethylene glycol))(poly(N,N-dimethylaminoethyl methacrylate))-polytetrahydrofuran-(poly(N,N-dimethylaminoethyl methacrylate)) (poly(ethylene glycol)) ((PEG)(PDMA)-PTHF-(PDMA)(PEG)), with proper block ratio, are obtained through ultrasonic vibration. However, similar micellar morphology is not found using other traditional methods, such as evaporation...
From the molecular designing point of view, (p-amino)phenylhydroquinone (APH) and (3, 5-dimethoxy)phenylhydroquinone (DMPH) were prepared in a two-step synthesis. Polyetheretherketone with a large number of amino groups (APEEK) and polyethersulfone with quantities of hydroxyl side groups (HPES) were successfully synthesized from these bisphenol monomers. The functionalized polyarylethers were then...
A facile and general one-step approach is presented to synthesize hollow spheres with varied composition by an aerosol-assisted solvent evaporation process. The monomer of ethyl-2-cyanoacrylatemide contained in the aerosol droplets can form an outer shell by a fast polymerization around the droplets. Materials inside the droplets further grow inwardly against onto the interior surface of the first...
Over the past decade, the synthesis and application of various composite colloids and their ordered patterning have received considerable attention. We summarize the recent progress in morphology and composition control of various spherical, non-spherical composite colloids and their patterning. Hollow colloids, ellipsoidal colloids and their patterning are highlighted for their unique properties...
In order to investigate the electro-optical property variations among the target topology-varied polymers with diverse molecular architectures, a series of polymers (P0–P2), having sterically hindered side chains, based on fluorene and pyridine derivatives were successfully synthesized via simple synthetic route and fully characterized via various spectroscopic methods and cyclic voltammetry measurements...
We have demonstrated a general and facile method to synthesize composite hollow spheres by IPN-assisted transcription of polymeric hollow spheres. Starting from a parent PS hollow sphere, IPN polymer composite hollow spheres have been synthesized by a swell polymerization within the shell. The shell thickness and the cavity size are tunable by altering the feeding amount of the monomers. A variety...
Two kinds of blue light-emitting hyperbranched crosslinkable polyfluorene P1 and P2 with different contents of branch unit were synthesized via the palladium-catalyzed Suzuki coupling reaction, and the linear crosslinkable polyfluorene P0 was also prepared for comparison. The molecular weight and thermal behavior of the polymers were measured by GPC, DSC and TGA. Compared with uncrosslinked P0, P1...
The 3D structure of the AmiF formamidase of Helicobacter pylori (denoted as AmiF(fhp)) is built by homology modeling. The docking studies show that AmiF(fhp) has restricted substrate specificity, as it only hydrolyzes formamide. In order to reveal the reaction mechanism and the catalytic role for Cys166, Lys133 and Asp168 in AmiF(fhp), three quantum mechanics' models are constructed based on the 3D...
With the aid of the automated molecular docking, the inhibition effect of 20(S)-Protopanaxadiol (PPD) and Ginsenoside Rh2 for CYP2C9 and CYP3A4, respectively, were studied by InsightII/Affinity program and the docking complexes were analyzed by InsightII/Ludi program. The results indicate that PPD is a competitive inhibitor for CYP2C9 but a poor inhibitor for CYP3A4, Rh2 is a noncompetitive inhibitor...
A series of hyperbranched triazine-containing polyfluorenes were synthesized by an “A 2 +A′ 2 +B 3 ” approach based on Suzuki polycodensation. The polymers showed pure blue emission and the maximum emissions red-shifted in polar solvents and in solid film. By introducing triazine into polyfluorene, the electron injection and transport properties were improved and green emission...
In order to understand the mechanisms of substrate specificity and the interaction between bergaptol and bergaptol O-methyltransferase (BMT), a 3D model of BMT is generated based on the crystal structure of caffeic acid 3-O-methyltransferase (COMT EC 2.1.1.68, PDB code 1KYZ) by using the InsightII/Homology module. With the aid of the molecular mechanics and molecular dynamics methods, the final refined...
Jasmonic acid (JA) is a plant volatile that acts as an important cellular regulator mediating diverse developmental processes and defense responses. Not only the attacked plant but also neighboring plants are affected, becoming more attractive to herbivore predators and less susceptible to invaders. The three-dimensional (3D) model of methyl jasmonate esterase (MJE), which is only responsible for...
In this paper the well-known Chauchy's inequality is applied to prediction of critical length of the straight jet in electrospinning. A critical relationship between radius r of jet and the axial distance z from nozzle is obtained for the straight jet. Critical length number and critical radius number are defined, which might be found potential applications in experiment and apparatus design.
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