Biomedical subjects

Fuke Wang

Publications and source records attributed to Fuke Wang.

5 recordsLinked to original sources

PubMed2006

Aggregation-mediated optical properties of pH-responsive anionic conjugated polyelectrolytes.

Conjugated polyelectrolyte copolymers containing 2,1,3-benzothiadiazole- (BT) and oligo(ethylene oxide)-substituted fluorene and phenylene units have been designed and synthesized. The phenylene pendent groups also have carboxylic acid functionalities, which allow probing the effect of pH on optical properties. The BT content in the backbone can be regulated at the synthesis stage. Dynamic light scattering studies show that polymers aggregate in water at low pH. Increased interchain contacts give rise to a lowering of the photoluminescence (PL) efficiency via self-quenching when the BT units are absent and increased levels of FRET from the phenylene-fluorene segments to BT. Furthermore, the PL efficiency of BT increases in the aggregated structures. Examination of solvent effects indicates that the increased BT efficiencies are likely due to decreased contact with water. The changes in PL efficiencies are reversible, showing that the aggregates are dynamic and not kinetically constrained.

Anions↗

PubMed2006

[Relationship between the central nervous system injury and the heterotopic ossification].

OBJECTIVE: To review the progress of the research on the relationship between the central nervous system injury and the heterotopic ossification. METHODS: The recent articles on the central nervous system injury and the heterotopic ossification were extensively reviewed, and the related clinical signs, symptoms, pathogenesis diagnosis, risk factors, prophylaxis, and treatment of the neurogenic heterotopic ossification were investigated. RESULTS: The possible mechanism for the neurogenic heterotopic ossification might involve the roles of the bone morphogenetic protein and the basic fibroblast growth factor, which were suggested as mediators in differentiation of the progenitor cells. Sonographic, serum creatine phosphokinase, and C-reactive protein were recommended as the useful screening tools for heterotopic ossification. Colchicine and rofecoxib could be used for the prophylaxis or treatment of heterotopic ossification. CONCLUSION: The research on the neurogenic heterotopic ossification has achieved a great development but further studies in this field are still required.

Humans↗

PubMed2005

Aggregation-driven growth of size-tunable organic nanoparticles using electronically altered conjugated polymers.

A novel class of monodisperse conjugated polymer nanoparticles have been readily prepared by the facile reprecipitation of poly{1,3-bis[2-(3-alkylthienyl)]azulene} or poly{1,3-bis[2-(3-alkoxythienyl)]azulene}. The multicomponent poly(bithiophene-alt-azulene) macromolecules were efficiently self-assembled into a wide range of size-tunable nanoparticles from a few tens to five hundred nanometers via the hydrophobic and pi-stacking effects in the mixed chloroform/methanol solutions. Electronically altered polymer structures with different alkyl or alkoxy substitutes exhibited variable self-assembling behaviors to precisely tune the size and the optical/electronic properties of nanoparticles. A strong size dependence of continuous bathochromic absorption and significant enhanced emission were observed with the increase of particle size. A linear relationship between the absorption or fluorescence intensities and the particle size was demonstrated as well, and this is very useful to probe the intermolecular interactions and the size evolutions of conjugated polymer nanoparticles. After the size-dependent optical and electronic properties are created, they can be further optimized to improve the performance of materials prior to the use in novel organic nanodevices in a cost-effective way.

Journal Article↗

PubMed2003

Post-coordination of multinuclear transitional metal clusters to azulene-based polymers: a novel strategy for tuning properties in pi-conjugated polymers.

Direct treatment of azulene-thiophene copolymers with Ru(3)(CO)(12) led to unique examples of coordination of a multinuclear transition metal cluster to conjugated polymers. The polymer-metal cluster formation could be confirmed by (1)H NMR spectroscopic studies, and the coordination mode could be deduced from the crystallographic structure of model compounds. The composition of ruthenium carbonyl cluster could be used as a governing factor to tune the electronic, optical, and morphological properties of the organometallic polymers. [structure: see text]

Journal Article↗

PubMed2003

The first fully characterized 1,3-polyazulene: high electrical conductivity resulting from cation radicals and polycations generated upon protonation.

[reaction: see text] 1,3-Polyazulene prepared by the chemical polymerization of 1,3-dibromoazulene with Ni(COD)(2) was aptly characterized by spectroscopic analysis. The azulene units remain intact in the isolated polymer. Protonation of 1,3-polyazulene by trifluoroacetic acid was found to exhibit high conductivity and paramagnetic properties via the formation of cation radicals and di- and polycations.

Journal Article↗