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Zhang R.,Shandong University | Zhang R.,Key Laboratory of Special Functional Aggregated Materials | Li W.,Shandong University | Li L.,Shandong University | And 3 more authors.
Thin Solid Films

Microstructures bridge the molecular and the macroscopic scales. Disk-patterned microstructures obtained from microcapsules in this work are assembled through layer-by-layer which allowed depositing the natural polysaccharides chitosan (CS) and sodium alginate (SA) on porous CaCO 3 microparticles. Besides CS and SA assembled outside CaCO 3 microparticles, some CS and SA were also encapsulated by permeation in the pores of CaCO 3. During the dissolution of CaCO 3, the Ca 2 + cations from decomposed CaCO 3 were found to interact with alginate (AL) anions and to form Ca 2 +-AL scaffolds. The adhesion arising from the OH groups in polysaccharides to solid surfaces was attributed to the disk-patterned microstructures. The calcium content (2.290 × 10 - 10 mg) in each (CS/SA) 4 microstructure amounts to about 1% of the total mass of the CaCO 3 core. This work thus demonstrates the interaction between the decomposed core elements and the polysaccharides existing both inside and outside the porous cores. Such microstructures containing both Ca 2 + and natural polysaccharides have potential applications in biological and medical systems. © 2012 Elsevier B.V. All rights reserved. Source

Chen G.W.,Shandong University | Chen G.W.,Key Laboratory of Special Functional Aggregated Materials | Zhang C.,Shandong University | Li W.J.,Shandong University | And 2 more authors.
Chinese Chemical Letters

A new β-cyclodextrin modified hyperbranched carbosilane stationary phase for gas chromatography was synthesized by substituting the OH groups of β-cyclodextrin with hyperbranched carbosilane and was coated on the inner wall of fused silica capillary column for gas chromatography. The chromatographic behaviors of the stationary phase were studied. The initial testing results showed that it possessed good separation abilities for several kinds of mixtures, such as benzenes, acrylates, ketones and alkylchlorides. © 2012 Chuan Jian Zhou. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved. Source

Diao S.,Key Laboratory of Special Functional Aggregated Materials | Diao S.,Shandong University | Zhang S.,Key Laboratory of Special Functional Aggregated Materials | Zhang S.,Shandong University | And 8 more authors.
Journal of Applied Polymer Science

Two kinds of treated fumed silica were prepared by treatment with either tetraphenylphenyltriethoxysilane (TPHTS) or both tetraphenylphenyltriethoxysilane and hexamethyldisilazane (TPHMTS), and were used as reinforcing filler for silicone rubber. The resistance to irradiation of the silicone rubber obtained was investigated by gamma ray of dose 500 kGy in air. The mechanical properties and the average molecular weight between crosslinking points (Mc) of the silicone rubber were determined before and after irradiation. The results show that the fumed silica treated by tetraphenylphenyltriethoxysilane (TPHPHS) can effectively improve the radiation resistance of silicone rubber while the fumed silica treated by both tetraphenylphenyltriethoxysilane and hexamethyldisilazane (MMN) cannot only effectively improve the radiation resistance of silicone rubber but also has excellent reinforcing effect on silicone rubber. © 2010 Wiley Periodicals, Inc. Source

Wang Y.,Shandong University | Wang Y.,CAS Technical Institute of Physics and Chemistry | Yin Z.,Qingdao University of Science and Technology | Xie Z.,CAS Technical Institute of Physics and Chemistry | And 5 more authors.
ACS Applied Materials and Interfaces

In this work, aminopropylmethylpolysiloxane (AMS) functionalized luminescent carbon dots (AMS-CDs) were prepared via a one-step solvothermal method. AMS-CDs could be self- or co-cross-linking with AMS to form 3D flexible transparent silicone rubbers (SRs) where CDs acted as cross-linking points, so the loading fraction of AMS-CDs could be adjusted from 10 to 100 wt %, thus modulating fluorescence properties and flexibility of silicone rubbers. Because of the self-curing property and high thermal stability, AMS-CDs were also studied in white LEDs (WLEDs), serving as a color conversion and encapsulation layer of GaN based blue LEDs simultaneously that would avoid the traditional problem of poor compatibility between emitting and packaging materials. And the color coordinate of AMS-CDs based WLEDs (0.33, 0.28) was very close to the pure white light. In addition, the obtained CDs cross-linked SRs had good transparency (T > 80%) at 510-1400 nm and high refractive indexes (1.33-1.54) that could meet the need of commercial packaging materials and optical application. AMS-CDs were also promising to be used in the UV LEDs based WLEDs according to their wide wavelength emission and flexible optoelectronic device. © 2016 American Chemical Society. Source

Chen D.-M.,Key Laboratory of Special Functional Aggregated Materials | Wang S.,Key Laboratory of Special Functional Aggregated Materials | Li H.-X.,CAS Shanghai Institute of Organic Chemistry | Zhu X.-Z.,CAS Beijing National Laboratory for Molecular | Zhao C.-H.,Key Laboratory of Special Functional Aggregated Materials
Inorganic Chemistry

The efficient synthesis has been disclosed to achieve a new class of ladder-type molecules, B,S-bridged p-terphenyls (BS-TPs). Their properties were fully characterized by UV-vis and fluorescence spectroscopy in both solution and solid state, time-resolved fluorescence spectroscopy, DFT theoretical calculations, and cyclic voltammetry. A detailed comparison between anti-BS-TP and its analogue B,N-bridged p-terphenyl (BN-TP) was made to elucidate the effect of displacement of bridging N with S atom on the properties. The introduction of S rather than N atom as bridging atom leads to increased fluorescence efficiency in both solution and solid state as well as enhanced reduction stability. And thus this new class of ladder-type molecules are highly emissive in both solution and solid state and display reversible reduction wave in cyclic voltammograms, denoting their promising potentials as electron-transporting solid-state emitters. In addition, this new class of molecules are capable of detecting F- and Hg2+ with different fluorescence responses, owing to the high Lewis acidity of the B center to coordinate with F- anions and the great mercury-philicity of the S center to complex with Hg2+ cations. © 2014 American Chemical Society. Source

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