Time filter

Source Type

Chen Y.,Jilin University | Chen Y.,Changchun Obstetrics and Gynecology Hospital | Li F.-F.,State Key Laboratory of Inorganic Synthesis and Preparative Chemistry | Li C.-G.,State Key Laboratory of Inorganic Synthesis and Preparative Chemistry | And 2 more authors.
Gaodeng Xuexiao Huaxue Xuebao/Chemical Journal of Chinese Universities | Year: 2013

The up-conversion luminescent material for optically written display, NaGdF4:Yb3+, Er3+ up-conversion nanoparticies(UCNPs) were prepared under microwave irradiation. The particle size was about 65 nm and the samples exhibited green(550 nm) fluorescence excited by a 980 nm diode laser. The UCNPs@SiO2-NH2 nanocomposites, the size of which was 70 nm, were prepared and conjugated with polyclonal antibidy. Then, the ability of polyclonal antibody fluorescent probes was detected to recognize the expression of tissue inhibitor of metalloproteinases-4(TIMP-4) in the endometrial gland cells by immunohistochemistry. The results show that the as-prepared UCNPs have uniform shape and size distribution. The UCNPs@SiO2-NH2 nanocomposites offer some distinct advantages, such as good distribution and water-solubility, strong and stable upcoversion fluorscence as well as significant auto-fluorescence from biological tissues resting in low signal to background ratio, and are potentially to apply to detect the expression of protein in tissues at 980 nm excitation.

Pei C.,State Key Laboratory of Inorganic Synthesis and Preparative Chemistry | Ben T.,Jilin University | Guo H.,State Key Laboratory of Inorganic Synthesis and Preparative Chemistry | Xu J.,CAS Wuhan Institute of Physics and Mathematics | And 4 more authors.
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences | Year: 2013

A novel electroactive porous aromatic framework (JUC-Z4-Cl) was designed and synthesized via Yamamoto-typeUllmann cross-coupling reaction with the monomer tris(4-chlorophenyl)phosphine. By simple redox chemical reactions, stable, reductive, porous polytri(p-phenyl)phosphine (JUC-Z4) and polytri(p-phenyl)phosphine oxide (JUC-Z5) could be obtained as off-white powders. The structures of JUCZ4 and JUC-Z5 were confirmed using magic-angle spinning nuclear magnetic resonance spectroscopy, Fourier transform infrared spectroscopy, etc. The microporous architectures exhibit high stability (471?C for JUC-Z4 and 484°C for JUC-Z5) and large surface area (793 and 648m 2 g-1 for JUC-Z4 and JUC-Z5, respectively). JUC-Z4 also exhibits efficient recognition ability of greenhouse gases from dry air. ©2013 The Author(s) Published by the Royal Society.

Guo Y.,Northeast Normal University | Wang J.,Northeast Normal University | Gao N.,State Key Laboratory of Inorganic Synthesis and Preparative Chemistry | Qi M.,Northeast Normal University | And 3 more authors.
International Journal of Molecular Sciences | Year: 2013

The relationship between synthetic factors and the resulting structures is critical for rational synthesis of zeolites and related microporous materials. In this paper, we develop a new feature selection method for synthetic factor analysis of (6,12)-ring-containing microporous aluminophosphates (AlPOs). The proposed method is based on a maximum weight and minimum redundancy criterion. With the proposed method, we can select the feature subset in which the features are most relevant to the synthetic structure while the redundancy among these selected features is minimal. Based on the database of AlPO synthesis, we use (6,12)-ring-containing AlPOs as the target class and incorporate 21 synthetic factors including gel composition, solvent and organic template to predict the formation of (6,12)-ring-containing microporous aluminophosphates (AlPOs). From these 21 features, 12 selected features are deemed as the optimized features to distinguish (6,12)-ring-containing AlPOs from other AlPOs without such rings. The prediction model achieves a classification accuracy rate of 91.12% using the optimal feature subset. Comprehensive experiments demonstrate the effectiveness of the proposed algorithm, and deep analysis is given for the synthetic factors selected by the proposed method. © 2013 by the authors; licensee MDPI, Basel, Switzerland.

Guo Y.,Northeast Normal University | Tian Z.,CAS Changchun Institute of Optics and Fine Mechanics and Physics | Gao N.,State Key Laboratory of Inorganic Synthesis and Preparative Chemistry | Gao N.,Institute of Modern Agriculture | And 2 more authors.
Microporous and Mesoporous Materials | Year: 2016

Open-framework aluminophosphates (AlPOs) is an important family of porous crystal materials. But the synthetic chemistry of this kind of materials is very complicated, and the synthesis mechanism has not been clearly understood yet. In this paper, we propose a Hierarchical Feature Selection Model (HFSM) composed of two layers to analyze the rational synthetic parameters for the subclass of microporous aluminophosphates (AlPOs) containing (6,8)-rings. In the first layer, we select a feature subset that could separate the (6,8)-ring-containing microporous AlPOs from other AlPOs. In the second layer, we further analyze which of these selected features are critical for the formation of each special subclass in (6,8)-ring-containing microporous AlPOs. With the optimal feature subset selected by the proposed model, we can obtain the highest accuracy rates as 94.28%, 94.03%, 91.27% and 92.20% for the classification of AEN, AWO, CHA and ERI, respectively. Extensive analysis is presented for the synthetic parameters selected by the hierarchical model, which could provide a useful guidance to the rational synthesis of such materials. © 2016 Elsevier Inc. All rights reserved.

Loading State Key Laboratory of Inorganic Synthesis and Preparative Chemistry collaborators
Loading State Key Laboratory of Inorganic Synthesis and Preparative Chemistry collaborators