Qingdao UniversityShandong

Qingdao, China

Qingdao UniversityShandong

Qingdao, China

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Xue Z.-Z.,Qingdao UniversityShandong | Pan J.,Qingdao UniversityShandong | Li J.-H.,Qingdao UniversityShandong | Wang Z.-H.,Qingdao UniversityShandong | Wang G.-M.,Qingdao UniversityShandong
Journal of Molecular Structure | Year: 2017

Two new gallium phosphate/phosphite-oxalates hybrid solids, {[H2dmpip][Ga2(HPO4)2(PO4)(C2O4)0.5]·H2O} (1) and [H2apm][Ga2(H2PO3)2(HPO3)2(C2O4)] (2), where dmpip = 2,6-dimethyl-piperazine and apm = N-(3-aminopropyl)morpholine, have been synthesized and structurally characterized. Both of compounds 1 and 2 are formed by the connectivity of the Ga-based polyhedral, phosphite/phosphate groups as well as oxalate units. Compound 1 possesses a two-dimensional layer structure, in which the C2O4 units via an in-plane linkage connect two Ga center within the sheet. While in 2, the C2O4 units serve as bis-bidentates ligands bridging two GaO6 octahedra from two distinct gallium-phosphite chains to give rise to inorganic-organic hybrid layer with 8-membered rings. In these materials, the structure-directing amines reside in the interlayer region and interact with the layers by way of hydrogen-bonds. © 2017 Elsevier B.V.

Gui R.,Qingdao UniversityShandong | Jin H.,Qingdao UniversityShandong | Wang Z.,Qingdao UniversityShandong | Tan L.,Shanghai JiaoTong University
Coordination Chemistry Reviews | Year: 2017

During the past two decades, great effort has been dedicated to two-photon excited colloidal quantum dots (QDs) because of their unique optical properties and significant applications. Under two-photon excitation, colloidal semiconductor QDs and carbon-family QDs show the nonlinear two-photon absorption (TPA) that is essential to the applications of two-photon microscopy and fluorescence up-conversion. For the first time, this review systematically summarizes the optical properties and potential applications of two-photon excited colloidal QDs with different categories. The optical properties of two-photon excited colloidal QDs include the typical nonlinear optical behavior, TPA, two-photon excited fluorescence (TPEF), time-resolved TPEF and TPEF lifetimes. The applications of two-photon excited colloidal QDs are wholly covered, including the cellular and in vivo imaging, chem./bio-detection, photodynamic therapy, controlled drug release, photocatalysis, photoelectric conversion, etc. This review comments the recent advances in the vibrant topic of colloidal QDs, and also highlights the optical phenomenon, related mechanisms and important applications. Finally, the probable challenges and perspectives in the forthcoming development of two-photon excited colloidal QDs are addressed. © 2017 Elsevier B.V.

Dong L.,Qingdao UniversityShandong | Bie Z.,Weihai Wendeng Center HospitalShandong | Sun L.,Affiliated Hospital of Qingdao UniversityShandong | Pan X.,Affiliated Hospital of Qingdao UniversityShandong | Guo L.,Weihai Wendeng Center HospitalShandong
International Journal of Clinical and Experimental Medicine | Year: 2015

Background: Catheter ablation of atrial fibrillation (AF) became an effective therapy for patients with drug-refractory AF and Catheter ablation of Non-Paroxysmal AF for elderly remains a challenging task. The outcome of AF ablation in Elderly is not clear. Objective: The aim of the present study was to investigate the long-term outcomes of catheter ablation in patients with non-paroxysmal AF and the predictors of AF termination, and the clinical outcomes associated with termination and non-termination. Methods: A total of 95 non-paroxysmal AF patients who received a stepwise catheter ablation were enrolled. There were 46 patients (48.4%) suffering from recurrences (37 patients with AF and 9 patients with atrial flutter/atrial tachycardia) after single procedure during a median follow-up period of 25.6 months. AF termination by ablation was achieved in 73 of the 95 patients Results: The AF non-termination after procedure and CHA2DS2-VASc scores ≥3 were significant predictors of recurrences in the multivariable analysis. In AF termination group: for a CHA2DS2-VASc scores of 0, 1-2, and ≥3 the recurrence rates were 29% (8/28), 39% (12/31) and 64% (9/14) respectively. Similarly, In AF non-termination group: for a CHA2DS2-VASc scores of 0, 1-2, and ≥3 the recurrence rates were 63% (5/8), 75% (6/8), and 100% (6/6), respectively. Of the patients with CHA2DS2-VASc scores of ≥3 in AF non-termination group all experienced recurrences within 2 year after the single procedure. Conclusions: The catheter ablation may be effective in eliminating part of non-paroxysmal AF for elderly. In addition, the present study demonstrated that CHA2DS2-VASc scores and non-termination after procedure were useful predictors of AF recurrence. © 2015, E-Century Publishing Corporation. All rights reserved.

Zhu S.,Qingdao UniversityShandong | Tian M.,Qingdao UniversityShandong
Materials Letters | Year: 2015

Abstract PET flame-retardant fabric with the presence of sensitizer trimethylolpropane triacrylate has been prepared by supercritical CO2 progressing method and then irradiated by electron irradiation. Irradiation changed the burning behavior of the PET flame-retardant fabric which had no dripping but burned up with the flaming and char forming. In order to explain the irradiation effect, XPS is used to investigate the change of the chemical bonds. The XPS data analysis indicated that during irradiation, the effective flame-retarded group C-O-P was broken, so its flame retardance disappeared at time of combustion, while there was no melt drip because the crosslinking was introduced by irradiation. © 2015 Elsevier B.V.

Qu L.,Qingdao UniversityShandong | Zhu S.,Qingdao UniversityShandong | Tian M.,Qingdao UniversityShandong | Guo X.,Qingdao UniversityShandong | And 4 more authors.
Indian Journal of Fibre and Textile Research | Year: 2015

The microwave-assisted non-thermal degumming of hemp fibre has been studied and then compared with the water bath heating under different time and temperature conditions. The results show that the residual gum content of the lean hemp using microwave-assisted heating method is lower than that obtained using water bath heating. The residual gum content gap between the two degumming processes increases first and then decreases as the heating time and temperature are increased. This proves the existence of non-thermal effects in microwave heating process besides the thermal effects in water bath heating. In addition, the structures of the lean hemp fibres obtained from these two methods are also studied by scanning electron microscopy and fourier transform infrared spectroscopy. © 2015, National Institute of Science Communication and Information Resources (NISCAIR). All right reserved.

Wang Z.,Qingdao UniversityShandong | Zhao C.,Qingdao UniversityShandong | Gui R.,Qingdao UniversityShandong | Jin H.,Qingdao UniversityShandong | And 3 more authors.
Coordination Chemistry Reviews | Year: 2016

Graphene (Gr) has a large specific surface area, high conductivity, high chemical stability, and mechanical strength. These desirable properties greatly facilitate the application of Gr in many fields, especially physics, chemistry, and materials science. To extend the applications of Gr, nanocomposites of Gr conjugated with metals, polymers, and semiconductors have been prepared in recent years, which have been applied extensively in significant areas such as energy storage, nanoelectronic devices, and sensors. During the latest decade, transition metal dichalcogenides (TMDs)/Gr nanocomposites have attracted increasing attention and developed rapidly as a hot research area because of their excellent properties and promising applications. This review systematically summarizes the synthetic methods and potential applications of TMDs/Gr nanocomposites. First, the structures and properties of TMDs/Gr nanocomposites are introduced. Second, synthetic methods for TMDs/Gr nanocomposites with different compositions and structures are summarized, including hydrothermal, solvothermal, chemical vapor deposition, microwave-assisted, and dry/wet transfer methods. Third, the potential applications of different TMDs/Gr nanocomposites in important fields are highlighted in electronic and optical devices, such as rechargeable batteries, hydrogen evolution reactions, solar photovoltaic cells, supercapacitors, electronic devices, and sensors. Finally, this review considers the advantages and disadvantages of different synthetic methods as well as the applications of TMDs/Gr nanocomposites. Possible future research areas related to the synthetic methods and applications of TMDs/Gr nanocomposites are suggested. © 2016 Elsevier B.V.

Wang G.-M.,Qingdao UniversityShandong | Li J.-H.,Qingdao UniversityShandong | Wei L.,Qingdao UniversityShandong | Han S.-D.,Qingdao UniversityShandong | And 2 more authors.
CrystEngComm | Year: 2015

A novel open-framework beryllium phosphite, [H4tren][Be6(HPO3)8]·(H2O)3 (1, tren = tris(2-aminoethyl)amine), was synthesized under solvothermal conditions. Its structure features a 3D interrupted network with a low density (1.594 g cm-3), and 1 represents the first example of a beryllium phosphite material with extra-large 18-ring channels. © The Royal Society of Chemistry 2015.

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