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Triangle Type Trinuclear Copper Complexes with Triplet-excitation Luminescent Property, an Ab Initio Study

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Chinese Journal of Structural Chemistry 2006年第5期25卷 517-522页

作者： MANG Chao-yong zhang ming-Xin WU Ke-Chen State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter The Chinese Academy of SciencesFuzhoFujian350002China

The luminescent mechanism and properties of a triangular Cu（I） complex, （CuPz）3. have been studied by CIS method. The ground and lowest triplet excitation state geometries were optimized at MP2/SBKJC and CIS/SBKJC levels, respectively. A remarkable geometry distortion of the lowest triplet state was found and believed to cause the emission spectra to red shift.

关键词： luminescence triplet excitation phosphorescence copper complex

Analytical study on water hammer pressure in pressurized conduits with a throttled surge chamber for slow closure

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Water Science and Engineering 2010年第2期3卷 174-189页

作者： yong-liang zhang ming-fei MIAO Ji-ming MA State Key Laboratory of Hydroscience and Hydraulic Engineering Department of Hydraulic Engineering Tsinghua University Beijing 100084 P. R. China

This paper presents an analytical investigation of water hammer in a hydraulic pressurized pipe system with a throttled surge chamber located at the junction between a tunnel and a penstock, and a valve positioned at the downstream end of the penstock. Analytical formulas of maximum water hammer pressures at the downstream end of the tunnel and the valve were derived for a system subjected to linear and slow valve closure. The analytical results were then compared with numerical ones obtained using the method of characteristics. There is agreement between them. The formulas can be applied to estimating water hammer pressure at the valve and transmission of water hammer pressure through the surge chamber at the junction for a hydraulic pipe system with a surge chamber.

关键词： throttled surge chamber water hammer orifice analytical formula

Long-term comparison of full-bed deep anterior lamellar keratoplasty and penetrating keratoplasty in treating keratoconus

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2013年第5期14卷 438-450页

作者： yong-ming zhang Shuang-qing WU Yu-feng YAO Department of Ophthalmology Sir Run Run Shaw HospitalSchool of MedicineZhejiang University Sir Run Run Shaw Institute of Clinical Medicine of Zhejiang University

Objective: To compare postoperative outcomes of full-bed deep anterior lamellar keratoplasty (DALK) with penetrating keratoplasty (PK) in treating keratoconus. Methods: Seventy-five eyes of 64 patients who received full-bed DALK and 52 eyes of 51 patients who received PK between June 2000 and August 2010 were included in this retrospective study. Full-bed DALK was performed using Yao's hooking-detaching technique. PK was performed using a standard technique. Intraoperative and postoperative complications, visual acuity, rejection, graft survival, endothelial cell density, corneal sensation recovery, and re-innervation were compared between the two groups. Results: A best correct visual acuity of 0.5 or better was achieved in 90.7% of eyes after full-bed DALK and in 92.3% of eyes after PK (P=0.75). By the fifth postoperative year, graft endothelial cell loss reached 34.6% in the PK group vs. 13.9% in the full-bed DALK group (P0.05). Intraoperative microperforation occurred in seven out of 75 (9.3%) eyes with a temporally postoperative double anterior chamber in two eyes in the full-bed DALK group. Postoperative complications in the PK vs. the full-bed DALK groups respectively were: rejection (7.7% vs. 0%, P=0.015), high intraocular pressure (IOP) (46.2% vs. 1.3%, P<0.001), secondary glaucoma (9.6% vs. 0%, P=0.006), complicated cataract (19.2% vs. 0%, P<0.001), and wound dehiscence (9.6% vs. 0%, P=0.006). Conclusions: Both full-bed DALK and PK can offer long-term satisfactory visual outcomes for keratoconus. Graft rejection, secondary glaucoma, complicated cataracts, and constant endothelial cell loss were observed in eyes only after PK.

关键词： Full-bed deep anterior lamellar keratoplasty Penetrating keratoplasty Keratoconus Forceps hooking Viscoelastic detaching

Characterization of the copper-containing amine oxidase from Trifolium pratense seedlings

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Nuclear Science and Techniques 2016年第3期27卷 138-144页

作者： yong-ming zhang Guo-Long Li Rui-Bo ZhongYu-Xing Ma Pei Gong Feng zhang College of Life Science and Technology Inner Mongolia Normal UniversityHohhot 010022China Sugar beet Physiological Institute Inner Mongolia Agricultural UniversityHohhot 010019China Agricultrual Nanocenter School of Life SciencesInner Mongolia Agricultural UniversityHohhot 010018China

We studied the kinetic characterizations of the Trifolium pratense seedlings copper-containing amine oxidase(TPAO) by using various amine-containing *** catalyzing rate for all of amine-containing substrates can be ordered as diamines > polyamines > aromatic monoamines,and it shows an apparent trend in each category of substrates such as the longer the carbon chain,the lower the V_(max) is,so does the V_(max)/K_m values but is opposite for the K_m value of *** distinct differences between the kinetic parameters for different amine-containing substrates indicated that the rate-determining step of the catalytic reaction strongly depends on the substrate's chemical *** is concluded that both pH and ionic strength can affect the catalytic activity of TPAO via influencing the coulomb interaction-mediated enzyme-substrate docking processes,which can be attributed to the potential of charged groups from both substrates and the activity sites of TPAO by the regulation of ionic strength.

关键词：胺氧化酶含铜幼苗红三叶表征库仑相互作用催化速率离子强度

Aggregation-induced phosphorescence and mechanochromic luminescence of a tetraphenylethene-based gold(Ⅰ) isocyanide complex

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Chinese Chemical Letters 2017年第6期28卷 1300-1305页

作者： Wen-Bo Li Wei-Jian Luo Kai-Xuan Li Wang-zhang Yuan yong-ming zhang Shanghai Key Lab of Electrical Insulation and Thermal Aging Shanghai Electrochemical Energy Devices Research Center School of Chemistry and Chemical Engineering Shanghai Jiao Tong University Shanghai 200240 China

In this study,a new twisting gold（Ⅰ） isocyanide complex based on tetraphenylethene（TPE）,*** designed and *** exhibits aggregation induced phosphorescence（AIP） characteristics,owing to the incorporation of Au moiety and conformation rigidification in the aggregated ***,the emission color of the crystalline solid of TPE-NC-Au changes from blue（454 nm） to green（500 nm） in response to mechanical grinding,due to the combined effects of conformation planarization,enhanced π…π stacking,as well as the emergence of aurophilic interactions in the ground amorphous ***,the emission color can be restored upon solvent fuming,associating with the reconstruction of crystalline *** AIP and switchable mechanochromism of TPE-NC-Au make it suitable for potential applications in bioimaging,sensing,and optoelectronic devices.

关键词： Aggregation-induced phosphorescence Mechanochromism Aurophilic interaction Gold(Ⅰ) isocyanide complex

Preparation and upconversion luminescence of YVO_4:Er^(3+),Yb^(3+)

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International Journal of Minerals,Metallurgy and Materials 2010年第2期17卷 225-228页

作者： yong-ming zhang Yan-hong Li Peng Li Guang-yan Hong Ying-ning Yu School of Materials Science and Engineering Shenyang Institute of Chemical Technology Shenyang 110142 China Key Laboratory of Rare Earth Chemistry and Physics Chinese Academy of Sciences Changchun 130022 China

YVO4：Er^3＋,Yb^3＋ with varying Yb^3＋ concentrations were prepared by a precipitation *** results of X-ray diffraction （XRD） show that all the samples have a tetragonal zircon structure; the calculated average crystallite sizes are in the range of 14-22 *** lattice constants and cell volume of the samples decrease slightly with the increase in Yb^3＋ *** upconversion luminescence spectra of all the samples were studied under 980 nm laser *** strong green emission is observed,which is attributed to the 2^H11/2→4I15/2 and 4^S3/2→4^I15/2 transitions of Er^3＋,and the red emission peaks in 650-675 nm can be *** emission intensity for the sample depends on the Yb^3＋*** results reveal that the upconversion processes of YVO4：Er^3＋,Yb^3＋ are related to the structure and the doping Yb^3＋ concentration of the sample.

关键词： yttrium vanadate rare earth doped materials precipitation method upconversion luminescence

Unraveling the Effect of Solvent Additive and Fullerene Component on Morphological Control in Organic Solar Cells

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Chinese Journal of Polymer Science 2022年第12期40卷 1604-1612,I0008页

作者： Lei Zhu Quan-Zeng zhang Hong Ding ming zhang Xiao-Nan Xue Wen-Kai Zhong Zi-Chun Zhou Jin-Qiu Xu Wei Feng Ye-Cheng Zou yong-ming zhang Feng Liu Frontiers Science Center for Transformative Molecules In-situ Center for Physical Scienceand Center of Hydrogen ScienceSchool of Chemistry and Chemical EngineeringShanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Fluorinated Functional Membrane Materials and Dongyue Future Hydrogen Energy Materials Company Zibo 256401China

The manipulation of the morphology of the active layers is crucial for improving the performance of organic photovoltaic(OPV)devices. In particular, the development of non-fullerene acceptors(NFAs) has led to a large number of new materials with more complex interactions. Therefore, the investigation on the morphology control mechanism is the key aspect in providing guidance for material design and device optimization. In this study, the film morphology optimization using 1,8-diiodooctane(DIO) additive and a ternary fullerene acceptor strategy have been carried out based on the PCE10:ITIC blends. It is seen that suitable amount of DIO helps to increase the crystallization of the blended thin film. However, excessive DIO elevates the crystallization-induced phase separation and the domain size can exceed the exciton diffusion length, leading to efficiency drop. The addition of fullerene acceptor can improve the carrier transport of the blends, and its presence could retard the excessive phase separation induced by DIO additive. Under the joint optimization of the solvent additive and PCBM acceptor,the film morphology achieves a balance between crystallization and phase separation scales, the exciton diffusion and carrier transport are also optimized, and the short-circuit current(JSC) and fill factor(FF) of the device can be improved significantly.

关键词： Organic solar cells Morphology Solvent additive Crystallization-induced phase separation

VISCOSITY EFFECTS ON THE BEHAVIOR OF A RISING BUBBLE

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Journal of Hydrodynamics 2010年第1期22卷 81-89页

作者： WANG Han zhang Zhen-yu YANG yong-ming zhang Hui-sheng Department of Mechanics and Engineering Science Fudan University Shanghai 200433 China Department of Mathematics Shanghai University of Finance and Economics Shanghai 200433 China

In the incompressible fluid flow regime, without taking consideration of surface tension effects, the viscosity effects on the behavior of an initially spherical buoyancy-driven bubble rising in an infinite and initially stationary liquid are investigated numerically by the Volume Of Fluid （VOF） method. The ratio of the gas density to the liquid density is taken as 0.001, and the gas viscosity to the liquid viscosity is 0.01, which is close to the case of an air bubble rising in water. It is found by numerical experiments that there exist two critical Reynolds numbers Re1 and Re2 , which are in between 30 and 50 and in between 10 and 20, respectively. As Re 〉 Re1 the bubble will have the transition to toroidal form, and the toroidal bubble will break down into two toroidal bubbles. In this case viscosity will damp the development of the liquid jet and delay the formation of the toroidal bubble. As Re〈Re1 the transition will not happen. As Re2 〈 Re 〈 Re1, the bubble will split from its rim into a toroidal bubble and a spherical cap-like bubble, and as Re〈Re2 the splitting will not occur and the bubble can finally reach a stationary shape. With the decrease of the Reynolds number, the stationary shape changes from spherical-cap bubble with skirt to dimpled peach-like bubble. Before the bubble reaches its stationary shape the vortex structure in the flow field varies with time. The vortex structure corresponding to bubble stationary shape varies with the Reynolds number. It is also found that there exists another critical Reynolds number Re^＊ which is in between Re1 and Re2 , and as Re 〈 Re^＊, after the bubble rises in an accelerating manner for a moment, it will rise with an almost constant speed, and the speed increases with increasing Reynolds number. As Re 〉 Re^＊, it will not rise with a constant speed. The mechanism of the above phenomena has been analyzed theoretically and numerically.

关键词： rising bubble viscosity effects buoyancy force Volume Of Fluid (VOF) method

SURFACE TENSION EFFECTS ON THE BEHAVIOR OF TWO RISING BUBBLES

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Journal of Hydrodynamics 2011年第2期23卷 135-144页

作者： WANG Han zhang Zhen-yu YANG yong-ming zhang Hui-sheng State Nuclear Power Technology Corporation Research and Development Centre SNPTRD Beijing 100190 China Department of Mathematics Shanghai University of Finance and Economics Shanghai 200433 China Department of Mechanics and Engineering Science Fudan University Shanghai 200433 China

In the inviscid and incompressible fluid flow regime, surface tension effects on the behavior of two initially spherical bubbles with same size rising axisymmetrically in an infinite and initially stationary liquid are investigated numerically with the VOF method. The numerical experiments are performed for two bubbles with two different bubble distances. The ratio of gas density to liquid density is 0.001, which is close to the case of air bubbles rising in water. In the case of Dis = 2.5, where Dis is defined as the ratio of the distance between the bubble centroids to the radius of the bubble, it is found from numerical experiments that there exist four critical Weber numbers We1 , We2 , We3 and We4 , which are in between 10 and 100, 3 and 4, 1.5 and 1.8, and 0.2 and 0.3, respectively. In the case of Dis = 2.3, similar phenomena also appear but the corresponding four critical Weber numbers are lower than those in the case of Dis = 2.5. The mechanism of the above phenomena is analyzed theoretically and numerically.

关键词： two bubbles buoyancy surface tension VOF method