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Chiral thermally activated delayed fluorescence materials for circularly polarized organic light-emitting diodes

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Science China Chemistry 2024年第4期67卷 1097-1116页

作者： Li Yuan Yi-Pin Zhang You-xuan zheng State Key Laboratory of Coordination Chemistry Collaborative Innovation Center of Advanced MicrostructuresJiangsu Key Laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China

Chirality is an important natural characteristic of organic molecules,and chiral organic molecules have shown extensive application in areas such as pharmaceutical development and material *** from the ability to achieve circularly polarized luminescence(CPL),chiral luminescent materials have shown potential applications in anti-glare display,optical communication and,3D display,*** to the ability to harvest both singlet and triplet excitons by a fast reverse intersystem crossing process without involving noble metals,chiral thermally activated delayed fluorescence(TADF)materials with point chirality,axial chirality,planar chirality and helical chirality are regarded as the state-of-the-art materials for circularly polarized organic light-emitting diodes(CP-OLEDs).In recent years,the chiral TADF materials and CP-OLEDs have rapidly developed,but unfortunately,the dissymmetry factors(g)are far from the requirement of practical *** ideal emitters and devices should have both high efficiency and a g factor,or at least a balance between these two *** review gives an overview of recent progress in chiral TADF materials,with a particular focus on the chiral skeleton,CPL property and device ***,the molecular design concept,device structure and methods to improve the g factors of chiral materials and CP-OLEDs are also discussed.

关键词： chiral thermally activated delayed fluorescence material chiral skeleton circularly polarized luminescence circularly polarized organic light-emitting diodes dissymmetry factor

Design guidelines for urea hydrolysers for ammonia demand of the SCR DENOX project in coal-fired power plants

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Frontiers in Energy 2013年第1期7卷 127-132页

作者： Peng zheng xuan YAO Wei zheng Beijing GUODIAN Longyuan Environmental Engineering CompanyLimited Beijing 100039 China

Ammonia is highly volatile and will present substantial environmental and operation hazards when leaking into the air. However, ammonia is the most common reactant in the DENOX project to eliminate NOx in the flue gas. The storage and transportation of liquid ammonia has always been a dilemma of the power plant. Urea is a perfect substitute source for ammonia in the plant. Urea hydrolysis technology can easily convert urea into ammonia with low expense. Presently, there is still no self-depended mature urea hydrolysis technology for the DENOX project in China; therefore, this paper proposes several guidelines to design the urea hydrolyser by theoretical analysis. Based on theoretical analysis, a simulation model is built to simulate the chemical reaction in the urea hydrolyser and is validated by the operational data of the commercial hydrolyser revealed in the literature. This paper endeavors to propose suggestions and guidelines to develop domestically urea hydrolysers in China.

关键词： urea hydrolyser ammonia selective catalytic reduction (SCR)

Outcomes of 1.8-3.0 mm incision phacoemulsification combined with trabeculectomy for primary angle-closure glaucoma with cataract

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International Journal of Ophthalmology(English edition) 2020年第2期13卷 246-251页

作者： Qing Wang zheng-xuan Jiang Rong-Feng Liao Department of Ophthalmology the First Affiliated Hospital of Anhui Medical UniversityHefei 230031Anhui ProvinceChina Department of Ophthalmology the Fourth Affiliated Hospital of Anhui Medical UniversityHefei 230012Anhui ProvinceChina Department of Ophthalmology the Second Hospital of Anhui Medical UniversityHefei 230601Anhui ProvinceChina

●AIM:To compare efficacy of coaxial microincisions(1.8 mm,2.2 mm)and small incisions(3.0 mm)on phacoemulsification combined with trabeculectomy for primary angle-closure glaucoma(PACG)with cataract.●METHODS:Ninety-six patients(96 eyes)with PACG and cataract were recruited and randomly divided into three groups between January 2015 and June *** A(3.0 mm incision),B(2.2 mm incision),and C(1.8 mm incision)comprised 30,34 and 32 eyes *** cases were treated with clear corneal incision phacoemulsification combined with *** including best corrected visual acuity(BCVA),corneal astigmatism,corneal endothelial cell counts(CECC),intraocular pressure(IOP),and complications were collected before the operation,and at postoperative 1 d,1 and 3 mo.●RESULTS:All the patients were successfully treated with *** BCVA of groups B and C were significantly improved as compared to group A at postoperative 1 d,1 and 3 mo(all P0.05).The corneal astigmatism of group A was statistically higher than that of group B(P=0.026);corneal astigmatism of group B was statistically higher than that of group C at postoperative 1 d(P=0.006).The corneal astigmatism of group A at postoperative 3 mo was significantly higher than that before operation(P=0.003).At postoperative 1 and 3 mo,corneal astigmatism of groups B and C were significantly lower than that of group A(all P<0.05).The CECC in group B was significantly higher than that of group A(P=0.020),and CECC in group C was significantly higher than that of group B(P=0.034)at postoperative 1 *** postoperative 1 and 3 mo,CECC of groups B and C were significantly higher than that of group A(all P<0.05).In each group,postoperative mean IOP at each time interval was significantly lower than preoperative IOP(all P<0.05).●CONCLUSION:Coaxial microincision phacoemulsification combined with trabeculectomy for PACG with cataract has bett

关键词： coaxial microincision glaucoma cataract phacoemulsification trabeculectomy

新精活物质乙卡西酮红外和拉曼光谱的理论与实验研究

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原子与分子物理学报 2025年第5期42卷 43-49页

作者：王树栋王椰欧阳佳慧张琳郑璇张艳贵州警察学院实验中心贵阳550000 贵州警察学院刑事技术系贵阳550000 贵州警察学院侦查系贵阳550000

基于密度泛函理论,在B3LYP/6-311++G(d,p)水平对新精神活性物质乙卡西酮进行结构优化,并在相同水平计算了其拉曼光谱和红外光谱.使用标准样品,实验测定了乙卡西酮的拉曼光谱和红外光谱,实验结果与理论计算非常吻合.势能分布(Potential e... 详细信息

基于密度泛函理论,在B3LYP/6-311++G(d,p)水平对新精神活性物质乙卡西酮进行结构优化,并在相同水平计算了其拉曼光谱和红外光谱.使用标准样品,实验测定了乙卡西酮的拉曼光谱和红外光谱,实验结果与理论计算非常吻合.势能分布(Potential energy distribution,PED)分析对谱峰进行了归属,实验和理论研究对照表明,乙卡西酮的拉曼特征峰为1001、1599、1694、2891、2936和3071 cm-1;红外吸收特征峰为698、1694、2734和2934 cm-1.研究发现,乙卡西酮苯环结构、C=O对拉曼光谱和红外光谱影响较为明显,而拉曼光谱结合红外光谱将更加有助于卡西酮类物质的鉴定,取代基团对光谱的贡献是区分卡西酮类物质的关键.本研究提供了乙卡西酮的拉曼光谱和红外光谱,并对其进行了归属,研究将对乙卡西酮及其它卡西酮类物质的光谱法快速鉴定提供重要借鉴和参考.

关键词：新精活物质乙卡西酮拉曼光谱红外光谱

Preparation and properties of silane coupling agent modified steel slag as functional filler for anti-corrosion coating

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Journal of Iron and Steel Research International 2023年第4期30卷 708-716页

作者： Wei-cheng zheng Wei-cheng Xu Hao Zhang Hao-xuan zheng Lin Wang zheng-ming Cheng Yan-fei Ye Jun Lin Hong-ming Long School of Metallurgical Engineering Anhui University of TechnologyMa’anshan 243032AnhuiChina Key Laboratory of Metallurgical Emission Reduction and Resources Recycling(Anhui University of Technology) Ministry of EducationMa’anshan 243002AnhuiChina School of Civil Engineering and Architecture Anhui University of TechnologyMa’anshan 243032AnhuiChina Department of Chemical and Biochemical Engineering Western UniversityLondonON N6A 3K7Canada Shanghai Baosteel New Building Materials Technology Co. Ltd.Shanghai 201900China Shougang Jingtang United Iron&Steel Co. Ltd.Tangshan 063200HebeiChina Zhanjiang Baosteel New Building Materials Technology Co. Ltd.Zhenjiang 524047GuangdongChina Guilin Hongcheng Mining Equipment Manufacture Co. Ltd.Guilin 541000GuangxiChina

The chemical composition and high wear resistance of steel slag(SS)make it a potential alternative to traditional inorganic fillers.3-Aminopropyltriethoxysilane(KH550)modified steel slag(MSS)was successfully prepared,and its application in epoxy(EP)anti-corrosion coating was *** to the grafting of silane coupling agent functional groups onto the surface of SS,MSS exhibited improved solubility in xylene organic solvent and reduced *** the MSS content was 15 wt.%,the contact angle of the MSS/EP composite coating was 101°,and the abrasion was only 0.07 g,compared with 56.2°and 0.13 g,respectively,for the pure EP *** corrosion resistance of coatings was investigated by performing the electrochemical test(impedance)after immersion in a 3.5 wt.%NaCl *** electrochemical test results showed that the impedance modulus of the 15 wt.%MSS/EP composite coating at low frequency(Z_(f)=0.01 Hz)was approximately 1.08×10^(7)Ωcm^(2),which was two orders of magnitude higher than that of the pure EP coating.

关键词： Steel slag Silane coupling agent Modification Epoxy coating Inorganic filler

Long-term outcomes of uveitic glaucoma treated with Ahmed valve implant in a series of Chinese patients

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International Journal of Ophthalmology(English edition) 2018年第4期11卷 629-634页

作者： Ning Bao zheng-xuan Jiang Paul Coh Li-Ming Tao Department of Ophthalmology the Second Affiliated Hospital of Anhui Medical University Department of Ophthalmology University of CaliforniaSan Francisco

AIM： To report long-term outcomes of secondary glaucoma due to uveitis treated with Ahmed glaucoma valve（AGV） implantation in a series of Chinese patients. METHODS： The retrospective study included 67 eyes from 56 patients with uveitic glaucoma who underwent AGV implantation. Success of the treatment was defined as patients achieving intraocular pressure（IOP） levels between 6 and 21 mm Hg with or without additional antiglaucoma medications and/or a minimum of 20% reduction from baseline IOP. The main outcome measurements included IOP, the number of glaucoma medications at 1, 3, 6, 12, 24, 36, 48 and 60 mo after surgery, surgical complications, final best-corrected vision acuity（BCVA）, visual field（VF） and retinal nerve fiber layer（RNFL）.RESULTS： The mean follow-up was 53.3±8.5（range 48 to 60）mo. The cumulative probability of success rate was 98.5%, 95.5%, 89.6%, 83.6%, 76.1%, 70.1%, 65.7% and 61.2% at 1, 3, 6, 12, 24, 36, 48 and 60 mo, respectively. IOP was reduced from a baseline of 30.8±6.8 to 9.9±4.1, 10.1±4.2, 10.9±3.7, 12.9±4.6, 13.8±3.9, 13.2±4.6, 12.3±3.5 and 13.1±3.7 mm Hg at 1, 3, 6, 12, 24, 36, 48 and 60 mo, respectively（P〈0.01）. The number of postoperative glaucoma medications was significantly decreased compared with baseline at all time points during the study period（P〈0.05）. There was no significant difference between preoperative and postoperative BCVA. Remarkable surgical complications were not found after surgery. The VF and RNFL of the patients were stable after the ***： AGV implantation is safe and effect in terms of reducing IOP, decreasing the number of glaucoma medications, and preserving vision for patients with uveitic glaucoma.

关键词： uveitic glaucoma Ahmed glaucoma valve follow-up Chinese population

New two-point scleral-fixation technique for foldable intraocular lenses with four hollow haptics

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International Journal of Ophthalmology(English edition) 2016年第3期9卷 469-471页

作者： He-Ting Liu zheng-xuan Jiang Li-Ming Tao Department of Ophthalmology the Second Hospital Affiliated to Anhui Medical University Hefei 230601 Anhui Province China

The study was to report a new two-point scleralfixation technique for foldable intraocular lenses with four *** were slid into the anterior chamber from a 2.8 mm corneal incision and fixed under two sclera flaps at two opposite *** postoperative best-corrected visual acuities（BCVAs） of all patients were significantly better than their preoperative *** results demonstrate that two-point,scleral fixations of foldable,intraocular lenses might be practicable and effective.

关键词： cataract intraocular lens aphakia scleral fixation

Mass concentrations and temporal profiles of PM10, PM2.5 and PM1 near major urban roads in Beijing

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Frontiers of Environmental Science & Engineering 2015年第4期9卷 675-684页

作者： Liu YANG Ye WU Jiaqi LI Shaojie SONG xuan zheng Jiming HAO School of Environment and State Key Joint Laboratory of Environment Simulation and Pollution Control Tsinghua University Beijing 100084China Division of Environment and Resources Research Transport Planning and Research Institute Beijing 100028 China State Environmental Protection Key Laboratory of Source and Control of Air Pollution Complex 13eijing 100084 China Department of Earth Atmospheric and Planetary Sciences Massachusetts Institute of Technology Cambridge MA 02139 USA

Mass concentrations of PM10, PM2.5 and PM1 were measured near major roads in Beijing during six periods： summer and winter of 2001, winter of 2007, and periods before, during and after the 2008 Beijing Olympic Games. Since the control efforts for motor vehicles helped offset the increase of emissions from the rapid growth of vehicles, the averaged PM2.5 concentrations at roadsides during the sampling period between 2001 and 2008 fluctuated over a relatively small range. With the implementation of temporary traffic control measures during the Olympics, a clear “V” shaped curve showing the concentrations of particulate matter and other gaseous air pollutants at roadsides over time was identified. The average concentrations of PM10, PM2.5, CO and NO decreased by 31.2%, 46.3%, 32.3% and 35.4%, respectively, from June to August; this was followed by a rebound of all air pollutants in December 2008. Daily PM10 concentrations near major roads exceeded the National Ambient Air Quality Standard （Grade II） for 61.2% of the days in the non-Olympic periods, while only for 12.5% during the Olympics. The mean ratio of PM2.5/PM10 near major roads remained relatively stable at 0.55 （±0.108） on non-Olympic days. The ratio decreased to 0.48 （±0.099） during the Olympics due to a greater decline in fine particles than in coarse-mode PM. The ratios PM1/PM2.5 fluctuated over a wide range and were statistically different from each other during the sampling periods. The average ratios of PM1/PM2.5 on non-Olympic days were 0.71.

关键词： particulate matter traffic control measure,Beijing Olympic Games

Real-world fuel consumption of light-duty passenger vehicles using on-board diagnostic (OBD) systems

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Frontiers of Environmental Science & Engineering 2020年第2期14卷 207-216页

作者： xuan zheng Sheng Lu Liuhanzi Yang Min Yan Guangyi Xu Xiaomeng Wu Lixin Fu Ye Wu College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060China School of Environment State Key Joint Laboratory of Environment Simulation and Pollution ControlTsinghua UniversityBeijing 100084China International Council on Clean Transportation Beijing 100084China Shenzhen Research Academy of Environmental Sciences Shenzhen 518001China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing 100084China

An increasing discrepancy between real-world and type-approval fuel consumption for light-duty passenger vehicles(LDPVs)has been reported by several ***,real-world fuel consumption is measured primarily by a portable emission measurement *** on-board diagnostic(OBD)approach,which is flexible and offers high-resolution data collection,is a promising fuel consumption monitoring *** LDPVs were tested with a laboratory dynamometer based on a type-approval cycle,the New European Driving Cycle(NEDC).Fuel consumption was measured by the OBD and constant-volume sampling system(CVS,a regulatory method)to verify the accuracy of the OBD *** results of the OBD method and the regulatory carbon balance method exhibited a strong linear correlation(e.g.,R^2=0.906-0.977).Compared with the carbon balance results,the fuel consumption results using the OBD were 7.1%±4.3%lower on ***,the real-world fuel consumption of six LDPVs was tested in Beijing using the *** results showed that the normalized NEDC real-world fliel consumption of the tested vehicles was 13%±17%higher than the type-approval-based fuel *** the OBD values are lower than the actual fuel consumption,using a carbon balance method may result in a larger discrepancy between real-word and type-approval ftiel *** means of the operating mode binning and micro trip methods,a strong relationship(R^2=0.984)was established between the average speed and relative fuel *** congested roads(average vehicle speed less than 25 km/h),the fuel consumption of LDPVs is highly sensitive to changes in average speed.

关键词： Fuel consumption Light-duty passenger vehicles On-board diagnostic systems