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Mechanism and selectivity of copper-catalyzed borocyanation of 1-aryl-1,3-butadienes:A computational study

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Chinese Chemical Letters 2021年第1期32卷 9-12页

作者： Xinzhi Li Xiangwei Ren Hongli Wu Wentao Zhao xiangyang tang Genping Huang Department of Chem istry School of Science and Tianjin Key Laboratory of Molecular Optoelectronic SciencesTianjin UniversityTianjin 300072China

Density functional theory calculations have been performed to investigate the copper-catalyzed borocyanation of 1-aryl-1,*** computations show that the regio-and enantioselectivity is determined by the borocupration *** π-electron withdrawing aryl group at the C' atom makes the C4 atom more electrophilic than the other carbon atoms,which together with the steric repulsion around the forming C-B bond,re sults in the experimentally observed exclusive 4,*** origins of the enantioselectivity were attributed to the steric effect and π-π stacking interaction between the butadiene moiety and the ligand.

关键词： Copper catalyst Borocyanation Mechanism Selectivity DFT calculations

Ultrathin wavy nanowires of high-entropy alloy as cocktail solution in methanol oxidation reaction

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Progress in Natural Science:Materials International 2023年第2期33卷 225-231页

作者： Songyuan Yuan Xiran Zhu Hui Li Zheng Hu Qianqian Ren Wenbo Zhao xiangyang tang Shi Hu Department of Chemistry School of Science Tianjin Key Laboratory of Molecular Optoelectronic Science Tianjin University Institute of Energy Hefei Comprehensive National Science Center

High entropy alloys(HEAs) with adjustable composition and diverse surface active sites show good catalytic performance of methanol oxidation reaction(MOR). However, the synthesis and morphology control of HEA remains a challenge. Herein, we use a fast co-reduction method to synthesize a series of ultrathin wavy nanowires(WNWs) with an average diameter of 3–5 nm, including Pt-based and Pd-based binary alloys, and HEA with different pairs of immiscible elements. The catalytic properties of Pt Pd Ag Cu Ni WNWs show that the mass activity and stability of Pt Pd Ag Cu Ni WNWs is higher than Pt and Pd WNWs. Meanwhile we explored the cocktail effect among high entropy alloy elements through annealing. The cocktail effect among the metal elements in Pt Pd Ag Cu Ni WNWs provided more active sites with increased metal-metal interactions, thus improving the catalytic efficiency.

关键词： High-entropy alloy Co-reduction Cocktail effect Methanol oxidation reaction

Constructing multifunctional deep-blue emitters with weak charge transfer excited state for high-performance non-doped blue OLEDs and single-emissive-layer hybrid white OLEDs

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Chinese Chemical Letters 2024年第10期35卷 175-179页

作者： Hui Liu xiangyang tang Zhuang Cheng Yin Hu Yan Yan Yangze Xu Zihan Su Futong Liu Ping Lu State Key Laboratory of Supramolecular Structure and Materials Department of Chemistry Jilin UniversityChangchun 130012China Sichuan Province Key Laboratory of Information Materials and Devices Application College of Optoelectronic EngineeringChengdu University of Information TechnologyChengdu 610225China

Deep-blue emitter with high photoluminescence efficiency(PLQY)is highly desirable in ultra-high definition displays and white solid-state *** this work,two deep-blue phenanthro[9,10]imidazole derivatives,PPIS and PPPIS,with hot exciton property are successfully *** to PPIS,the embedded phenyl bridge in PPPIS is able to effectively increase the overlap of frontier molecular *** consequence,PPPIS shows higher oscillator strength and significantly enhanced *** also achieves better electroluminescence performance in non-doped device,showing deep-blue emission with Commission International de l’Eclairage(CIE)coordinates of(0.153,0.087)and the maximum external quantum efficiency(EQEmax)of 8.5%with minuscule efficiency ***,when PPPIS serves as the host for phosphor PO-01,high-efficiency orange phosphorescent device is obtained with high EQEmax of 29.8%and negligible efficiency roll-off at 1000 cd/m^(2).Further,efficient single-emissive-layer white device is assembled via utilizing PPPIS as a blue emitter as well as the host for PO-01 simultaneously,providing warm-white emission with CIE coordinates of(0.429,0.433)at 1000 cd/m^(2),the forward-viewing EQEmaxof 27.2%and maximum power efficiency(PEmax)of 80.1 lm/W,*** studies can establish a viable design strategy for deep-blue emitters in high-performance non-doped blue OLEDs and hybrid WOLEDs.

关键词： Deep-blue emitters Phenanthroimidazole Hot exciton Host Single-emissive-layer white device

Emotional memory in patients with earlystage Parkinson’s disease

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China Medical Abstracts(Internal Medicine) 2019年第2期36卷 126-127页

作者： tang xiangyang Dept Neurol Anqing Municipal HospAnqing 246003

Objective To explore the characteristics of emotionalmemory in patients with early-stage Parkinson's disease(PD). Methods The methods of emotional memory neuro-cognitive test and event-related evoked potentials(ERPs) test were set. The emotional memory was detectedin 30 early-stage PD patients without treatment (PDgroup) and 30 matched (including education level,etc)healthy controls (control group),who were recruited inthe Department of Neurology,Anqing Municipal Hospitalfrom June 2016 to June 2018. Results Compared withthe control group (55. 83% ± 4. 17%),the negative valence picture recognition rate in the PD group (50. 30% ±4. 04%) showed statistically significant difference ( t =4. 85,P < 0. 05). The ERPs-P300 latency was (337. 47 ±7. 87) ms,the amplitude was (6. 34 ± 0. 62) μV,andthe reaction time was (3 729. 21 ± 226. 85) ms in thecontrol group,showing a statistically significant difference( t = - 3. 30,4. 04,2. 76,P < 0. 05) comparedwith that in the PD group (( 344. 20 ± 7. 94 ) ms,(5. 75 ± 0. 52) μV,(3 935. 33 ± 222. 24) ms,respectively).

关键词： Emotional memory earlystage Parkinson’s disease

Axial Cone Beam Reconstruction with Asymptotic Trajectory Extrapolation Implemented by 3-D Weighting Scheme

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Tsinghua Science and Technology 2010年第1期15卷 114-119页

作者： tang xiangyang Department of Radiology,Emory University School of Medicine,Atlanta 30322,USA Computed Tomography and Molecular Imaging,GE Healthcare,Waukesha 53188,USA [a] Department of Radiology Emory University School of Medicine Atlanta 30322 USA Computed Tomography Molecular Imaging GE Healthcare Waukesha 53188 USA

Axial scan along circular trajectory has been the most desirable in clinical and preclinical applications. However, due to the violation of the data sufficiency condition, the reconstruction accuracy of axial scan deteriorates rapidly with increasing detector z-dimension. A number of algorithms have been proposed thus far to improve the reconstruction accuracy. It is well understood that, the larger the radius of circular trajectory the more accurate the reconstruction. Ultimately, the reconstruction becomes accurate if the trajectory radius reaches infinite. Inspired by such observations, an asymptotic weighting scheme is proposed here for axial scan at large cone angles to improve reconstruction accuracy. In practice, there may be other ways to im- plement the asymptotic 3-D weighting scheme, and we present one approach in this paper with preliminary results. Further investigation may enable this asymptotic weighting scheme to improve reconstruction accuracy significantly, enabling numerous applications in which axial scan at large z-dimension is desired.

关键词： computed tomography (CT) cone beam volumetric CT volumetric.CT image reconstruction tomography cone beam reconstruction axial scan

3,5-二取代的异噁唑啉类衍生物的合成及杀菌活性研究

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有机化学 2014年第9期34卷 1800-1805页

作者：宁国慧赵温涛边强唐向阳天津大学理学院化学系天津300072 南开大学国家农药工程研究中心天津300071

取代苯甲醛与盐酸羟胺反应生成取代苯甲醛肟,经氯代得到相应的氯代苯甲醛肟,再和N-乙烯基吡咯烷酮、2-乙烯基吡啶、4-乙烯基吡啶等进行1,3-偶极环加成反应,合成了15个未见报道的异噁唑啉类化合物.其结构经过1H NMR,13C NMR及高分辨质谱... 详细信息

取代苯甲醛与盐酸羟胺反应生成取代苯甲醛肟,经氯代得到相应的氯代苯甲醛肟,再和N-乙烯基吡咯烷酮、2-乙烯基吡啶、4-乙烯基吡啶等进行1,3-偶极环加成反应,合成了15个未见报道的异噁唑啉类化合物.其结构经过1H NMR,13C NMR及高分辨质谱表征.初步的生物活性测试结果表明,目标化合物3b对黄瓜灰霉表现出了很好的防效,化合物3c对番茄早疫、花生褐斑和油菜菌核表现出了很好的防效,化合物3e^3o对花生褐斑、苹果轮纹、番茄早疫、小麦赤霉、辣椒疫霉、油菜菌核、水稻纹枯等7种真菌具有很好的防效,表现出了广谱的抑菌活性.

关键词： 1,3-偶极环加成异噁唑啉合成结构表征杀菌活性

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不饱和烃在碘催化下一锅法合成α-酮酰胺

有机化学 2015年第8期35卷 1733-1738页

作者：任相伟王光伟唐向阳赵温涛天津大学理学院化学系天津300072

介绍了一种以烯烃或炔烃为原料、以过氧化叔丁醇为氧化剂和碘为催化剂的一锅法合成α-酮酰胺的简便方法.该方法具有很好的原子经济性、避免使用重金属催化剂、反应条件温和、产率高等优点,解决了以往α-酮酰胺合成中条件苛刻、原料不易... 详细信息

介绍了一种以烯烃或炔烃为原料、以过氧化叔丁醇为氧化剂和碘为催化剂的一锅法合成α-酮酰胺的简便方法.该方法具有很好的原子经济性、避免使用重金属催化剂、反应条件温和、产率高等优点,解决了以往α-酮酰胺合成中条件苛刻、原料不易得、产率低等问题.α-酮酰胺在生物活性分子和药物分子的合成上具有潜在的应用价值.

关键词： α-酮酰胺烯烃炔烃碘过氧化叔丁醇

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高频经颅磁刺激治疗丘脑痛的临床研究

中华神经医学杂志 2023年第9期22卷 899-903页

作者：姜旭唐向阳陈祚胜安徽医科大学第五临床医学院合肥230022 安徽医科大学附属安庆医学中心神经内科安庆246003

目的探讨高频重复经颅磁刺激(hrTMS)治疗丘脑痛的短期临床疗效及安全性。方法前瞻性选择自2022年12月至2023年8月安徽医科大学附属安庆医学中心神经内科收治的41例接受hrTMS治疗的丘脑梗死后中枢性神经痛患者进行研究,依据刺激部位的不... 详细信息

目的探讨高频重复经颅磁刺激(hrTMS)治疗丘脑痛的短期临床疗效及安全性。方法前瞻性选择自2022年12月至2023年8月安徽医科大学附属安庆医学中心神经内科收治的41例接受hrTMS治疗的丘脑梗死后中枢性神经痛患者进行研究,依据刺激部位的不同将患者分为干预健侧次级感觉皮层(S2)治疗组(S2组,n=21)与干预健侧初级运动皮层(M1)治疗组(M1组,n=20)。分别于治疗前、伪刺激治疗后第1周末及有效刺激治疗后第1、2、3周末时,对2组患者进行简易McGill问卷评分,应用肌电诱发电位仪监测诱发电位N100波幅,同时观察治疗周期内不良反应发生情况。结果(1)与治疗前比较,有效刺激治疗后第2、3周末时S2组患者的感觉项评分、情绪项评分、视觉模拟评分(VAS)、现有痛评分均明显降低,差异均有统计学意义(P0.05)。结论hrTMS刺激健侧S2区或M1区均可有效改善丘脑痛患者的短期疼痛程度且无明显副作用,其中刺激S2区的镇痛效果更好。

关键词：高频重复经颅磁刺激丘脑痛初级运动皮层次级感觉皮层

重复经颅磁刺激对前额叶损伤患者认知功能的影响

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中华神经科杂志 2015年第8期48卷 687-690页

作者：袁良津唐向阳陈祚胜安徽医科大学附属安庆医院神经内科 246003

目的探讨重复经颅磁刺激（repetitive transcranial magnetic stimulation,rTMS）对前额叶损伤患者认知功能的影响.方法选取安徽医科大学附属安庆医院神经外科和神经内科2012年1月至2014年10月住院的21例前额叶损伤的患者,对所有受试... 详细信息

目的探讨重复经颅磁刺激（repetitive transcranial magnetic stimulation,rTMS）对前额叶损伤患者认知功能的影响.方法选取安徽医科大学附属安庆医院神经外科和神经内科2012年1月至2014年10月住院的21例前额叶损伤的患者,对所有受试者均予常规治疗作为背景治疗.同时给予rTMS治疗,分别于治疗前、后进行事件相关电位P300检查和蒙特利尔认知评估量表（MoCA）评分.结果与治疗前比较,rTMS治疗后P300潜伏期[分别为（367.38±9.79）、（345.43±11.31）ms]明显缩短（t=5.33,P＜0.05）、波幅[分别为（4.79±1.02）、（7.84±1.40） μV]明显增高（t=-8.08,P＜0.05）,MoCA总分[分别为（19.57±2.06）、（23.91±1.30）分]、记忆测试得分[分别为（2.19±0.81）、（4.10±0.89）分]和执行能力[分别为（2.52±1.08）、（3.57±0.93）分]明显增高（t=-8.14、-7.24、-3.38,均P＜0.05）;且左、右侧额叶损伤的患者治疗前的MoCA总分[分别为（18.22±1.56）、（20.58±1.83）分]、记忆测试得分[分别为（1.89±0.78）、（2.42±0.79）分]和执行能力[分别为（1.56±0.53）、（3.25±0.75）分]差异有统计学意义（t=-3.11、-2.26、-5.76,均P＜0.05）,其余各项测试左右侧差异无统计学意义（P＞0.05）.结论 rTMS能改善前额叶损伤患者认知功能,且是安全的.

关键词：经颅磁刺激额叶前皮质认知执行功能脑损害,慢性