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Stable Boron-Containing Blue-Photoluminescent Radicals

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Chinese Journal of Chemistry 2021年第5期39卷 1297-1302页

作者： zhongtao Feng Yuanyuan Chong Shuxuan Tang Huapeng Ruan Yong Fang Yue Zhao Jun jiang Xinping Wang State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical EngineeringCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjingJiangsu 210093China Hefei National Laboratory for Physical Sciences at the Microscale CAS Center for Excellence in NanoscienceSchool of Chemistry and Materials ScienceUniversity of Science and Technology of ChinaHefeiAnhui 230026China

It is highly urgent to develop synthetic strategies to make new category of stable luminescent radicals with desired emission wavelength.In this study,we have isolated two dioxoborocyclic radicals(3 and 4)by a direct synthetic route.They were characterized by UV,EPR spectroscopy and SQUID measurements.Their structures were obtained by single-crystal X-ray diffraction.Both radicals produce blue-photoluminescence(458 nm for 3 and 478 nm for 4)by radiative decay from higher excited states(D_(2)/D_(3))to the ground state(D_(0))based on theoretical calculation,breaking Kasha rule.The work records a new kind of radical emitters and the first stable radicals with blue emission bands.

关键词： Boron Borocyclic radical Radical emitter Blue-photoluminescence X-Ray structure

High-resolution sequence architecture and depositional evolution of the Quaternary in the northeastern shelf margin of the South China Sea

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Acta Oceanologica Sinica 2019年第5期38卷 86-98页

作者： Hanyao Liu Changsong Lin zhongtao Zhang Bo Zhang Jing jiang Hongxun Tian Huan Liu School of Ocean Sciences China University of Geosciences Shenzhen Branch of CNOOC Ltd.

The northeastern shelf margin of the South China Sea(SCS) is characterized by the development of large scale foresets complexes since Quaternary. Based on integral analysis of the seismic, well logging and paleontological data, successions since ～3.0 Ma can be defined as one composite sequence, consist of a set of regional transgressive to regressive sequences. They can be further divided into six 3 rd order sequences(SQ0–SQ5) based on the Exxon sequence stratigraphic model. Since ～1.6 Ma, five sets of deltaic systems characterized by development of wedge-shaped foresets complexes or clinoforms had been identified. High-resolution seismic data and the thick foresets allowed further divided of sub-depositional sequences(4 th order) of regression to transgression, which is basically consistent with published stacked benthic foram O-isotope records. Depositional systems identified in the study area include deltaic deposits(inner-shelf deltas and shelf-edge deltas), incised valleys, and slope slumping massive deposits. Since ～1.6 Ma, clinoforms prograded from the southern Panyu Lower Uplift toward the northern Baiyun Depression, shelf slope break migrated seaward, whereas the shelf edge of SQ0 migrated landward. The development of incised valleys in the continental shelf increased upward,especially intensive on the SB3 and SB2. The slumping massive deposits increased abruptly since SB2, which corresponds to the development of incised valleys. The evolution of depositional systems of continental slope mainly controlled by the combined influence of sea level changes, tectonic movements, sediment supply and climate changes. Since ～3.0 Ma, relative sea level of the northern SCS had been experienced transgression(～3.0 Ma BP) to regression(～1.6 Ma BP). The regional regression and maximum transgressions of the composite sequences were apparently enhanced by uplift or subsidence related to tectono-thermal events. In addition,climatic variations including monsoon intensification and the mid-Pleistocene transition may have enh

关键词： sequence architecture depositional systems continental slope Quaternary Zhujiang(Pearl)River Mouth Basin

Catalytic Synthesis of N-Ethyl Carbamate from Ethylamine and Dimethyl Carbonate

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Chinese Journal of Catalysis 2000年第2期21卷 101-102页

作者： jiang Qi, FENG Jingxian, HUANG zhongtao(Department of Chemical Engineering, South China University of Technology, Guangzhou 510641, China) 华南理工大学广东广州 510641

Isocyanates are the main feedstock for the polyurethane industry.

关键词： catalytic synthesis ethyl carbamate ethylamine dimethyl carbonate

THE EFFECT OF IODOMETHANE ON THE DIRECT SYNTHESIS OF DIMETHYL CARBONATE

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Chinese Journal of Catalysis 1999年第6期20卷 585-586页

作者： jiang Qi, Li Tao, Liu Feng, Huang zhongtao (Department of Chemical Engineering, South China University of Technology, Guangzhou 510641) 华南理工大学广东广州

Dimethyl carbonate (DMC) is an environmentally friendly compound and a substitutive intermediate for highly toxic phosgene or dimethyl sulfate in carbonylation and methylation reactions as well as a promising octane booster. The common methods for its preparation are the oxidative carbonylation of methanol catalyzed by a variety of transition metal ions and the transesterification of ethylene carbonate or propene carbonate with methanol[1]. The direct synthesis of DMC from carbon dioxide and methanol is a challenging route in which the most abundant carbon resources and a main greenhouse gas is used as feedstock. A new method for the direct synthesis of DMC catalyzed by the methoxide of main group metal has attracted more and more attention since it was reported[2～6] . However the lower conversion of the reaction has become the main obstacle for its application. In this letter, an efficient promoter for the direct synthesis of DMC is reported.

关键词： iodomethane promoter carbon dioxide methanol metal methoxide dimethylcarbonate

热处理对Mg-3.4Al-2Ca合金组织与力学性能的影响

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热加工工艺 2022年第8期51卷 132-134,138页

作者：代芳芳姜中涛西南铝业(集团)有限责任公司重庆401326 重庆文理学院材料表界面科学重庆市重点实验室重庆402160

对铸态Mg-3.4Al-2Ca合金进行先固溶热处理,再进行热挤压变形处理,研究了固溶热处理对铸态和挤压态合金组织以及挤压态合金力学性能的影响。结果表明,与未固溶处理相比,高温固溶处理可使镁合金中亚稳(Mg,Al)2Ca相转变为稳定的Al_(2)Ca相... 详细信息

对铸态Mg-3.4Al-2Ca合金进行先固溶热处理,再进行热挤压变形处理,研究了固溶热处理对铸态和挤压态合金组织以及挤压态合金力学性能的影响。结果表明,与未固溶处理相比,高温固溶处理可使镁合金中亚稳(Mg,Al)2Ca相转变为稳定的Al_(2)Ca相。挤压后合金发生完全再结晶,晶粒细小均匀,Al_(2)Ca第二相破碎成颗粒状,且有大量亚微米级Al_(2)Ca分布于合金中。固溶处理再挤压合金比仅固溶处理合金的屈服强度、抗拉强度和伸长率分别提高了25.0%、9.5%和15.1%。

关键词： Mg-Al-Ca合金固溶处理挤压变形 Al_(2)Ca

A　NEW　CATALYTIC　PROCESS　FOR　THE　DIRECT　SYNTHESIS　OF　DIMETHYL　CARBONATE　FROM　CARBON　DIOXIDE　AND　METHANOL

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Chinese Journal of Catalysis 1996年第2期17卷 91-92页

作者： jiang Qi Lin Qihe Huang zhongtao (Department of Chemical Engineering,South China University of Technology, Guangzhou 510641) Department of Chemical Engineering South China University of Technology Guangzhou 510641

ＡＮＥＷＣＡＴＡＬＹＴＩＣＰＲＯＣＥＳＳＦＯＲＴＨＥＤＩＲＥＣＴＳＹＮＴＨＥＳＩＳＯＦＤＩＭＥＴＨＹＬＣＡＲＢＯＮＡＴＥＦＲＯＭＣＡＲＢＯＮＤＩＯＸＩＤＥＡＮＤＭＥＴＨＡＮＯＬ￥ＪｉａｎｇＱｉ；ＬｉｎＱｉｈｅ；Ｈｕａ... 详细信息

ＡＮＥＷＣＡＴＡＬＹＴＩＣＰＲＯＣＥＳＳＦＯＲＴＨＥＤＩＲＥＣＴＳＹＮＴＨＥＳＩＳＯＦＤＩＭＥＴＨＹＬＣＡＲＢＯＮＡＴＥＦＲＯＭＣＡＲＢＯＮＤＩＯＸＩＤＥＡＮＤＭＥＴＨＡＮＯＬ￥ＪｉａｎｇＱｉ；ＬｉｎＱｉｈｅ；ＨｕａｎｇＺｈｏｎｇｔａｏ（Ｄｅｐａｒｔ...

关键词： dimethyl carbonate carbon dioxide methanol magnesium methoxidecatalyst

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《上海市农药管理规定》新规解读

世界农药 2023年第4期45卷 22-26页

作者：姜忠涛上海市农业技术推广服务中心上海201103

《上海市农药管理规定》已自2020年12月1日起正式施行,是2017年新《农药管理条例》发布实施后我国出台的第一个农药管理方面的省级地方法规,是上海市结合自身情况在国家层面相关上位农药管理法规的基础上,对该市农药管理举措的细化、补... 详细信息

《上海市农药管理规定》已自2020年12月1日起正式施行,是2017年新《农药管理条例》发布实施后我国出台的第一个农药管理方面的省级地方法规,是上海市结合自身情况在国家层面相关上位农药管理法规的基础上,对该市农药管理举措的细化、补充和完善。也是政府管理部门针对新时期我国农药管理领域所面临的新形势和涌现的新问题而做出的积极探索和有益实践。

关键词：上海市农药管理规定政策解读

Ti(C_(0.5)N_(0.5))颗粒增强钛基复合材料显微组织和力学性能的研究

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钢铁钒钛 2022年第3期43卷 59-64页

作者：韩威姜中涛杨鑫敬小龙成都大学机械工程学院四川成都610100 重庆文理学院材料科学与工程学院重庆402160 材料表界面科学重庆市重点实验室重庆402160

以纯Ti粉、Ti(C_(0.5)N_(0.5))颗粒为原料,采用粉末冶金工艺,制备了Ti(C_(0.5)N_(0.5))颗粒增强钛基复合材料,研究了Ti(C_(0.5)N_(0.5))含量对钛基复合材料组织和力学性能的影响。结果表明:Ti(C_(0.5)N_(0.5))颗粒的添加,显著细化了钛... 详细信息

以纯Ti粉、Ti(C_(0.5)N_(0.5))颗粒为原料,采用粉末冶金工艺,制备了Ti(C_(0.5)N_(0.5))颗粒增强钛基复合材料,研究了Ti(C_(0.5)N_(0.5))含量对钛基复合材料组织和力学性能的影响。结果表明:Ti(C_(0.5)N_(0.5))颗粒的添加,显著细化了钛基体的晶粒,晶粒形貌由粗大的柱状晶转变为细小的等轴晶;随着Ti(C_(0.5)N_(0.5))含量的增加,钛基复合材料的孔隙明显减少,致密度提高,钛基复合材料的硬度和屈服强度逐渐增加,但压缩应变逐渐减小。

关键词：钛基复合材料 Ti(C_(0.5)N_(0.5))颗粒粉末冶金显微组织力学性能

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跨越断层的钢制埋地管道响应数值模拟研究

世界地震工程 2023年第4期39卷 46-52页

作者：张如林蒋城李帅张忠涛中国石油大学(华东)储运与建筑工程学院山东青岛266580

以西气东输二线工程为背景,基于ABAQUS有限元软件建立了走滑逆断层条件下的管道-土体三维有限元模型,并通过软件模拟,分析了断层位移量、管道内压、管道径厚比和管道埋深等因素对管道应力和应变响应规律的影响。数值模拟结果表明:管道... 详细信息

以西气东输二线工程为背景,基于ABAQUS有限元软件建立了走滑逆断层条件下的管道-土体三维有限元模型,并通过软件模拟,分析了断层位移量、管道内压、管道径厚比和管道埋深等因素对管道应力和应变响应规律的影响。数值模拟结果表明:管道的最大轴向应变点并不在断层面上,而是在断层面的两侧;管道有无内压的破坏模式不同,内压越大,管道越容易遭受破坏;管道的径厚比越小,断层面两侧最大轴向应变点距离断层面的距离越远;浅埋能够减小断层作用下管道的最大轴向应变,在断层位移量较大时,宜选择浅埋。

关键词：埋地管道断层管土相互作用影响因素应力应变