检索结果-南通市图书馆

Synthesis and Structure of Tris (methylcyclopentadienyl)Praseodymium

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 1997年第5期16卷 384-387页

作者： zhou xi-geng HUANG Zu-En CAI Rui-Fang YU Sheng-Nan(Department of Chemistry, Fudan University, Shanghai 200433)HUANG xiao-Ying(State Key boory of Stractural Chemistry, Fuzhou 350002) 复旦大学化学系上海中科院福建物质结构所结构化学国家重点实验室福建福州

茂基稀土邻氨基苯甲酰胺基双负离子配合物的合成及其环胺羰化反应和脒基化反应（英文）

在线全文

学校读者我要写书评

暂无评论

无机化学学报 2017年第11期33卷 2124-2138页

作者：孙燕刘瑞婷翁林红周锡庚复旦大学化学系、上海市分子催化与功能材料重点实验室上海200433 金属有机化学国家重点实验室上海200032

Cp_3Ln与邻氨基苯甲酰胺在甲苯中反应,之后在HMPA和甲苯中结晶,以中等到高收率得到四核稀土有机配合物[CpLn(μ-η~2∶η~2-NHC_6H_4CONH)(μ_3-η~1∶η~1∶η~2-NHC_6H_4CONH)LnCp(HMPA)}2(Ln=Yb,1a;Er,1b;Y,1c)。化合物1与4倍物质的量的Ph NCO在甲苯中反应形成1,3-喹唑啉二氧基(Quo)双负离子稀土配合物[Cp2Ln(μ3-η2∶η2∶η1-Quo)]3Ln(HMPA)2(Ln=Yb,2a;Er,2b;Y,2c),表明化合物1中的Ln-NHAr键和Ar CONH-Ln键能与异氰酸酯分子发生连续加成/胺消除反应,形成1,3-喹唑啉二氧基骨架。但化合物1a^1c与i Pr N=C=NiPr反应,仅得到Ar NH基单加成产物{Cp——2Ln[μ-η~1∶η~1∶η~2-iPrNC(NHiPr)NC_6H_4CONH]}3Ln(HMPA)3(Ln=Yb,3a;Er,3b;Y,3c)。而Cp3Ln与邻氨基苯甲酰胺和i Pr N=C=Ni Pr在甲苯中进行"一锅"反应,则形成双核配合物{CpLn[μ-η~1∶η~2∶η~2-NHCOC_6H_4NC(NHiPr)NiPr]}2(Ln=Yb,4a;Er,4b;Y,4c)。值得注意的是,HMPA能够诱导配合物4发生配体重排反应,转化成化合物3。

关键词：稀土配合物环胺羰化反应异氰酸酯邻氨基苯甲酰胺加成反应

Molecular　Structure　of　Organolanthanide　Complex　［（η~5－CH_3C_5H_4）_2Tb（μ－Cl）（THF）］_2

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 1996年第5期15卷 367-370页

作者： WU Zhong-Zhi HUANG Zu-En CAI Rui-Fang(Department of Chemistry, Fudan University Shanghai 200433)zhou xi-geng XU Zheng YOU xiao-Zeng(State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093)HUANG xiao-Ying(State Key Laboratory Department of Chemistry Fudan University Shanghai 200433 State Key Lab. of Coord. Chemistry Nanjing University Nanjing 210093 State Key Lab. of Struct. Chemistry Fuzhou 350002

The complex [(η5-CH3C5H4)2Tb(μ-Cl) (THF)]2, has been studied by X-ray crystallography. The crystal is orthorhombic , space group Phcn with a= 20.414(2),b=9. 548(1),c=16.390(6)A.V=3194.9(6) A3, Mr=849.46,Z=4,Dc=1.77 g/cm3, F(000)=1664,μ=46.37 *** Tb3+ ion is coordinated by two CH3C5H4 groups, two chloride ions and one oxygen atom from tetrahydrofuran to form a distorted trigonal bipyramidal geometry. Two bridging Tb-Cl bond lengths are 2. 716(2) and 2.790(2)A,*** Tb-O (THF) and average Tb-C(CH3C5H4) bond lengths are 2.559(6) and 2.670(4)A,respectively.

关键词： lanthanide terbium methylcyclopentadienyl crystal structure

Synthesis and Structure of E-2-(2,4,6-tri tert butylphenylphosphinyl)-2-〔N-(tert-butyldimethylsilyl)-N-(p-chrolophenyl)〕amino-1-(2,4,6-tri tert-butyl-phenyl)phosphacthylene

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2000年第2期 86-90页

作者： ZHANG Li xin PANG Zhen * zhou xi geng CAI Rui Fang HUANG Zu En (Department of Chemistry, Fudan University, Shanghai 200433) SUN Jie (Shanghai Institute of Organic Chemistry, the Chinese Academy of Sciences,Shanghai 200032)

The title compound E 2 (2,4,6 tri tert butylphenylphosphinyl) 2 〔 N (ter t butyldimethylsilyl) N (p chrolophenyl)〕amino 1 (2,4,6 tri tert butyl phenyl)phosphacthylene(C 49 H 78 NClP 2Si, M r =806.65) was synthesized and characterized by X ray diffraction analysis. The crystal is monoclinic, space group P2 1/n with a=10.319(3), b=23.309(5), c=21.41(1) , β=99.64(5)°, V=5078(3) 3, Z=4, D c =1.05g/cm 3, F(000)=1760, μ =1.92cm -1 . Due to the steric hindrance from substituents around phosphaethylene, the P=C bond length is significantly longer than those observed in its analogues. The values of the three bond angles involved in the sp 2 hybridized carbon atom (C(1)) of the phosphaethylene are 133.4, 115.1 and 111.4° respectively, deviating significantly from the ideal value of 120°. In addition, although 5 sp 2 hybridized atoms (C(2), P(1), C(1), N and C(44)) are sequentially bonded in this molecule, no interaction is observed among the remaining pz orbits of these atoms on the string.

关键词： organophosphine phosphatheylene crystal structure

SURGICAL TREATMENT AND LATE RESULTS IN 1,226 COLORECTAL CANCER CASES

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

中华医学杂志(英文版) 1982年第7期95卷 490-490页

作者： zhou xi-geng Yu Bao-ming Shen Yao-xiang Department of Surgery Ruijin Hospital Shanghai Second Medical College Shanghai

1,226 cases of colorectal cancer were treated surgically between 1956-1978. 798 (65.09%) were rectal, 74.3% 0f which were located below the peritoneal reflection. Dukes’ C2 cases and cases with distant metastasis constituted 39.15% and Dukes’ A cases 9.22%. Resectability rate was 75.1% (77.6% for rectal cancer). 32.96% of 619 cases of rectal excision had restorative resection. 84.8% of the combined excision for extraperitoneal lesions in female patients were posterior pelvic exenteration. The overall operative mortality rate was 2.93%. Mortality rate of resection was, 1.73% and that of rectal resection 0.8% and curative rectal resection 0.63%. Follow up rate was 94.13%. The 5- and 10-year survival rates for rectal resection were 53.08% and 47.65%, for curative rectal resection 66.91% and 60.27%, and for Dukes’ A cases 98.05% and 96.39%. The 5- and 10-year survival rates for colonic resec- tion were 59.79% and 52.18%, for curative colonic resection 72.79% and 62.06%, and for Dukes’ A cases both 100%. Among factors affecting therapeutic results, local immunologic reaction of the host is also important, showing that the more lymphocytic infiltration in and around cancer, and the more follicular hyperplasia and sinus histiocytosis in regional lymph nodes the better the prognosis. Anal preservation in radical resection of rectal cancer and improving results in the treatment of extraperitoneal rectal cancer are discussed in detail.

关键词：

同方期刊数据库

A Flexible Smart Healthcare Platform Conjugated with Artificial Epidermis Assembled by Three‑Dimensionally Conductive MOF Network for Gas and Pressure Sensing

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第2期17卷 601-620页

作者： Qingqing zhou Qihang Ding Zixun geng Chencheng Hu Long Yang Zitong Kan Biao Dong Miae Won Hongwei Song Lin Xu Jong Seung Kim State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012People’s Republic of China Department of Chemistry Korea UniversitySeoul 02841Republic of Korea TheranoChem Incorporation Seoul 02856Republic of Korea

The rising flexible and intelligent electronics greatly facilitate the noninvasive and timely tracking of physiological information in telemedicine *** building bionic-sensitive moieties is vital for designing efficient electronic skin with advanced cognitive functionalities to pluralistically capture external ***,realistic mimesis,both in the skin’s three-dimensional interlocked hierarchical structures and synchronous encoding multistimuli information capacities,remains a challenging yet vital need for simplifying the design of flexible logic ***,we construct an artificial epidermal device by in situ growing Cu_(3)(HHTP)_(2) particles onto the hollow spherical Ti_(3)C_(2)T_(x) surface,aiming to concurrently emulate the spinous and granular layers of the skin’s *** bionic Ti_(3)C_(2)T_(x)@Cu_(3)(HHTP)_(2) exhibits independent NO_(2) and pressure response,as well as novel functionalities such as acoustic signature perception and Morse code-encrypted message ***,a wearable alarming system with a mobile application terminal is self-developed by integrating the bimodular senor into flexible printed *** system can assess risk factors related with asthmatic,such as stimulation of external NO_(2) gas,abnormal expiratory behavior and exertion degrees of fingers,achieving a recognition accuracy of 97.6%as assisted by a machine learning *** work provides a feasible routine to develop intelligent multifunctional healthcare equipment for burgeoning transformative telemedicine diagnosis.

关键词： Ti_(3)C_(2)T_(x)@Cu_(3)(HHTP)_(2)composites NO_(2)/pressure flexible sensors Health-monitoring Machine learning

Activation of Small Molecules by DyI_2 and Dy

在线全文

学校读者我要写书评

暂无评论

复旦学报（自然科学版） 2007年第5期46卷 568-页

作者： zhou xi-geng, Liu Rui-ping(Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Material, Fudan University, Shanghai 200433, China) Department of Chemistry Fudan University Shanghai Key Laboratory of Molecular Catalysis and Innovative Material Shanghai 200433

1 Results The reactivities of dysprosium diiodide and metallic dysprosium toward small molecules are *** instance,DyI2-induced silyl radical reactions are *** combination of dysprosium diiodide and dichloromethane can serve as an effective methylene transfer reagent for cyclopropanation of unfunctionalized alkenes beyond that possible with other metal-dichloromethane ***,we report that the combination of chlorosilane and metallic Dy can also serve as an effective prom...

关键词： activation small molecules DyI2

Mechanistic insight into the synergy between nickel single atoms and nanoparticles on N-doped carbon for electroreduction of CO2

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 327-336页

作者： Mingdong Sun Wenwen Guan Cailing Chen Chao Wu xiaoling Liu Biao Meng Tao Chen Yu Han Jun Wang Shibo xi Yu zhou State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical Engineering Nanjing Tech University Advanced Membranes and Porous Materials Center Physical Sciences and Engineering Division King Abdullah University of Science and Technology Institute of Sustainability for Chemicals Energy and Environment A*STAR (Agency for Science Technology and Research) College of Materials Science and Engineering Sichuan University

The synergy of single atoms （SAs） and nanoparticles （NPs） has demonstrated great potential in promoting the electrocatalytic carbon dioxide reduction reaction （CO2RR）;however,the rationalization of the SAs/NPs proportion remains one challenge for the catalyst ***,a Ni2+-loaded porous poly（ionic liquids）(PIL) precursor synthesized through the free radical self-polymerization of the ionic liquid monomer,1-allyl-3-vinylimidazolium chloride,was pyrolyzed to prepare the Ni,N co-doped carbon materials,in which the proportion of Ni SAs and NPs could be facilely modulated by controlling the annealing *** catalyst Ni-NC-1000 with a moderate proportion of Ni SAs and NPs exhibited high efficiency in the electrocatalytic conversion of CO2into *** Ni K-edge X-ray absorption near-edge structure （XANES） spectra and theoretical calculations were conducted to gain insight into the synergy of Ni SAs and *** charge transfer from Ni NPs to the surrounding carbon layer and then to the Ni SAs resulted in the electron-enriched Ni SAs active *** the electroreduction of CO2,the coexistence of Ni SAs and NPs strengthened the CO2activation and the affinity towards the key intermediate of*COOH,lowering the free energy for the potential-determining*CO2→*COOH step,and therefore promoted the catalysis efficiency.

关键词： Activation energy

Recent development in electrode design for wide-temperature supercapacitors

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2025年第1期68卷 96-117页

作者： Jianhong Liu Qiang zhou Yuxiao Lin xinsheng Zhao Guangmin zhou xiaoxiao Li School of Physics and Electronic Engineering Jiangsu Normal University Tsinghua-Berkeley Shenzhen Institute & Tsinghua Shenzhen International Graduate School Tsinghua University

An ever-increasing market demand has stimulated the soaring enthusiasm of researchers to develop wide-temperature supercapacitors(SCs). The active electrode is one of the most important parts of SC, which is directly related to the energy density,power transmission and long-term cyclability of the device in the wide-temperature environment. Compared with the SC electrodes aimed for room-temperature application, the SC electrodes for operating at wide-temperature scene often face greater challenges. In this review, the main challenges of SC electrodes under various temperature conditions, including low, high and cross-fade temperatures, are summarized. The relevant performance decay and failure mechanisms of wide-temperature SC electrodes are analyzed. In addition, this review deals with the recent studies and developments in robust wide-temperature SC electrodes with respect to the rational design of electrode structures and the exploitation of advanced active materials. Finally, the future directions for exploring reliable wide-temperature SCs are also proposed.

关键词： supercapacitor wide-temperature electrode design active materials