Now showing items 1516-1535 of 14235

    • C-2v-Symmetric C-60 Isomer in the Gas Phase: Experimental Evidence against Buckminsterfullerene (I-h-C-60) 

      Rui-Ting Chen; 陈睿婷; Sheng-Jun Zhou; 周胜军; Hua Liang; 梁华; Zhuo-Zhen Qian; 钱卓真; Jian-Mei Li; 李建梅; Qiao He; 何桥; Lei Zhang; 张磊; Yuan-Zhi Tan; 谭元植; Xiao Han; 韩晓; Zhao-Jiang Liao; 廖照江; Wei-Zheng Weng; 翁维正; Su-Yuan Xie; 谢素原; Rong-Bin Huang; 黄荣彬; Lan-Sun Zheng; 郑兰荪 (AMER CHEMICAL SOC, 2009-10-01)
      Pure non-IPR (isolated-pentagon-rule) C-60 isomer has rarely been investigated experimentally. The recently reported availability of (C60Cl8)-C-#1809 opens an avenue for experimental investigation of C-#18098(60), a ...
    • C-4 Cumulene and the Corresponding Air-Stable Radical Cation and Dication 

      Li, Yan; Mondal, Kartik Chandra; Samuel, Prinson P.; Zhu, Hongping; Orben, Claudia M.; Panneerselvam, Saravanan; Dittrich, Birger; Schwederski, Brigitte; Kaim, Wolfgang; Mondal, Totan; Koley, Debasis; Roesky, Herbert W.; 李彦; 朱红平 (WILEY-V C H VERLAG GMBH, 2014-04-14)
      A neutral C-4 cumulene 1 that includes a cyclic alkyl(amino) carbene (cAAC), its air-stable radical cation 1(.+), and dication 1(2+) have been synthesized. The redox property of 1(.+) was studied by cyclic voltammetry. EPR ...
    • C-H Bond Activation and Subsequent C(sp(2))-C(sp(3)) Bond Formation: Coupling of Bromomethyl and Triphenylphosphine in an Iridium Complex 

      Lin, Yumei; Xu, Hui; Gong, Lei; Bin Wen, Ting; He, Xu-Min; Xia, Haiping; 夏海平 (AMER CHEMICAL SOC, 2010-06)
      Treatment of HC CCH(OH)CH=CH2, with [IrHCl(CO)(PPh3)(3)]BF4 at room temperature afforded an iridacyclohexadiene, [Ir(CH=C(PPh3)CH=CHCH2)Cl(CO)(PPh3)(2)]BF4 (1). The reactivity of complex 1 had been investigated. Reaction ...
    • C-H center dot center dot center dot pi interaction and N center dot center dot center dot H-O hydrogen bonding in the chair-like p-tert-butylcalix[8]arene complex including four pyridine molecules 

      RONG-BIN HUANG; 黄荣彬; NAN-FENG ZHENG; 郑南峰; SU-YUAN XIE; 谢素原; LAN-SUN ZHENG; 郑兰荪 (KLUWER ACADEMIC PUBL, 2001-06)
      Crystal structure analysis shows that the p-tert-butylcalix[8]arene host and its four pyridine guests sit around an inversion center in the P2(1)/c crystal lattice. The monoclinic cell parameters and its volume are: a = ...
    • C-H center dot center dot center dot pi interactions in the [Co(N-(2-pyridylmethyl)-1,3-diaminopropane)(2-aminomethylpyridine)Cl](2+) system: syntheses, 2D NMR spectroscopy, X-ray structures and energy minimisations 

      Rong-Guang, L; Zhu, T; Xue, SF; Zhu, QJ; Jackson, WG; Wei, ZB; Long, LS; 龙腊生 (PERGAMON-ELSEVIER SCIENCE LTD, 2003)
      Ten asymmetric isomers exist for [Co(ptma)(ampy)Cl](2+) (ptma = N-(2-pyridylmethyl)-1,3-diaminopropane, ampy = 2-aminomethylpyridine) each involving unsymmetrical triamine and diamine ligands. Two of these, the m3 and m4 ...
    • C-H center dot center dot center dot pi interactions in the Co(N-(2-aminomethylpyridyl)ethylenediamine) (2-aminomethylpyridine)Cl (2+) system: syntheses, 2D NMR, X-ray structures and energy minimizations 

      Tao, Z.; Zhang, G. Y.; Luo, X. Q.; Xue, S. F.; Zhu, Q. J.; Jackson, W. G.; Wei, Z. B.; Long, L. S.; 龙腊生 (2004-03-10)
      Ten asymmetric isomers exist for [Co(pema)(ampy)Cl](2+) (pema = N-(2-aminomethylpyridyl)ethylenediamine, ampy = 2-aminomethylpyridine) which involve unsymmetrical triamine and diamine ligands. Four of these have been ...
    • C-H center dot center dot center dot pi interactions in the Co(N-(2-pyridylmethyl)-1,3-diaminopropane)(2-aminomethylpyridine)Cl (2+ ) system: syntheses, 2D NMR spectroscopy, X-ray structures and energy minimisations 

      Rong-Guang, L.; Zhu, T.; Xue, S. F.; Zhu, Q. J.; Jackson, W. G.; Wei, Z. B.; Long, L. S.; 龙腊生 (2003-12-01)
      Ten asymmetric isomers exist for [Co(ptma)(ampy)Cl](2+) (ptma = N-(2-pyridylmethyl)-1,3-diaminopropane, ampy = 2-aminomethylpyridine) each involving unsymmetrical triamine and diamine ligands. Two of these, the m3 and m4 ...
    • C-X(X=Cl,Br,I)键解离能作为烧结Au/AC催化剂再分散的描述因子及相关蕴意(英文) 

      段新平; 尹燕; 田学林; 柯金火; 温兆军; 郑建伟; 胡梦麟; 叶林敏; 袁友珠 (2016-10-15)
      负载型Au基催化剂在工业过程中具有非常广泛的潜在应用,如催化加氢/脱氢过程、精细化学品合成、能源催化转化及环境保护等过程,表现出很高的催化活性和选择性.Au基催化剂活性物种或活性中心基本由纳米粒子或化合物构成,但在应用过程中因Ostwald熟化效应或粒子迁移作用,尤其是高温高压等苛刻反应条件下,均随应用时间延长从小尺寸粒子逐渐长为大粒子,造成活性降低或完全失活,这也是负载型催化剂失活的最主要原因之一.其中因成本、稀缺等特性,负载型Au催 ...
    • C2H2 Treatment as a Facile Method to Boost the Catalysis of Pd Nanoparticulate Catalysts 

      Yan Dai; Shengjie Liu; Nanfeng Zheng; 郑南峰 (AMER CHEMICAL SOC, 2014-04-16)
      A facile method to boost the catalysis of Pd nanoparticulate catalysts by simple C2H2 treatment is developed. During the C2H2 treatment, Pd nanoparticles serve as active catalysts to polymerize C2H2 into transpolyacetylene. ...
    • C4 cumulene and the corresponding air-stable radical cation and dication 

      Li, Yan; Mondal, Kartik Chandra; Samuel, Prinson P.; Zhu, Hongping; Orben, Claudia M.; Panneerselvam, Saravanan; Dittrich, Birger; Schwederski, Brigitte; Kaim, Wolfgang; Mondal, Totan; Koley, Debasis; Roesky, Herbert W.; 李彦; 朱红平 (WILEY-V C H VERLAG GMBH, 2014 April)
      A neutral C4 cumulene 1 that includes a cyclic alkyl(amino) carbene (cAAC), its air-stable radical cation 1.+, and dication 12+ have been synthesized. The redox property of 1.+ was studied by cyclic voltammetry. EPR and ...
    • C60离子束撞击固体表面的坍塌与沉积(Ⅱ)扫描隧道显微研究 

      唐紫超; 蔡雄伟; 施财辉; 毛秉伟; 谢兆雄; 黄荣彬; 郑兰荪 (《物理化学学报》编辑部, 1997-10)
      [中文文摘]C6O最主要的特征之一就是它的结构稳定性.在以往的激光或碰撞解离研究中,均发现C60很难碎裂,具有很高的解离能[1].然而Gaber等发现当C6O离子以500-1000eV的能量沉积在固体表面时,C60原有的足球形封闭体结构被破坏,转化成非晶态的碳及石墨的微晶[2,3].最近我们在自制的仪器上,将经质量选择的C60离子束加速后撞击并沉积在固体表面.共焦显微拉曼光谱的表征结果显示,这些沉积物已不具有C60原有的足球形结构[4] ...
    • C64Cl8: A strain-relief pattern to stabilize fullerenes containing triple directly fused pentagons 

      Shan, Gui-Juan; Tan, Yuan-Zhi; Zhou, Ting; Zou, Xian-Mei; Li, Bo-Wei; Xue, Cong; Chu, Chen-Xu; Xie, Su-Yuan; Huang, Rong-Bin; Zhen, Lan-Sun; 谢素原; 黄荣彬; 郑兰荪 (John Wiley and Sons Ltd, 2012, 九月)
      Chlorinate me! An incomplete chlorination pattern in C64Cl 8 with an sp2-hybridized carbon atom remaining at the pentagon fusion represents a new model for exohedral stabilization of fullerenes containing triple directly ...
    • C64Cl8: A Strain-Relief Pattern to Stabilize Fullerenes Containing Triple Directly Fused Pentagons 

      Shan, Gui-Juan; Tan, Yuan-Zhi; Zhou, Ting; Zou, Xian-Mei; Li, Bo-Wei; Xue, Cong; Chu, Chen-Xu; Xie, Su-Yuan; Huang, Rong-Bin; Zhen, Lan-Sun; 郑兰荪 (WILEY-V C H VERLAG GMBH, 2012-09)
      Based on Euler’s theorems for mathematically predicting topological structures of convex polyhedral, Ih-symmetric C60 is the smallest fullerene that obeys the isolated pentagon rule (IPR).1 For other fullerenes with less ...
    • C64H4: Production, isolation, and structural characterizations of a stable unconventional fulleride 

      Wang, Chun-Ru; Shi, Zhi-Qiang; Wan, Li-Jun; Lu, Xin; 吕鑫; Dunsch, Lothar; Shu, Chun-Ying; Tang, Ya-Lin; Shinohara, Hisanori (AMER CHEMICAL SOC, 2006-04)
      Unconventional fullerenes are those smaller than C-60 or those intermediate between C-60 and C-70, which are not stable in structure as none of the unconventional fullerene isomers satisfying the "isolatedpentagonrule" ( ...
    • C70苄基衍生物的合成及其在钙钛矿太阳能电池中的应用 

      姚春瑞; 李姝慧; 邢舟; 邓林龙; 张前炎; 谢素原; 黄荣彬; 郑兰荪 (2019-06-27)
      富勒烯及其衍生物具有高的电子传输效率,是倒置平面异质结钙钛矿太阳能电池器件中优异的电子传输层材料(electron transport materials, ETMs)。其中,富勒烯C70通常存在众多的异构体产物,通过常规的手段难以实现有效分离,故关于结构明确的富勒烯衍生物对钙钛矿太阳能电池的影响,目前尚缺乏系统的研究和理解。本文基于对一种结构明确的C70衍生物2,5-(PhCH2)2C70的成功合成和分离,并将其作为电子传输材料构建平 ...
    • C72Cl4: A Pristine Fullerene with Favorable Pentagon-Adjacent Structure 

      Yuan-Zhi Tan; 谭元植; Ting Zhou; 周婷; Jian Bao; 包健; Gui-Juan Shan; 单桂娟; Su-Yuan Xie; 谢素原; Rong-Bin Huang; 黄荣彬; Lan-Sun Zheng; 郑兰荪 (AMER CHEMICAL SOC, 2010-12-08)
      A long-sought empty non-IPR fullerene, C-#11188(72), which is more stable than the sole IPR isomer in the fullerene[72] family, has been retrieved and crystallographically characterized as (C72Cl4)-C-#11188. Mass spectrometric ...
    • C76Cl34: High Chlorination of the Inherent Chiral Fullerene with a Helical Configuration 

      Hua Liang; 梁华; Yuan-Zhi Tan; 谭元植; Ting Zhou; 周婷; Zhen-Liang Chen; 陈振良; Su-Yuan Xie; 谢素原; Rong-Bin Huang; 黄荣彬; Lan-Sun Zheng; 郑兰荪 (AMER CHEMICAL SOC, 2010-04-15)
      As the smallest chiral fullerene in conformity with the Isolated Pentagon Rule (IPR), D-2-symmetric C-76 has been chlorinated with iodine monochloride to form C76Cl34, a highly chlorinated derivative. Its structure with ...
    • C_(2v)对称性簇Ru_2N_2的理论计算 

      夏飞; 林银钟; 许宗祥; 林敬东; 吕鑫; 廖代伟 (《物理化学学报》编辑部, 2003-12)
      [中文文摘]采用密度泛函(B3LYP)方法计算了Ru2的部分低能电子组态,得到Ru2基态的电子谱项为7Δu,平衡核间距re=0.228nm,振动频率ωe=338cm-1,离解能De=1.92eV.同时计算了具有C2v对称性的Ru2N2簇中氮的活化情况,得到了各个优化几何构型下的键参数和体系能量.计算结果表明,氮氮键的活化程度由Ru2对氮起反馈作用的轨道数目决定.一般来说,氮氮键活化越强,体系能量越高,在相同的活化程度下,自旋多重度高的体 ...
    • (C_(60))_2Ru_2Cl_4[Ph_2P(CH_2)_4PPh_2]配合物的合成 

      覃世辉; 吴振奕; 杨绳岩; 詹梦熊 (2008-10-20)
      在氮气氛中采用配体取代法合成了C60以σ-π配位方式与Ru形成的稳定η2型富勒烯双核钌金属配合物(C60)2Ru2Cl4[Ph2P(CH2)4PPh2],其结构经UV,IR,XPS,XRD和元素分析表征。
    • C_(60)[RuHCl(CO)(PPh_3)]_3配合物的合成和表征 

      吴振奕; 林永生; 程大典; 黄清之; 詹梦熊; 郑兰荪 (1999)