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Synthesis, Crystal Structure and Magnetic Properties of Cobalt(II) Complex Involving Imino Nitroxide Radicals
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作者 王利亚 王玉芳 +1 位作者 马录芳 蒋凯 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2005年第3期283-286,共4页
A novel compound [Co(IM2-Py)2(NO3)]?(NO3) (IM2-Py = 2-(2?-pyridyl)-4,4,5,5- tetramethylimidazoline-1-oxyl) has been prepared and structurally characterized by X-ray diffrac- tion method. It crystallizes in orthorhom... A novel compound [Co(IM2-Py)2(NO3)]?(NO3) (IM2-Py = 2-(2?-pyridyl)-4,4,5,5- tetramethylimidazoline-1-oxyl) has been prepared and structurally characterized by X-ray diffrac- tion method. It crystallizes in orthorhombic, space group P212121 with a = 11.031(2), b = 13.492(3), c = 20.467(4) ?, V = 3046.0(11) ?3, C24H32CoN8O8, Mr = 619.51, Z = 4, Dc = 1.351 g/cm3, μ(MoKα) = 0.620 mm?1, F(000) = 1292, R = 0.0506 and wR = 0.0845 for 3752 observed reflections with I > 2σ(I). X-ray analysis reveals that the crystal structure consists of [Co(IM2- Py)2(NO3)]+ moiety and a NO3 anion. The cobalt(II) ion is six-coordinated with a distorted octahedral geometry. Tempera- ? ture dependence of susceptibility measurements show that there exist an antiferromagnetic inter- action in the compound. 展开更多
关键词 crystal structure imino nitroxide radical Co(II) complex magnetic properties
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Synthesis and Uncommon Structural Characterization of Novel Zinc and Cadmium Complexes with Imino Nitroxide Radical
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作者 王淑萍 高东昭 +2 位作者 廖代正 姜宗慧 阎世平 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2007年第4期472-476,共5页
Two novel complexes {[Zn(IM4py)2(tp)(H2O)]2H2O}. 1 and {[Cd(IM4py)2(tp)- (H2O)]1.25H2O},, 2 (IM4py = 2-(4'-pyridinyl)-4,4,5,5-tetramethylimidazoline-l-oxyl and tp = terephthalate dianion) have been sy... Two novel complexes {[Zn(IM4py)2(tp)(H2O)]2H2O}. 1 and {[Cd(IM4py)2(tp)- (H2O)]1.25H2O},, 2 (IM4py = 2-(4'-pyridinyl)-4,4,5,5-tetramethylimidazoline-l-oxyl and tp = terephthalate dianion) have been synthesized and characterized by elemental analyses, IR spectrum and single-crystal X-ray diffraction. Crystal data for complex I: monoclinic, space group C2/c, a = 20.648(7), b = 12.130(4), c = 14.036(4) A, β = 106.351(5)°, C32H42N6O9Zn, Mr = 720.09, V = 3373.3(2) A3, Z= 4, Dc = 1.418 g/cm^3μt(MoKα) = 0.790 mm^-1, F(000) = 1512, the final R = 0.0407 and wR = 0.0894 for 3480 independent reflections with Rint = 0.0432. Crystal data for complex 2: monoclinic, space group C2/c, a = 21.332(6), b = 12.063(3), c = 14.246(4) A, β = 106.704(4)°, C32H40.50N6O8.25Cd, Mr = 753.60, V= 3511.2(2) A^3, Z = 4, Dc = 1.426 g/cm^3,μ(MoKα) = 0.679 mm^--1, F(000) = 1554, the final R = 0.0419 and wR = 0.0961 for 3627 independent reflections with Rint = 0.0440. The framework structures of complexes 1 and 2 are 3-D networks via the hydrogen bonds among 1-D chains. The notable characteristics of the two complexes are that the coordination polyhedron of Zn(Ⅱ) adopts a rare distorted five-coordinate square pyramidal geometry in 1, and the Cd(Ⅱ) complex exhibits an unusual distorted seven-coordinate pentagonal bipyramid in 2. 展开更多
关键词 imino nitroxide radical zinc and cadmium complexes square pyramid pentagonal bipyramid
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Synthesis and Crystal Structure of an Imino Nitroxide Complex [Cd(IM2py)_2Cl_2]
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作者 王淑萍 刘翠格 +3 位作者 高东昭 廖代正 姜宗慧 闫世平 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2004年第11期1218-1221,共4页
The title compound [Cd(IM2py)2Cl2], where IM2py = 2-(2?-pyridinyl)-4,4,5,5-tetra- methylimidazoline-1-oxyl, has been prepared and structurally characterized by X-ray diffraction. It crystallizes in monoclinic, space g... The title compound [Cd(IM2py)2Cl2], where IM2py = 2-(2?-pyridinyl)-4,4,5,5-tetra- methylimidazoline-1-oxyl, has been prepared and structurally characterized by X-ray diffraction. It crystallizes in monoclinic, space group C2/c with a = 18.436(6), b = 9.255(3), c = 15.831(5) ? b = 100.274(5)? C24H32CdCl2N6O2, Mr = 619.86, V = 2658.0(14) ?, Z = 4, Dc = 1.549 g/cm3, m(MoKa) = 1.056 mm-1, F(000) = 1264, the final R = 0.0324 and wR = 0.0659 for 2725 independent reflections with Rint = 0.0378. The title complex exists as discrete mononuclear molecules, adopting a distorted octahedral [cis(Cl)-trans(py)] configuration with the cadmium(II) ion being bonded to two bidentate radicals and two chlorine atoms. There exist p???p stacking interactions between the adjacent parallel pyridyl rings of the complex in the ac plane. 展开更多
关键词 crystal structure imino nitroxide radical cadmium(II) complex
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1-Imino Nitroxide Pyrene, a Burst-type H^(+) Fluorescent Switch
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作者 Jun LI Hong Mei WANG +2 位作者 Hui Min MA De Qing ZHANG Shao Xiang XIONG 《Chinese Chemical Letters》 SCIE CAS CSCD 2005年第8期1125-1128,共4页
1-Imino nitroxide pyrene 1 has been characterized as a H^+ fluorescent switch. The effects of various interfering species, solvents and the irradiation of ultraviolet light on the fluorescence intensity of 1 are also... 1-Imino nitroxide pyrene 1 has been characterized as a H^+ fluorescent switch. The effects of various interfering species, solvents and the irradiation of ultraviolet light on the fluorescence intensity of 1 are also investigated. 1 fluoresces weakly in the 85% ethanol media containing no more than 4.5x10-5 mol/L of H^+ (HCI), but can produce a burst increase of about 4 times in the fluorescence intensity when the concentration of H+ is increased to or over 4.9×10^-5mol/L. The extremely sharp response of 1 to H+ occurs only within such a narrow concentration range. Moreover, the decrease of H^+ concentration through adding sodium hydroxide causes the fluorescence quenching, suggesting that 1 may serve as a fluorescent switch for monitoring the concentration change of H+ around the point of 4.5×10^-5 mol/L. 展开更多
关键词 Fluorescent switch l-imino nitroxide pyrene H^+
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Exchange Interaction of a Novel Heterospin Polynuclear Complex Containing Transition Metals and Imino Nitroxide Radicals: {[(CuL)Ni(IM-2Py)_2](ClO_4)_2}_2·2H_2O
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作者 刘志亮 李立存 +2 位作者 廖代正 姜宗慧 阎世平 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2003年第2期133-138,共6页
A novel heterospin complex {[(CuL)Ni(IM 2Py) 2](ClO 4) 2} 2·2H 2O (L=2,3 dioxo 5,6:14,15 dibenzo 1,4,8,12 tetraazacyclo pentadeca 7,12 diene, IM 2Py=2 (2′ pyridyl) 4,4,5,5 tetra^methyl 4,5 d... A novel heterospin complex {[(CuL)Ni(IM 2Py) 2](ClO 4) 2} 2·2H 2O (L=2,3 dioxo 5,6:14,15 dibenzo 1,4,8,12 tetraazacyclo pentadeca 7,12 diene, IM 2Py=2 (2′ pyridyl) 4,4,5,5 tetra^methyl 4,5 dihydro 1 H imidazoline 1 oxyl) has been synthesized and its crystal structure was determined by X ray diffraction analysis. In order to interpret the exchange interaction of this asymmetric heterospin system, a theoretical model has been established. Using this theoretical model the magnetic susceptibility data have been fitted and lead to coupling constant values equal to 1 4 cm -1 (Ni Rad) and -38 0 cm -1 (Ni Cu), respectively. 展开更多
关键词 crystal structure imino nitroxide radical heterospin complex exchange interaction
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2-(4-Pyridyl)imino nitroxide-tetraphenylporphyrin zinc(Ⅱ):A chemosensing ensemble for nicotine
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作者 HAN HuiFei ZHANG GuanXin WANG HongMei 《Chinese Science Bulletin》 SCIE EI CAS 2012年第14期1609-1611,共3页
2-(4-Pyridyl)imino nitroxide and tetraphenylporphyrin zinc(Ⅱ) formed a stable complex by noncovalent bonding in a nonpolar solution.Nicotine displaced 2-(4-pyridyl)imino nitroxide when it was added to a solution of 2... 2-(4-Pyridyl)imino nitroxide and tetraphenylporphyrin zinc(Ⅱ) formed a stable complex by noncovalent bonding in a nonpolar solution.Nicotine displaced 2-(4-pyridyl)imino nitroxide when it was added to a solution of 2-(4-pyridyl)imino nitrox-ide-tetraphenylporphyrin zinc(Ⅱ).The fluorescence intensity of tetraphenylporphyrin zinc(Ⅱ) was altered by sequentially addition of 2-(4-pyridyl)imino nitroxide and nicotine.This was used to develop a new method for detection of nicotine. 展开更多
关键词 氮氧化物 吡啶基 尼古丁 卟啉锌 氨基氮 化学传感 亚氨基 非共价键
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铜(Ⅱ)氮氧自由基配合物铁磁耦合机理的理论研究
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作者 孙友敏 刘成卜 王若曦 《化学学报》 SCIE CAS CSCD 北大核心 2004年第23期2303-2307,共5页
用密度泛函理论结合对称性破损态方法对氮氧双自由基以及铜 (Ⅱ ) 氮氧自由基配合物的磁耦合常数进行了计算 .结果表明铜 (Ⅱ ) 氮氧自由基配合物为铁磁耦合 .对配合物磁轨道进行了分析 ,表明体系的铁磁耦合作用主要来自于Cu离子的轨... 用密度泛函理论结合对称性破损态方法对氮氧双自由基以及铜 (Ⅱ ) 氮氧自由基配合物的磁耦合常数进行了计算 .结果表明铜 (Ⅱ ) 氮氧自由基配合物为铁磁耦合 .对配合物磁轨道进行了分析 ,表明体系的铁磁耦合作用主要来自于Cu离子的轨道与自由基的π 轨道正交 .自旋密度分布分析显示 :在氮氧自由基与金属铜两个自旋耦合片的自旋耦合主要来自于中心Cu离子的轨道电子向氮氧自由基上的π 轨道的电子转移 。 展开更多
关键词 氮氧自由基 铜(Ⅱ) 配合物 自旋密度 密度泛函理论 离子 电子转移 自旋耦合 作用 分析
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稳定自由基-六氟乙酰丙酮铜配合物的合成、结构和磁性研究
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作者 张有娟 朱会敏 +1 位作者 郑夏君 陈静 《安阳师范学院学报》 2012年第2期16-19,共4页
合成了一个单臂氮氧自由基配位化合物[Cu(hfac)2(IM2Py)](hfac=六氟乙酰丙酮,IM2Py=2-(2-吡啶基)-4,4,5,5-四甲基咪唑啉-1-氧基自由基),并对它进行了结构和磁性表征。X-射线单晶结构分析表明,配合物[Cu(hfac)2(IM2Py)]属于三斜晶系,Pī... 合成了一个单臂氮氧自由基配位化合物[Cu(hfac)2(IM2Py)](hfac=六氟乙酰丙酮,IM2Py=2-(2-吡啶基)-4,4,5,5-四甲基咪唑啉-1-氧基自由基),并对它进行了结构和磁性表征。X-射线单晶结构分析表明,配合物[Cu(hfac)2(IM2Py)]属于三斜晶系,Pī空间群,每个铜离子通过与二个六氟乙酰丙酮的四个氧原子、吡啶环上的一个氮原子和咪唑环上的一个氮原子配位而处于一个八面体构型中。变温磁化率表明分子内铜离子与氮氧自由基之间在高温下存在铁磁偶合作用,同时发现分子间存在弱的铁磁偶合作用。 展开更多
关键词 单臂氮氧自由基 铜配合物 晶体结构 磁性质
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Synthesis and Crystal Structures of Two Metal-Radical Complexes
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作者 Youjuan Zhang Caiwen Zhang Jing Chen 《Open Journal of Inorganic Chemistry》 2021年第3期85-94,共10页
Two new M(II)-radical complexes [M(hfac)<sub>2</sub>(IM-<span style="font-size:10.0pt;font-family:;" "=""><i></i></span><i>o<span style="font-... Two new M(II)-radical complexes [M(hfac)<sub>2</sub>(IM-<span style="font-size:10.0pt;font-family:;" "=""><i></i></span><i>o<span style="font-size:10.0pt;font-family:;" "=""></span></i>-QN)] (M = Ni(<strong>1</strong>), Zn(<strong>2</strong>);IM-<span style="white-space:normal;font-size:10pt;font-family:;" "=""><i></i></span><i><span style="white-space:normal;">o</span><span style="white-space:normal;font-size:10pt;font-family:;" "=""></span></i>-QN = 4'-quinoxalinyl-substituted imino nitroxide;<span style="font-family:" font-size:13.3333px;white-space:normal;"=""><i></i></span><i>hfac<span style="font-family:" font-size:13.3333px;white-space:normal;"=""></span></i> = hexafluoroa-cetylacetonate) have been synthesized and characterized by X-ray diffraction analysis, element analyses, IR and UV-Visible spectroscopy. X-ray analysis reveal that the structures of both complexes are similar configuration and differently spatial symmetries. The complex <strong>1</strong> crystallizes in the triclinic <span style="font-family:" font-size:13.3333px;white-space:normal;"=""><i></i></span><i>P<span style="font-family:" font-size:13.3333px;white-space:normal;"=""></span></i>ī space group with the respective cell parameters: <span style="font-family:" font-size:13.3333px;white-space:normal;"=""><i></i></span><i>a<span style="font-family:" font-size:13.3333px;white-space:normal;"=""></span></i> = 9.1189(18) <span style="color:#4F4F4F;font-family:-apple-system, " font-size:16px;white-space:normal;background-color:#f7f7f7;"=""><span style="color:#4F4F4F;font-family:-apple-system, "font-size:16px;white-space:normal;background-color:#F7F7F7;">&#197</span></span>, <span style="font-family:" font-size:13.3333px;white-space:normal;"=""><i></i></span><i>b<span style="font-family:" font-size:13.3333px;white-space:normal;"=""></span></i> = 9.836(2) <span style="color:#4F4F4F;font-family:-apple-system, " font-size:16px;white-space:normal;background-color:#f7f7f7;"=""><span style="color:#4F4F4F;font-family:-apple-system, "font-size:16px;white-space:normal;background-color:#F7F7F7;">&#197</span></span>, <span style="font-family:" font-size:13.3333px;white-space:normal;"=""><i></i></span><i>c<span style="font-family:" font-size:13.3333px;white-space:normal;"=""></span></i> = 18.537(4) <span style="color:#4F4F4F;font-family:-apple-system, " font-size:16px;white-space:normal;background-color:#f7f7f7;"=""><span style="color:#4F4F4F;font-family:-apple-system, "font-size:16px;white-space:normal;background-color:#F7F7F7;">&#197</span></span>, <span style="font-family:" font-size:13.3333px;white-space:normal;"=""><i></i></span><i>α<span style="font-family:" font-size:13.3333px;white-space:normal;"=""></span></i> = 75.92(3)<span style="color:#4F4F4F;font-family:-apple-system, " font-size:16px;white-space:normal;background-color:#ffffff;"="">°</span>, <span style="font-family:" font-size:13.3333px;white-space:normal;"=""><i></i></span><i>β<span style="font-family:" font-size:13.3333px;white-space:normal;"=""></span></i>= 81.95(3)<span style="color:#4F4F4F;font-family:-apple-system, " font-size:16px;white-space:normal;background-color:#ffffff;"="">°</span>, <span style="font-family:" font-size:13.3333px;white-space:normal;"=""><i></i></span><i>γ<span style="font-family:" font-size:13.3333px;white-space:normal;"=""></span></i> = 69.32(3)<span style="color:#4F4F4F;font-family:-apple-system, " font-size:16px;white-space:normal;background-color:#ffffff;"="">°</span>, <span style="font-family:" font-size:13.3333px;white-space:normal;"=""><i></i></span><i>V<span style="font-family:" font-size:13.3333px;white-space:normal;"=""></span></i> = 1506.1(5) <span style="color:#4F4F4F;font-family:-apple-system, " font-size:16px;white-space:normal;background-color:#f7f7f7;"=""><span style="color:#4F4F4F;font-family:-apple-system, "font-size:16px;white-space:normal;background-color:#F7F7F7;">&#197</span></span><sup>3</sup>, <span style="font-family:" font-size:13.3333px;white-space:normal;"=""><i></i></span><i>Z<span style="font-family:" font-size:13.3333px;white-space:normal;"=""></span></i> = 2, whereas the complex <strong>2</strong> is in monoclinic C2/c space group with the respective cell parameters: <span style="font-family:" font-size:13.3333px;white-space:normal;"=""><i></i></span><i>a<span style="font-family:" font-size:13.3333px;white-space:normal;"=""></span></i> = 26.996(5) <span style="color:#4F4F4F;font-family:-apple-system, " font-size:16px;white-space:normal;background-color:#f7f7f7;"=""><span style="color:#4F4F4F;font-family:-apple-system, "font-size:16px;white-space:normal;background-color:#F7F7F7;">&#197</span></span>, <span style="font-family:" font-size:13.3333px;white-space:normal;"=""><i></i></span><i>b<span style="font-family:" font-size:13.3333px;white-space:normal;"=""></span></i> = 9.5223(19) <span style="color:#4F4F4F;font-family:-apple-system, " font-size:16px;white-space:normal;background-color:#f7f7f7;"=""><span style="color:#4F4F4F;font-family:-apple-system, "font-size:16px;white-space:normal;background-color:#F7F7F7;">&#197</span></span>, <span style="font-family:" font-size:13.3333px;white-space:normal;"=""><i></i></span><i>c<span style="font-family:" font-size:13.3333px;white-space:normal;"=""></span></i> = 23.961(5) <span style="color:#4F4F4F;font-family:-apple-system, " font-size:16px;white-space:normal;background-color:#f7f7f7;"=""><span style="color:#4F4F4F;font-family:-apple-system, "font-size:16px;white-space:normal;background-color:#F7F7F7;">&#197</span></span>, <span style="font-family:" font-size:13.3333px;white-space:normal;"=""><i></i></span><i>α<span style="font-family:" font-size:13.3333px;white-space:normal;"=""></span></i> = 90.00<span style="color:#4F4F4F;font-family:-apple-system, " font-size:16px;white-space:normal;background-color:#ffffff;"="">°</span>, <span style="font-family:" font-size:13.3333px;white-space:normal;"=""><i></i></span><i>β<span style="font-family:" font-size:13.3333px;white-space:normal;"=""></span></i>= 91.07(3)<span style="color:#4F4F4F;font-family:-apple-system, " font-size:16px;white-space:normal;background-color:#ffffff;"="">°</span>, <span style="font-family:" font-size:13.3333px;white-space:normal;"=""><i></i></span><i>γ<span style="font-family:" font-size:13.3333px;white-space:normal;"=""></span></i>= 90.00<span style="color:#4F4F4F;font-family:-apple-system, " font-size:16px;white-space:normal;background-color:#ffffff;"="">°</span>, <span style="font-family:" font-size:13.3333px;white-space:normal;"=""><i></i></span><i>V<span style="font-family:" font-size:13.3333px;white-space:normal;"=""></span></i> = 6158(2) <span style="color:#4F4F4F;font-family:-apple-system, " font-size:16px;white-space:normal;background-color:#f7f7f7;"=""><span style="color:#4F4F4F;font-family:-apple-system, "font-size:16px;white-space:normal;background-color:#F7F7F7;">&#197</span></span><sup>3</sup>, <span style="font-family:" font-size:13.3333px;white-space:normal;"=""><i></i></span><i>Z<span style="font-family:" font-size:13.3333px;white-space:normal;"=""></span></i> = 8. In two new M(II)-radical complexes, the central M(II)(Ni(<strong>1</strong>) and Zn(<strong>2</strong>)) ions are coordinated by four oxygen atoms from two hfac and two nitrogen atoms from imino nitroxide radicals to form a distorted octahedron. Additionally, the optical properties and thermal analysis of the two complexes are reported. 展开更多
关键词 M(II)-Radical Complex quinoxalinyl-substituted imino nitroxide SYNTHESIZED Characterized
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铜(Ⅰ)、银(Ⅰ)氮氧自由基配合物磁构效应的理论研究
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作者 黄俭根 周光培 +1 位作者 应少明 罗秋燕 《井冈山大学学报(自然科学版)》 2010年第1期28-35,共8页
采用密度泛函结合对称性破损(DFT-BS)方法,研究了铜(Ⅰ)、银(Ⅰ)氮氧自由基配合物磁构效应。计算结果表明,在考察改变两个氮氧自由基二面角(θ)而引起磁交换偶合常数(J)的变化时发现,将AgⅠ和CuⅠ配合物中氮氧自由基的正交排列逐渐转为... 采用密度泛函结合对称性破损(DFT-BS)方法,研究了铜(Ⅰ)、银(Ⅰ)氮氧自由基配合物磁构效应。计算结果表明,在考察改变两个氮氧自由基二面角(θ)而引起磁交换偶合常数(J)的变化时发现,将AgⅠ和CuⅠ配合物中氮氧自由基的正交排列逐渐转为平行排列,最终都实现由铁磁性偶合转变为反铁磁性偶合,但转变的过程并不完全相同。分子轨道和自旋集居数分析都很好解释了计算结果。分析还表明,AgⅠ和CuⅠ两个结构相似的配合物,磁构效应之所以不同,实际上是由它们的磁偶合机理不同所导致。 展开更多
关键词 氮氧自由基 磁构效应 密度泛函理论 对称破损态方法
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