Temperature-Dependent Intramolecular Spin Coupling Interactions of a Flexible Bridged Nitronyl Nitroxide Biradical in Solution

Di Wang; Yingjie Ma; Bernd Wolf; Alexander I. Kokorin; Martin Baumgarten

首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Temperature-Dependent Intramolecular Spin Coupling Interactions of a Flexible Bridged Nitronyl Nitroxide Biradical in Solution

【24h】

Temperature-Dependent Intramolecular Spin Coupling Interactions of a Flexible Bridged Nitronyl Nitroxide Biradical in Solution

机译：柔性桥接氮硝基氧化物乙基溶液中的温度依赖性分子内自旋偶联相互作用

获取原文

获取原文并翻译 | 示例

掌桥外文数据库（机构版） >>

开具论文收录证明 >>

文献代查 >>

页面导航

摘要
著录项
相似文献
相关主题

摘要

A biradical consisting of two nitronyl nitroxide (NN) radicals bridged by diphenyl-hexaethylene glycol chain [phenyl- O -(CH_(2)CH_(2)O)_(6)-phenyl ( GBN1 )] was synthesized and investigated using electron paramagnetic resonance (EPR) spectroscopy in solution at different temperature ranges. The reversible temperature dependence behavior of spin coupling exchange is comprehensively reflected by the different lifetime of conformations due to a tumbling motion of the flexible hexaethylene glycol chain. The influences of different solvent on the exchange interactions between the radical entities are described by a two-conformational model, which was, for the first time, applied for di-NN molecule and revealed the thermodynamic parameters enthalpy and entropy (Δ H and Δ S ) of the conformational changes. The positive value of enthalpy indicates lower energy of the stretched form (as calculated) compared to the bent form. The transition enthalpy in polar MeCN is larger than in toluene and the positive entropy sign indicates more chain conformation options in the bent state. The magnetic properties of this molecule were investigated in solid state by magnetization studies and EPR spectroscopy.

机译：由二苯基 - 六亚乙二醇链桥接的两种氮氮氧化物（NN）基团组成的血管基，合成并研究了使用电子研究并研究了（6） - 苯基（GBN1）]不同温度范围溶液中的顺磁共振（EPR）光谱。由于柔性六亚乙二醇链的翻滚运动，自旋耦合交换的可逆温度依赖性行为被不同的构象寿命全面地反映。不同溶剂对自由基实体之间的交换相互作用的影响是由双构象模型描述的，这是第一次施加DI-NN分子并揭示了热力学参数焓和熵（ΔH和δS ）构象变化。与弯曲形式相比，焓的阳性值表明拉伸形式的较低能量（如计算）。极性Mecn的过渡焓大于甲苯，正熵标志表示弯曲状态下的较长链构象选择。通过磁化研究和EPR光谱研究该分子的磁性。

著录项

来源
《The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory》 |2018年第2期|共8页
作者
Di Wang; Yingjie Ma; Bernd Wolf; Alexander I. Kokorin; Martin Baumgarten;
展开▼
作者单位

Max Planck Institute for Polymer Research Ackermannweg 10 55128 Mainz Germany;

Max Planck Institute for Polymer Research Ackermannweg 10 55128 Mainz Germany;

Physikalisches Institut Goethe-University 60438 Frankfurt Germany;

N. Semenov Institute of Chemical Physics Russian Academy of Sciences Moscow Russia;

Max Planck Institute for Polymer Research Ackermannweg 10 55128 Mainz Germany;

展开▼
收录信息
原文格式 PDF
正文语种 eng
中图分类物理化学（理论化学）、化学物理学;
关键词

相似文献

外文文献
中文文献
专利

1. Temperature-Dependent Intramolecular Spin Coupling Interactions of a Flexible Bridged Nitronyl Nitroxide Biradical in Solution [J] . Di Wang, Yingjie Ma, Bernd Wolf, The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory . 2018,第2期

机译：柔性桥接氮硝基氧化物乙基溶液中的温度依赖性分子内自旋偶联相互作用
2. INTRAMOLECULAR SPIN-INTERACTIONS BETWEEN TWO NITRONYL NITROXIDE OR IMINO NITROXIDE RADICAL UNITS LINKED TO THIENO[2,3-B]THIOPHENE AND THIENO[2,3-B]THIENO[3',2'-D]THIOPHENE CHROMOPHORES [J] . Akita T., Kobayashi K. Tetrahedron . 1996,第20期

机译：连接到噻吩并[2,3-B]噻吩和噻吩[2,3-B]噻吩[3'，2'-D]噻吩色团的两个硝基亚硝基氧自由基或亚氨基亚硝基氧自由基单元之间的分子内自旋相互作用
3. Influence of Polarity and Ionic Strength on Intramolecular Spin Exchange in a Short Nitroxide Biradical, Containing Sulphur Atom in the Bridge [J] . Kokorin A. I, Mladenova-Kattnig B. Y., Gromov O. I, Applied Magnetic Resonance . 2018,第10期

机译：极性和离子强度对桥上短硝基氧化物荚膜分子内旋转交换的影响，桥梁含硫原子
4. The first 1D silver(Ⅰ) complex of nitronyl nitroxide with strong spin-spin interaction through silver (Ⅰ) ion [C] . Deqing ZHANG China-Japan joint symposium on conduction and photoconduction in organic solids and related phenomena;CJOSS-7 . 2001

机译：具有通过银离子的强自旋相互作用的第一个一维氧化亚硝酰银（Ⅰ）配合物
5. Study of Bridge Effects on Electronic Coupling of Donor-Bridge-Acceptor Biradical Complexes. [D] . Zhang, Jinyuan. 2016

机译：桥对供体-桥-受体双自由基配合物电子偶联的影响研究。
6. Structural factors controlling the spin-spin exchange coupling: EPR spectroscopic studies of strongly asymmetric trityl-nitroxide biradicals [O] . Yangping Liu, Frederick A. Villamena, Antal Rockenbauer, -1

机译：结构性因素控制自旋交换耦合：强烈不对称的三苯甲基氮氧双自由基的EpR光谱研究
7. Dynamics of intramolecular spin exchange interaction of a nitronyl nitroxide diradical in solution and on surfaces [O] . Lloveras Montserrat, Vega, Badetti, Elena, Veciana Miró, Jaume, 2016

机译：溶液中和表面上的二氧化氮氮自由基的分子内自旋交换相互作用的动力学
8. Photochemistry of Large-Ring 2-Phenylcycloalkanones in Various Environments.Intramolecular Para Coupling Products of Acyl Benzyl Biradicals [R] . Han, N., Lei, X., Turro, N. J. 1991

机译：不同环境下大环2-苯基环烷酮的光化学。酰基苄基双自由基的分子间偶联产物

Temperature-Dependent Intramolecular Spin Coupling Interactions of a Flexible Bridged Nitronyl Nitroxide Biradical in Solution

摘要

著录项

相似文献

相关主题

期刊订阅