两种离子型铱配合物的合成、光物理性质及对OH-的检测

以两种2,2’-联吡啶衍生物为中性配体，2-(3-氟苯基)吡啶为环金属配体，合成了两种新型的离子型Ir(Ⅲ)配合物Ir1和Ir2。利用核磁、质谱和晶体结构分析确认了配合物Ir1和Ir2的结构。配合物Ir1和Ir2在CH2Cl2溶液中的最大发射波长分别为570和528 nm，为橙红光和黄光。两种配合物在无氧CH2Cl2溶液中的量子产率分别为0.88和0.57，磷光寿命分别为2.43和2.40 μs。通过理论计算详细讨论了中性配体的取代基种类对其光谱性质的影响。在配合物Ir1的DMSO/H2O溶液中加入OH^-后，其发射峰强度提高了近100倍，溶液的发光颜色由红色变为明亮的绿色，检出限为8.47×10^-6 mol/L。机理研究表明，OH^-取代了Ir1的中性配体上的溴取代基，形成了新的含有羟基的配合物，从而改变了Ir1的光谱特性，实现对OH^-的高选择性和高灵敏度检测。     

一种中性铱磷光配合物的合成及表征

合成了一种含有苯基吡啶单元的中性铱磷光配合物Ir(dfppy)2(fubudio) (dfppy:2,4-二氟苯基吡啶;fubudio:1-(2-糠酰)-1,3-丁二酮)。通过元素分析、核磁共振谱(¹H-NMR和¹³C-NMR)、质谱和红外光谱等表征手段确认了它的组成和化学结构。并采用紫外-可见吸收光谱和光致发光光谱对其光物理性质进行测试,常温下,其最大发射位于569 nm处,显示黄绿光发射。     

黄光铱配合物Ir(dmppy)2(popy)的合成及光物理性能研究

设计合成了一种新的中性铱磷光配合物Ir(dmppy)2(popy)，该配合物以2,4-二(3,5-二甲基苯基)吡啶为环金属配体，2-(2-羟基苯基)吡啶为辅助配体。通过核磁共振氢谱和碳谱(¹H-NMR、¹³C-NMR)确证了配合物的化学结构，采用光致发光光谱和紫外可见光谱研究了配合物的光物理性能,采用热分析研究了配合物的热稳定性。该配合物在二氯甲烷中的最大发射波长为575 nm，为黄光发射铱磷光配合物。     

两种新型铱(Ⅲ)配合物的合成与性质研究

分别以2-苯基吡啶(ppy)为第一配体,以1-苯基-1,3-丁二酮(phbd),1-苯基-3-甲基-4-苯甲酰基-吡唑啉酮-5(pmbp)为第二配体合成了两个新的铱配合物Ir(ppy)2(pmbp)、Ir(ppy)2(phbd),通过红外光谱、元素分析和核磁共振对其化学组成进行了结构表征,表征结果与理论吻合良好;配合物在紫外吸收光谱图上的290~310 nm处出现了强的配体自旋允许的单重态π-π*跃迁吸收峰,在400~460 nm处出现了配合物分子内金属铱到配体的单重态和三重态电荷跃迁吸收峰(1MLCT和3MLCT);同时配合物Ir(ppy)2(pmbp)、Ir(ppy)2(phbd)在荧光光谱上522、518 nm处出现了强的绿光发射。     

一种离子型铱磷光配合物的合成及表征

以2-苯基吡啶(ppy)为环金属配体、4,4''-二叔丁基-2,2''-二吡啶(Dtbbpy)为N^N辅助配体,PF6^-为对阴离子,合成了一种离子型磷光配合物[Ir(ppy)2(Dtbbpy)]⁺PF6^-,产率为91.0%。通过元素分析(EA)、红外光谱(IR)、核磁共振谱(¹H-NMR和¹³C-NMR)和质谱(MS)对其组成和化学结构进行了确认和表征。采用紫外可见光谱(UV-Vis)和光致发光光谱(PL)研究了其光物理性能,该配合物在二氯甲烷中的最大发射波长为557 nm,属于黄绿光发射离子型铱磷光配合物。     

铱磷光配合物Ir(dfppy)2(phbudio)的合成及表征

以氯桥二聚体[Ir(dfppy)2(μ-Cl2)]2、1-苯基-1,3-丁二酮为原料合成了一种铱磷光配合物Ir(dfppy)2(phbudio)，产率86.0%，并通过元素分析、核磁共振谱、质谱和红外光谱表征确认了目标产物的化学结构。通过紫外-可见吸收以及荧光光谱对其光物理性质进行测试，其常温最大发射位于522 nm处，显示发射强烈的绿光，初步推测该铱磷光配合物发射可能来自金属铱到环金属配体和辅助配体的电荷转移(MLCT)跃迁。     

两种嘧啶基噻吩类磷光铱配合物的合成及表征

以2-嘧啶基噻吩(pymbt,L1)和2-嘧啶基苯并噻吩(pymbtp,L2)作为环金属化主配体,二(二苯基磷酰)亚胺(Htpip)作为O^O型辅助配体,合成了两种新型磷光金属铱配合物(pymbt)2Ir(tpip) (Ir1)和(pymbtp)2Ir(tpip) (Ir2)。通过核磁共振氢谱、质谱和元素分析对其进行了结构表征,用紫外-可见吸收光谱和荧光发射光谱进行了光物理性质的研究。结果表明,铱配合物Ir1和Ir2在溶液中的最大发射峰分别为563 nm和619 nm,为橙黄光和红光。在无水无氧二氯甲烷溶液中相对量子效率分别为6.3%和10.1%,磷光寿命为0.50 ms和0.63 ms。同时采用含时密度泛函理论(TDDFT)对配合物Ir1和Ir2的最低能量电子跃迁进行了计算,结果与实验测得的相应光谱数据对应的趋势相符。     

离子型黄光铱磷光配合物的合成、结构及光物理性能研究

设计合成了一种新的离子型铱配合物[Ir(dmpmq)2(dtbpy)]PF6,该配合物以2-(3,5-二甲基苯基)-4-甲基喹啉为主配体,4,4''-二叔丁基-2,2''-联吡啶为辅助配体,六氟磷酸根为阴离子。通过核磁共振谱(¹H-NMR,¹³C-NMR)、质谱(MS)、单晶X射线衍射(XRD)确认了配合物的化学结构,采用光致发光光谱(PL)和紫外可见光谱(UV-Vis)对其光物理性能进行了研究。结果表明,该配合物为单斜晶系,空间群为C2/c;配合物在二氯甲烷溶液中的最大发射波长为579 nm,为典型的黄光发射离子型铱磷光配合物。     

一种联吡啶类铱配合物的合成及光物理性能测试

以2-(2,4-二氟苯基)吡啶为主配体,2,2''-联吡啶为辅助配体,设计合成出了一种联吡啶铱配合物[Ir(dfppy)2(bpy)]PF6 (dfppy = 2-(2,4-二氟苯基)吡啶,bpy = 2,2''-联吡啶)。通过元素分析、质谱、核磁共振谱、红外光谱和X射线单晶测试表征了配合物的化学结构,通过光致发光光谱和紫外可见光谱研究了配合物的光物理性能。结果表明,配合物的最大发射波长为515 nm,发光颜色为绿光。     

铱配合物(Ir(ppy)2(SFO))的合成及结构表征

在乙二醇单乙醚介质中,将二聚体Ir2(μ-Cl2)(ppy)4和辅助配体2-噻吩甲酰三氟丙酮(SFO)在碱性条件下,加热回流反应,一步生成了铱配合物Ir(ppy)2(SFO),产率85.2%。采用核磁共振(¹H-NMR、¹³C-NMR)和质谱等分析表明产物为目标配合物。     

新型的治疗阿尔茨海默氏症药物(1-二甲基磷酰基-2,2,2-三氯)-乙基-1-醇烟酸醋对体外神经细胞的作用

目的: 观察本实验室合成的一种治疗阿尔茨海默氏症(AD)的药物(1-二甲基磷酰基-2, 2, 2 -三氯)-乙基^-1-醇烟酸醋(NMF),对体外培养的皮层神经细胞活性的影响以及对海人藻酸(KA)所致的神经损伤的保护作用。方法: 采用体外培养皮层神经元的方法,解剖分离 15 d胚胎小鼠皮层神经细胞, 接种于 96孔板,48 h 后加药并培养 72 h,以 MIT 法 观察 NMF 对小鼠皮层神经细胞活性的影响;同时将接种于 24 孔板的细胞预先给予 NMF,d 3 时加或不加KA处理后,以台盼蓝染色鉴别并计数死、活细胞,可得出细胞的存活率。结果: NMF 明显促进胎鼠皮层神经元活性,其中 NMF1、0. 1、10nmol·L^-1促进神经元活性增殖率分别高达 34.7%、37.4%、36. 7%, NMF 明显促进正常胎鼠皮层神经元存活卒,与对照组比较,10nmol·L^-1 NMF 对皮层神经元的存活率分别提高 39.3%、73.5%。 NMF能显著 对抗 KA 所致的神经元损伤,与 KA 损伤组相比, NMF0.1、10、10nmol·L^-1对损伤皮层神经元的保护率分别为 77.30%、80.10%、84.15%。结论: NMF 明 显促进胎鼠皮层神经元的洁性、提高正常皮层神经元,的存活卒,并能有效地保护KA所致的神经元损伤,提示 NMF 是一种很有潜力的治疗 AD 的药物。     

Three-Dimensional Growth of Coherent Ferrite in Austenite: A Molecular Dynamics Study

Coherent second phase often exhibits anisotropic morphology with specifi c orientations with respect to both the second and the matrix phases. As a key feature of microstructure, the morphology of the coherent particles is essential for understanding the second-phase strengthening eff ect in various industrial alloys. This letter reports anisotropic growth of coherent ferrite from austenite matrix in pure iron based on molecular dynamics simulation. We found that the ferrite grain tends to grow into an elongated plate-like shape, independent of its initial confi guration. The fi nal shape of the ferrite is closely related to the misfi t between the two phases, with the longest direction and the broad facet of the plate being, respectively, consistent with the best matching direction and the best matching plane calculated via the Burgers vector content(BVC) method. The strain energy calculation in the framework of Eshelby's inclusion theory verifi es that the simulated orientation of the coherent ferrite is energetically favorable. It is anticipated that the BVC method will be applicable in analysis of anisotropic growth and morphology of coherent second phase in other phase transformation systems.     

Rheology Feature of Simple Metal Melt

The rheology feature of Sb, Bi melt and alloys was studied using coaxial cylinder high-temperature viscometer. The results showed that the curve of torsion-rotational speed for Sb melt presents a linear relation in all measured temperature ranges, whereas for the Bi melt, the curve presents obvious non-Newtonian feature within the low temperature range and at relative high shear stress. The rheology feature of Sb80Bi20 and Sb20Bi80 alloy melts was well correlated with that of Sb and Bi, respectively. It is considered that the rheology behavior of Sb melt plays a crucial role in Sb80Bi20 alloy and that of Bi melt plays a crucial role in Sb20Bi80 alloy.     

Effect of Short-Time Aging on the Pitting Corrosion Behavior of a Novel Lean Duplex Stainless Steel 2002

The effect of short-time aging in the temperature range between 400 and 1000 °C on the pitting corrosion behavior and mechanical property of a novel lean duplex stainless steel(LDSS) 2002 was investigated through the potentiostatic critical pitting temperature(CPT) tests and the Charpy impact tests. Both the pitting corrosion resistance and the toughness of aged specimens degraded due to the precipitation of detrimental secondary phases and the most significant reduction of CPT and impact energy emerged at 650 °C concurrently. The CPT of LDSS 2002 specimen aged at 650 °C decreased by 28 °C, and the impact energy dropped from 69 to 29 J/cm~2 compared with the solution-annealed sample. Transmission electron microscopy characterization showed that the main precipitates in LDSS 2002 were Cr_2N and M_(23)C_6 along the ferrite–austenite grain boundaries.     

INTRODUCTION TO PATENTS

The invention provides a method of making a mold which can reduce SOx generation rate while preventing decrease in hardening rate in the case of using sulfuric acid for a hardener composition. The method has a mixture step in which fire-resistant particles, a hardener composition and a binder composition are mixed to obtain a composition for a mold. The hardener composition contains sulfuric acid. In the mixture step, sodium carbonate is added. A molar ratio of the sulfuric acid to the sodium carbonate is 0.5 or more and 4.0 or less.     

China Foundry Week 2014

China Foundry Week, hosted by the Foundry Institution of Chinese Mechanical Engineering Society （FICMES） each year, is a large academic event in China. It is one of the ten high-impact activities sponsored by the Chinese Mechanical Engineering Society.     

17th Conference of Hydrodynamic and Electromechanical Control Engineering Call for papers

正1.Contents In order to promote the academic exchanges and technical communication of the research in the field of fluid power transmission and control,fluid control engineering specialized committee of the Chinese Society of Theoretical and Applied Mechanics will hold the 17th Conference of Hydrodynamic and Electromechanical Control Engineering on July 27-29,2014 in Tibet,Lhasa city.     

Information for Contributors

正The Transactions of Nonferrous Metals Society of China,founded in 1991 and sponsored by The Nonferrous Metals Society of China,is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology,including mineral processing,extraction metallurgy,metallic materials and heat treatments,metal working,physical metallurgy,powder metallurgy,with the emphasis     

Preface

<正>We are pleased to present this Special Issue of Transactions of Nonferrous Metals Society of China containing selected papers from the First Asian Conference on Aluminum Alloys(ACAA-2013),held in Beijing,China,13–17 October 2013.This conference has been initiated,with approval of     

Information for Contributors

The Transactions of Nonferrous Metals Society of China, founded in 1991 and sponsored by The Nonferrous Metals Society of China, is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology, including mineral processing, extraction metallurgy, metallic materials and heat treatments, metal working, physical metallurgy, powder metallurgy, with the emphasis on fundamental science. It is the unique preeminent publication in English for scientists, engineers, under/post-graduates on the field of nonferrous metals industry. This journal is covered by many famous abstract/index systems and databases such as SCI Expanded, Ei Compendex Plus, 1NSPEC, CA, METADEX, AJ and JICST.