一种含Pr(Ⅲ)配合物的合成、晶体结构及光物理性能研究

采用水热方法合成了1种Pr(Ⅲ)配合物,[Pr(2,5-pdc)(Ac)(H2O)·2H2O]n(2,5-pdc=2,5-吡啶二羧酸根),通过X射线衍射确定了配合物的晶体结构.结果表明,该配合物为单斜晶系,P2(1)/c空间群.在配合物中,Pr(Ⅲ)离子是9配位的,通过醋酸根和2,5-吡啶二羧酸根将配合物连成3D网状结构.室温下测定了配合物晶体粉末的IR光谱,UV-Vis-NIR光谱以及可见区和近红外区的发射光谱.重点研究配合物的发光性能,该配合物在近红外区表现出Pr(Ⅲ)离子的特征发射带,与Pr(Ⅲ)离子的理论发射带相比发生了红移和劈裂现象,可以从配合物的UV-Vis-NIR吸收光谱中得到佐证.     

2个二核钌(Ⅱ)多吡啶配合物的合成、光物理和电化学性质

合成、表征了2个类似的含有4,5-二氮杂芴的二足配体L1和L2.配体L1和L2分别含有9-(2-羟基)苯亚氨基-4,5-二氮杂芴和9-(4-羟基)苯亚氨基-4,5-二氮杂芴.配体和Ru(bpy)_2Cl_2·2H_2O在2-甲氧基乙醇中回流反应得到相应的钌(Ⅱ)配合物[{Ru(bpy)2}_2(μ2-L1)](PF6)4和[{Ru(bpy)_2}_2(μ2-L2)](PF6)_4.对这2个配合物的紫外-可见吸收光谱、发射光谱和氧化还原性质进行研究.这2个配合物的金属-配体核移跃迁(MLCT)吸收峰在443 nm,发射峰在580 nm.这2个配合物的循环伏安图显示在1.34 V有1个RuⅢ/Ⅱ的可逆氧化峰和3个基于配体的还原峰.     

一个含有苯并15-冠-5单元的Ru(Ⅱ)多吡啶配合物的合成及性质研究

合成、表征了一个多吡啶配体(L)和相应的Ru(Ⅱ)配合物[(bpy)2RuL](PF6)2.在室温乙腈溶液中,该配合物在452nm显示特征的金属-配体核移跃迁吸收峰,在641nm显示特征发射峰.电化学测试显示配合物有一个基于钌(Ⅱ)的氧化过程和三个基于配体的还原过程.配合物与钠离子的作用通过紫外可见吸收光谱、发射光谱和电化学滴定进行研究.把钠离子加入到配合物的乙腈溶液中,配合物的荧光强度增加、紫外可见吸收蓝移、基于钌(Ⅱ)的氧化峰向阴极移动.     

Ru （Ⅱ）多吡啶配合物-钠离子探针

合成了一个新颖的多吡啶配体二吡啶并[3,2-a：2＇,3＇-c]吡嗪并-15-冠-5（L）和相应的配合物[（bpy）2RuL] （PF6）2（1）[Ru（L）3] （PF6）2 （2）.配合物与Na＋的结合性能通过荧光、紫外可见吸收光谱、循环伏安法进行研究.当把钠离子加入到配合物1和2的乙腈溶液中,配合物的荧光强度逐步增强、紫外可见吸收产生增色效应、基于钌（Ⅱ）中心的氧化还原电对向阴极移动.     

含双PNP和O-烷基二硫代磷酸配体的双核镍配合物的合成及其电化学性能

合成了4种含亚烷基双(二(二苯基膦基)胺(即双PNP)和O-烷基二硫代磷酸的双核镍配合物((CH_2)_n(N(PPh_2)_2)_2) Ni(S_2P{O}OR)_2(1:n=4,R=CH_3;2:n=4,R=C_2H_5;3:n=3,R=CH_3;4:n=3,R=C_2H_5),用红外光谱、核磁共振谱和紫外-可见吸收光谱对配合物的结构进行了表征。用X-射线单晶衍射测定了配合物1的单晶结构,配合物1含有两个畸变平面四边形Ni S_2P_2。用循环伏安法测定了配合物1～配合物4在乙腈中的电化学性能及其在三氟乙酸(TFA)中的电催化性能,电化学测定表明配合物1～配合物4均具有电催化还原TFA制氢的能力。1 mmol·L~(-1)配合物1～配合物4在添加120 mmol·L~(-1)三氟乙酸的乙腈溶液时的电催化制氢的转换频率(TOF)和过电位(η)分别为(442.5～469.5) s~(-1)和(0.89～0.98) V。     

钌（Ⅱ）配合物合成、表征及其与DNA相互作用研究

设计合成一个新的配体（CHIP）和它的两个钌（Ⅱ）多吡啶配合物[Ru（bpy）2（CHIP）]（ClO4）2（bpy=2,2’-联吡啶,CHIP=2-环己基咪唑并[4,5-f]邻菲咯啉）和[Ru（phen）2（CHIP）]（ClO4）2（phen=1,10-邻菲洛林）,采用元素分析,质谱和^1HNMR对其进行表征。用电子吸收光谱、粘度测试、DNA熔点变化研究配合物与DNA作用。研究结果表明配合物与DNA之间通过插入作用结合。     

1种Nd(Ⅲ)配合物的合成、结构及近红外发光性能研究

采用水热合成方法,以邻苯二甲酸和己二酸为配体,合成了1种具有3D无限结构的Nd(Ⅲ)配位化合物[Nd2(C8H4O4)2(C6H8O4)(H2O)4]n,并得到了它的单晶体.通过X射线单晶衍射,确定了该配合物的晶体结构,该配合物属于三斜晶系,P1空间群.在室温下,测定了配合物晶体粉末的IR光谱,UV-Vis-NIR吸收光谱及荧光激发和发射光谱,并进行了分析指认.该配合物在近红外区表现出明显的Nd(Ⅲ)离子特征发射,这应该是得益于配体的敏化作用.另外,配合物的近红外发射与理论发射相比出现了位移现象,可以从它的UV-Vis-NIR吸收光谱得到佐证,这应该是形成配合物后,在晶体场及Nd(Ⅲ)的4f能级的相互影响下,体系内部能级得到调谐的结果.     

L-丝氨酸水杨醛希夫碱镍(Ⅱ)配合物的合成、结构及与DNA的相互作用

合成了L-丝氨酸水杨醛希夫碱及邻菲咯啉混配体镍(Ⅱ)配合物,[Ni(ser-sal)(phen)(CH3OH)](ser-sal为L-丝氨酸与水杨醛形成的希夫碱,phen为1,10-邻菲咯啉),利用元素分析和红外光谱进行了表征.X-射线单晶衍射测定表明,配合物属于单斜晶系,C2/c空间群,晶胞参数为a=26.040(2),b=15.110 1(13),c=11.592 0(9),α=90°,β=107.128(2)°,γ=90°,V=4 358.8(6)3,Z=8,F(000)=1 984,R1=0.078 5,wR2=0.204 0.在晶体中配合物以分子间氢键作用形成二维网状结构.利用紫外可见吸收光谱、荧光光谱和圆二色光谱法研究了该配合物与小牛胸腺DNA(CT-DNA)的相互作用.结果表明,该配合物与DNA作用方式为插入模式,与DNA的结合常数Kb为7.8×104 L·mol-1,荧光猝灭常数为Ksq为0.91(CCDC∶1442728).     

一种新的环金属化钌配合物的合成与表征

合成了一种新的C,N-配位型环金属化钌染料敏化剂Ru-1,通过核磁共振氢谱以及红外光谱对该配合物进行了表征．由紫外-可见吸收光谱表明：该配合物的金属到配体的电荷转移跃迁（MLCT）吸收最大可达546nm,比传统的明星染料N3（[Ru（dcbpy）2（NCS）2],dcbpy=2,2＇-二联吡啶-4,4’-二羧酸）红移约10nm,且摩尔消光系数提高了约1．5倍．由此说明该配合物在长波方向表现出比N3更为优良的吸收性能,这对提高染料敏化纳米晶太阳能电池的光电转化效率十分有利．     

单核钌配合物的合成、表征及抗肿瘤活性研究

合成了两个含有硫醚配体的单核钌配合物Ru1和Ru2,通过元素分析、红外光谱、电喷雾质谱和核磁氢谱对其进行了表征,并做了紫外-可见吸收光谱及电化学测试。通过体外细胞毒性实验研究了Ru1和Ru2对宫颈癌细胞(Hela)、胃癌细胞(BGC823)和乳腺癌细胞(MCF-7)三种肿瘤细胞的细胞毒性。结果表明:Ru1的抗肿瘤活性比Ru2强,而Ru1和Ru2均对MCF-7最具有选择性,初步说明Ru1和Ru2有作为抗癌药物的潜力。最后通过荧光染色和流式细胞仪观察Ru1对MCF-7细胞凋亡情况。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.