2-取代硫醚-5-(5-苯基-1H-3-吡唑基)-1,3,4-噁二唑类化合物的合成及光学性能研究

以5-苯基-1H-3-吡唑甲酰肼为起始原料,经与二硫化碳环合和巯基烷基化两步反应,合成了5个新型的2-取代硫醚-5-(5-苯基-1H-3-吡唑基)-1,3,4-噁二唑类化合物,其结构经IR,~1 H NMR表征.光学性能研究表明目标产物具有良好的荧光性,其最大发射波长在344~347nm范围内.     

新型含吡唑基[1,2,4]噁二唑-[5,4-d][1,5]苯并硫氮杂卓衍生物的合成与表征

以[1,5]苯并硫氮杂卓衍生物1a-l和含吡唑基的氯代肟4为起始原料,通过1,3-偶极环加成的方法合成了一系列新型含吡唑基[1,2,4]噁二唑-[5,4-d][1,5]苯并硫氮杂卓衍生物.并通过元素分析、1 H NMR,MS,IR对这类化合物进行了表征.     

含有咔唑-噁二唑双极性单元的阳离子型有机铱(Ⅲ)配合物的合成及其发光性能

合成了一个新颖的含有咔唑-噁二唑双极性单元的阳离子型有机铱(Ⅲ)配合物[(CPPO)Ir(ppy)2]PF6(CPPO:2-(4-(3-(9-(2-乙基己基)-9H-咔唑-3-基)-1-(吡啶-2-基甲基)-1H-吡唑-5-基)苯基)-5-苯基-1,3,4-噁二唑;ppy:2-苯基吡啶).并对其紫外-可见吸收、光致发光和热稳定性进行了研究,结果显示该配合物固态时可被蓝光激发,其热分解温度为270℃,可适用于发光二极管、发光电化学池等发光器件.     

1,3,4-噁二唑衍生物的合成研究进展

1,3,4-噁二唑衍生物作为一类重要的杂环化合物,具有独特的生理和光学活性,在医药、农业、材料等领域的应用日益受到关注.因此,1,3,4-噁二唑衍生物的合成也成了人们研究的热点.文章综述了近年来合成1,3,4-噁二唑衍生物的传统方法、新方法、新试剂及新技术.     

2,5-二[4-(4-溴苯氧基亚甲基)苯基]-1,3,4-噁二唑的合成与表征

结合噁二唑优良的电子传输性能,以对甲基苯甲酸和水合肼为原料,经过环化、溴化、醚化合成了一种新型主链含噁二唑单元有机聚合物电致发光材料重要中间体2,5-二[4-(4-溴苯氧基亚甲基)苯基]-1,3,4-噁二唑,其化学结构通过IR、1H NMR进行了表征.产品总收率22.6%.     

微波辐射下2-取代-5-(2-苯并呋喃)-1,3,4-噁二唑类化合物的合成与表征

在微波辐射条件下,以2-氯亚甲基-5-苯并呋喃-1,3,4-噁二唑为中间体,合成了一系列新的1,3,4-噁二唑类化合物.用元素分析,IR及1H NMR确证了其结构.     

新型含吡唑基异噁唑啉衍生物的合成及晶体结构

为实现多种活性成分的有效叠加和为药物筛选提供先导化合物,以吡唑甲醛1和氯代苯甲醛肟3为原料,经过缩合、环合反应得到了16种未见报道的含吡唑基异噁唑啉衍生物,并通过元素分析、1H-NMR、IR及MS对这些化合物进行了表征.对4c4,5-二氢-3-苯基-5-(1-苯基-3-甲基-5-苯氧基吡唑-4-基)-4-(4-甲氧基)-苯酰基异噁唑啉的X射线晶体衍射研究表明:其属于三斜晶系;P1空间群;晶胞参数a=0.58985(6)nm,b=1.02721(14)nm,c=1.16322(12)nm;a=92.647(4)°,β=98.497(3)°,(γ)=100.469(4)°;(D0)=1.287mg·m-3;L=0.086mm-1;V=0.68352(14)nm3;F(000)=278;Z=1;R1=0.0878;ωR2=0.1785.     

一种循环延长1,3,4-噁二唑-苯链的合成方法

1,3,4-噁二唑类化合物因具有独特的生物活性和光电性能而被广泛研究,在医药、有机电子和发光材料等领域具有广泛的应用价值.引入多个1,3,4-噁二唑结构单元,常常可以进一步提高此类化合物的功效性.通过将苯甲醛类化合物上的醛基转化为氰基后,再转化为四唑基,然后由苯四唑类化合物和对甲酰基苯甲酰氯反应生成1,3,4-噁二唑类化合物,此化合物保留了对甲酰基苯甲酰氯带入的醛基,可以进一步地采用相同方法循环反应下去,从而可以得到含有多个1,3,4-噁二唑-苯结构单元的系列链状化合物.     

新型1,3,4-噁二唑衍生物的合成

 1,3,4-噁二唑广泛应用于医药、农药、材料等诸多领域,该文设计并合成了一系列含N-正癸基咪唑结构单元的1,3,4-噁二唑化合物,目标产物结构经NMR, MS 和 EA鉴定。     

含吡啶环的1，3，4-噁二唑衍生物的合成进展

含有吡啶基环的1，3，4-噁二唑衍生物表现出多种优良的农药生物活性，按照含不同数目吡啶环的1，3，4-噁二唑衍生物的合成进展进行了综述。     

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.     

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.     

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.     

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.     

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.     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.