苯乙烯

In solid phase process, the polyiodides, which include triiodide, pentaiodide, heptaiodide, nonaiodide and undecaiodide tetra-n-butyl ammonium iodide, tetrabutyl ammonium bromide and tetramethyl ammonium iodide poly-compounds, were synthesized by the low-heat solid phase reaction between iodine and tetra-n-butyl ammonium iodide, tetrabutyl ammonium bromide or tetramethyl ammonium iodide; In complexation process, solution polyiodides were synthesized by complexing action of different agents; In resinifying process, triiodide, pentaiodide, heptaiodide resinic polyiodides were synthesized by ion-exchange when the strong basicity styrene anion exchange resin, potassium iodide and iodine were used as raw materials.

固相法是用正四丁基碘化铵、四丁基溴化铵或四甲基碘化铵分别与碘作用，通过低热固相反应，合成出碘三、碘五、碘七、碘九和碘十一形式的正四丁基碘化铵、四丁基溴化铵或四甲基碘化铵的系列高聚碘化合物；在络合法合成溶液高聚碘的实验中，选用几种络合剂通过络合作用首次合成了溶液高聚碘；树脂法合成高聚碘的实验是采用强碱性苯乙烯系阴离子交换树脂、碘化钾和碘为原料，通过离子交换，合成了碘三、碘五和碘七形式的树脂高聚碘。

A method using α methylstyrene as raw material to prepare β methylene phenethyl alcohol,a new rose flavor ,by chlorination,esterification and saponification was studied.

对α 甲基苯乙烯经氯代、酯化、皂化合成新型玫瑰香料β亚甲基苯乙醇的方法进行了研究，选择PTC1作为相转移催化剂，当m∶m (NaAc·3H2 O)∶m (PTC1 )=1 。0 0 0∶0 30 0∶0 0 2 4时，80℃下反应 6h ，产率为 67 3%。

ResultsOnly five species of Pholidota genus were studied and 41 compounds were isolated and characterized including 9,10dihydrophenanthrenes, phenanthraquinone, bibenzyls, stilbenes, triterpenoids, phenyl propanoids, lignans, sterols and aliphatic compounds, and some plants and compounds exhibited analgesic, antioxidant, anticancer and NO production inhibitory activities.

结果目前石仙桃属植物研究所涉及的种类仅5种，从该属植物中分离出化学成分41种，包括9， 10二氢菲、菲醌、联苄、二苯乙烯、三萜、苯丙素、木脂素、甾体和脂肪族等结构类型。一些种类所含成分在镇痛、抗氧化、抗癌、抑制NO生成等方面显示了较好的活性。

Finally, a comprehensive model was proposed to elucidate the main characteristics and essential time constants of the cis/trans photoisomerization processes among the three 1,4-distyrylbenzene isomers.

最后，我们提出一套完整的动力学模型来描述对-二苯乙烯基苯的顺-反异构化的特徵及其异构化的速率。

Twenty-seven compounds were isolated from the methanol extract of the stems of Pinus massoniana by means of chromatographic methods, and their structures were elucidated as 8(14),15-Pimaradien-19-oic acid (1), Pimaric (2), Podocarpic acid (3), 12-Hydroxydehydroabietic acid (4), Dehydroabietic acid (5), 15-Hydroxydehydroabietic (6), 3β-Methoxyserrat-14-en-21-one (7), 3β-Hydroxy- serrat- 14-en-21-one (8), 3β-Methoxyserrat-14-en-21-one-30-al (9),(24R)-Stigmst- 4-ene-3-one (10),β-sitosterol (11),-3-Hydroxy-5-methoxy-stilbene(12), 4-Hydroxy-3- methoxycinnamaldehyde (13),-Ferulic acidtetracosyl ester (14), Alkylferulates (15), Pinocembin (16), Coniferaldehyde (17), Matairesinol (18),-Nortrachelogenin (19), Balanophonin (20), Cedrusin (21),-Pinoresinol (22), Tanegoside (23), 1,2-Bis-(4-hydroxy-3- methoxyphenyl)-propane-1,3-diol (24),(1S*, 2S*)-1-(4- Hydroxyphenyl) glyceri...

同时对马尾松枝条的甲醇提取物利用各种色谱技术进行了分离纯化，并利用现波谱技术鉴定了27个化合物的结构，分别为：8(14)，15-Pimaradien-19-oic acid (1)、海松酸(2)、罗汉松酸(3)、12-羟基脱氢松香酸(4)、脱氢松香酸(5)、15-羟基-脱氢松香酯(6)、3β-甲氧基-锯齿石松-14-烯-21-酮(7)、3β-Hydroxyserrat-14-en-21-one (8)、3β-Methoxyserrat-14-en-21– one-30-al (9)、(24R)-豆甾-4-烯-3-酮(10)、-3-羟基-5-甲氧基-二苯乙烯(12)、4-Hydroxy-3-methoxycinnamaldehyde (13)、-Ferulic acidtetracosyl ester (14)、Alkylferulates (15)、Pinocembin (16)、Coniferaldehyde (17)、罗汉松树脂酚(18)、 Balanophonin (20)、tanegoside (23)、1，2-Bis-(4-hydroxy- 3-methoxyphenyl)-propane- 1，3-diol (24)、(1S*，2S*)- 1-(4-hydroxyphenyl)glycerins (25)、(1R*，2R*)-1-(4-hydroxy- phenyl)gly-cerins (26)和赤松素(27)。

In this paper, twenty novel meso-substituted porphyrins of four series were designed and synthesized by increasing the conjugation of porphyrins or introducing substituents with high fluorescence quantum yield into the meso-position of porphine, and then red OLEDs were fabricated by doping porphyrins into a suitable host using ten porphyrins compounds and their electrolumin -escence properties were tested. The main contents and results were generalized as follows:Three meso-tetrakisporphyrins 4a-c and three conjugations of porphine-triarylamine linked by styrene 10a-c were synthesized and characterized by 1H NMR, MS, UV-vis spectra and fluorescence emission spectra.

本文通过增大卟啉分子的共轭结构或将具有高荧光量子产率的基团连接到卟吩环的中位得到了四类共20个新型的卟啉化合物，并选取其中10个化合物制备有机发光器件来考察材料的电致发光性能，具体内容包括以下几个部分：设计合成了3个中位直接被三芳胺取代的卟啉化合物4a-c和3个通过苯乙烯连接的卟吩-三芳胺共轭体10a-c，通过核磁氢谱、质谱、紫外吸收光谱和荧光发射光谱表征了新化合物的结构。

Diethanol amine and 2,2-bis(methylene-2-bromoisobutyrate) propionyl chloride were used as divergent reagents respectively before preparations of the second and the third generations. The resultant polymers were characterized by GPC and ~1H NMR.

为了利用含有可降解链段的树枝状聚合物(dendrimer-like polymer)制备纳米空心球，我们结合ATRP和开环反应合成了两种苯乙烯和L-丙交酯的三代树枝状共聚物CPSt(PLLA_2_2_3和CPSt(PLLA_2_2_4。

The pyranyl functional group has compatibility similar to flavonoid natural pigment, and especially facilitates the extraction of natural pigment.

它同时具备亲水性、碱性吡喃功能基团和疏水性苯乙烯骨架，对蛋白等两性生物试剂具有良好的亲合性；吡喃功能基团与黄酮类天然色素具有相似相容性，特别有利于天然色素的提取。

Cyclophos phamide SBQ.pVA SBQ.pVA + polymer emulsion added styryl pyridinium salt pVA's acronym.

SBQ.pVA＋高分子乳剂 SBQ.pVA是加进了苯乙烯吡啶盐的pVA之缩略词。

Moreover, nano-scale SiO〓 particle is as seed, styrene-acrylate-acrylic acid emulsion polymerization and soapless acrylic emulsion are studied from varying the level of SiO〓 particle and reaction temperature, particle size of these emulsions are determined and SiO〓 content of participating polymerization is also determined. Kinetic study is carried out in the presence of nano-scale SiO〓 particle.

此外用原位聚合法制备了纳米SiO〓/苯乙烯-丙烯酸酯复合乳液和无皂丙烯酸乳液，研究了不同SiO〓含量、反应温度等对聚合反应稳定性的影响，测定了所得乳胶粒的粒径，分析了在乳液中SiO〓含量，并进行了在SiO〓存在下乳液聚合反应的动力学研究。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。