3,4,5-三苄氧基苯甲酰腙类化合物的合成及生物活性研究

以没食子酸为起始原料,设计合成了10个新的3,4,5-三苄氧基苯甲酰腙类化合物4a~4j,其结构经元素分析、1HNMR和MS表征。初步的生物活性测试结果表明,所合成的化合物均表现出不同程度的抑菌活性,其中,4f的活性最好,在50 mg.L-1浓度下对水稻纹枯病菌和小麦赤霉病菌的抑制率达90%以上。     

新型共轭高分子聚[吡咯2,5-二(3-甲氧基-4-羟基苯甲烯)]的合成与表征

本文采用两步法合成了一种新型共轭高分子聚 [吡咯 2 ,5 二 (3 甲氧基 4 羟基苯甲烯 ) ],其前聚物聚 [吡咯 2 ,5 二 (3 甲氧基 4 羟基苯甲烷 ) ]可溶于一般的极性有机溶剂 .通过红外、核磁、紫外光谱分析鉴定了产物及其前聚物的结构 .利用DSC与TGA测试分析了所合成聚合物的热学性质 .紫外光谱表明在聚合物链中引入醌式吡咯环结构有利于降低产物的能隙 ,其能隙为 1 14eV ,属窄能隙类共轭聚合物 .经碘掺杂后产物的电导率在半导体的范围内     

4-(2-甲基-丁氧基)苯甲酰氧基-4′-苯甲酰氧基苯基卟啉的合成

四 (对羟基苯基 )卟啉 [Ｔ( 4 ＨＰ)Ｐ]具有共扼大π键及刚性平面 ,在 65 0ｎｍ左右产生纯的红色荧光 ,是一种较好的发光材料。依据 4 ( 2 甲基 丁氧基 )苯甲酚氧基 4′ 苯甲酰氧基苯基穴醚 [2 .2 ]具有液晶性[1 ] ,本文设计使Ｔ( 4 -ＨＰ)Ｐ的羟基进行酯化反应后生成的卟啉衍生物同时具有荧光和液晶性质 ,估计在发光材料特别是新近出现的圆偏光电致发光材料中具有潜在的应用[2 ] 。反应混合物通过柱色谱分离得到了酯化程度不同的几种卟啉衍生物。合成路线如下1　实验1 1　仪器及试剂Ｐｅｒｋｉｎ Ｅｌｍｅｒ1 70 0红外光谱仪 ,ＫＢｒ压…     

2,6-二(对甲氧基苯甲酰乙酰基)吡啶的合成工艺

二(对甲氧基苯甲酰乙酰基)吡啶;claisen缩合;合成工艺     

超声法合成聚[2-甲氧基-5-(2''''-乙基己氧基)-对亚苯基亚乙烯基]的研究

采用超声合成方法,以对甲氧基苯酚为起始原料,经醚化、溴甲基化和聚合反应,得到无凝胶、完全可溶、高分子量的聚(2-甲氧基-5-(2'-乙基己氧基)-对亚苯基亚乙烯基)(MEH-PPV),其数均分子量高达9.5×105,分子量分布为2.4.并通过核磁共振氢谱(1H-NMR)和红外光谱进行了结构表征.与常规的机械搅拌反应相比,超声合成方法具有反应时间短、反应温度低、产率高、聚合物分子量较大等特点,特别是这种方法有效抑制了聚合过程中的凝胶化问题,合成的MEH-PPV具有更高的荧光量子效率.     

超声法合成聚[2-甲氧基-5-(2′-乙基己氧基)-对亚苯基亚乙烯基]的研究

采用超声合成方法,以对甲氧基苯酚为起始原料,经醚化、溴甲基化和聚合反应,得到无凝胶、完全可溶、高分子量的聚(2-甲氧基-5-(2′-乙基己氧基)-对亚苯基亚乙烯基)(MEH-PPV),其数均分子量高达9.5×105,分子量分布为2.4.并通过核磁共振氢谱(1H-NMR)和红外光谱进行了结构表征.与常规的机械搅拌反应相比,超声合成方法具有反应时间短、反应温度低、产率高、聚合物分子量较大等特点,特别是这种方法有效抑制了聚合过程中的凝胶化问题,合成的MEH-PPV具有更高的荧光量子效率.     

相转移催化法合成聚(2,5-二丁氧基对苯乙炔)

利用相转移催化剂(PTC)一步合成了聚(2,5-二丁氧基对苯乙炔)。研究了PTC种类、用量、反应时间、温度和碱浓度对反应产率的影响,并对产物的结构和性能进行了分析。初步探讨了其聚合机理。实验结果表明:季铵盐的催化效果优于聚乙二醇,二甲亚砜、苯等可作为有机相用于聚合反应。碱浓度为50％、反应温度为60℃时,产物在硝基苯中具有较好的溶解性。经碘掺杂后导电率达9.6×10~(-2)S·cm~(-1)。     

新型水溶性大π共轭高分子——聚吡咯｛2,5-[双(对二甲氨基苯甲烯)]｝的合成

该研究合成了一种新型水溶性大π共轭高分子———聚吡咯 ｛２ ,５ ［ 二（ 对二甲氨基苯甲烯）］｝（ＰＰＤＭＡＢ） ,它能溶于强酸的水溶液,在１ｍｏｌ／Ｌ 的盐酸中溶解度为０－５ ～１－０ｇ／１００ｍＬ．通过ＥＡ、ＸＰＳ、ＦＴ ＩＲ、ＵＶ Ｖｉｓ ＮＩＲ、Ｉｎ ｓｉｔｕ ＵＶ Ｖｉｓ ＮＩＲ 对ＰＰＤＭＡＢ进行了结构表征．通过质子化、碘掺杂、浓硫酸（９８ ％ ） 掺杂等处理,ＰＰＤＭＡＢ的电导率提高２～４ 个数量级（δ＝ １０ － ７ ～１０－ ５Ｓ／ｃｍ） ．在质子化、去质子化的过程中ＰＰＤＭＡＢ发生了可逆的颜色变化,本征态（ 综色） 质子态（ 墨兰色） ．     

α-(取代苯氧基苯甲酰氧基)烃基膦酸酯的合成方法

采用两种合成路线来合成 O,O-二乙基 -α- (2 -氯 - 4-三氟甲基苯氧基苯甲酰氧基 )丙基膦酸酯 ,并对其结果进行了比较分析 ,以此来探讨 α- (取代苯氧基苯甲酰氧基 )烃基膦酸酯的合成方法     

Synthesis and Crystal Structure of 4,4'-(4-(1-Naphthyl)-4-phenyl-1,3-butadienylidene)-bis[N,N-diethylbenzenamine]

1 INTRODUCTION Organic photo-conductors (OPCs), due to their great advantages over inorganic ones, have been widely used in xerography and holography and aroused considerable interest in the past several de- cades. Recently, almost all OPCs are of a layered structure with a thin charge generation layer (CGL) and a charge transport layer (CTL). Current resear- ches are directed to both improving the chara- cteristics of existing OPCs and developing new ma- terials for future applicati…     

Synthesis and characterization of poly[2,5-bis(triethoxy)-1,4-phenylene vinylene]

The synthesis of a highly soluble, 2,5-disubstituted poly(p-phenylene vinylene) with pendant side chains containing ether groups was accomplished by a dehydrochlorination route. Specific interactions of the oxygen-containing side chains with the solvent are presumably responsible for the high solubility of the polymer, especially in protogenic solvents. The polymer microstructure was characterized by ¹H- and ¹³C-NMR. The polymer showed solvatochromic properties when dissolved in a variety of solvents. The relatively high molecular weight (M_n = 17,000) permitted the fabrication of free-standing films. The electrical conductivity of iodine-doped films was approximately 2 × 10^–2 S cm^–1. © 1995 John Wiley & Sons, Inc.     

聚(丙烯酸钠-4-乙烯基吡啶)的生物降解性和功能性研究

用自由基共聚法制备了一系列可生物降解的功能聚合物聚(丙烯酸钠-4-乙烯基吡啶)[P(SA-co-4VP)],研究了其组成和分子量与生物降解性、资合性及分散性间的关系.结果表明:聚合物中小乙烯基吡啶含量越大,P(SA-co-4VP)的生物降解越显著.分子是一定时,少量的个乙烯基吡啶引入聚丙烯酸钠主链是增强聚合物生物降解性和保持原有功能特性的有效途径.     

Preparation,characterization and thermal stability of poly[2-(Dimethylamino)ethyl acrylate]

Poly[2-(dimethylamino)ethyl acrylate] (PDAEA) and polymer complexes of 2-(dimethylamino)ethyl acrylate (DAEA) with nickel(II), copper(II), iron(III) and cobalt(II) chlorides were prepared and characterized by means of IR, electronic spectra and elemental analysis. The thermal stability of the homopolymer was compared with those of the polymer complexes, and the order of stability was given. The activation energies of the polymer complexes were calculated.     

SYNTHESIS AND PROPERTIES OF NEW SIDE-CHAIN LIQUID CRYSTALLINE POLYMER WITH LATERALLY ATTACHED MESOGENS BY ESTER GROUP*

New liquid crystalline monomer, 2,5-bis[(4'-methoxyphenoxy)carbonyl]phenyl acrylate wassuccessfully synthesized. Polyacrylate with laterally attached mesogens via ester linkage was also derived.This polymer forms an enantiotropic liquid crystal phase while its monomer exhibits a metastable nematicphase with respect to the crystalline state. However, its liquid crystallinity is very low as compared to that ofpoly{2,5-bis[(4'-methoxyphenoxy)carbonyl]-styrene}.     

Synthesis and Crystal Structure of 2,5—Bis（morpholino）—3,4—bis（p—chlorophenyl）thiophene

1 INTRODUCTION -Thiocarbonylthioformamide synthesized in 1980[1, 2] is a class of stable and almost unexplored compounds[3]. We have reported the reaction of - thiocarbonylthioformamides in our previous paper[4]. Here, we will report a novel synthesis of 2 by the reaction of 1 and trimethyl phosphite in refluxing xylene. In order to determine the structure of 2, X- ray crystallographic study was carried out. 2 EXPERIMENTAL 2. 1 Preparation of the title compound Trimethyl phosph…     

Synthesis and Characterization of a Novel Copoly(aryl ether ketone) Containing 4, 4''''-Biphenyl-bis[4-phthalazin-1(2H)-one] Moiety

Poly(aryl ether ketone)s are a category of high performance engineering thermoplastics characterized by high glass transition temperature and excellent thermooxidative stability. And they have important applications in electronic, electric, aircraft and aerospace industries1~3. Considerable efforts have been made towards the improvement of solubility or processability of poly(aryl ether ketone)s4,5. In our work, a novel bis(phthalazinone) monomer 1 4, 4-biphenyl-bis[4-phthalazin-1(2H)-one] …     

2,5-二[4-(2-芳基乙烯基)苯基]噁二唑的合成及发光特征

二乙烯联苯及其衍生物是一种可发射蓝光的小分子空穴型有机发光材料, 通过Wittig-Horner反应, 将电子传输型噁二唑环“嵌入”其中, 设计合成了6个2,5-二[4-(2-芳基乙烯基)苯基]-1,3,4-噁二唑化合物. 经光谱分析和元素分析等方法确认了它们的化学结构. IR和UV-vis分析数据表明标题化合物分子结构中的C＝C双键均为反式结构特征. 研究结果表明: 2,5-二[4-(2-对二甲氨基苯基乙烯基)苯基]-1,3,4-噁二唑具有良好的蓝色发光性能; 取代基对标题化合物的UV-vis吸收光谱和发光特性的影响显着.     

聚[2-(4-苯基偶氮苯氧基)乙基丙烯酸酯]的合成及光响应性能研究

从4-羟基偶氮苯出发,依次与2-氯乙醇、丙烯酰氯反应,合成了2-(4-苯基偶氮苯氧基)乙基丙烯酸酯(PAPEA)。接着以PAPEA为单体,二硫代苯甲酸异丁腈酯(CPDB)为链转移剂,偶氮二异丁腈(AIBN)为引发剂,利用可逆加成-断裂链转移(RAFT)聚合法合成了聚[2-(4-苯基偶氮苯氧基)乙基丙烯酸酯](PPAPEA)均聚物,同时考察了反应时间、引发剂和链转移剂浓度等因素对聚合反应的影响。利用FT-IR、1H-NMR和GPC等对单体和聚合物的结构进行了表征,并利用UV对聚合物的光响应性能进行了测试。结果表明,PAPEA的聚合反应动力学曲线呈良好的线性关系,分子量分布较窄(小于1.3);均聚物在紫外光照下的异构化速率随分子量的增大而减缓,而其在自然光下的回复速率变化不大。     

Copolymers of (±)2-ethylhexyl acrylate and 3-[3,3,3-trimethyl-1,1-bis (trimethylsiloxy) disiloxanyl] propyl methacrylate

Statistical copolymers of (±)2-ethylhexyl acrylate and 3-[3,3,3-trimethyl- 1,1-bis (trimethylsiloxy) disiloxanyl] propyl methacrylate were synthesized and the reactivity ratios and the Q and e values were calculated. The glass transition temperatures of the copolymers were in good agreement with the predictions of Fox's equation and Wood's formula. © 1997 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 35 : 3571–3574, 1997