首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 0 毫秒
1.
Low molecular weight poly(glycidyl methacrylate)s (PGMAs) were prepared by photopolymerization in ethyl acetate, with benzophenone (BP) as photoinitiator, and triethylamine (TEA) as hydrogen donor. The existence of semipinacol dormant end groups in PGMA was confirmed by FT-IR and ^1H-NMR, and the content of the semipinacol dormant groups was determined quantitatively by ^1H-NMR measurement. The effects of various thctors, such as reaction time, BP concentration and monomer concentration on the synthesis of the polymers were investigated systematically. The molecular weights of the polymers were also investigated with GPC. It is shown that increasing BP concentration and decreasing irradiation time and monomer concentration led to a significant decrease of the molecular weights.  相似文献   

2.
THEBIRCHREDUCTIONOF(1-OXO-CYCLOHEXENYLO)-2'-[2',3',b]-6,7-MEHYLENEDIOXYBENZOZEPINEJiangHongWANG;YunZhenJIANG;ZhiZhongZHAO(Ins...  相似文献   

3.
UNUSUAL FORMATION OF ORGANO-NEODYMIUM AND -SAMARIUM CATIOHS AND X-RAY STRUCTURE OF[(MeOCH_2CH_2C_5H_4)_2Sm(thf)][Co(CO)_4]UNUSUA...  相似文献   

4.
将Gly-GlyO、4,4'-联吡啶与Cu(NO_3)_2·H_2O在二次水溶液中反应,合成出以4,4'-bpy为中继基、Cly-GlyO为螯环的新型双核铜配合物,经X射线单晶结构分析确定该配合物晶体的化学结构式为[(H_2NCH_2CONHCH_2COO)Cu(OH)(C_(10)H_8N_2)Cu(ON)(H_2NCH_2CONHCH_2COO)]·9H_2O.晶体属P 空间群,晶胞参数a=1.1412nm,b=1.2298nm,c=1.4269nm,α=113.82°,β=101.91°,γ=103.64°,Z=2.最终一致性因子R值为0.068,R_w值为0.057,标准偏差σ=0.1951。  相似文献   

5.
SynthesisandCrystalStructureofPyridine-2-thiolato-MolybdenumComplex[Et_4N][Mo(CO_4)(pyS)]YuPei-Hua;HuangLiang-Ren;ZhuangBo-Tao...  相似文献   

6.
CrystalStructureofμ-[meso-1,2-Bis(n-propylsulphinyl)ethane]-(O,O')-[diphenyltin(Ⅳ)dichloride]¥YuXi-Lin;BaoJian-Chun;ShaoPin-X...  相似文献   

7.
ELECTRONTRANSFERAGENTDEPENDENCYOFMONOOXYGENATIONOFCYCLOHEXANECATALYZEDBYSILICAIMMOBILIZEDN,N'-BIS[2-(BENZIMIDAZOLYLMETHYL)]AM...  相似文献   

8.
SynthesisandCrystalStructureofPyridine-2,6-dicarboxylateVanadiumComplex:[(Pyridine-2,6-dicarboxylate)VO_2]_2[4,4'-bipyridine]·...  相似文献   

9.
THESTUDYOFSTRUCTUREANDDYNAMICSOFDINUCLEARCOMPLEXES[Mo(VI)]_2-EDTAAND[Mo(VI)]_2-EGTABY~1HNMRRuiFangSONG;FeiLI;GuangMinLIU;YouGa?..  相似文献   

10.
合成了标题配合物[Li(THF)_4][t-BuCp)Yb(NPh_2)_3],经元素分析、红外光谱表征,并测定了其晶体结构。配合物属正交晶系,Pbca空间群,晶体学参数a=1.4515(5),b=2.2833(5),c=3.3554(6)nm;V=11.1209(5)nm ̄3;D_c=1.31g·cm ̄_(-3);F(000)=44.23,Z=8。最后一致性因子R=0.047,R_w=0.045,平均Yb-N键长是0.2264(9)nm。  相似文献   

11.
new series of sulfur-contalning side chain liquid crystalline polymers were described. Mesomorphic side chains with methylene spacer in different length have been synthesized and their structures were identified by NMR, IR and MS.The liquid crystalline nature of the polymers was characterlzed by microscopy.The Polymers have liquid crystalline nature.  相似文献   

12.
REACTIVE POLY(ARYLENEETHERSULPHONE) :MALEIMIDE-TERMINATED POLY(ARYLENEETHERSULPHONE) OLIGOMERS USING N-(4-HYDROXYPHENYL) MALE...  相似文献   

13.
聚甲基丙烯酸4[(4'-硝基-1'硫酰基苯)-1-羟烷氧基本基]酯的合成张维邦,蒋,许家瑞,曾汉民(中山大学材料科学研究所广州510275)关键词含硫液晶单元,侧链液晶高分子,液晶合成与表征侧链高分子液晶是高分子液晶的重要组成部分,是当前高分子科学中...  相似文献   

14.
SynthesisandCrystalStructureof[Tris(2-benzimidazylmethyl)amine][Imidazole]Copper(Ⅱ)PerchlorateZhouWei-Hong;LiuXiao-Lan;MiaoFa...  相似文献   

15.
TRANSFER HYDROGENATION OF KETONES BY PROPAN-2-OL OVER POLY(PHENYLENE OXIDE) ANCHORED RUTBENIUM CATALYST¥HanRongGAO;YunXU;ShiJ...  相似文献   

16.
N,N'-二(乙酰芳香环)-穴醚[2,2]的合成余江,许振华,徐光宪(北京大学化学与分子工程学院,稀土材料化学及应用国家重点实验室,北京,100871)关键词大环,穴醚[2,2],HTTA穴醚(Cryptand)是含有O及N和S等杂原子的多聚大环化合...  相似文献   

17.
SynthesisandStructureoftheHexanuclearDiazenido-oxomolybdate[(n-C_4H_9)_4N]_3[Mo_6O_(18)(N_2C_6H_4-p-NO_2)]LiHai-Lian;YouXiao-Zeng;...  相似文献   

18.
cis-[Pt(NH_3)_2Cl_2]和trans-[Pt(NH_3)_2Cl_2]的微型合成袁书玉,来月英(清华大学化学系,北京100084)cis-[Pt(NH2)2Cl2]为一抗癌药物,而它的反式异构体却没有这一特性。其原因也已在进行研究[1]。由...  相似文献   

19.
ANEFFICIENTANDSTEREOSPECIFICSYNTHESISOF1-PALMITOYL-2-[(z,z,z)-9,12,15-LINOLENOYL]-SNGLYCEROPHOSPHOCHOLINE¥JieXIAandYongZhengH...  相似文献   

20.
PRACTICALMETHODFORSYNTHESISOFNEWGLYCOLIPIDSN-[4(DIALKYL-L-GLUTAMATECARBONYLETHYLCARBO-NYLAMINO)BUTYL]LACTOBIONAMIDES¥ZhongZhi...  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号