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1.
丁二烯-甲基丙烯酸甲酯嵌段共聚物的阴离子聚合及表征 总被引:1,自引:0,他引:1
讨论了用阴离子方法进行了二烯与甲基丙烯酸甲酯共聚合的过程,并用GPC、FTIR、NMR和动态粘弹谱对共聚物进行了表征.证明所得聚合物为具有较高分子量、窄分布的二嵌段共聚物. 相似文献
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两亲嵌段共聚物溶液内胶束形成的温度效应 总被引:2,自引:0,他引:2
合成了一系列具有两亲嵌段结构的聚(乙二醇)(PEO)一聚(丙二醇)(PPO)共聚物.利用荧光探针及示差量热法测定了共聚物水溶液的临界胶束形成温度(CMT)值.发现二嵌段共聚物(PEO-PPO)和三嵌段共聚物(PEO-PPO-PEO)有着类似的变化规律,即随共聚物分子中疏水链(PPO)长度的增大,其CMT值降低.但三嵌段共聚(PPO-PEO-PPO)则因疏水链段处于共聚物分子的两端,因而在溶液中有可能形成立体网状交联结构.此外,利用探针分子在不同极性溶剂中荧光峰值波长发生位移的现象可以对形成胶束内核的组织程度、极性大小进行估测. 相似文献
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两种[对苯乙炔-2,5-二(十二烷氧基)对苯乙炔]共聚物的合成及性能研究 总被引:3,自引:0,他引:3
用含氯前聚物路线和Heck反应分别合成[对苯乙炔-2,5-二(十二烷氧基)对苯乙炔]无规共聚物及交替共聚物.由元素分析、凝胶渗透色谱、吸收光谱及DSC对其进行表征,研究了共聚物的组成与导电率、溶解性及发光性能的关系.比较了无规共聚物与交替共聚物在性能上的差别. 相似文献
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以4,4′(α,ω辛二酰氧)二苯甲酰氯,2,5二(4十六烷氧基苯甲酰氧基)对苯二酚和4,4′二(β羟基乙氧基)联苯为单体,通过溶液缩聚反应合成了一系列新的含两种液晶基元的串型液晶共聚物.共聚物通过GPC、DSC、TG、WAXD和偏光显微镜等方法表征.发现所有的共聚物加热至各自的熔点以上都能形成液晶态,在液晶态可以观察到大理石或破碎焦锥织构.所有共聚物的熔点(Tm)和液晶态清亮点(Ti)随聚合物中2,5二(4十六烷氧基苯甲酰氧基)对苯二酚用量的改变呈规律性变化. 相似文献
5.
高磺化度芳香聚醚醚酮的合成与表征 总被引:8,自引:0,他引:8
用3,3'-二磺酸钠基-4,4-二氟二苯酮合成了具有高磺化度的荷电聚醚醚酮.用红外吸收光谱及DSC对其进行了表征.研究了共聚物的组成、热稳定性、溶解性、成膜性及磺化度对共聚物性能的影响. 相似文献
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用自由基溶液聚合方法制备一系列苯乙烯-丙烯酸甲酯线型共聚物,用核磁共振仪测定了苯基在共聚物中的百分比.在该共聚物的四氢呋喃溶液中,用三氯乙酸汞在共聚物的苯环上进行亲电取代反应,得到可溶性汞化共聚物.由于这类汞化共聚物可溶于四氢呋喃、二氯甲烷等溶剂,用重沉淀法(Reprecipitation)多次提纯,得到了纯度很高、溶解性较好的含重金属二价录的共聚物.用红外光谱仪测定共聚物上的汞基因,用原子吸收仪定量测试共聚中的汞的百分取代率.结果表明在本文实验条件下,二价示可取代在苯环上,与丙烯酸甲酯基因没有作用. 相似文献
10.
用二苯甲烷钾为引发剂,阴离子聚合法合成了苯乙烯(St)-环氧乙烷(EO)嵌段共聚物,并用FTIR,^1H-NMR,SEC,WAXD和动态粘弹谱对共聚物进行了表征。结果表明所得聚合物为分子量可控,窄分布的两嵌段共聚物。 相似文献
11.
手性二噁唑啉吡啶铁和镍配合物的制备与表征 总被引:1,自引:0,他引:1
Tridentate bis(oxazolinylpyridine)(1) reacted with nickel chloride or ferrous chloride in anhydrous ethanol to form bis(oxazolinylpyridine) Nickel(Ⅱ) and Iron(Ⅱ) complexes. The stable solid complexes were characterized with IR, UV, MS, XPS and elemental analysis. No stable complexes were formed with bidentate bis(oxazoline)(2) ins- tead of bis(oxazolinylpyridine). 相似文献
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A simple and effective procedure for the enantioselective synthesis of (R)-and (S)-moprolol was described.The key step was the asymmetric synthesis of enantiopure (R)-and (S)-guaifenesin,which were synthesized from enantioenriched (R)-3-chloro-1,2-propanediol and (S)-epichlorohydrin via kinetics of hydrolysis resolution of racemic epichlorohydrin by chiral Salen-CoIIII complex.The e.e.values of both the optical compounds were above 98%,and the chemical structures of the target compounds were confirmed by 1H NMR,13C NMR,IR,and MS. 相似文献
13.
Masami Nakamoto Huub Koijman Martin Paul Wolfgang Hiller Hubert Schmidbaur 《无机化学与普通化学杂志》1993,619(8):1341-1346
The reaction of 1,2- and 1,3-benzenedithiol C6H4(SH)2 with chloro(phosphine)gold(I) complexes R3PAuCl (R = Et, Ph) in the presence of triethylamine in tetrahydrofuran gives stable gold(I) complexes 1,2-C6H4(SAuPR3)2 [R = Et ( 1 ) and Ph ( 2 )] or 1,3-C6H4(SAuPPh3)2 ( 3 ), respectively, in high yield. The compounds have been characterized by analytical and NMR spectroscopic data. From the reaction of 1,2-C6H(SH)2 with Et3P? AuCl a by-product [(Et3P)2Au]+ [Au(1,2? C6H4S2)2]? ( 4 ) has also been isolated in low yield. The crystal structures of compounds 2 and 4 have been determined by single crystal X-ray diffraction. The gold(I) atoms in complex 2 are two-coordinate with bond angles S? Au? P of 175.2(1) and 159.5(1)°, Au? S bond distances of 2.304(1) and 2.321(1) å, and a short Au…?Au contact of 3.145(1) Å. The gold(I) atom in the cation of complex 4 is also linearly two-coordinate with a P? Au? P angle of 170.1(1) Å and Au? P distances of 2.296(3) and 2.298(3) Å. The geometry of the anion in 4 shows a square-planar coordination of gold(III) by two chelating 1,2-benzenedithiolate ligands with Au? S distances between 2.299(3) and 2.312(3) Å (for two crystallographically independent, centrosymmetrical anions in the unit cell). 相似文献
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Rhodium(III), palladium(II) and platinum(II) complexes of Bis(o-aminobenzenesulfonyl)ethylenediamine
New complexes of the formulae K3[RhL
3]·2 H2O, [PdL]·H2O and [M(LH2)Cl2] [whereM = Pd, Pt andLH2 = bis(o-aminobenzenesulfonyl)ethylenediamine] have been prepared and characterized by conductivity measurements, thermogravimetric analysis, X-ray powder patterns and IR, Ligand Field and1H-NMR spectroscopy.
Rhodium(III), Palladium(II)- und Platin(II)-Komplexe mit Bis(o-aminobenzolosulfonyl)ethylendiamin (Kurze Mitteilung)
Zusammenfassung Neue Komplexe der allgemeinen Formeln K3[RhL 3]·2H2O, [PdL]·H2O und [M(LH2)Cl2] mitM = Pd, Pt undLH2 = Bis(o-aminobenzolosulfonyl)ethylendiamin wurden dargestellt und mit Konduktionsmessungen, thermogravimetrischen Analysen, Röntgenstrukturanalysen, IR, Ligandfeld- und1H-NMR-Spektroskopie charakterisiert.相似文献
15.
界面缩聚法合成双(烯基环戊二烯基)钛(锆)聚醚的研究 总被引:1,自引:0,他引:1
本文通过界面缩聚法利用双(烯基环戊二烯基)钛(锆)二氯化物与二酚反应,制成了16个新的高分子化合物,对它们进行了IR、TGA和分子量的测定。文中还对反应条件与分子量的关系进行了讨论。 相似文献
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Bis(cyclopentadienyl)samarium(II) has been shown to be insoluble in thf : ether mixtures, hence it cannot be isolated as a soluble product from the reaction of samarium with HgCp2 in thf : ether. 相似文献
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A. S. Balueva A. S. Dokuchaev S. R. Prokhorova A. P. Filippova G. N. Nikonov 《Russian Chemical Bulletin》1993,42(8):1381-1384
X-Ray study of the (3,5-diallylisocyanuratomethyl)bis(chloromethyl)phosphine oxide showed that the phosphorylmethyl group is bonded to the nitrogen atom of the cycle. Reaction of the tris(chloromethyl)phosphine sulfide with sodium diallylisocyanurate gave (3,5-diallylisocyanuratomethyl)bis(chloromethyl)phosphine sulfide, and treatment of the tris(3,5-diallylisocyanuratomethyl)phosphine oxide with phosphorus pentasulfide gave a tris(3,5-diallylisocyanuratomethyl)bis(chloromethyl)phosphine sulfide.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 8, pp. 1446–1448, August, 1993. 相似文献
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基于铁和锰的双核配合物在生物氧化还原过程中的重要作用及在化学的氧化还原过程中可能做为催化剂的应用前景,本文合成了两个新的以氯醌酸二价阴离子为桥联配体的Fe(Ⅲ)双核和Mn(Ⅱ)双核配合物:[Fe_2(phen)_4(μ-CA)](ClO_4)_4·2H_2O(1)和[Mn_2(phen)_4(μ-CA)](ClO_4)_2·3H_2O(2)(phen=1,10菲咯啉;CA=氯醌酸二价阴离子)。经元素分析、IR、电子光谱及磁性等测定,对两配合物进行了表征。 相似文献
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Some novel (diorgano)chloro(4-chlorobutoxy)silanes were obtained by the reaction of dichlorodiorganosilanes with tetra hydrofuran in the presence of chloroplatinic acid.Translated fromIzvestiva Akademii Nauk. Seriya Khimicheskaya, No. 4, pp. 943–945, April, 1996. 相似文献
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The new title compound 4-chloro-N-(2-(2-nitrophenyl)acetoxy)-N-(m-tolyl)benzamide(C22H17ClN2O5, Mr = 424.82) has been synthesized via the reaction of 4-chloro-N-hydroxy-N-(m-tolyl)benzamide with 2-(2-nitrophenyl)acetyl chloride. The structure of the product was confirmed by 1H NMR, 13 C NMR, IR, HRMS(ESI) and single-crystal X-ray diffraction. The title compound crystallizes in the monoclinic system, space group P21/c with a = 13.0269(10), b = 6.7251(6), c = 23.9313(16) , β = 99.931(6)o, V = 2065.1(3) 3, Z = 4, Dc = 1.366 g/cm3, F(000) = 880, μ = 0.221 mm-1, the final R = 0.0600 and wR = 0.1754 for 1981 observed reflections(I 2σ(I)). X-ray analysis indicates that the chloro-phenyl ring(C(10)~C(15)) and the methyl-substituted benzene ring(C(16)~C(21)) are not coplanar with the nitro-substituted benzene ring(C(1)~C(6)), with the dihedral angle to be 70.78° and 63.72°, respectively. Hydrogen bonds C(2)–H(2)···O(2) and C(7)–H(7B)···O(5) are observed. 相似文献