共查询到19条相似文献,搜索用时 672 毫秒
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近年来,有关过渡金属离子冠醚配合物的研究虽有一些报道,但这些研究所涉及的配体大多数是单取代苯并冠醚,对双取代苯并冠醚配位的研究则很少。为了进一步弄清取代冠醚对过渡金属配位性能的影响,我们研究了混合双取代的苯并-15-冠-5,根据文献[2,3]合成了4′-溴-5′-硝基苯并-15-冠-5,并制得了一种新的配合物FeCl_3·L,经性质证明此配合物是1:1型非溶剂合、不含水的固体配合物,其三个Cl~-离子位丁配合物的外界。 相似文献
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芳香桥式双(苯并氮杂-15-冠-5)的合成及其对碱金属和重金属离子的选择键合 总被引:1,自引:0,他引:1
通过11,12-苯并-1,7,10,13-四氧杂-4-氮杂环十五烷-11-烯(苯并氮杂-15-冠-5)分别与间二苄溴, 间苯二甲酰氯和对苯二甲酰氯反应, 合成了N,N'-间二苄基双(苯并氮杂-15-冠-5) (1)、N,N'-间苯二甲酰基双(苯并氮杂-15-冠-5) (2)和N, N'-对苯二甲酰基双(苯并氮杂-15-冠-5) (3) 等三个芳香桥式双(苯并氮杂-15-冠-5)衍生物, 并解析了化合物3的晶体结构. 进而采用溶剂萃取的方法研究了它们与一价金属阳离子的键合行为. 结果表明, 双冠醚2对碱金属钠离子和重金属铊离子表现出较高的选择萃取能力, 而双冠醚1对重金属银离子表现出较高的选择萃取能力. 相似文献
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Synthesis and Cation Recognition Study of Novel Benzo Crown Ether Functionalized Enamine Derivatives
Dayanand R. Patil Dattatraya R. Chandam Abhijeet G. Mulik Suryabala D. Jagdale Prasad P. Patil 《合成通讯》2013,43(16):1902-1911
A novel series of benzo crown ether (dibenzo 18-crown-6 ether, benzo 18-crown-6 ether, and benzo 15-crown-5 ether) functionalized enamines derivatives from amino benzo crown ether (4-amino dibenzo 18-crown-6 ether, 4-amino benzo 18-crown-6 ether, 4-amino benzo 15-crown-5 ether) and substituted 3-(dimethylamino)-1-phenylprop-2-en-1-one compounds have been synthesized. All the synthesized compounds were characterized by infrared, 1H NMR, 13C NMR, distortionless enhancement polarization transfer, and mass and elemental analysis techniques. The cation recognition property for benzo crown ether enamine 8a was studied by absorption and fluorescence spectroscopy. 相似文献
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吡喃酮是许多天然产物的结构单元,我们曾由4-异丁酰基庚二酸在过量醋酸酐及乙酰氯存在下回流得到7-氧代-8,8-二甲基-△~9-六氢香豆素.本文由二氰乙基-β-二酮进行酮解水解反应得到4-酰基庚二酸1_(a-c)。 在过量醋酸酐、乙酰氯存在下由1_a、1_c为底物进行反应没有得到双环的香豆素衍生物.其产物和单纯以乙酐为缩合剂时的产物2_a、2_c相同,产率分别为68%、63%。2_c可在硫酸铁催化 相似文献
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Dutot L Gaucher A Elkassimi K Drapeau J Wakselman M Mazaleyrat JP Peggion C Formaggio F Toniolo C 《Chemistry (Weinheim an der Bergstrasse, Germany)》2008,14(10):3154-3163
A new set of beta-amino acids that carry various crown ether receptors on their side chains of the general formula (S)-beta(3)-HDOPA(crown ether) (HDOPA: homo-3,4-dihydroxyphenylalanine; (crown ether): [15]crown-5 ([15-C-5]), [18]crown-6 ([18-C-6]), [21]crown-7 ([21-C-7]), 1,2-Benzo-[24]crown-8 ([Benzo-24-C-8]) and (R)-Binol-[20]crown-6 ([(R)-Binol-20-C-6])) was prepared. Peptides that are based on these new crowned beta-amino acids combined with (1S,2S)-ACHC (2-aminocyclohexanecarboxylic acid), which is known to be a potent 3(14)-helix inducer, to the hexamer level, with two crowned residues at the i and i+3 positions of the main-chain, were synthesized in solution by stepwise coupling using Boc-N(alpha)-protection (Boc: tert-butoxycarbonyl) and the EDC/HOAt C-activation method. Their conformational analysis was performed by using FTIR absorption, NMR and CD spectroscopy techniques. Our results are in full agreement with a 3(14)-helix conformation. 相似文献
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一种新型低带隙共轭聚合物的合成及其光学性质 总被引:2,自引:0,他引:2
在钯催化剂作用下, 通过4,7-二(5-溴-2-噻吩基)[2,1,3]苯并噻二唑与2,5-二乙炔基-3-辛基噻吩的偶联反应, 合成了一种新的共轭高分子聚4,7-二(2-噻吩基)苯并噻二唑-3-辛基噻吩二炔(PTE-DTBT). 通过紫外可见吸收光谱及荧光光谱对其光学性质进行了研究. 紫外-可见吸收谱结果表明, PTE-DTBT的固体膜光学带隙为1.71 eV; 电化学测试其带隙为1.88 eV. TiO2/PTE-DTBT共混固体膜的荧光发射谱结果表明电子供体PTE-DTBT分子与电子受体TiO2分子间存在有效的电子转移. 相似文献
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Eight new 1-o-chlorobenzoyl-3-(5'-substituted phenylamino-6'-phenyl)-1',2',4'-triazinyl ureas (5a-h) have been synthesized and their bioactivities were detected. 相似文献
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The 4-acetylaminobenzo[15]crown-5 is an important intermediate in the synthesis of crown ether cyanine dyes1, in addition, the acetylamino can easily be hydrolyzed to be amine2, to our knowledge which also is an usful intermediate3,4, The classical procedure for the synthesis of 4-acetylaminobenzo[15]crown-5 involves several steps2,5: typically nitration of the benzo[15]crown-5, followed by reduction of the introduced nitro group to form amine, and finally, acylation of the amine to give the am… 相似文献
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Xiaoming He Wai Han Lam Nianyong Zhu Vivian Wing‐Wah Yam 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(35):8842-8851
Two calixarene‐based bis‐alkynyl‐bridged AuI isonitrile complexes with two different crown ether pendants, [{calix[4]arene‐(OCH2CONH‐C6H4C≡C)2}{Au(CNR)}2] (R=benzo[15]crown‐5 ( 1 ); R=benzo[18]crown‐6 ( 2 )), together with their related crown‐free analogue 3 (R=C6H3(OMe)2‐3,4) and a mononuclear gold(I) complex 4 with benzo[15]crown‐5 pendant, have been designed and synthesized, and their photophysical properties have been studied. The X‐ray structure of the ligand, calix[4]arene‐(OCH2CONH‐C6H4C?CH)2 has been determined. The cation‐binding properties of these complexes with various metal ions have been studied using UV/Vis, emission, 1H NMR, and ESI‐MS techniques, and DFT calculations. A new low‐energy emission band associated with Au???Au interaction could be switched on upon formation of the metal ion‐bound adduct in a sandwich fashion. 相似文献