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金属的电抛光应用越来越广泛.但电抛光机理至今仍不很清楚.我们曾用 XPS 和AES 研究了不同槽电压下电抛光铜表面的组成和物种,确认其表面均为纯铜,不存在含磷固体膜.本文用 XPS 研究电抛光液中1-羟基乙叉-1,1-膦酸(HEDP)浓度、抛光液的 pH 及其接受体(H_3PO_4,HEDP 和 HEDP H_3PO_4)变化时铜的表面组成,并进一步证明,电抛光时形成的粘液膜是水溶性膜,铜表面在不同抛光条件下并不形成难溶的含磷固体膜.通过电子能谱对固化后粘液膜组成和深度分布的研究确定,粘液膜可能是铜的多核聚合混合配体配合物,其组成可近似地表示为[Cu_4(PO_4)(HEDP)]_n. 相似文献
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新型的工业用水缓蚀剂——有机多元膦酸 总被引:1,自引:0,他引:1
有机多元膦酸是今天工业用水中用的最多而又年轻的一类缓蚀剂。本文介绍了其命名和分类,分析了其结构与其缓蚀性能的关系。通过对有机多元膦酸发展的展望,指出一方面合成高效、低毒、价廉的水系统有机多元膦酸仍是今后人们努力的方向,另一方面加强对有机多元膦酸缓蚀机理的研究也逐步引起了人们的注意。 相似文献
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Zirconium 1,4-butylenediphosphonate[Zr(BDPA)] multilayers on a 3-mercaptopropylphosphonate-coated gold electrode were prepared by the conventional layer-by-layer method. The stability of the Zr(BDPA) multilayers in different supporting electrolyte solutions was studied by cyclic voltammetry(CV) and X-ray photoelectron spectroscopy(XPS) measurements. The results show that the Zr(BDPA) multilayers are very stable in 0.2 mol·L-1 KCl, 0.2 mol·L-1 KNO3 and low concentration phosphate buffer solution(PBS) with low pH values(c≤0.05 mol·L-1, pH≤6.8). While in high concentration 0.2 mol·L-1 PBS(pH=5.2~7.4), the Zr(BDPA) multilayers will be partially desorbed within two days, possibly due to the formation of more stable zirconium phosphate. 相似文献
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一个新的具有梯子型链状结构的有机二膦酸铜化合物的合成和结构 总被引:2,自引:0,他引:2
0IntroductionThemetalphosphonatechemistryhasbeenofin-creasinginterestinthepastdecadeduetotheirpoten-tialapplicationsinionexchanges,adsorptionsandsensors犤1~4犦.Anumberofphosphonatecompoundshavebeenprepared,amongwhichthecoppercompoundsareuniquebecauseoftheversatilecoordinationcapabilitiesofCuions犤5~7犦.Basedon1-hydroxyethylidenediphosp-honate犤hedp,CH3C(OH)(PO3)2犦,severalcopperph-osphonateshavebeenobtainedinourlaboratoryin-cluding犤NH3(CH2)2NH3犦Cu2(he… 相似文献
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层状钴有机膦酸化合物的合成以及变磁行为 总被引:1,自引:0,他引:1
从配体C6H5CH2N(CH2PO3H2)2 (H4L)出发, 在水热条件下得到了两个层状结构化合物Co2(L)(H2O)2·0.3H2O (1)和Co2(L)(H2O) (2). 在这两个化合物的层结构中分别存在“之”字型和“蝴蝶”型的{Co4O6}四核簇结构单元, 相邻四核通过O-P-O桥连形成二维无机层状结构, 有机基团位于层与层之间. 磁性测试表明, 化合物1中存在反铁磁耦合, 并且在低温下表现出场致变磁行为; 我们还对化合物1的脱水样品(1-de)进行了磁性测试, 测试结果表明化合物1-de存在自旋翻转现象. CCDC: 908112 (1), 908113 (2). 相似文献
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在水热条件下, 以6-羟基-2-吡啶基膦酸为主配体, 4, 4′-联吡啶(bpy)及1, 2-二(4-吡啶基)乙烯(bpe)为桥联配体, 合成了2个铜膦酸配位聚合物[Cu3(L)2(bpy)2(H2O)2]· 2H2O (1), [Cu3(L)2(bpy)2(H2O)3]· 2H2O (2)。配合物1中, Cu2+离子由膦酸配体连接成一条链, 该链由bpy桥联成二维层, 层与层之间通过氢键作用构成三维结构。配合物2与配合物1是同构的, 桥联配体是bpe。磁性研究表明, 配合物1与2中铜离子之间存在反铁磁性耦合。 相似文献
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XPS和AES研究锡表面的防变色膜 总被引:2,自引:0,他引:2
通过比较多种防锡变色剂的防变色效果,发现乙二胺四甲叉膦酸(EDTMP)是一种优良的防锡变色剂。用XPS、AES及Raman光谱探讨了EDTMP的防变色机理,结果表明EDTMP在锡表面形成了一种耐蚀性保护膜。在深度剖析曲线的元素组成近似恒定区测得膜的相对原子浓度(A.C.%)为:O 48.0%;Sn 10.7%;N 7.7%;C 23.1%;P 10.5%。 相似文献
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《Journal of Coordination Chemistry》2012,65(1-2):183-192
Abstract The structures of Cu(II) 3-furancarboxylate and Cu(II) 2-thiophenate denoted hereafter as Cu-3F and Cu-2T, respectively, were determined. The structures are dinuclear, bridged by bidentate ligands. The coordination about copper is square pyramidal. The pKa of the respective acids is a factor influencing changes in Cu-Cu distances. The differences in hydrogen bond patterns and packing are described. 相似文献
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The coordination polymerization of benzotriazole with metallic copper has been investigated by infrared and X-ray photoelectron spectroscopies. We found that benzotriazole could react with copper (0) under mild conditions to form bis (benzotriazolato) copper (Ⅱ) and benzotriazolato copper (Ⅰ)which covered the surface of copper metal in the shape of polymeric materials. Since benzotriazole is of great interest as a ligand in that its presence in many biological system with metal ions, and is considered as a corrosion inhibitor, this work will be in favour of the study of protective corrosion. 相似文献
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研究了聚乙烯醇缩对甲酰基苯偶氮变色酸(Polyvinylalcoholcondensedpoformylphenylazochromotropicacid,称PVA·FPAC)的结构与性能。结果表明,小分子试剂甲酰基苯偶氮变色酸(FPAC)高分子化后,性能有了较大的改善;表现为不同聚合度和羟基取代度(聚乙烯醇主链上羟基被取代的程度)的高分子显色剂其性能有较显著的差异;就聚乙烯醇缩对甲酰基苯偶氮变色酸而言,同一聚合度的试剂,羟基取代度越大,溶解性越好,显色反应的灵敏度越高,但对非有机溶剂液-固萃取影响不大;对不同聚合度的试剂,聚合度高的,显色灵敏度和萃取率均有明显提高。 相似文献
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Cu2+与硅酸、硅胶表面硅羟基的反应及其平衡常数 总被引:2,自引:0,他引:2
本文用铜电极法研究 Cu2 和硅酸、硅胶表面硅羟基的反应及其平衡常数 ,结果是 :Cu2 H3 Si O4-Cu H3 Si O 4 K1 =5.0× 1 0 3Cu2 2 H3 Si O4-Cu(H3 Si O4) 2 β2 =6.1× 1 0 8Cu2 Sis- OH Sis- OCu H Ks1 =2 .0× 1 0 -6Cu2 2 Sis- OH ((Sis- O) 2 Cu 2 H βs2 =2 .5× 1 0 -1 2 相似文献
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J. Mu X. S. Feng J. Y. Li K.Z. Yang T. F. Chen L. Jiang 《Journal of Dispersion Science and Technology》2013,34(3):243-249
Dispersion characteristics of the monomolecular films of hematoporphyrin mixed with stearic acid has been studied. The average molecular areas of mixed monolayers coincided approximately with the ideal additivity rule when the“solid” films were extrapolated to zero surface pressure. The orientation of the macrocycles was given by infrared dichroism with the tilting angle of 10. 1° to the plane of the film. The SERS of LB films deposited on silver island films was observed- The results showed that there are two possible contribution, i. e., electromagnetic and chemical interaction between the hematoporphyrin molecules and Ag island films. 相似文献