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Synthesis and characterization of novel intercalation compounds of molybdenum trioxide and molybdenum disulfide.

机译:三氧化钼和二硫化钼新型嵌入化合物的合成与表征。

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Conductive polyaniline has been intercalated into MoO{dollar}sb3{dollar}. This was accomplished by first inserting aniline into MoO{dollar}sb3{dollar} in the presence of a trace amount of H{dollar}sb2{dollar}O, forming (C{dollar}sb6{dollar}H{dollar}sb5{dollar}NH{dollar}sb3sp{lcub}+{rcub})sb{lcub}rm x{rcub}{dollar}MoO{dollar}sb3{dollar} (d-spacing: 20.1 A), which upon oxidation with (NH{dollar}sb4)sb2{dollar}S{dollar}sb2{dollar}O{dollar}sb8{dollar} yielded (PANI){dollar}sb{lcub}rm x{rcub}{dollar}MoO{dollar}sb3{dollar} (d-spacing: 13.7 A). The room temperature conductivity of (PANI){dollar}sb{lcub}rm x{rcub}{dollar}MoO{dollar}sb3{dollar} is 0.003 S/cm which is three orders of magnitude higher than its precursor phase. Thermopower data show that (PANI){dollar}sb{lcub}rm x{rcub}{dollar}MoO{dollar}sb3{dollar} is a p-metal, suggesting that the intercalated polymer is playing a more important role in the charge transport of the composite material.; Polyaniline, poly(ethylene-oxide), poly(propylene glycol), methyl cellulose, poly(ethylenimine poly(vinylpyrrolidinone), Nylon-6 and poly(ethylene) have been encapsulated into MoS{dollar}sb2{dollar}. This was achieved by addition of the polymer solutions to aqueous suspensions of single layers of MoS{dollar}sb2{dollar}. This causes flocculation during which the MoS{dollar}sb2{dollar} layers sandwich the polymer chains to give well-ordered single phase products. The d-spacings of these intercalation compounds range from 10.3 A in (polyethylene){dollar}sb{lcub}3.0{rcub}{dollar}MoS{dollar}sb2{dollar} to 21.1 A in (PVP){dollar}sb{lcub}0.76{rcub}{dollar}MoS{dollar}sb2{dollar}. The intercalation compounds were found to be conductive with the exception of (Nylon-6){dollar}sb{lcub}3.6{rcub}{dollar}MoS{dollar}sb2{dollar} and (polyethylene){dollar}sb{lcub}3.0{rcub}{dollar}MoS{dollar}sb2{dollar}. The conductivity of the other polymer-intercalated phases were in the range of 0.1-0.0004 S/cm. Four-probe electrical conductivity and thermopower measurements of pressed pellets of (PANI){dollar}sb{lcub}0.35{rcub}{dollar}MoS{dollar}sb2{dollar}, (PEI){dollar}sb{lcub}0.83{rcub}{dollar}MoS{dollar}sb2{dollar} and (PEO){dollar}sb{lcub}1.0{rcub}{dollar}MoS{dollar}sb2{dollar} show that the charge transport in these materials is p-metallic. Below 9 K, the conductivity and thermopower of (PANI){dollar}sb{lcub}0.35{rcub}{dollar}MoS{dollar}sb2{dollar} indicate a sudden transition to the insulating state. (PEO){dollar}sb{lcub}1.0{rcub}{dollar}MoS{dollar}sb2{dollar} and (PEI){dollar}sb{lcub}0.83{rcub}{dollar}MoS{dollar}sb2{dollar} also show a metal to insulator transition, at low temperatures. The metal to insulator transition in these polymer/MoS{dollar}sb2{dollar} nanocomposites is new, since it is not known for either the polymers or MoS{dollar}sb2{dollar}.; Molecular clusters of the general formula, Co{dollar}sb6{dollar}Q{dollar}sb8{dollar}(PR{dollar}sb3)sb6{dollar}, where Q = S, Se, Te and R = ethyl, n-butyl and phenyl have been intercalated into MoS{dollar}sb2{dollar}. This was accomplished by using the exfoliation and restacking property of MoS{dollar}sb2{dollar}. The new inclusion solids have well-defined interlayer spacings depending on the encapsulated cluster. For the Co{dollar}sb6{dollar}Q{dollar}sb8{dollar}(PPh{dollar}sb3)sb6{dollar} cluster, the interlayer spacing varies from 21.5 A in (Co{dollar}sb6{dollar}S{dollar}sb8{dollar}(PPh{dollar}sb3)sb3rbracksb{lcub}0.093{rcub}{dollar}MoS{dollar}sb2{dollar} to 10.9 A in (Co{dollar}sb6{dollar}S{dollar}sb8{dollar}) {dollar}sb{lcub}0.03{rcub}{dollar}MoS{dollar}sb2{dollar}. The surface area of (Co{dollar}sb6{dollar}Se{dollar}sb8{dollar}(PEt{dollar}sb3)sb{lcub}rm y{rcub}{dollar}) {dollar}sb{lcub}0.06{rcub}{dollar}MoS{dollar}sb2{dollar} was found to be 14.2 m{dollar}sp2{dollar}/g and upon removal of the residual phosphine ligands the surface area value increased to 22.1 m{dollar}sp2{dollar}/g
机译:导电聚苯胺已插入MoO {dollar} sb3 {dollar}中。这是通过先在痕量的H {dollar} sb2 {dollar} O存在下将苯胺插入MoO {dollar} sb3 {dollar}中,形成(C {dollar} sb6 {dollar} H {dollar} sb5 {美元} NH {dollar} sb3sp {lcub} + {rcub})sb {lcub} rm x {rcub} {dollar} MoO {dollar} sb3 {dollar}(d-spacing:20.1 A),在与(NH {dollar} sb4)sb2 {dollar} S {dollar} sb2 {dollar} O {dollar} sb8 {dollar}产生(PANI){dollar} sb {lcub} rm x {rcub} {dollar} MoO {dollar} sb3 {美元}(d间距:13.7 A)。 (PANI){sb {lcub} rm x {rcub} {Motor {dollar} sb3 {dollar}的室温电导率为0.003S / cm,比其前体相高三个数量级。热电数据表明(PANI){sb {lcub} rm x {rcub} {美元} MoO {美元} sb3 {美元}是一种p金属,这表明插层聚合物在电荷中起着更重要的作用复合材料的运输。聚苯胺,聚环氧乙烷,聚丙二醇,甲基纤维素,聚乙烯亚胺基聚乙烯吡咯烷酮,尼龙6和聚乙烯被封装在MoS {dollar} sb2 {dollar}中。通过将聚合物溶液添加到单层的MoS {s}} sb2 {dollar}的水悬浮液中,会导致絮凝,在此过程中,MoSs {s} sb2 {dollar}层将聚合物链夹在中间,从而得到有序的单相产物。这些插层化合物的d间距范围从(聚乙烯){dol} sb {lcub} 3.0 {rcub} {dollar} MoS {dollar} sb2 {dollar}的10.3 A到(PVP){dollar} sb { lcub} 0.76 {rcub} {dollar} MoS {dollar} sb2 {dollar}。除(Nylon-6){dollar} sb {lcub} 3.6 {rcub} {dollar} MoS之外,发现插层化合物具有导电性{美元} sb2 {美元}和(聚乙烯){美元} sb {lcub} 3.0 {rcub} {美元} MoS {美元} sb2 {美元}。其他聚合物插层相的电导率在0.1- 0.0004 S / cm。四探针(PANI){dol} sb {lcub} 0.35 {rcub} {dollar} MoS {dollar} sb2 {dollar},(PEI){dollar} sb {lcub} 0.83 {rcub}的压丸的电导率和热功率测量{dollar} MoS {dollar} sb2 {dollar}和(PEO){dollar} sb {lcub} 1.0 {rcub} {dollar} MoS {dollar} sb2 {dollar}表明这些材料中的电荷传输是p-金属的。在9 K以下,(PANI){sdol} sb {lcub} 0.35 {rcub} {smol} MoS {dols} sb2 {dollar}的电导率和热功率表明突然转变为绝缘状态。 (PEO){dollar} sb {lcub} 1.0 {rcub} {dollar} MoS {dollar} sb2 {dollar}和(PEI){dollar} sb {lcub} 0.83 {rcub} {dollar} MoS {dollar} sb2 {dollar }还显示了在低温下金属向绝缘体的转变。在这些聚合物/ MoS {smol} sb2 {dollar}纳米复合材料中,金属向绝缘体的转变是新的,因为对于聚合物或MoSs {dollar} sb2 {dollar}都不知道。通式为Co {dollar} sb6 {dollar} Q {dollar} sb8 {dollar}(PR {dollar} sb3)sb6 {dollar}的分子簇,其中Q = S,Se,Te和R =乙基,n-丁基和苯基已插入MoS {dollar} sb2 {dollar}中。这是通过使用MoS {dollar} sb2 {dollar}的去角质和重新堆积特性来完成的。新的夹杂物固体具有明确的层间间距,具体取决于封装的簇。对于Co {dollar} sb6 {dollar} Q {dollar} sb8 {dollar}(PPh {dollar} sb3)sb6 {dollar}簇,层间距在(Co {dollar} sb6 {dollar} S {美元} sb8 {dollar}(PPh {dollar} sb3)sb3rbracksb {lcub} 0.093 {rcub} {dollar} MoS {dollar} sb2 {dollar}至10.9 A in(Co {dollar} sb6 {dollar} S {dollar} sb8 {dollar}){dollar} sb {lcub} 0.03 {rcub} {dollar} MoS {dollar} sb2 {dollar}。(Co {dollar} sb6 {dollar} Se {dollar} sb8 {dollar}(PEt {dollar} sb3)sb {lcub} rm y {rcub} {dollar}){dollar} sb {lcub} 0.06 {rcub} {dollar} MoS {dollar} sb2 {dollar}被发现是14.2 m {dollar} sp2 {dollar} / g,除去残留的膦配体后,表面积值增加到22.1 m {dollar} sp2 {dollar} / g

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