共查询到19条相似文献,搜索用时 56 毫秒
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采用水热法合成了Na_5[B_2P_3O_(13)](NBP)和BaAlBO_3F_2(BABF),确定了合成NBP的最佳反应条件,确立并分析了合成纯相BABF时反应物浓度的适宜配比及其对产物的影响.同时对合成的NBP和BABF进行了XRD、SEM及倍频效应等性质的表征. 相似文献
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Na5[B2P3O13]晶体双晶结构的研究 总被引:1,自引:0,他引:1
采用泡生法和b向籽晶生长出尺寸为22mm×24mm×20mm的透明Na5[B2P3O13]晶体.晶体定向中发现(100)和(001)晶面的一级衍射出现双峰;正交偏光显微镜下观察晶体的(010)切片,看到清晰的明暗条纹;当一束激光正入射(010)切片时,产生衍射现象;用同步辐射白光X射线形貌术拍摄了(100)、(010)和(001)切片的Laue像,观察到了晶体的孪晶结构,再借助(010)切片的化学腐蚀研究,推出该晶体为规则的聚片双晶,其结合面为(001). 相似文献
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以硼酸和有机胺为原料在水溶液体系中合成了一种有机模板硼酸盐[C6N2H18]0.5[B5O6(OH)4](1a),通过X射线单晶衍射仪对其晶体结构进行了检测.此外,对其进行了元素分析、X射线粉末衍射、红外光谱、热重差热分析及固态荧光光谱等表征.结果表明,该化合物属单斜晶系,空间群为P21/n,晶胞参数为a=0.8593(2) nm,b=1.4015(4) nm,c=1.0293(3) nm,β=104.723(3)°,V=1.1989(6) nm3,Z=4.阴离子基团[B506 (OH)4]-通过强的氢键连接形成具有三种不同形状孔道的新颖三维超分子骨架结构.该化合物在波长为248 nm的激发光下,发射出最大发射波长为375 nm的紫外光.对化合物进行不同温度的热处理后,其荧光性质发生了明显的变化. 相似文献
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水热法合成α-Al2O3晶体的晶面形态 总被引:4,自引:1,他引:3
本文研究了高温高压水热法合成α-Al2O3晶体的形状和表面形态.原料为Al(OH)3,矿化剂的浓度为1M KBr、0.1 M KOH,填充度35;, 温度388℃时,可部分自发生成α-Al2O3晶体.温度超过395℃以上,可全部转化成α-Al2O3晶体,晶体形状为六棱柱体,显露底面{0001}和柱面{21 10}、{1120}、{1210},晶体的表面呈现阶梯.在矿化剂为1M KOH,填充度35;,温度为380℃时,部分自发生成α-Al2O3晶体,晶体的底面{0001}和柱面{1120}消失,呈现双锥形;当温度达到395℃时,可全部转化成α-Al2O3晶体,晶体呈双锥形,晶面呈条状阶梯形;温度达到405℃以上,晶体又呈现六棱柱体. 相似文献
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磁性Fe3O4六方片状晶体和单晶纳米棒的水热合成 总被引:1,自引:1,他引:0
本文分别以FeSO4·7H2O、(NH4)2Fe(SO4)2·6H2O和NaOH、NH3·H2O为原料,以KClO4与KNO3为氧化剂,采用水热合成法分别合成出Fe3O4六角片状晶体和单晶纳米棒.产物分别用X射线衍射仪(XRD)谱图、透射电子显微镜(TEM)、选区电子衍射(SAED)谱图以及磁滞回线图谱加以表征.结果表明,反应物原料及氧化剂的选择对Fe3O4单晶的制备及其形态的影响至关重要.反应温度控制在110℃,时间为14h.室温下,Fe3O4六方片状晶体和单晶纳米棒的磁化率(Ms)和矫顽力(Hc)均有所区别. 相似文献
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研究了对全取代环戊基六元瓜环(CyP6Q6)与结构诱导剂ZnCl2在稀盐酸条件下长的晶体进行X-射线单晶衍射分析.通过实验得到一个新的晶体,其结构表明,晶体属于斜方晶系,空间群为P21/n,a=27.599(7)(A),6=17.393(7)(A),c=18.265(5)(A),α=90.00°,β=93.369(6)°,γ=90.00°,Z=4,R=0.046,其中结构中出现了蜂巢效应并且形成了较大的孔道. 相似文献
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由过渡金属Cu(Ⅱ)、苯妥英(Hpht)与苄胺(ba)反应,得到一种新型双核铜配合物[Cu(pht)_2(ba)_2]_2,通过元素分析、摩尔电导、红外光谱、X-射线单晶衍射等对配合物的结构进行了解析和表征.结果表明:该晶体属三斜晶系,空间群为P_1~-,晶胞参数:a=1.0554(15) nm,b=1.201(17) nm,c=1.489(2) nm,α=93.24(2) °,β=102.14(2) °,γ=91.79(2) °,V=1.840(5) nm~3,F(000)=814,Z=1,Dc=1.408 g·cm~(-3),μ=0.648 mm~(-1),R_1=0.0973, wR_2=0.1929.配合物分子中每个Cu(II)离子以N4O1的五配位形式位于变形的三角双锥构型中.利用琼脂扩散法测试了该配合物的抑菌活性,结果表明对4种受试细菌均有一定的活性. 相似文献
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本文采用水热合成法制备了一维无机-有机杂化材料[Ni(2,2'-bipy)2]V2O6(1).反应起始原料摩尔配比为:Ni(Ac)2·H2O:NaVO3:H3BO3:B2O3:2,2-联吡啶:H2O=0.5:1:2.3:2:1.5:556.l属单斜晶系,P21/c空间群,晶胞参数:a=1.4482(3)nm,b=1.3747(3)nm,c=1.0456(2)nm,β=100.25(3)°,V=2.0484(7)nm3,Z=4.1是由VO4四面体通过共顶点联接构成一维链状结构.相邻链的2,2'-bipy分子的π-π相互作用对1分子的结构稳定起到重要的作用. 相似文献
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A supramolecular complex [Na(DC18C6-B)][Ni(mnt)2] (1) (DC18C6-B = cis-anti-cis-dicyclohexyl-18-crown-6, isomer B; mnt = maleonitriledithiolate) has been prepared and characterized by elementary analysis, FT-IR spectroscopy and X-ray single crystal diffraction. It crystallizes in triclinic, space group P1 with crystallographic data: a = 7.974(4) Å, b = 14.343(7) Å, c = 15.559(8) Å, α = 96.230(8)∘, β = 100.361(8)∘, γ = 93.849(9)∘, V = 1733.2(15) Å3, Z = 2, Dcalcd = 1.408 g/cm3, F(000) = 766, R1 = 0.0491, wR2 = 0.1018. The formula unit contains one [Na(DC18C6-B)]+ complex cation and one [Ni(mnt)2]− complex anion, which are constructed into an infinite chain-like structure through Na–N bonds. The resulting chains crisscross on the [Ni(mnt)2]− complex anions and further assemble into an unusual 3D supramolecular framework via the weak interactions. 相似文献
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本文采用水热合成法制备了一维无机-有机杂化材料[Ni(2,2'-bipy)2]V2O6(1)。反应起始原料摩尔配比为:Ni(Ac)2.H2O:NaVO3:H3BO3:B2O3:2,2'-联吡啶:H2O=0.5:1:2.3:2:1.5:556。1属单斜晶系,P21/c空间群,晶胞参数:a=1.4482(3)nm,b=1.3747(3)nm,c=1.0456(2)nm,β=100.25(3)o,V=2.0484(7)nm3,Z=4。1是由VO4四面体通过共顶点联接构成一维链状结构。相邻链的2,2'-bipy分子的π-π相互作用对1分子的结构稳定起到重要的作用。 相似文献
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The title compound 1-phenyl-3-methylthio-4-imino-5-allyl-pyrazolo[3,4-d]pyrimidine, C15H15N5S, has been synthesized and characterized by x-ray diffraction: orthorhombic, space group Pbca, with a = 17.3480(9), b = 8.5022(5), c = 19.8132(11) Å. Z = 8, V = 2922.4(3) Å3. The compound shows a fully delocalized pyrazolo[3,4-d]pyrimidine system with a sp2 hybridization of the N(4) atom. 相似文献
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在中温水热反应条件下,以CoCl2·6H2O、2,6-萘二羧酸(2,6-pda)和4,4'-bpy为原料,合成了一种二维互穿配位聚合物[Co3(2,6-nda)3(4,4'-bpy)1.5]n晶体,对其进行了元素分析、红外光谱表征、TGA-GTA分析和X射线单晶衍射测定.该配位聚合物属单斜晶系,C2/m空间群,晶胞参数为a=1.7285(11)nm,b=1.9965(13)nm,c=1.3994(9)nm,α=90°,β=95.822(11)°,γ=90°,V=4.804(5)nmm3,Z=4,dc=1.457g/cm3,μ=1.089mm-1,F(000)=2136,R1=0.0594,wR2=0.1605.结果显示形成一个二维互穿的网络结构. 相似文献
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新型配位聚合物[Ni(C6H4NO2)2(H2O)4]n的水热合成和晶体结构 总被引:4,自引:4,他引:0
以NiCl2·6H2O和4-氰基吡啶为原料,在中温水热反应条件下,合成了一种新型配位聚合物[Ni(C6H4NO2)2(H2O)4]n单晶体,并对其进行了元素分析、红外光谱表征和X射线单晶衍射测定.该配位聚合物属三斜晶系,P-1空间群,a=0.6298(4)nm,b=0.6907(4)nm,c=0.9243(5)nm,α=96.437(8)°,β=105.184(9)°,γ=113.314(9)°,V=0.3456(3)nm3,Z=2,dc=1.802 g/cm3,μ=1.452mm-1,F(000)=194,R1=0.0309,R2=0.0753.该晶体通过配位键的连接和分子间氢键相互作用形成三维的网状结构. 相似文献
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The reaction of thiols with the heterocyclic compound 2,3-dichloropyrrolo[1,2-a] benzimidazol-1-one (1) has been investigated as a route to new redox-active, bidentate sulfur ligands. Treatment of 1 with either methylthiol or benzylthiol in the presence of pyridine affords monosulfide compounds 2-chloro-3-methylthiopyrrolo[1,2-a] benzimidazol-1-one (2) and 2-chloro-3-benzylthiopyrrolo[1,2-a]benzimidazol-1-one (3) and the disulfide derivatives 2,3-di(methylthio)pyrrolo[1,2-a]benzimidazol-1-one (4) and 2,3-di(benzylthio)pyrrolo[1,2-a]benzimidazol-1-one (5). The substitution of the first chlorine group in 2,3-dichloropyrrolo[1,2-a]benzimidazol-1-one (1) occurs regioselectively at C-3 to produce 2-chloro-3-methylthiopyrrolo[1,2-a]benzimidazol-1-one (2) and 2-chloro-3-benzylthiopyrrolo[1,2-a]benzimidazol-1-one (3), followed by replacement of the remaining chlorine group to furnish the disulfide compounds 4 and 5. The new thiols have been isolated by column chromatography and characterized in solution by spectroscopic methods. The molecular structures of 2-chloro-3-methylthiopyrrolo[1,2-a]benzimidazol-1-one and 2,3-di(benzylthio)pyrrolo[1,2-a]benzimidazol-1-one have been determined by X-ray crystallography. Compound 2 crystallizes as two independent molecules in the monoclinic space group P21/c, a = 13.221(2) Å, b = 18.478(2) Å, c = 8.948(1) Å, = 100.088(3)°, V = 2152.3(5) Å3, Z = 8, and dcalc = 1.547 Mg/m3; R = 0.0354, Rw = 0.0739 for 2820 reflections with I > 2(I). Compound 5 crystallizes in the triclinic space group P-1, a = 5.180(1) Å, b = 11.494(2) Å, c = 17.243(3) Å, = 86.024(3)°, = 88.606(4)°, = 81.235(3)°, V = 1012.1(4) Å3, Z = 2, and dcalc = 1.360 Mg/m3; R = 0.0354, Rw = 0.0692 for 2655 reflections with I > 2(I). The redox properties of the disulfide compounds 4 and 5 have been explored by cyclic voltammetry, where a one-electron reduction at ca. –1.10 V has been observed for each compound. The site of electron accession in has been established by carrying out molecular orbital calculations at the extended Hüuckel level on the model compound 2,3-di(thio)pyrrolo[1,2-a]benzimidazol-1-one. 相似文献