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1.
汉麻杆基活性炭表面织构与储氢性能的研究   总被引:2,自引:0,他引:2       下载免费PDF全文
以天然汉麻杆为原料,采用KOH化学活化的方法改变活化时间制备出了高比表面积活性炭,并且对其表面进行硝酸氧化处理,研究活性炭表面化学状态对其吸附性能的影响。采用77 K低温氮气吸附和FTIR对样品进行了表征,并在77 K、100 kPa的条件下测定样品的氢气吸附等温线。结果表明,所有样品具有较高的比表面积(2 435.93~3 240.95 m2·g-1)和总孔容(1.3~1.98 cm3·g-1),且随活化时间的延长而增加,3.5 h达到最大值,之后由于骨架坍塌有所减小。所有样品的孔径分布较为一致呈多峰型分布,主要以小于2 nm的微孔为主,同时含有少量的中孔和大孔。活化3.5 h样品的吸氢量最大,达到3.28wt%。研究发现,吸氢量受比表面积和孔容等参数影响较大,77 K下不仅小于2 nm的微孔对活性炭吸氢行为贡献较大,中孔也有十分重要的影响。样品经硝酸氧化处理后,BET比表面积和总孔容均在一定程度上减小,而氢气吸附量也有所降低。  相似文献
2.
1INTRODUCTIONThecrystalengineeringofmetal-organiccom-plexeswithfunctionalbuildingblocksisofgreatin-terestduetotheirintriguingstructuresandpotentialapplicationsinmaterialsciences[1,2].Thecoord-inationcovalentbond,hydrogenbondorothermolecularinteractionsand…  相似文献
3.
Introduction  Functionalcoordinationpolymersareofgreatinterestduetotheirpotentialapplicationsinmanyareas ,suchasmi croporosity ,electricalconductivity ,molecularmagnetism ,linearopticalbehaviororcatalysis .1 6 Considerableefforthasbeenfocusedonthesupramolecularnetworksassembledbycovalent,hydrogenbonds ,π…πinteractionorotherweakin teractionsowingtotheirfascinatingstructuraldiversityandpotentialapplicationindesignofporousmaterialswithnovelinclusionorreactivitypropertiesandsupramoleculardevi…  相似文献
4.
1 INTRODUCTION The rational design and synthesis of metal-organic coordination polymers have generated considerable interest in supramolecular chemistry and material science owing to their intriguing structural diver- sities and potential applications as functional mate- rials[1~3]. Up to now, some structural motifs with specific topologies and functions have been con- structed through rational combination of organic li- gands containing appropriate coordination sites and metal ions beari…  相似文献
5.
连芬燕  王瑞虎  韩磊  洪茂椿 《结构化学》2005,24(9):1039-1042
1 INTRODUCTION The rational design and synthesis of new metal- organic coordination polymers have generated con- siderable interest in supramolecular chemistry and material science owing to their intriguing structural diversities and potential applications as functional materials[1~3]. Molecular self-assembly has been pro- ved to be an efficient way to construct various inte- resting coordination polymers[4~6]. The coordina- tion covalent bond, hydrogen bond or other mole- cular interact…  相似文献
6.
李有桂  韩磊  马刚  朱成峰 《结构化学》2014,33(11):1610-1616
Reaction of a N-heterocycliccarbene(NHC) containing an anthracene unit and two N-picolyl moieties with Hg(OAc)2 yielded a novel mercury(Ⅱ) complex(1). X-ray studies, UV-vis and fluorescence spectroscopy confirmed that a strong interaction exists between the mercury atom and anthracene unit.  相似文献
7.
秦兰  许兰平  韩磊 《结构化学》2013,32(1):113-119
Two new isomorphous metal-organic coordination polymers, [Zn(dhmdb)(2,2'- bpy)]n 1 and [Zn(dhmdb)(1,10-phen)]n 2, have been obtained under hydrothermal reactions from 4,4'-(dihydroxymethylene)dibenzoic acid (H2dhmdb), Zn(NO3)2·6H2O and 2,2'-pyridine or 1,10- phenanthroline, respectively. Compounds 1 and 2 have been characterized by FT-IR spectroscopy, thermal analysis and single-crystal X-ray diffraction. The zigzag chains of 1 and 2 are linked into three-dimensional supramolecular networks by both O-H…O hydrogen bonds and π…π stacking interactions. Crystal data for 1: ZnC25H18N2O6, Mr = 507.78, orthorhombic, space group Pbca, a = 14.031(3), b = 10.826(2), c = 27.343(6), V = 4153.5(14)3, Z = 8, Dc = 1.624 g/cm3, F(000) = 2080, μ = 1.231 mm-1, R = 0.0699 and wR = 0.1829. Crystal data for 2: ZnC27H18N2O6, Mr = 531.80, orthorhombic, space group Pbca, a = 13.796(3), b = 10.809(2), c = 28.612(6), V = 4266.8(15)3, Z = 8, Dc = 1.656 g/cm3, F(000) = 2176, μ = 1.203 mm-1, R = 0.0454 and wR = 0.1399.  相似文献
8.
含双硫取代碳硼烷二齿配体的半夹心型钴16电子化合物CpCo[S2C2(B10H10)](Co16e)分别与1,4-二乙炔基苯(L1)、(S)-2,2′-二乙酰氧基-6,6′-二乙炔基-1,1′-联萘(L2)、2-溴-5-乙炔基噻吩(L3)和2,5-二乙炔基噻吩(L4)反应,分别得到18电子单核化合物CpCo(S2C2B10H9)(H2CCPhC≡CH)(1),CpCo(S2C2B10H9)[H2CC(C24H16O4)C≡CH](2),CpCo(S2C2B10H9)[H2CC(C4H2S)Br](3),和CpCo(S2C2B10H9)[H2CC(C4H2S)C≡CH](4)。化合物1~4的结构中都发生了金属诱导B-H键活化并生成了新的C-B键。在Co16e与L4的反应中,还得到了两分子炔烃以头对头二聚插入到金属中心的18电子化合物CpCo(S2C2B10H9)[HC≡C(C4H2S)C=CH-CH=C(C4H2S)C≡CH](5)。上述化合物通过NMR、IR、MS、元素分析等方法进行表征。  相似文献
9.
周燕  韩磊  潘建国  李星 《结构化学》2009,28(3):348-352
A new 1D zigzag chain coordination polymer, { [Mn(bpp)(bac)2]·(CHaCN)}n 1 (bpp = 1,3-bis(4-pyridyl)propane, Hbac = benzoylacetone), has been synthesized and characterized by FT-IR spectroscopy, thermal analysis and X-ray single-crystal diffraction. In the molecular structure, all Mn atoms locate in an octahedral geometry. The guest CH3CN molecules are included in the 1D channels of the 3D packing structure of 1. Crystal data: C35H35MnNaO4, Mr = 616.60, monoclinic, space group P211c, a = 17.691(4), b = 18,955(4), c = 9.712(6) A, β = 93.91(3)°, V = 3249.31(1) A^3, Z = 4, Dc = 1.260 g/cm^3, F(000) = 1292, 20max = 54.9°, μ = 0.447 mm^-1, the final S = 1.020, R = 0.0693 and wR = 0.1497.  相似文献
10.
The vinylidenebis(diphenylphosphine) (vdpp) reacts with CuBr to give a tetranuclear complex, [Cu4(μ3-Br)2(μ2-Br)2(μ2-vdpp)2(CH3CN)2]·(CH3CN)2 1. The title complex has crystallo- graphically imposed centrosymmetry and presents a CuaBr4 core with distorted stair-like structure. All copper(I) atoms in 1 assume distorted tetrahedral coordination geometry. The distance of 2.7745(11) A between the two copper centers indicates the presence of ligand-supported Cu…Cu interactions. Crystal data for 1: C_60H_56Br_4Cu_4N_4P_4, Mr= 1530.77, triclinic, space group P1, a = 11.6593(9), b = 11.7181(9), c = 13.8711(11) А, a = 110.1020(10), β = 102.0050(10), γ = 109.8040(10)°, V = 1557.5(2) А^3, Z = 1, Dc = 1.632 g/cm^3, F(000) = 760, λ= 0.71073А, T = 298(2) K, 2θmax = 50.04°,μ= 4.056 mm^-1, S = 1.181, R = 0.0507 and wR = 0.1025.  相似文献
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