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Theoretical Study of Hydration Effects on the Selectivity of 18-Crown-6 Between K~+ and Na~+ 被引量:8
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作者 郭晓静 朱育丹 +3 位作者 魏明杰 吴喜明 吕玲红 陆小华 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2011年第2期212-216,共5页
A combination of molecular dynamics (MD) and density functional theory (DFT) calculations were used to study the hydration structures of K+ and Na+ ions under the confinement of 18-crown-6 in order to identify t... A combination of molecular dynamics (MD) and density functional theory (DFT) calculations were used to study the hydration structures of K+ and Na+ ions under the confinement of 18-crown-6 in order to identify the role of water in the selectivity of 18-crown-6 towards K+.The radial distribution functions,coordination num-bers,orientation structures and interaction energies were analyzed to investigate the hydration of K+ and Na+ in 18-crown-6/cation complexes.All calculations of K+ and Na+ in bulk water were also conducted for comparison.The simulation results show that the orientation distributions of the water molecules in the first coordination shell of K+ are more sensitive to the confinement of 18-crown-6 than those of Na+.It is more favorable to confine a K+ in 18-crown-6 than a Na+ in terms of interaction energy.Good agreement is obtained between MD results and DFT results. 展开更多
关键词 18-crown-6 SELECTIVITY molecular dynamics density functional theory
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Lanthanum(Ⅲ) sorption studies on poly[dibenzo-18-crown-6] and its separation from uranium(Ⅵ) and thorium(Ⅳ) in L-valine medium 被引量:2
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作者 S.R.Sabale D.V.Jadhav B.S.Mohite 《Journal of Rare Earths》 SCIE EI CAS CSCD 2009年第5期825-829,共5页
The sorption study of La(Ⅲ) was carried out on poly[dibenzo-18-crown-6] and L-valine medium. The quantitative adsorption of La(Ⅲ) was found at 1×10-2 to 1×10-5 mol/L L-valine. The various eluting agents we... The sorption study of La(Ⅲ) was carried out on poly[dibenzo-18-crown-6] and L-valine medium. The quantitative adsorption of La(Ⅲ) was found at 1×10-2 to 1×10-5 mol/L L-valine. The various eluting agents were found efficient eluents for La(Ⅲ). The capacity of crown polymer for La(Ⅲ) was found to be 0.43 ±0.01 mmol/g. The tolerance limit of various cations and anions for La(Ⅲ) was determined. La(Ⅲ) was quantitatively separated from other metal ions in binary as well as multicomponent mixtures. The study was extended to sequential separation of La(Ⅲ), U(VI) and Th(IV). The good separation yields were obtained and had good reproducibility (±2%). The method incorporated the determination of La(Ⅲ) in real sample. The method was simple, rapid and selective. 展开更多
关键词 La(Ⅲ) L-VALINE poly[dibenzo-18-crown-6] SORPTION SEPARATION rare earths
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Synthesis and Crystal Structure of 3,3'-Dimethyl-dibenzo-18-crown-6 被引量:1
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作者 NIU Mei-Ju DOU Jian-Min WANG Da-Qi LI Da-Cheng 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2006年第6期757-760,共4页
3,3′-Dimethyl-dibenzo-18-crown-6 was synthesized and characterized by elemental analysis, FT-IR, ^1H NMR, UV, MS spectra and X-ray single-crystal diffraction. It belongs to orthorhombic, space group Pna21 with a = 8.... 3,3′-Dimethyl-dibenzo-18-crown-6 was synthesized and characterized by elemental analysis, FT-IR, ^1H NMR, UV, MS spectra and X-ray single-crystal diffraction. It belongs to orthorhombic, space group Pna21 with a = 8.0790(18), b = 16.780(4), c = 15.222(3) .A, Z= 4, V= 2063.6(8) A3 Dc = 1.250 g/cm^3,μ = 0.090 mm^-1, F(000) = 832, R = 0.0474 and wR = 0.1103. According to structural analysis, the title compound possesses a boat-like configuration. 展开更多
关键词 crown ether 3 3'-dimethyl-dibenzo-18-crown-6 SYNTHESIS crystal structure
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Synergistic Effect in Mixed Capillary Gas Chromatographic Stationap Phases Containing Heptakis(2,3,6-tri-o-pentyl)-β-cyclodextrin and Dibenzo-18-crown-6 被引量:1
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作者 Li Ming YUAN Ruo Nong FU +3 位作者 Xue Xian CHEN Shi Hong GUl Rong Ji DAI (Chemistry Department of Yunnan Normal University.Kunming 650092)(Department of Chemical Engineering.Beijing institute of Technology,BEijing 100081)(Solar Energy Research Institute ofyunna 《Chinese Chemical Letters》 SCIE CAS CSCD 1999年第3期223-226,共4页
used-silical capillary columns containing heptakis(2、3、6-tri-o-pentyl)-β-cyclodextrinand dibenzo-18-crown-6 were prepared.By studying the selectivity of mixed stationary phases forsome solute pairs.as well a... used-silical capillary columns containing heptakis(2、3、6-tri-o-pentyl)-β-cyclodextrinand dibenzo-18-crown-6 were prepared.By studying the selectivity of mixed stationary phases forsome solute pairs.as well as comparing with the heptakis(2.3、6-tri-O-pentyl)-β-cyclodextrin and thedibenzo-18-crown-6 used as individual stationary phase、the synergistic effects were observed.These effects were affected by the column temperature.mixed ratio and linear velocity of carrier gas. 展开更多
关键词 Gas chromatography mixed stationary phase synergistic effect heptakis(2.3.6-tri-o-pentyl)-β-cyclodextrin DIBENZO-18-crown-6
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CdI<sub>2</sub>Extraction with 18-Crown-6 Ether into Various Diluents: Classification of Extracted Cd(II) Complex Ions Based on the HSAB Principle
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作者 Yoshihiro Kudo Yamato Ishikawa Hikaru Ichikawa 《American Journal of Analytical Chemistry》 2018年第11期560-579,共20页
CdI2 in water was extracted with 18-crown-6 ether (L) into 10 diluents at 298 K. The following equilibrium constants were determined or evaluated: some extraction constants (Kex/mol-3·dm9 & Kex,ip/mol-2·... CdI2 in water was extracted with 18-crown-6 ether (L) into 10 diluents at 298 K. The following equilibrium constants were determined or evaluated: some extraction constants (Kex/mol-3·dm9 & Kex,ip/mol-2·dm6 for CdLI2, Kex±/mol-2·dm6 for CdLI+ with I-, & Kex2±/mol-1·dm3 for CdL2+ with 2I-), conditional distribution constants (KD,I for I-, KD,CdLI for CdLI+, & KD,CdL for CdL2+) between the two phases, and an ion-pair formation constant (K1,org/mol-1·dm3) for CdLI+ and that (K2,org/mol-1·dm3) for CdLI2 in the organic (org) phases. Using the K1,org and K2,org values, acidities of the complex ions, CdL2+ and CdLA+ (A- = I-, Br-, & Cl-), in the 11 diluents were classified by applying the HSAB rule. Especially, the CdLA+ ions were classified as the soft acids in 9 diluents. Also, molar volumes (Vj/cm3·mol-1) of j = CdLI2 and CdL2+ were determined with the regular-solution-theory plot of logKex,ip vs. logKD,L and its pseudo-plot of logKD,CdL, respectively. Here, KD,L denotes the distribution constant of L between the two phases. So, sizes among CdLA2 and CdL2+ were compared by using the Vj values. Additionally, some distribution equilibrium potentials (dep/V) between the water and org bulk phases were topically calculated from an equation of KD,I with KSD,I, where the symbol KSD,I shows a standard distribution constant of I- at dep = 0 V for a given diluent. 展开更多
关键词 ION-PAIR Formation CONSTANTS HSAB Acidity Molar Volume Conditional DISTRIBUTION CONSTANTS DISTRIBUTION Equilibrium Potentials Cadmium Iodide 18-crown-6 ETHER
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Bibracchial Lariat Ethers(Ⅰ)——The Synthesis and Crystal Structure of the N,N'-bis(2-Methoxy-1-Naphthylmethyl)-4,13-Diaza-18-Crown-6 Sodium Iodide Complex
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作者 Ge Yuhua, Wang Defen and Hu Hongweng (Department of Chemistry, Nanjing University, Nanjing)Zhou Zhongyuan and Yu Kaibei (Chengdu Center of Analysis and Determination, Academic Sinica, Chengdu) 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 1992年第1期48-52,共5页
Diaza Crown ethers are versatile complexing reagents, their complexing abilities are dramatically modified by the electron donating atoms on substituents attached to the nitrogen if they can give a three-dimensional c... Diaza Crown ethers are versatile complexing reagents, their complexing abilities are dramatically modified by the electron donating atoms on substituents attached to the nitrogen if they can give a three-dimensional cavity as in cryptates. Hence the synthesis and characterization of bibracchial lariat ethers (BIBLES) have received much attention. In the preparation of new BIBLES, a complex Ⅱ was unexpectedly obtained. 展开更多
关键词 Bibracchial lariat ether Diaza-18-crown-6 derivative Crystal structure Sodium iodide complex
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Fluorescence-quenching of Tryptophan Ion-18-crown-6 Complex——A Different Observation from Its Neutral Counterpart
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作者 YU Qing CAO Jie +1 位作者 LIU Tao WANG Zhi-xiang 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2009年第3期362-367,共6页
It is well-known that primary amines form inclusive complexes with crown ethers. This kind of noncovalently inclusive complexes, exemplified tryptophan complex with 18-crown-6, was studied by combination of two experi... It is well-known that primary amines form inclusive complexes with crown ethers. This kind of noncovalently inclusive complexes, exemplified tryptophan complex with 18-crown-6, was studied by combination of two experimental methods, fluorimetry and mass spectrometry, with theoretical calculation. Fluorescence intensity of tryptophan in the absence and the presence of 18-crown-6 in aqueous HAc-NaAc buffer solution at pH=3.73 has been studied by fluorometry. The fuorescence intensity decreases significantly with increasing the concentration of 18-crown-6. The association constant K for the 1:1 complex of tryptophan ion-18-crown-6 was determined by means of fuorimetry. Mass spectrometric study of the complex gives direct evidence of the complex in the gas phase whose structure and binding energy are properly predicted by ab initio calculation. 展开更多
关键词 TRYPTOPHAN 18-crown-6 complex FLUORESCENCE Mass spectrometry Ab initio calculation
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Synthesis and Crystal Structure of a Sandwiched Trinuclear Complex [Tl_2(18-Crown-6)_2Pt(CN)_4]·2H_2O
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作者 LIU Feng-Hui CHEN Wan-Zhi WANG Da-Qi 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2006年第6期677-680,共4页
The trinuclear complex bis(18-crown-6)thallium tetracyanoplatinate [Tl2(1 8-crown- 6)2Pt(CN)4]·2H2O was prepared and its structure was determined by X-ray diffraction analysis. The compound (C28H52N4O14PtT... The trinuclear complex bis(18-crown-6)thallium tetracyanoplatinate [Tl2(1 8-crown- 6)2Pt(CN)4]·2H2O was prepared and its structure was determined by X-ray diffraction analysis. The compound (C28H52N4O14PtTl2, Mr = 1272.57) crystallizes in monoclinic, space group P21/n with a = 10.5180(10), b = 8.6162(8), c = 21.118(2) A, β= 92.577(2)°, V= 1911.9(3) A^3, Z = 2, Dc = 2.211 g/cm^3, F(000) = 1200,μ= 12.123 mm^-1, R = 0.0181 and wR = 0.0427. The linearly arranged three metals are sandwiched by two 18-crown-6 molecules. 展开更多
关键词 PLATINUM THALLIUM CYANIDE 18-crown-6 crystal structure
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{[K.18-Crown-6]Br_3}_n:A tribromide catalyst for the catalytic protection of amines and alcohols
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作者 Gholamabbas Chehardoli Mohammad Ali Zolfigol Fateme Derakhshanpanah 《催化学报》 SCIE EI CAS CSCD 北大核心 2013年第9期1730-1733,共4页
{[K.18-Crown-6]Br3}n,a unique tribromide-type catalyst,was utilized for the N-boc protection of amines and trimethylsilylation(TMS)and tetrahydropyranylation(THP)of alcohols.The method is general for the preparation o... {[K.18-Crown-6]Br3}n,a unique tribromide-type catalyst,was utilized for the N-boc protection of amines and trimethylsilylation(TMS)and tetrahydropyranylation(THP)of alcohols.The method is general for the preparation of N-boc derivatives of aliphatic(acyclic and cyclic)and aromatic,and primary and secondary amines and also various TMS-ethers and THP-ethers.The simple separation of the catalyst from the product is one of the many advantages of this method. 展开更多
关键词 {[K.18-crown-6]Br3}n TRIMETHYLSILYLATION TETRAHYDROPYRANYLATION Alcohol Organic TRIBROMIDE N-boc PROTECTION of amine
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REGIOSELECTIVE OXIDATION OF KETONE BY AN OXIDATIVE REAGENT SYSTEM KH/O_2/18-CROWN-6/THF:APPLICATION TO SYNTHESIS OF VARIOUS LACTONES
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作者 Wei Shan ZHOU Biao JIANG Shanghai Institute of Organic Chemistry,Chinese Academy of Sciences,345 Lingling Lu,Shanghai 200032.Xin Fu PAN Department of Chemistry,Lanzhou University,Lanzhou 730000. 《Chinese Chemical Letters》 SCIE CAS CSCD 1991年第7期505-508,共4页
the regioselectivity in the oxidation of different types of ketone compounds 1--6 with an oxidative reagent system,KH/O_2/18- Crown-6/THF is described.From these oxidative products,the various lactones have been prepa... the regioselectivity in the oxidation of different types of ketone compounds 1--6 with an oxidative reagent system,KH/O_2/18- Crown-6/THF is described.From these oxidative products,the various lactones have been prepared. 展开更多
关键词 THF REGIOSELECTIVE OXIDATION OF KETONE BY AN OXIDATIVE REAGENT SYSTEM KH/O2/18-crown-6/THF KH
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Chromatographic separation of Be(Ⅱ) from Mg(Ⅱ), Ca(Ⅱ), Sr(Ⅱ) and Ba(Ⅱ) using poly[dibenzo-18-crown-6] and L-arginine
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作者 Sandip R. Sabale Baburao S. Mohite 《Journal of Chemistry and Chemical Engineering》 2009年第6期37-43,共7页
A simple and selective method for the separation of Be(Ⅱ) was developed using poly[dibenzo-18-crown-6] as a stationary phase in column chromatography. The study was carried out in L-arginine medium. 1.0-8.0 M HCl a... A simple and selective method for the separation of Be(Ⅱ) was developed using poly[dibenzo-18-crown-6] as a stationary phase in column chromatography. The study was carried out in L-arginine medium. 1.0-8.0 M HCl and CH3COOH, 0.5-8.0 M HBr, HClO4 and H2SO4, 0.2-1.0 M EDTA and 0.02-0.12 M ammonium oxalate were found to be an efficient eluents for Be(Ⅱ). The capacity of polymer was 0.554-0.01 mmol/g of crown polymer. The tolerance limit of various cations and anions were reported. Be(Ⅱ) was quantitatively separated from Mg(Ⅱ), Ca(Ⅱ), Sr(Ⅱ) and Ba(Ⅱ). The selective separation of Be(Ⅱ) was possible from multicomponent mixtures. The method was extended to determine Be(Ⅱ) from geological samples. Method was simple, rapid and selective having good reproducibility (approximately4-2%). 展开更多
关键词 Be(Ⅱ) poly[dibenzo-18-crown-6] L-ARGININE SEPARATION column chromatography
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One-dimensional Chain Crown Ether Complexes Synthesis and Crystal Structure of ([K(DB18-crown-6)]_(2)(CH_(3)CN))[Pt(SCN)_(4)]
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作者 LI Da-cheng LIU Ying DOU Jian-rain 《聊城大学学报(自然科学版)》 2003年第2期7-8,71,共3页
The complexe{[K(DB18-crown-6)]_(2)(CH_(3)CN)}[Pt(SCN)_(4)]was synthesized and characterized by elemental analysis,IR spectrum and X-ray diffraction analysis.The complexe belongs to monoclinic,space group c2/c with cel... The complexe{[K(DB18-crown-6)]_(2)(CH_(3)CN)}[Pt(SCN)_(4)]was synthesized and characterized by elemental analysis,IR spectrum and X-ray diffraction analysis.The complexe belongs to monoclinic,space group c2/c with cell dimensions,a=2.5904(8),6=1.3653(4),c-1.84706(6)nm,β=123.811(4)°,V=5-339(3)nm^(3),Z=4,.Dcalcd=l.577 g/cm^(3),F(000)=2552,R_(1)=0.051 l,wR_(2)=0.1411.The complexe shows one-dimensional chain of{[K(DB18-crown-6)]+complex cation and[Pt(SCN),i]2-complex anion bridged by N atom of CHaCN moleculer between two[K(DB18-crown-6)]_(2)[Pt(SCN)_(4)]groups respectively. 展开更多
关键词 one-dimensional chain Pt complex DB18-crown-6 crystal structure
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弱相互作用构筑的二维、三维冠醚配合物{[K(18-C-6)]_(2)(C_(2)H_(4)Cl_(2))}[Ni(dmit)_(2)]_(2)和[K(18-C-6)][Ni(dmit)_(2)]的合成与结构 被引量:7
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作者 王大奇 窦建民 +2 位作者 牛梅菊 李大成 刘颖 《化学学报》 SCIE CAS CSCD 北大核心 2002年第12期2145-2152,共8页
研究了18冠6与NiCl_(2)·6H_(2)O,K_(2)dmit(dmit=4,5 dimercapto 1,3 dithiole 2 thione,C_(3)S^(2-)_(5))在不同溶剂中反应生成的两个标题配合物{[K(18 C 6)]_(2)(C_(2) H_(4) C_(l2))}[Ni(dmit)_(2)]_(2)(1)和[K(18 C 6)][Ni(dmi... 研究了18冠6与NiCl_(2)·6H_(2)O,K_(2)dmit(dmit=4,5 dimercapto 1,3 dithiole 2 thione,C_(3)S^(2-)_(5))在不同溶剂中反应生成的两个标题配合物{[K(18 C 6)]_(2)(C_(2) H_(4) C_(l2))}[Ni(dmit)_(2)]_(2)(1)和[K(18 C 6)][Ni(dmit)_(2)](2).通过元素分析、红外光谱、单晶X射线衍射进行了表征.1和2均属三斜晶系,空间群P 1.1的晶体学数据:a=10272(2)nm,b=12282(3)nm,c=14205(3)nm,α=113473(3)°,β=90609(3)°,γ=91439(3)°,V=16430(6)nm^(3),Z=2,F(000)=876,R_(1)=005032的晶体学数据:a=08502(2)nm,b=12178(4)nm,c=15118(4)nm,α=86454(5)°,β=77734(5)°,γ=85364(5)°,V=15228(8)nm3,Z=2,F(000)=774,R_(1)=00565.配合物1,2分别通过K S,K Cl,S S和K S,S S弱相互作用形成二维。 展开更多
关键词 二维、三维冠醚配合物 冠醚 18一冠一6 DMIT 合成与结构
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一维链状冠醚配合物[K(18—C—6)]2[M(NO2)4](H2O)(M=Pd,Pt)的合成与结构 被引量:5
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作者 窦建民 宋兴民 +4 位作者 刘颖 李雪 郑培菊 杜晨霞 朱玉 《化学学报》 SCIE CAS CSCD 北大核心 2001年第5期729-735,共7页
研究了18-C-6分别与K2[Pd(NO2)4],K2[Pt(NO2)4]的反应,并通过元素分析、红外光谱、单晶X射线衍射对生成的配合物[K(18-C-6)]2[Pd(NO2)4](H2O)0.5(1)和[K(18-C-6)]2[Pt(NO2)4](H2O)(2)进行了表征.两个配合物均为单斜晶系,空间群P21/c.1... 研究了18-C-6分别与K2[Pd(NO2)4],K2[Pt(NO2)4]的反应,并通过元素分析、红外光谱、单晶X射线衍射对生成的配合物[K(18-C-6)]2[Pd(NO2)4](H2O)0.5(1)和[K(18-C-6)]2[Pt(NO2)4](H2O)(2)进行了表征.两个配合物均为单斜晶系,空间群P21/c.1的晶体学数据:a=1.7104(3),b=1.4859(3),c=1.5763(3)nm,β=93.49(3)°,V=3.9987(14)nm3,Z=4,Dc=1.507g/cm3,F(000)=1880,R1=0.0681,wR2=0.1004.2的晶体学数据:a=1.1312(3)nm,b=1.4227(2)nm,c=1.2266(3)nm,β=93.141(10)°,V=1.9711(8)nm3,Z=4,Dc=1.614g/cm3,F(000)=936,R1=0.0265,wR2=0.0721.在固态,配合物1具有[K(18-C-6)]2[Pd(NO2)4](H2O)(1a)和[K(18-C-6)]2[Pds@(NO2)4](1b)两个分子,两者比例为1:1.前者相邻的两个分子通过水分子中的氧原子相连接形成一维链状结构,后者形成假一维链状结构.在配合物2中相邻的两个分子通过水分子中的氧原子相连接形成一维链状结构. 展开更多
关键词 一维链状冠醚 配合物 合成 晶体结构 元素分析 红外光谱 X射衍射
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18-冠-6/ADN含能共晶氧化剂对BAMO-THF推进剂能量特性的影响 被引量:3
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作者 姚二岗 仪建华 +5 位作者 董平 赵凤起 谢五喜 杨宗伟 徐司雨 孙志华 《火炸药学报》 EI CAS CSCD 北大核心 2018年第3期267-272,共6页
采用X射线单晶衍射表征了新型18-冠-6/二硝酰胺铵含能共晶(18-Crown-6/ADN)氧化剂晶体的结构;采用氧弹式量热计测定了其燃烧热并获得其标准摩尔生成焓(Δ_fH_m~θ);采用最小自由能法计算了18-Crown-6/ADN对3,3-二叠氮甲基氧丁环与四氢... 采用X射线单晶衍射表征了新型18-冠-6/二硝酰胺铵含能共晶(18-Crown-6/ADN)氧化剂晶体的结构;采用氧弹式量热计测定了其燃烧热并获得其标准摩尔生成焓(Δ_fH_m~θ);采用最小自由能法计算了18-Crown-6/ADN对3,3-二叠氮甲基氧丁环与四氢呋喃共聚醚(BAMO-THF)推进剂能量性能的影响。结果表明,18-Crown-6/ADN晶体属于单斜晶系,C2/c空间群,晶胞参数:a=2.393 5nm、b=0.863 27nm、c=2.032 4nm;α=90°、β=112.874°、γ=90°;18-Crown-6/AND的Δ_fH_m~θ为-(833.57±4.89)kJ/mol,其取代配方中的AP、HMX、ADN或CL-20后推进剂的理论比冲(I_(sp))最低;含18-Crown-6/ADN的BAMO-THF推进剂中加入部分高能组分(如CL-20、HMX)可提高其能量性能;能量计算表明,BAMO-THF/A3、Al、AP、(18-Crown-6/ADN)/CL-20/HMX的质量分数分别为25%、18%、15%、42%,18-Crown-6/ADN、CL-20和HMX的质量比约3∶4∶3时,配方的I_(sp)约2 550N·s/kg,燃烧室温度约2 900K,燃气平均相对分子质量约24.50,特征速度约1 540m/s。 展开更多
关键词 含能共晶氧化剂 18-crown-6/ADN 燃烧热 BAMO-THF推进剂 能量特性
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三维网状冠醚配合物(Bu_4N){[K(18-C-6)][Cd_4(dmit)_2(dmt)_3]}的合成与结构 被引量:6
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作者 王大奇 窦建民 +2 位作者 牛梅菊 李大成 刘颖 《化学学报》 SCIE CAS CSCD 北大核心 2003年第4期551-555,共5页
研究了 18 冠 6( 18 C 6)与KSCN ,CdCl2 ·2 5H2 O ,(Bu4N) 2 [Zn(dmit) 2 ] (dmit =4,5 dimercapto 1,3 dithiole 2 thione ,C3 S52 -)的反应 ,生成的标题配合物 ( 1)通过元素分析、红外光谱、单晶X射线衍射进行了表征 .配合... 研究了 18 冠 6( 18 C 6)与KSCN ,CdCl2 ·2 5H2 O ,(Bu4N) 2 [Zn(dmit) 2 ] (dmit =4,5 dimercapto 1,3 dithiole 2 thione ,C3 S52 -)的反应 ,生成的标题配合物 ( 1)通过元素分析、红外光谱、单晶X射线衍射进行了表征 .配合物属单斜晶系 ,空间群C2 /c.晶体学数据 :a =3 4780 ( 7)nm ,b =1 5 170 ( 3 )nm ,c =2 844 0 ( 6)nm ,β =10 5 93 ( 3 )° ,V =14 42 7( 3 )nm3 ,Z =8,F( 0 0 0 ) =7872 ,R1=0 0 42 5 ,wR2 =0 0 73 9.配合物由一个Bu4N+ 阳离子和一个 {[K( 18 C 6) ] [Cd4(dmit) 2 (dmt) 3 ] }-(dmt =4,5 dimercapto 1,2 dithiole 3 thione ,C3 S52 -)配阴离子组成 .{[K( 18 C 6) ] [Cd4(dmit) 2 (dmt) 3 ] }-通过K…S ,S… 展开更多
关键词 三维网状冠醚配合物 合成 弱相互作用 18-冠-6 镉配合物 结构
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癸二酸-二苯并-18-冠-6共聚物的合成 被引量:2
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作者 周庆业 鹿秀山 +4 位作者 宋谋道 张邦华 郝广杰 张莹 何炳林 《高分子学报》 SCIE CAS CSCD 北大核心 1998年第5期549-555,共7页
脂肪族二元羧酸与二苯并18冠6在多聚磷酸中进行酰基化反应,可以制得酮型冠醚聚合物,二元酸的分子链长度会影响聚合反应的难易程度.对聚合反应条件进行优化控制,可以制得分子量高、成膜性能良好的癸二酸二苯并18冠... 脂肪族二元羧酸与二苯并18冠6在多聚磷酸中进行酰基化反应,可以制得酮型冠醚聚合物,二元酸的分子链长度会影响聚合反应的难易程度.对聚合反应条件进行优化控制,可以制得分子量高、成膜性能良好的癸二酸二苯并18冠6共聚物. 展开更多
关键词 PPA 酮型 冠醚聚合物 聚冠醚 共聚物
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含二苯并-18-冠-6单元的酰胺型双臂冠醚化合物的合成 被引量:1
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作者 彭明生 谢明贵 蒋青 《化学试剂》 CAS CSCD 2000年第1期39-41,共3页
合成了 2个含二苯并 -1 8-冠 -6单元的酰胺型双臂冠醚化合物 ,其结构经 IR、1 HNMR、MS和元素分析确证 ,该 2个化合物都不具有液晶性。
关键词 酰胺 双臂冠醚 液晶 合成 结构
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18—冠—6与Na2[M(mnt)2](M=Cu,Ni)配合物的合成与结构 被引量:3
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作者 窦建民 李大成 +5 位作者 于清江 刘颖 徐立强 毕文华 雍伟 郑培菊 《化学学报》 SCIE CAS CSCD 北大核心 2001年第12期2162-2169,共8页
研究了18-冠-6分别与Na2[M(mnt)2][M=Cu,Ni;mnt=丁二腈烯二硫醇阴离子,C2S2(CN)22-]的反应,得到的配合物{[Na(18-C-6)][Na(18-C-6)(H2O)]}[Cu(mnt)2](1),[Na(18-C-6)(H2O)]2[Ni(mnt)2]@(18-C-6)(2)通过元素分析、红外光谱、X射线单晶衍... 研究了18-冠-6分别与Na2[M(mnt)2][M=Cu,Ni;mnt=丁二腈烯二硫醇阴离子,C2S2(CN)22-]的反应,得到的配合物{[Na(18-C-6)][Na(18-C-6)(H2O)]}[Cu(mnt)2](1),[Na(18-C-6)(H2O)]2[Ni(mnt)2]@(18-C-6)(2)通过元素分析、红外光谱、X射线单晶衍射进行了表征.两个配合物均为三斜晶系,空间群P1.1的晶体学结构数据:a=1.22697(19)nm,b=1.22780(19)nm,c=1.5665(3)nm,α=95.083(3)°,β=101.534(3)°,y=91.007(3)°,V=2.3016(6)nm3,Z=2,Dcalcd=1.350g/cm3,F(000)=976,R1=0.0726,wR2=0.1843.2的晶体学结构数据:a=1.11620(17)nm,b=1.22054(18)nm,c=1.27939(18)nm,α=111.647(2)°,β=92.792(3)°,y=103.201(2)°,V=2.5461(4)nm3,Z=1,Dcalcd=1.304g/~cm3,F(000)=642,R1=0.0459,wR2=0.1003.1中的[Cu(mnt)2]2-通过mnt的氮原子与[Na(18-C-6)]+中的钠原子成键,形成了一维链状结构;[Na(18-C-6)(H2O)]+只起平衡电荷的作用.2中的[Ni(mnt)2]2-也通过配体的mnt氮原子与两个[Na(18-C-6)(H2O)]+中的钠原子成键,形成稳定的中性配合物. 展开更多
关键词 18-冠-6 丁二腈烯二硫醇阴离子 冠醚 配合物 晶体结构 合成
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双冠醚的研究(Ⅶ)——Schiff碱型和仲胺型双(苯并-18-冠-6)的合成 被引量:1
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作者 王德枌 王登进 胡宏纹 《高等学校化学学报》 SCIE EI CAS CSCD 北大核心 1990年第3期266-270,共5页
4′-氨基苯并-18-冠-6分别与间-硝基苯甲醛、对-硝基苯甲醛、间-苯二甲醛及其取代物和对-苯二甲醛缩合制得6种新的Schiff碱型单冠醚和双冠醚。4′-甲酰基苯并-18-冠-6分别与4′-氨基苯并-15-冠-5、4′-氨基苯并-18-冠-6作用制得2个醚环... 4′-氨基苯并-18-冠-6分别与间-硝基苯甲醛、对-硝基苯甲醛、间-苯二甲醛及其取代物和对-苯二甲醛缩合制得6种新的Schiff碱型单冠醚和双冠醚。4′-甲酰基苯并-18-冠-6分别与4′-氨基苯并-15-冠-5、4′-氨基苯并-18-冠-6作用制得2个醚环大小相同和不同的Schiff碱型双(苯并冠醚)。这些双冠醚经硼氢化钠还原得到相应的6种新的仲按型双冠醚。 展开更多
关键词 双冠醚 SCHIFF碱 仲胺 合成
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