共查询到20条相似文献,搜索用时 11 毫秒
1.
Fa Fu YANG Xia ZHAO Cui Yu HUANG Hong Yu GUO Si Ning ZHENG Qi PENG 《中国化学快报》2006,17(8):1029-1032
Biscalixarenes, as examples of higher order molecular architectures than normal calixarene derivatives, were studied extensively in the recent years due to they possess two calixarene cavities which have the potential for complexing with two guests in two… 相似文献
2.
Tatsuya Oshima Masahiro Goto Shintaro Furusaki 《Journal of inclusion phenomena and macrocyclic chemistry》2002,43(1-2):77-86
A series of calixarene carboxylic acid derivatives were synthesized for the extraction of amino acids. A calix[6]arene carboxylic acid derivative showed the highest extractability to the target tryptophan ester. The main driving forcefor the complexation was the interaction between the ammonium cation of the aminoacid and the oxygen atoms of the host molecule. Stripping of amino acids was alsoaccomplished by contacting the organic solution with a fresh acidic solution. Basedon slope and Job method analyses, it was confirmed that the calix[6]arene formsa 1 : 1 complex with the amino acid ester. The structure of the complex between the calix[6]arene and the amino acid was investigated by 1H-NMR and CD spectra. The calix[6]arene includes a guest molecule in the cavity, and the inclusion induces the asymmetrization of the host molecule. This host compound functions as a novel recognition tool for amino acids. 相似文献
3.
Four p‐tert‐butylcalix[4]arene derivatives with different Schiff base groups at the lower rim were efficiently prepared in three steps. p‐tert‐Butylcalix[4]arene was firstly O‐peralkylated with ω‐haloalkylphthalimide in the system of NaH/DMF to give calixarene tetraalkylphthalimides, which were in turn hydrazinolyzed to give tetraaminoalkylcalixarenes. Then by condensation of the latter with salicylaldehyde and 2‐hydroxy‐1‐naphthaldehyde, a series of calixarene Schiff bases were obtained in satisfying yields. The complexing properties of these Schiff bases for transition metal ions were investigated with UV spectroscopy. 相似文献
4.
Jong Seung Kim Jeong Ah Rim Ok Jae Shon Kwan Ho Noh Eun-Hee Kim Chaejoon Cheong Jacques Vicens 《Journal of inclusion phenomena and macrocyclic chemistry》2002,43(1-2):51-54
A series of N-pivot calix[4]crown-5-azacrown-5 ethers substituted by 2-picolyl, 3-picolyl and benzyl groups respectively were synthesized. The nitrogen atom of the 2-picolyl group is found to participate in the silver ion complexation through three dimensional encapsulation. 相似文献
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6.
硫(硒)杂多杯[4]芳烃合成及其络合性能研究 总被引:2,自引:0,他引:2
合成了下缘硫、硒杂杯[4]芳烃, 然后与杯芳烃片段2,6-二(溴甲基)-4-甲氧基-甲苯在NaH存在条件下缩合得到硫、硒杂多杯[4]芳烃5a和5b. 离子萃取实验表明硫、硒杂多杯[4]芳烃显著增加了对Ag+和Hg2+重金属离子的萃取效果. 相似文献
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H.-J. Buschmann L. Mutihac E. Schollmeyer 《Journal of inclusion phenomena and macrocyclic chemistry》2003,46(3-4):133-137
The stability constants (log K), the reaction enthalpy( H) and entropy ( S) of the complexesformed between some amino acids (glycine, L-alanine,L-valine, L-leucine, L-phenylalanine, L-tryptophan,L-threonine, and L-lysine) and peptides (glycyl-glycine,glycyl-L-alanine, glycyl-L-leucine, glycyl-L-phenylalanine,L-leucyl-glycine, L-leucyl-L-alanine, glycyl-L-valine,L-leucyl-glycyl-glycine, and glycyl-glycyl-glycine) withp-sulfonatocalix[4]arene and hexasodiump-sulfonatocalix[6]arene in aqueous solutions by meansof calorimetric titration have been investigated. The reportedresults demonstrate that the amino acids and peptides under studyform complexes with both p-sulfonatocalix[4]areneand hexasodium p-sulfonatocalix[6]arene. In the case of theamino acids and peptides the complexation with water-solublecalixarenes in aqueous solution is favored by enthalpiccontributions and disfavored by entropic contributions. However,no influence of the ring size of the calixarenes upon thecomplexation is observed. By comparison with the reaction ofthe sodium salt of phenol-4-sulfonic acid with amino acids amacrocyclic effect in case of the calixarenes is possible. 相似文献
9.
Josip Poar Marija Cvetni Andrea Usenik Nikola Cindro Gordan Horvat Katarina Leko Matija Modruan Vladislav Tomii 《Molecules (Basel, Switzerland)》2022,27(2)
The binding of alkali metal cations with two tertiary-amide lower-rim calix[4]arenes was studied in methanol, N,N-dimethylformamide, and acetonitrile in order to explore the role of triazole and glucose functionalities in the coordination reactions. The standard thermodynamic complexation parameters were determined microcalorimetrically and spectrophotometrically. On the basis of receptor dissolution enthalpies and the literature data, the enthalpies for transfer of reactants and products between the solvents were calculated. The solvent inclusion within a calixarene hydrophobic basket was explored by means of 1H NMR spectroscopy. Classical molecular dynamics of the calixarene ligands and their complexes were carried out as well. The affinity of receptors for cations in methanol and N,N-dimethylformamide was quite similar, irrespective of whether they contained glucose subunits or not. This indicated that sugar moieties did not participate or influence the cation binding. All studied reactions were enthalpically controlled. The peak affinity of receptors for sodium cation was noticed in all complexation media. The complex stabilities were the highest in acetonitrile, followed by methanol and N,N-dimethylformamide. The solubilities of receptors were greatly affected by the presence of sugar subunits. The medium effect on the affinities of calixarene derivatives towards cations was thoroughly discussed regarding the structural properties and solvation abilities of the investigated solvents. 相似文献
10.
The syntheses of chirai calix[4]arene derivatives bearing amino acid residue at the lower rim or upper rim by three different methods were reported. 相似文献
11.
以对叔丁基苯酚为起始原料,通过缩合、取代反应合成了25,26,27,28-四对-乙酰胺苯磺酰氧基对叔丁基杯[4]芳烃,其结构经FT—IR,^1H NMR和FAB-MS表征。 相似文献
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A novel calix[4]arene-based fluorescent chemosensor bearing a 2-aminopyridine moiety and a naphthalenic fluorophore was synthesized
The chemical structure of the product was elucidated by FT-IR, MS-FAB, NMR and elemental analyses. Then, the properties and
identification mechanism of the synthesized chemosensor were investigated. The results show that the chemosensor exhibits
selective fluorescent quenching in the presence of aromatic organic acid in acetonitrile solution, and that the binding ability
of the chemosensor with organic acid is in the order of p-cyanic-benzyl acid > p-chloric-benzyl acid > p-methoxyl-benzyl acid > benzyl acid.
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Translated from Journal of South China University of Technology (Natural Science Edition), 2007, 35(4): 20–24 [译自: 华南理工大学学报(自然科学版)] 相似文献
14.
以对叔丁基苯酚为起始原料,把酯基和具有荧光性质的喹啉环引入杯芳烃大环分子中,通过缩合,两步取代反应,获得了具有荧光性质的新型含喹啉环杯[4]芳烃衍生物。其结构经1H NMR,IR,MS和元素分析表征。 相似文献
15.
The new chromophore compounds with NLO properties were prepared by Knoevenagel condensation from forrnyl or diformyl calix[4/arene and isophorone derivatives in the presence of piperidine and acetic acid, respectively. In these chromophore calix[4]arenes, the ring locked trienes were employed as the conjugation bridge and electron acceptor in D-π-A units. The NMR spectra demonstrated that they existed in a cone conformation and consequently non-conjugated D-π-A units could be oriented at nearly the same direction. 相似文献
16.
合成了4个杂金属杯[4]配位聚合物{[Cd(L)(tpa)]·3H2O}n(1),{[Zn2(L)2(tpa)2]·3H2O}n(2),{[Co(L)(oba)]·2DMA·0.5H2O}n(3)和{[Zn(L)(oba)]·DMA}n(4)(L=2-(1H-咪唑基-甲基)-6-(3-(1H-咪唑基-甲基)-5-叔丁基-2-羟基)苄基-4-叔丁基苯酚,H2tpa=对苯二甲酸,H2oba=4,4''-二苯醚二甲酸),并通过元素分析、热重、红外光谱、固态紫外、单晶X射线衍射和粉末X射线衍射对其进行了表征。单晶结构分析表明晶体1是单斜晶系,P21/n空间群,而晶体2,3和4均为三斜晶系,P1空间群。化合物1,2,3和4是由0维[M(N4O2C29H36)](M=Zn,Co,Cd)的杂金属杯[4]与配体对苯二甲酸和4,4''-二苯醚二甲酸形成的一维配位聚合物。 相似文献
17.
合成了4个杂金属杯[4]配位聚合物{[Cd(L)(tpa)]·3H2O}n(1),{[Zn2(L)2(tpa)2]·3H2O}n(2),{[Co(L)(oba)]·2DMA·0.5H2O}n(3)和{[Zn(L)(oba)]·DMA}n(4)(L=2-(1H-咪唑基-甲基)-6-(3-(1H-咪唑基-甲基)-5-叔丁基-2-羟基)苄基-4-叔丁基苯酚,H2tpa=对苯二甲酸,H2oba=4,4''-二苯醚二甲酸),并通过元素分析、热重、红外光谱、固态紫外、单晶X射线衍射和粉末X射线衍射对其进行了表征。单晶结构分析表明晶体1是单斜晶系,P21/n空间群,而晶体2,3和4均为三斜晶系,P1空间群。化合物1,2,3和4是由0维[M(N4O2C29H36)](M=Zn,Co,Cd)的杂金属杯[4]与配体对苯二甲酸和4,4''-二苯醚二甲酸形成的一维配位聚合物。 相似文献
18.
Chiral nitrogen-containing calix[4]arene was easily synthesized by the reaction of 25,27-di(2-bromoethoxy)- 26,28-dihydroxy-5,11,17,23-tetrakis(t-butyl)calix[4]arene with S-(-)-1-phenylethylamine in excellent yield, and showed good ability to recognize the enantiomers of mandelic acid and 2,3-dibenzoyltartaric acid. This finding has potential application to assay and separation of enantiomers of the carboxylic acids. 相似文献
19.
X-ray crystal structures of the inclusion complexes of calix[4]arene monomethoxycarboxylic acid 1 (C30H2606) with acetontrile and acetone are reported. The crystal of C30H26O6·CH3CN is of monoclinic, space group P2 1/c with a = 11.691(5), b = 13.753(5), c = 17.072(7)A, β = 100.104(7)°, C32H29NO6, Mr = 523.56, V = 2702.4(18)A^3, Z = 4, De= 1.287 g/cm^3, μ(MoKα) = 0.089 mm^-1, T = 293(2) K, 5570 independent reflections with 3220 observed ones (1 〉 2σ(I)), R = 0.0521 and wR = 0.1132 with GOF = 1.042 (R = 0.1055 and wR = 0.1350 for all data). The data for C30H26O6·CH3COCH3: monoclinic, space group P2 1/c, α = 12.366(4), b = 12.119(4), c = 18.796(6) A, β = 90.871(6)°, C33H32O7, Mr = 540.59, V = 2816.6(16)A^3, Z = 4, Dc = 1.275 g/cm^3, μ(MoKα) = 0.089 mm^-1, T = 293(2) K, 5783 independent reflections including 2580 observed ones (I 〉 2σ(I)), R = 0.0555 and wR = 0.1424 with GOF= 0.975 (R = 0.1601 and wR = 0.1884 for all data). Their architectures exhibit one-dimensional inclusion polymers which are mediated head-to-tail by the guests. 相似文献
20.
J.K. Cherif M. Mahouachi R. Abidi J. Vicens 《Journal of inclusion phenomena and macrocyclic chemistry》2006,55(1-2):51-57
We describe the synthesis of two functionalised p-tert-butyl calix[4]arenes: tetra(N,N-dimethyl) aminoethylamide derivative 1 and related tetramethylammonium 2. Their complexation properties towards alkali and zinc metal cations are reported along with complexation of perchlorate anion by 2. 相似文献