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1.
The third-order nonlinear optical properties of the ruthenium (II) complex with tetra-15-crown-5-phthalocyanine and axially coordinated triethylenediamine molecules (R 4Pc)Ru(TED) 2 were analyzed by means of the z-scanning technique. A solution of (R 4Pc)Ru(TED) 2 in tetrachloroethane was exposed to nanosecond laser pulses at a wavelength of 1064 nm. It was found that the third-order molecular polarizability of the Ru(II) complex is 4.5 × 10 ?32 cm 4/C (esu). The polarizability per molecule increases by a factor of 3.6 when the single molecule occurs in a supramolecular assembly of (R 4Pc)Ru(TED) 2 complexes. The photoelectric and photorefractive properties at 1064 nm of polymer composites, determined by the supramolecular assemblies that exhibits optical absorption and photoelectric sensitivity in the near IR region, are reported. 相似文献
2.
本文用斜率法、饱和法以及通过与萃取合物相对应的冠醚配合物晶体的制备及其性质研究, 探讨了In^3^+的萃取机理, 测定并计算了表观萃取平衡常数, 将此萃取体系应用于铟和某些体系应用于铟和某些金属离子的萃取分离, 亦获得较好的结果. 相似文献
3.
Praseodymium(III) complexes with tetra-15-crown-5-phthalocyanine—the neutral radical [(R 4Pc ?·)Pr 3+(R 4Pc 2?)] 0 and one-electron reduced [(R 4Pc 2?)Pr 3+(R 4Pc 2?)] ? forms of the sandwich double-decker complex and the triple-decker complex Pr 2(R 4Pc) 3 (R 4Pc 2? is [4,5,4′,5′,4″,5t",4″′,5″′-tetrakis(1,4,7,10,13-pentaoxatridecamethylene)phthalocyaninate ion])—have been synthesized and spectrally characterized. These compounds have been obtained by direct interaction of tetra-15-crown-5-phthalocyanine with praseodymium(III) acetate or acetylacetonate. The salt anion has an effect on the yield and structure of the reaction products. The complexes have been obtained in high yields, isolated, and characterized by different physicochemical methods: UV and visible electronic absorption spectroscopy, 1H NMR, and MALDI-TOF mass spectrometry. The double-decker complex is stable in the solid state and in solutions. The triple-decker complex is stable only in the solid state. In a chloroform-methanol (10 vol %) solution, it slowly decomposes. 相似文献
4.
We proposed a new approach to the synthesis of heteroleptic crown-substituted terbium(III) bisphthalocyaninate, [(15C5)4Pc]Tb(Pc) (1) based on the reaction of unsubstituted lanthanum bisphthalocyaninate (La(Pc)2) with tetra-15-crown-5-phthalocyanine (H2[(15C5)4Pc]) and terbium(III) acetate in a mixture of octanol and chloronaphthalene in the presence of 1,8-diazabicyclo[ 5.4.0]undec-7-ene as an organic base. For the first time, we carried out a comparative spectrophotometric titration of compound 1 with MBPh4 solutions (M = K, Rb, Cs) and demonstrated the formation of isostructural cofacial supramolecular dimers. Spectral-structural correlations were developed for evaluation of the distances between phthalocyanine ligands in new supramolecular assemblies, which can be used for the development of polynuclear suprasingle-molecule magnetic materials. 相似文献
5.
The photoelectric and photorefractive characteristics of composites based on poly(vinylcarbazole) containing crown-substituted ruthenium phthalocyanine with axially coordinated pyrazine molecules, (R 4Pc)Ru(pyz) 2 (where R 4Pc ?2 is [4,5,4′,5′,4″,5″,4″′,5″′-tetrakis-(1,4,7,10,13-pentaoxatridecamethylene)phthalocyanine ion], pyz is pyrazine), have been studied. Supramolecular ensembles of these complexes are responsible for optical absorption and photoelectric and photorefractive sensitivity in the near IR region. It has been found that under the action of a 1064-nm laser, the quantum efficiency of formation of mobile charge carriers, estimated from the photocurrent, corresponds to the Onsager equation when the quantum yield of formation of thermalized electron-hole pairs φ 0 = 0.35 and the separation distance is 9.8 Å, irrespective of the (R 4Pc)Ru(pyz) 2 content. The kinetic curves of amplification of the information laser beam are bellshaped. This suggests that the photorefractive characteristics are underestimated owing to lowering to zero of the field E 0 inside the layer as a result of buildup of space charge in the near-electrode space upon passing the dark current. The two-beam gain coefficient at an (R 4Pc)Ru(pyz) 2 content of 7 wt % is Γ = 62 cm ?1 as estimated from the maximum of the bell-shaped curve. 相似文献
6.
X-ray diffraction analysis was used to establish the structure of aluminum( iii) alkoxide tetra-15-crown-5-phthalocyaninate complex. 相似文献
7.
The images of ensembles of ruthenium(II) complexes with tetra-15-crown-5-phthalocyanine and axially coordinated triethylenediamine
molecules, (R 4Pc)Ru(TED) 2, obtained on an atomic force microscope were analyzed. A comparison with the X-ray structure analysis data was performed
to estimate the number and mutual arrangement (architecture) of molecules in supramolecular aggregates depending on the nature
of the solvent and the temperature of solutions before casting. Storage at room temperature or heating of a solution of the
complex in tetrachloroethane caused the formation of stable supramolecular “wires” 600 nm or more long. The z-scanning method was used to study the third-order nonlinear optical characteristics of solutions of the (R 4Pc)Ru(TED) 2 complex in tetrachloroethane. 相似文献
8.
The ruthenium complexes with tetra-15-crown-5-phthalocyanine and various axial ligands were synthesized and characterized by spectroscopy. A method for the synthesis of bisaxially coordinated ruthenium(ii) tetra-15-crown-5-phthalocyaninates with the N-donor ligands (R 4Pc)Ru(L 2) (R 4Pc 2– = [4,5,4",5",4,5,4,5-tetrakis(1,4,7,10,13-pentaoxotridecamethylene)phthalocyaninate-ion], L is trimethylamine (Me 3N), pyridine (py), isoquinoline (iqnl), triethylamine (Et 3N), pyrazine (pyz)) was developed. The preparation technique involves selective decarbonylation of (R 4Pc)Ru(CO)(MeOH) on treatment with Me 3NO in excess N-donor solvent. 相似文献
9.
Several monomethinecyanine, merocyanine and styryl dyes were synthesized using a 5,6-(1,4,7,10,13-pentaoxacyclotridecane)-benzothiazole derivative as the starging reageni. A study was made of their spectral characteristics and the effect which complexing with alkaline and alkaline-earth metal salts had on their chromaticity.Organic Chemistry Institute, National Academy of Sciences of Ukraine, Kiev. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 7, pp. 992–996. Original article submitted March 12, 1996. 相似文献
11.
苯并-15-冠-5-四溴合铟(III)酸钾,KInBr~4(C~14H~20O~5)~2,晶体属单斜晶系,空间群为C~2h^5-P2~1/n,晶胞参数a=14.402(3),b=15.082(3),c=17.262(5)A,β=93.42(2),Z=4.非氢原子的位置由Patterson函数及Fourier合成法找出,经全矩阵最小二乘法修正R=0.057.结构分析表明K^+和两个苯并-15-冠-5(B-15-C-5)分子直接配位,对阴离子为InBr~4^-,具有四面体构型.InBr~4^-与配阳离子K(B-15-C-5)~2^+依靠静电引力结合为离子对.由此说明,In(III)在过量KBr存在下可以被B-15-C-5定量地萃取至有机相中. 相似文献
12.
The photoelectric sensitivity and photorefractive properties at 1064 nm of composites consisting of poly(vinyl carbazole) (PVC), complexes of ruthenium(II) with tetra-15-crown-5-phthalocyanine and axially coordinated CO and CH 3OH molecules (R 4Pc)Ru(CO)(CH 3OH), R 4Pc 2? is tetrakis-(1,4,7,10,13-pentaoxatridecamethylene)phthalocyaninate ion in the presence and absence of ferrocene were studied. The nature of the optical absorption within the near IR region in composites prepared from PVC and (R 4Pc)Ru(TED) 2 (TED is triethylenediamine) and (R 4Pc)Ru(CO)(CH 3OH) is discussed. It was established that the photoelectric, non-linear optical, and photorefractive properties of the polymer composite are determined by supramolecular ensemble composed of Ru(II) crown-phthalocyanines. 相似文献
13.
Russian Chemical Bulletin - A series of sorbents based on benzo-15-crown-5, various supports (styrene-divinylbenzene LPS-500, hydrophobized silica gel), and diluents (octan-1-ol, nitrobenzene,... 相似文献
14.
Erbium mono-, bis-, and tris(phthalocyaninates) with tetra-15-crown-5-phthalocyanine (H 2R 4Pc) were synthesized and studied by spectroscopic methods. The complexes were obtained by reacting H 2R 4Pc with erbium salts in high-boiling solvents. To compare the efficiency of two approaches to the synthesis of double-decker
lanthanide phthalocyaninates, bis(phthalocyaninate) [Er(R 4Pc) 2] was also obtained by a template procedure from dicyanobenzo-15-crown-5. A combination of physicochemical methods (UV and
IR spectroscopy, MALDI-TOF mass spectrometry, 1H NMR) was used for identifying the compounds and proving their individuality and structure. The photoluminescence method
demonstrated that solutions of erbium bis- and tris(phthalocyaninates) in CHCl 3 are nonfluorescent in the visible range of light whereas solutions of mono(phthalocyaninate) in CHCl 3 and DMSO exhibit fluorescence with maxima at 707 and 695 nm, respectively. The oxidation of erbium mono(phthalocyaninate)
leads to fluorescence quenching. 相似文献
15.
A number of new stable azomethine crown ether derivatives have been synthesized by condensation of 4-aminobenzo-15-crown-5 with aromatic aldehydes. Complexation of the products with transition metal cations (Cu 2+, Zn 2+, Fe 3+, Co 3+, Ni 3+) has been studied by spectrophotometry. 相似文献
16.
1. |
An x-ray structure analysis has revealed substantial diferrences in the conformational states of 2,3-(4-benzoyl)benzo-15-crown-5 and benzo-15-crown-5 in the crystal phase, differences related to realization of a trans-gauche-gauche' conformation in one COCCOC fragment in the 2,3-(4-benzoyl)benzo-15-crown-5.
| 2. |
In nonpolar solvents, an equilibrium of several structures is realized in both compounds, an equilibrium with the participations of trans-gauche-trans, trans-gauche-gauche and trans-gauche-gauche' conformations. In a polar medium, there are no indications of the trans-gauch-gauche' conformation.
| 3. |
Upon complexation of the ligands with calcium thiocyanate in acetonitrile, there are spectral indications of complexes with differing stoichiometry, with a large contribution of the structure from trans-gauche-trans conformations.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 4, pp. 833–838, April, 1989. 相似文献
18.
It is established that supramolecular ensembles on the basis of the complex of ruthenium(II) with tetra-15-crown-5-phthalocyanine and axially coordinated triethylenediamine molecules (R 4Pc)Ru(TED) 2, where R 4Pc 2? and TED denote 4,5,4′,5′,4″,5″4?,5?-tetraksis-(1,4,7,10,13-pentaoxatridecamethylene)phthalocyaninate ion and triethylenediamine molecule, respectively) make an aromatic polyamide layer photoelectrically sensitive to 1064-nm Nd:YAG laser radiation, exhibit third-order susceptibility, and, consequently, impart photorefractive properties to the polymer layer at this wavelength. 相似文献
19.
Thermal dissociation reactions of lanthanide(III) nitrates and thiocyanates solid complexes of the cyclic polyether benzo-15-crown-5 were studied in dynamic atmosphere of dry nitrogen and under reduced pressure (5·10 ?2 mm Hg). The complexes of lanthanide nitrates undergo dissociation with ligand decomposition while from those of lanthanide thiocyanates the ligand is released undecomposed. Values of enthalpy change and “activation energy” for the dissociation reactions of the complexes with lanthanide thiocyanate were obtained and briefly discussed. 相似文献
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