P 80 Polyesterification in a presence of metal oxides [Text] : доклад, тезисы доклада / A. I. Tarasov, L. Ch. Nafadzokova, V. A. Vasnev, I. N. Asurkova, A. K. Mikitaev, O. L. Lependina // International symposium "New Approaches on Polymer Synthesis and Macromolecular Formations", SPb, June 16-20, 1997 : Book of Abstracts. - SPb., 1997. - P-055 Рубрики: ХИМИЧЕСКИЕ НАУКИ |
N 52 New manganese(II) 2d-polymer with deprotonated hydroxytetrazine bridges [Text] / M. A. Kiskin [и др.] // Inorganic Chemistry Communications. - 2005. - Vol. 8, № 6. - P524-528 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: A reaction of pivalate polymer [Mn(OOCCMe3)2(EtOH)]n (1) with 3-hydroxy-6-(3,5-dimethylpyrazol-1-yl)-1,2,4,5-tetrazine (2, L) in EtOH solution under inert atmosphere gives rise to an antiferromagnetic 2D-polymer [Mn(?-N,N?O-3,5-Me2C3HN2C2(O)N4)2]n (4). According to the X-ray analysis data, M(L–H)2 units form a 2D-infinite network in the lattice of compound 4 where L–H is a starting deprotonated hydroxytetrazine. The reaction of 1 with bis[3,5-(dimethylpyrazolyl)]-1,2,4,5-tetrazine (3) in MeCN solution in air results in an antiferromagnetic hexanuclear pivalate cluster Mn6(?4-O)2(?-OOCCMe3)10(L1)4 (5) where L1 is a dimethylpyrazole molecule – product of hydrolytic splitting of initial bispyrazolyltetrazine. |
P 41 Pentanuclear pivalate Ni(II) and Co(II) clusters: Modulation of molecular structures and magnetic properties // Journal of Molecular Structure. - 2003. - Vol. 656, № 1-3. - P207-224 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): CLUSTER -- MAGNETIC PROPERTIES -- TRANSITION METAL Аннотация: Reaction of nickel cluster Ni9(HOOCCMe3) 4(?4-OH)3(?3-OH) 3(?n-OOCCMe3)12 (1) or cobalt pivalate polymer [Co(OH)n(OOCCMe3)2-n] x (7) with bis[3,5-(dimethylpyrazolyl)]-1,2,4,5-tetrazine (3) in MeCN solution was found as a result in the formation of isostructural pentanuclear clusters of composition M5(?3-OH) 2(?-OOCCMe3)4(?-N,N?,N? -3,5-Me2C3HN2C2(O)N 4)4(MeCN)2 (M = Ni (4), Co (8)) with a planar spirane metal core. Reaction of cobalt complex 7 with 3 in benzene gives rise to a pentanuclear cluster Co5(?3-OH)2(?-OOCCMe 3)4(?-N,N?,N?-3,5-Me2C 3HN2C2(O)N4)4(C 5N2H8)2 (9), containing coordinated pyrazole molecules as terminating ligands instead of labile MeCN ligands in 8. The reaction of cluster 8 with 2,6-diaminopyridine (T = 85 °C) in MeCN results in the substitution of MeCN ligands and formation of a new cluster Co5(?3-OH)2(?-OOCCMe3) 4(?-N,N?,N?-3,5-Me2C3HN 2C2(O)N4)4(C5H 7N3)2 (10) with two 2,6-diaminopyridine ligands instead of MeCN molecules. The reactions of 4 and 8 with NiCl 2·6H2O in MeCN/EtOH solution (3: 1) give rise to isostructural ferromagnetic pentanuclear chloro-bridged clusters M 5(?3-OH)2(?-CI)2(? -OOCCMe3)2(?-N,N?,N?-3,5-Me 2C3HN2C2 (O)N4) 2(?-N,N?,N?,O-3,5-Me2C3HN 2C2(O)N4)2(MeCN)2 (M = Co (11), Ni (12)). The reaction of 8 with solid COCl2·6H 2O in MeCN results in new seven-nuclear ferromagnetic cluster CO 5(?3-OH)2(?-CI)2(? -OOCCMe3)2(?-N,N?,N?-3,5-Me 2C3HN2- C2(O)N4) 2(?-N,N?,N?,O-3,5-Me2C3HN 2C2(O)N4)2(MeCN) 2[Co(CH3CN)CI2]2 (13). The molecular structures of 4, 8, 9, 10, 12 and 13 established by X-ray diffraction studies and magnetic behavior of new nickel and cobalt pivalate clusters are discussed. |
N 10 N-alkylation of chitosan by beta-halopropionic acids in the presence of various acceptors [Text] / A. V. Pestov, Yu. A. Skorik, G. Kogan, Yu. G. Yatluk // Journal of Applied Polymer Science . - 2008. - Vol. 108, № 1. - P119-127 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: N-carboxyethylation of chitosan by -halopropionic acids in the presence of various proton and halogen ion acceptors was investigated. It has been observed that carboxyethylation of chitosan in aqueous medium is accompanied by the by-processes of hydrolysis and dehydrohalogenation of the -halopropionic acids yielding -hydroxypropionic acid, bis(2-carbox-yethyl) ether, and acrylic acid. Degree of carboxyethyl substitution (DS) of chitosan and the relative rates of the by-processes varied significantly depending on the conditions used and nature of the proton or halogen ion acceptor. At carboxyethylation of chitosan with the alkaline -bromopropionates, the DS increased in the order Cs+ Rb- K+ sim; Na+ Li-. |
I-60 Influence of metal coordination on conductivity behavior in poly(butadiene-acrylonitrile)-CoCl2 system [Text] / O. V. Bushkova, I. P. Koryakova, Yu. A. Skorik, B.I. Lirova, A. V. Pestov, V. M. Zhukovskii // Electrochimica Acta. - 2008. - Vol. 53, № 16. - P5322-5333 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: The metal complex formation and the electrical properties of amorphous solid polymer electrolytes, based on poly(butadiene-acrylonitrile) copolymer (PBAN) and CoCl2, have been studied over the homogeneity region of the system limited by the CoCl2 concentration of 1.89 mol kg-1. It has been found that ionic conductivity is carried out by the unipolar anion transfer at lower CoCl2 concentrations (up to 0.10 mol kg-1). As the CoCl2 concentration increases, electronic conductivity appears in addition to ionic conductivity, and the former becomes dominant, starting from 0.38 mol kg-1. It has been shown that the nature of charge carriers is determined by the composition of metal complexes formed by CoCl2 and the macromolecular solvent PBAN. At lower concentrations, the [Co2L2Cl4]0 dimers are the predominant species (L being macromolecule side groups C{triple bond, long}N), and their dissociation is followed by the formation of mobile Cl- anions and immobile binuclear [Co2Cl3]+ complexes. As CoCl2 concentration increases, polynuclear [ConL2Cl2n]0 (n 2) complexes appear (L being C{triple bond, long}N and C{double bond, long}C groups of PBAN). Specific features of chemical bonds in ?-complexes of transition metals result in the appearance of electronic charge carriers. The abrupt increase in conductivity observed at the highest CoCl2 concentration is connected with the formation of a percolation network of polynuclear [ConL2Cl2n]0 complexes |
N 10 N-2-(2-pyridyl)ethylchitosan new chelate polymer [] : доклад, тезисы доклада / A. V. Pestov, S. Yu. Bratskaya, V. A. Avramenko, Yu. G. Yatluk // EUCHIS 2009 - 9th International Conference of the European Chitin Society , Venice, Italy, 23-26 May 2009 : conference book. - Venice, Italy, 2009. - 158 (P03-30). - Библиогр.: с. 158 (3 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ |
S 70 Solution properties of 2-carboxyethylchitosans [] : доклад, тезисы доклада / A. V. Pestov, S. Yu. Bratskaya, V. A. Avramenko, Yu. G. Yatluk // Asian Symposium Advanced Materials, Vladivostok, Russia, 1-4 October 2007 : Final Programme and Abstracts. - Vladivostok, 2007. - P. 1-17. - Библиогр.: с. P. 1-17 (4 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ |
P 80 Polymers Based on Epoxy Resins and Functional Derivatives of Polychlorobiphenyls [Electronic resource] / N. Yu. Ostanina, L. D. Dultseva, A. L. Suvorov, O. N. Chupakhin // Russian Journal of Applied Chemistry. - 2002. - Vol. 75, № 5. - P814-817 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: A new way to utilize polychlorobiphenyls was suggested: transformation of Sovol base hydrolysis products into glycidyl ethers and titanates. The resulting products were tested as components of epoxy compounds which are subsequently cured to obtain three-dimensional polymer networks \\\\Expert2\\nbo\\Russian Journal of Applied Chemistry\\2002, v. 75, N. 5, p.814.pdf |
T 45 Thiocarbamoyl chitosan as a novel sorbent with high sorption capacity and selectivity for the ions of gold(III), platinum(IV), and palladium [Electronic resource] / A. V. Pestov, S. Yu. Bratskaya, A. Slobodyuk, V. A. Avramenko, Yu. G. Yatluk // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2010. - Vol. 59, № 7. - P1303-1306 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): CHITOSAN -- THIOCARBAMOYL CHITOSAN -- IONS OF GOLD(III) Аннотация: Thiocarbamoyl chitosan (TCC) was synthesized by grafting thiourea on chitosan backbone in eutectic composition of ammonium thiocyanate—thiourea. Insoluble products with the amno group functionalization degree of 0.3–1.1 can be prepared by varying the conditions of polymer-analogous (synthesis in a gel) transformation. Structure of the synthesized chitosan derivatives was characterized by elemental analysis, diffuse reflectance infrared spectroscopy, and the solid state 13C NMR. Study of sorption properties of TCC shows high sorption capacity and selectivity for the ions of gold(III), platinum(IV), and palladium(II) as evidenced by results obtained at pH 2 in the presence of 100–1000-fold excess of iron(III), copper(II), zinc(II), and nickel(II). Sorption capacity of TCC for all ions increases with the increase in the degree of substitution and changes in the series: AuIII > PdII > PtIV \\\\Expert2\\nbo\\Russian Chemical Bulletin\\2010, 59 (7), 1303-1306.pdf |
P 17 Palladium and platinum sorption on a thiocarbamoyl-derivative of chitosan [Text] / A. Butewicz, K. Campos Galivan, A. V. Pestov, Yu. G. Yatluk, A. W. Trochimczuk, E. Guibal // Journal of Applied Polymer Science . - 2010. - Vol. 116, № 6. - P3318-3330 : рис. Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: Immobilizing thiourea onto chitosan allowed using the polymer for the recovery of platinum groups metals (PGMs) in acidic solutions (up to 1–2M HCl concentrations). At low HCl concentration protonated amine groups may sorb chloroanionic metal species (electrostatic attraction mechanism); however, most of sorption proceeds through chelation on sulfur containing groups (less sensitive to acidic conditions). The bi-site Langmuir equation was used for fitting sorption isotherms. The sorption of PGMs was weakly affected by the composition of the solution (presence of high concentration of anions and base metals). Maximum sorption capacities for Pd(II) and Pt(IV) ranged between 274 and 330 mg g?1 in 0.25M HCl solutions and decreased to 150–198 mg g?1 in 2M HCl solutions: Pd(II) sorption was systematically higher than Pt(IV) sorption. The pseudo-second rate equation was used for modeling the uptake kinetics. Agitation speed hardly affected uptake kinetics indicating that external diffusion resistance is not the rate controlling step. Desorption yield higher than 85% were obtained using thiourea in 0.1M HCl solution. The adsorbents could be reused for at least three cycles |
E 27 Effect of heterocyclic derivatives of ferrocene on free-radical polymerization of methyl methacrylate and styrene [Text] / R. M. Islamova, O. I. Golovochesova, Yu. B. Monakov, I. A. Utepova, A. A. Musikhina, O. N. Chupakhin // Polymer science. Series B. - 2010. - Vol. 52, № 11-12. - P637-647 : il. - Bibliogr. : p. 647 (13 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): HETEROCYCLIC DERIVATIVES -- FERROCENE -- FREE-RADICAL POLYMERIZATION -- METHYL METHACRYLATE -- STYRENE Аннотация: The free-radical bulk homopolymerization of methyl methacrylate and styrene initiated by benzoyl peroxide or AIBN in the presence of heterocyclic derivatives of ferrocene is studied. It is shown that, in the case of the peroxide initiator, ferrocene derivatives form highly efficient initiation systems, which make it possible to polymerize methyl methacrylate at a high rate, to reduce the molecular mass of polymers, and to synthesize polymers with a high content of syndiotactic triads, while in the case of AIBN, such systems are not formed. \\\\Cserver\\Dist\\НБО\\Электронная библиотека_Библиогр1\\Polymer science. Series B\\2010, V. 52, N 11-12, p. 637-647.pdf |
F 42 Ferro- and antiferromagnetic interactions in polymeric and molecular complexes of Cu(hfac)2 with 1-oxoazin-2-yl-substituted nitronyl nitroxides [Text] / O. N. Chupakhin, E. V. Tretyakov, I. A. Utepova, M. V. Varaksin, G. V. Romanenko, A. S. Bogomyakov, S. L. Veber, V. Ovcharenko // Polyhedron. - 2011. - Vol. 30, № 4. - P647-653. - Bibliogr. : p. 653 (9 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: Solid heterospin compounds based on Cu(hfac)2 complexes with a new group of nitronyl nitroxides bearing different azine-N-oxide substituents at position 2 of the 2-imidazoline ring (Ln) were studied. The major factor responsible for the change in the magnetic characteristics of the [Cu(hfac)2L1] complex with triazine nitronyl nitroxide with temperature was shown to be the specific pairwise packing of heterospin molecules with the dominant antiferromagnetic exchange between the radical fragments of adjacent molecules. For complexes of Cu(hfac)2 with 1-oxoazin-2-yl-substituted nitronyl nitroxides L2 and L4, 7-membered metallocycles were obtained, although they form rarely. It was shown that polymer chains formed in the solid complex with spin-labeled pyrazine-N-oxide [(Cu(hfac)2)3(L3)2] due to the cross-linking of {(Cu(hfac)2)2(L3)2} binuclear fragments via the bridging [Cu(hfac)2].???? \\\\Expert2\\nbo\\Polyhedron\\2011. v.30. p.647.pdf |
N 10 N-2-(2-pyridyl)ethyl chitosan: Synthesis in gel and sorption properties [Electronic resource] / A. V. Pestov, S. YU. Bratskaya, Yu. A. Azarova, M. I. Kodess, Yu. G. Yatluk // Russian Journal of Applied Chemistry. - 2011. - Vol. 84, № 4. - P713-718 : рис., табл. - Bibliogr. : p. 717-718 (16 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: A procedure was developed for preparing a new heterocyclically substituted chelating aminopolymer, N-2-(2-pyridyl)ethyl chitosan, by direct addition of 2-vinylpyridine to chitosan under the conditions of synthesis in gel. The resulting polymer has the degree of substitution of up to 1. The ability of the samples obtained to sorb transition and noble metal ions was evaluated \\\\Expert2\\nbo\\Russian Journal of Applied Chemistry\\2011, v. 84, N 4, p.713.pdf |
S 98 Synthesis of chelating polymer sorbents by using the S-N(H) methodology / A. V. Pestov, P. A. Slepukhin, Yu. G. Yatluk, V. N. Charushin, O. N. Chupakhin // Journal of Applied Polymer Science . - 2012. - Vol.125, №3. - С. 1970-1978 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): FUNCTIONALIZATION OF POLYMERS -- PHENOL -- X-RAY ANALYSIS Аннотация: The article describes a new synthetic approach to modify the structure of phenol-formaldehyde and resorcinol-formaldehyde resins, which enables one to functionalize a polymer matrix by using the S?NH (nucleophilic aromatic substitution of hydrogen) methodology. Direct heteroarylation of phenol (resorcinol) fragments in polymer chains with 1,2,4-triazine derivatives illustrates a new synthetic method in the polymer chemistry. The feature of this methodology is that it provides an opportunity to accomplish direct one-pot polymer transformations by incorporating of rather complicated chelating groups through the displacement of hydrogen in phenol moieties. It has been shown that in order to obtain chemically modified polymers on the basis of phenol-formaldehyde and resorcinol-formaldehyde resins with a high degree of substitution with chelating units, a polymer matrix has to react with 3-(pyridin-2'-yl)-1,2,4-triazin-5(2H)-one. Also, it has been found that polymer sorbents with a high selectivity can be obtained by using the template method. Targeted synthesis of model compounds, as structural units of the chelating polymers, and elucidation of the structure of their complexes with copper (II) ions have shown that the most plausible type of coordination is formation of the bridge 1 : 1 complexes of the a,a'-bipyridinyl type. |
S 98 Synthesis of poly[N-(2,3-dihydroxypropyl)aminostyrene], a new sorbent for boron(III) ions / D. V. Nesterov, L. S. Molochnikov, M. I. Kodess, E. G. Matochkina, O. V. Koryakova, Yu. G. Yatluk, A. V. Pestov // Russian Journal of Applied Chemistry. - 2013. - Vol.86, №5. - С. 777-781. - Библиогр.: с. 781 (33 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): AMINOSTYRENE -- NITRATION -- GLYCIDOL Аннотация: A procedure was developed for preparation of poly[N-(2,3-dihydroxypropyl)aminostyrene] via successive stages of nitration, reduction, and glycidol treatment of polystyrene, which gives the polymer with a maximal degree of functionalization. The composition and structure of the intermediates and end products of the polymer-analogous reactions were characterized by elemental analysis, IR spectroscopy, and solid-state 13C NMR spectroscopy. The sorption characteristics of poly[N-(2,3-dihydroxypropyl)aminostyrene] toward boroncontaining ions were assessed \\\\expert2\\NBO\\Russian Journal of Applied Chemistry\\2013, v. 86, N 5, p.777.pdf |
S 98 Synthesis in a gel and sorption properties of N-2-sulfoethyl chitosan / A. V. Pestov, Yu. S. Petrova, A. V. Bukharova, L. K. Neudachina, O. V. Koryakova, E. G. Matochkina, M. I. Kodess, Yu. G. Yatluk // Russian Journal of Applied Chemistry. - 2013. - Vol.86, №2. - С. 269-272. - Библиогр.: с. 272 (24 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): CHELATES -- AMINO-CONTAINING POLYMER -- N-2-SULFOETHYL CHITOSAN Аннотация: A new procedure was developed for preparation of chelate amino-containing polymer N-2-sulfoethyl chitosan by synthesis in a gel through the reaction between chitosan and sodium 2-bromoethanesulfonate, yielding a polymer with the degree of substitution of up to 0.5. The structure of the resulting polymers was confirmed by 1H NMR spectroscopy. The sorption characteristics with respect to transition and alkaline-earth metal ions were determined for the cross-linked polymers \\\\expert2\\NBO\\Russian Journal of Applied Chemistry\\2013, v. 86, N 2, p.269.pdf |
N 89 Novel methods for synthesis and sorption properties of N,O-(2,3-dihydroxy)propylchitosan [Electronic resource] / D. V. Nesterov, L. S. Molochnikov, A. V. Pestov, E. G. Matochkina, M. I. Kodess, Yu. G. Yatluk // Polymer science. Series B. - 2013. - Vol.55, №7-8. - 490-495. . - Bibliogr. : p. 494-495 (36 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): GLYCIDOL -- CHITOSAN -- GEL MEDIUM Аннотация: The direct addition of glycidol to chitosan in a gel medium under exposure to ultrasound afforded the chelating aminopolymer N,O-(2,3-dihydroxy)propylchitosan with a degree of substitution up to 2.3. The sorption characteristics of the crosslinked aminopolymers with respect to boron-containing ions were estimated \\\\expert2\\NBO\\Polymer Science. Series B\\2013, V. 55, N 7-8, p. 490-495.pdf |
H 99 Hydrophilic nature and sorption—diffusion properties [Electronic resource] / A. I. Suvorova, A. L. Suvorov, I. S. Tyukova, N. N. Malysheva, A. V. Okhokhonin // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2013. - Vol. 61, №3. - С. 555-562. - Bibliogr. : p. 562 (34 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): POLYSULFONE -- SILICA -- SOL—GEL PROCESS Аннотация: Hybrid nanocomposite films containing silica (11.4 wt.%) or titania (18.8 wt.%) in the polymer matrix were prepared by the sol—gel method using the hydrolytic polycondensation of tetraethoxysilane and tetrabutoxysilane in a THF solution of aromatic polymer, polysulfone (PSF). The influence of the oxide nature and the film composition on the structure, the interaction of the polymer with oxides, hydrophilicity, and sorption—diffusion properties of the hybrid films were studied by FTIR spectroscopy, atomic force microscopy, dynamic light scattering, and a complex of other physicochemical methods. The absence of chemical or intermolecular hydrogen bonds between the polymer and oxide particles in the PSF films was shown. The average size of the oxides (SiO2, 20 nm; TiO2, ~90 nm) in the films and roughness of their surface (~0.2—0.8 nm) were determined. The introduction of oxides into the polymer matrix increases the hydrophilic properties and the ability of the PSF films to swell in water; the diffusion coefficients of water and permeability of water vapor in the PSF films also increase. Titania also induces a more considerable change in the structure of the polymer matrix and more strongly affects the sorption—diffusion properties of the hybrid films in aqueous solutions of THF. All prepared nanocomposite films PSF/SiO2 and PSF/TiO2 are capable of extracting an organic component from aqueous solutions and can be used as sorbents and membrane films for the removal of organic substances from the aqueous medium \\\\expert2\\NBO\\Russian Chemical Bulletin\\2012, 61 (3), 555-562.pdf |
I-55 Imidazole-containing chitosan derivative: a new synthetic approach and sorption properties [Electronic resource] / A. V. Pestov, S. YU. Bratskaya, Yu. A. Azarova, Yu. G. Yatluk // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2012. - Vol.61, №10. - С. 1959-1964. - Bibliogr. : p. 1963-1964 (33 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): CHITOSAN -- SORBENT -- GOLD(III) Аннотация: A novel method for the synthesis of a hetaryl containing chelate amino polymer, namely, N (4(5) imidazolylmethyl)chitosan (IMC), with a degree of substitution up to 0.3 was pro posed. The "synthesis in gel" approach involves direct substitution of the hydroxyl group in 4(5) imidazolylmethanol. The structures of these polymers were confirmed by 1H NMR data. For sorption studies, IMC samples were crosslinked with epichlorohydrin and diglycidyl ethers of ethylene glycol and diethylene glycol. The degrees of swelling and sorption properties of the polymers largely depend on the crosslinking agent and the degree of crosslinking. The sorption capacities of IMC for AuIII, PtIV, and PdII ions are higher than those of the nonmodified polymer. The extraction of noble metal ions from chloride solutions becomes more selective with increasing degree of crosslinking. The sorption capacity of IMC for CoII and NiII ions is higher than those of chitosan and its known N heterocyclic derivatives \\\\expert2\\NBO\\Russian Chemical Bulletin\\2012, 61 (10), 1959-1964.pdf |
I-83 Iptycene-Based Fluorescent Sensors for Nitroaromatics and TNT / P. Anzenbacher, Jr. L. Mosca, M. A. Palacios, G. V. Zyryanov, P. Koutnik // Chemistry - A European Journal. - 2012. - Vol.18, №40. - С. 12712-12718. - Bibliogr. : p. 12718 (15 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): EXPLOSIVES -- FLUORESCENCE SPECTROSCOPY -- NANOFIBRES -- SENSORS Аннотация: Small-molecule fluorescent sensors (1–5) for the recognition of nitroaromatic compounds, such as 2,4-dinitrotoluene and the explosive TNT, were obtained by using a three-step dehydrohalogenation cycloaddition protocol. The interaction of the receptors and nitroaromatics was studied both in solution and in the solid state by using fluorescence spectroscopy and X-ray crystallography, respectively. It is shown that the iptycene receptors 1–5 provide a cavity suitable for binding nitroaromatic compounds in an edge-to-face mode, rather than simple ring-stacking interactions. The results obtained inspired us to develop an inexpensive, reliable and robust sensor for vapour detection of explosives. Polymer nanofibres are particularly suitable for the production of such TNT sensors as they accelerate the mass exchange between the polymer and the vapours of TNT. Quenching of the sensors took place within 1 min compared to 10 min for a glass-slide assay. Hence, the sensor performance can be improved by optimising the matrix material and morphology without resynthesising the sensor moieties \\\\expert2\\NBO\\Chemistry - A European Journal\\2012. v. 18, N 40. p. 12712.pdf |