Zobrazeno 1 - 10
of 32
pro vyhledávání: '"Zbyněk Plzák"'
Publikováno v:
Chemické listy. 116:296-300
The article provides an overview of the role of standards, their development, characteristics, validity and retrieval, including the way of how to obtain their full texts. It discusses international, European and Czech standardization bodies. It also
Autor:
Jaromír Plešek, Jan Šubrt, Zbyněk Plzák, Tomáš Matys Grygar, Tomáš Baše, Zdeněk Bastl, and Eva Večerníková, Michael J. Carr, Otomar Křı́ž, Jaroslav Boháček, Václav Malina
Publikováno v:
Langmuir. 21:7776-7785
Four different carboranethiol derivatives were used to modify the surfaces of gold nanoparticles and flat gold films. The novel materials engendered from these modifications are extraordinarily stable species with surfaces that support self-assembled
Publikováno v:
Journal of the Chemical Society, Dalton Transactions. :2954-2959
The reaction between nido-B10H14 and PCl3 in the presence of proton sponge (PS = 1,8-bis(dimethylamino)naphthalene) in CH2Cl2 yielded a mixture of icosahedral diphosphaboranes from which 1,2-closo-P2B10H10 (1a) and its mono- and di-chloro derivatives
Autor:
Josef Holub, Bohumil Štíbr, Drahomír Hnyk, Mario Bakardjiev, Tomáš Jelínek, Ivana Císařová, Zbyněk Plzák
Publikováno v:
Chemistry. 7:1546-1554
The reaction between the carborane arachno-4,6-C2B7H13 (1) and PCl3 in dichloromethane in the presence of a "proton sponge" (PS = 1,8-dimethylaminonaphthalene) resulted in the isolation of the eleven-vertex nido-diphosphadicarbaboranes 7,8,9,11-P2C2B
Publikováno v:
Collection of Czechoslovak Chemical Communications. 66:1499-1507
The C-H vertices of ortho-carborane and its derivatives can be smoothly cyanoethylated with acrylonitrile in the presence of benzyl(triethyl)ammonium hydroxide in a two-phase system: dichloromethane/water or 1,2-dimethoxyethane/water. The reaction is
Publikováno v:
Collection of Czechoslovak Chemical Communications. 64:971-976
The oxidation of the [nido-6,9-C2B8H10]2- (1) dianion with CuCl2, is supposed to proceed via an unstable closo-2,6-C2B8H10 (2) intermediate, which is then rearranged into closo-1,6-C2B8H10 (3) (yields 30-35%). The synthesis is accompanied by the form
Autor:
Bohumír Grüner, Zbyněk Plzák
Publikováno v:
Journal of Chromatography A. 789:497-517
A wide range of chromatographic approaches in high-performance liquid chromatography (HPLC) is available for the efficient separation and determination of different families of boron-cluster compounds. Liquid–solid, reversed-phase, ion-pair, ion an
Autor:
Ivana Cisarova, Francesc Teixidor, Drahomír Hnyk, Clara Viñas, P. V. R. Schleyer, Bohumil Štíbr, Zbyněk Plzák, Josef Holub, Jiří Fusek
Publikováno v:
Journal of the American Chemical Society. 119:7750-7759
Deamination of 7-(Me3N)-nido-7,8,9-C3B8H10 (1a) leads either to the parent tricarbollide anion [nido-7,8,9-C3B8H11]- (2-) or to the neutral tricarbaborane nido-7,8,9-C3B8H12 (2a), together with a small amount of 8-Me-nido-7,8,9-C3B8H11 (2b). Di- and
Autor:
John D. Kennedy, Bohumír Grüner, Clara Viñas, Tomáš Jelínek, Bohumil Štíbr, Josef Holub, Zbyněk Plzák, Francesc Teixidor, Jiří Fusek
Publikováno v:
Collection of Czechoslovak Chemical Communications. 62:1229-1238
A modification of the Plesek reaction has been employed to improve the yield in the synthesis of the parent nido ten-vertex dicarbaborane 5,6-C2B8H12, and to synthesize some of its 5- and 6-substituted derivatives. The method is based on the oxidatio
Publikováno v:
Collection of Czechoslovak Chemical Communications. 62:1403-1412
A selective and rapid procedure was developed for the determination of trace amounts of butyltin compounds in sediments by capillary gas chromatography with mass spectrometric detection. Analytes were isolated from the sediment samples by extraction