Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Jacek Pecyna"'
Publikováno v:
Molecules, Vol 24, Iss 20, p 3779 (2019)
We have examined the insertion of carbenes carrying leaving groups into the [nido-B11H13]2− dianion to form the [closo-1-CB11H12]− anion. The best procedure uses CF3SiMe3 and LiCl as the source of CF2. It is simple, convenient and scalable and pr
Externí odkaz:
https://doaj.org/article/1ad8b83d3a944b07bc87dc82469e5f5f
Autor:
Anna Pietrzak, Piotr Kaszynski, Andrienne C. Friedli, Rafal Jakubowski, Muhammad O. Ali, Jacek Pecyna
Publikováno v:
Dalton Transactions. 50:3671-3681
A series of liquid crystalline pyridinium and sulfonium derivatives of the [closo-1-CB9H10]− and [closo-1-CB11H12]− anions containing the CH2CH2 linking group was prepared and their molecular and crystal structures were determined by single cryst
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3e883364bdf323ba7c20bb8d848fdcd8
https://doi.org/10.1039/d1dt00211b
https://doi.org/10.1039/d1dt00211b
Autor:
Jacek Pecyna, Jakub Wojciechowski, Anna Pietrzak, John C. Lasseter, Damian Pociecha, Muhammad O. Ali, Andrienne C. Friedli, Piotr Kaszynski, Remigiusz Żurawiński
Publikováno v:
Chemistry – A European Journal. 25:2616-2630
Two series of 1,12-bis-zwitterionic derivatives of the [closo-B12 H12 ]2- anion (B), containing either two 4-alkoxypyridinium groups (1B[n]-p) or one 4-alkoxypyridinium and one 4-pentylthianium groups (2B[n]-p), were prepared and their structural (XR
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::28b522831d9839faaacb02796534b7d7
https://doi.org/10.1002/chem.201805392
https://doi.org/10.1002/chem.201805392
Autor:
Rafał, Jakubowski, Jacek, Pecyna, Muhammad O, Ali, Anna, Pietrzak, Andrienne C, Friedli, Piotr, Kaszyński
Publikováno v:
Dalton transactions (Cambridge, England : 2003). 50(10)
A series of liquid crystalline pyridinium and sulfonium derivatives of the [closo-1-CB9H10]- and [closo-1-CB11H12]- anions containing the CH2CH2 linking group was prepared and their molecular and crystal structures were determined by single crystal X
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::ee5f36f7306f385b1b4783e1f57efdd4
https://pubmed.ncbi.nlm.nih.gov/33630008
https://pubmed.ncbi.nlm.nih.gov/33630008
Autor:
Serhii Pakhomov, Remigiusz Żurawiński, Damian Pociecha, Jacek Pecyna, Piotr Zagórski, Piotr Kaszynski
Publikováno v:
European Journal of Inorganic Chemistry. 2016:2923-2931
A series of substituted 12-sulfonium zwitterions 1[n] and one example of a 1-sulfonium analogue 2[5]a were prepared in four steps. Derivatives 1[n] exhibit rich crystalline polymorphism and a high-temperature SmBcry phase stabilized by dipolar intera
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c0f89951569ad9dcc83ef6420e13b7d6
https://doi.org/10.1002/ejic.201600240
https://doi.org/10.1002/ejic.201600240
Autor:
Muhammad O, Ali, John C, Lasseter, Remigiusz, Żurawiński, Anna, Pietrzak, Jacek, Pecyna, Jakub, Wojciechowski, Andrienne C, Friedli, Damian, Pociecha, Piotr, Kaszyński
Publikováno v:
Chemistry (Weinheim an der Bergstrasse, Germany). 25(10)
Two series of 1,12-bis-zwitterionic derivatives of the [closo-B
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::41d09b7997a426503d5597be55a534cb
https://pubmed.ncbi.nlm.nih.gov/30560574
https://pubmed.ncbi.nlm.nih.gov/30560574
Publikováno v:
Journal of Materials Chemistry C. 3:11412-11422
A series of mesogenic derivatives of o-carborane was synthesized, their properties were analyzed by thermal, optical and XRD methods, and results were compared with those of isostructural p-carborane and benzene analogues. Comparative analysis reveal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1c8268ce38a0b9e3a5aea77166467e2e
https://doi.org/10.1039/c5tc02046h
https://doi.org/10.1039/c5tc02046h
Publikováno v:
Liquid Crystals. 41:1188-1198
Weakly polar–polar isosteric pairs of 12-vertex p-carborane [closo-1,12-C2B10H12] (1[12]) and monocarbaborate [closo-1-CB11H12]− (2[12]) nematic liquid crystals, in which the difference in the calculated molecular dipole moment is 11.3 D, were sy
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5d1ee4e66791b1631862acf69549055c
https://doi.org/10.1080/02678292.2014.911371
https://doi.org/10.1080/02678292.2014.911371
Publikováno v:
J. Mater. Chem. C. 2:2956-2964
Two series of polar compounds 3[n] and 4[n] with longitudinal dipole moments ranging from 10 to 17 D were synthesized and investigated as additives to two nematic hosts, ClEster and CinnCN. Compounds 3[n] do not exhibit liquid crystalline behavior an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::448ab159fd9eab0b3b626e2f10f87b76
https://doi.org/10.1039/c4tc00230j
https://doi.org/10.1039/c4tc00230j
Publikováno v:
J. Mater. Chem. C. 2:1585-1591
Substituted closo-carbaborate–pyridinium zwitterions were prepared in 35–50% yield by reacting 1-amino-closo-1-carbaborates with 4-alkoxypyrylium triflates. Two of the new materials, 1[6]d and 2[10]b, exhibit a high temperature SmA phase, whose s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0425831bcfb475d07936471ff720679b
https://doi.org/10.1039/c3tc32351j
https://doi.org/10.1039/c3tc32351j