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Inne
Hydrogen bonded NHO chains formed by chloranilic acid (CLA) with 4,4'-di-t-butyl-2,2'-bipyridyl(dtBBP) in the solid state.
Autorzy
Rok wydania
2012
Czasopismo
Numer woluminu
392
Strony
114-121
DOI
10.1016/j.chemphys.2011.10.033
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
In crystalline state 2,5-dichloro-3,6-dihydroxy-p-benzoquinone (chloranilic acid, CLA) forms with 4,4′-di-t-butyl-2,2′-bipyridyl (dtBBP) the hydrogen bonded chains along the b-axis. From one side of the CLA molecule the proton transfer takes place and the hydrogen bond length is very short (2.615 Å). A continuous infrared absorption is observed for dtBBP·CLA in the wavenumber range between 3100 and 800 cm−1 also indicating the strong hydrogen bonds. The DSC measurements show a weak, close to continuous, phase transition at 414 K. The complex dielectric permittivity for a single crystal sample was measured in the temperature range 100–440 K and at frequencies between 200 Hz and 2 MHz. The dielectric response is a combination of semiconducting properties and a relaxation process most probably connected with the proton dynamics in the hydrogen bonds. The mechanism of the structural phase transition is discussed.
Słowa kluczowe
molecule, 5-dichloro-3, 6-dihydroxy-p-benzoquinone, chloranilic acid, lanthanides, 4'-di-t-butyl-2, 2'-bipyridyl, molecular complexes, crystal structure, Infrared, dielectric response, phase transition, Hydrogen bond, stacking, DFT calculations
Adres publiczny
http://dx.doi.org/10.1016/j.chemphys.2011.10.033
Strona internetowa wydawcy
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