Influence of the growing conditions on thermochromic properties of [NH₂(C₂H₅)₂]₂CuₓZn₁-ₓCl₄ crystals

• Datum: 2005
• Hauptverfasser: Kapustianyk, V., Korchak, Yu., Rudyk, V., Batiuk, A.
• Format: Artikel
• Sprache: English
• Veröffentlicht: НТК «Інститут монокристалів» НАН України 2005
• Schriftenreihe: Functional Materials
• Online Zugang: http://dspace.nbuv.gov.ua/handle/123456789/139322
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Zitieren: Influence of the growing conditions on thermochromic properties of [NH₂(C₂H₅)₂]₂CuₓZn₁-ₓCl₄ crystals / V. Kapustianyk, Yu. Korchak, V. Rudyk, A. Batiuk // Functional Materials. — 2005. — Т. 12, № 4. — С. 775-780. — Бібліогр.: 18 назв. — англ.

The absorption spectra of [NН₂(C₂Н₅)₂]₂CuCI₄ crystals grown from ethanol solution as well as of [NН₂(C₂Н₅)₂]₂ZnCI₄ ‧nН₂О, [NН₂(C₂Н₅)₂]₂Cu₀.₂₅Zn₀.₇₅CI₄ crystals grown from water solutions have been investigated in the visible spectral region. The influence of ionizing irradiation on these spectra has been studied as well. The [NН₂(C₂Н₅)₂]₂CuCI₄ crystal grown from the ethanol solution has been shown to undergo the thermochromic phase transition at a higher temperature (Тᴛ ʰ = 324.5 К) and to manifest a higher sensitivity to ionizing irradiation influence as compared to the similar crystal grown from water solution. 75 % substitution of copper ions by zinc at the Transition to [NН₂(C₂Н₅)₂]₂Cu₀.₂₅Zn₀.₇₅CI₄ solid solution results in the change of the thermochromic phase transition character from the discontinuous to continuous one. The high sensitivity of the exciton absorption band long-wave edge location to low doses of ionizing radiation in [NН₂(C₂Н₅)₂]₂ZnCI₄‧nН₂О hydrated crystal has been revealed.