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Chirality and the t...
Chirality and the thermophysical properties of molecular solid phases under pressure: (+)- and (±)-camphor
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- Andersson, Ove (författare)
- Umeå universitet,Institutionen för fysik
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- Ross, Russell G. (författare)
- Umeå universitet,Institutionen för fysik
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- Jezowski, Andrzej (författare)
- Umeå universitet,Institutionen för fysik,Institute for Low Temperature and Structure Research, Polish Academy of Sciences, Wrocław, Poland
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(creator_code:org_t)
- 2007-10-26
- 1990
- Engelska.
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Ingår i: Molecular Physics. - : Taylor & Francis Group. - 0026-8976 .- 1362-3028. ; 70:6, s. 1065-1083
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Thermal conductivity λ, heat capacity per unit volume pcP and P-T phase diagrams are investigated for both (+)- and (±)-camphor. The transient hotwire method is used at temperatures in the range 100–430 K and at pressures up to 1·75 GPa. We detect solid phases I-IV for (+)-camphor and I′-V′ for (±)-camphor. We conclude that λ is independent of enantiomeric composition for plastic-crystal phase pairs I-I′, II-II′ and IV-IV′. Phase V′ also appears to be a plastic-crystal phase. Non-plastic phases III and III′ show a variation of λ with T that differ considerably from that expected for a simple crystal, with the greatest such difference being observed for the racemic compound III′. An unannealed specimen of the racemic compound III′ is probably chirally disordered and shows a variation of λ with T for T < 130 K, which may indicate phonon-assisted fracton hopping.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- Thermal conductivity
- heat capacity
- specific heat
- chirality
- dextro
- levo
- mixed chirality
- racemic
- chiral disorder
- plastic crystal
- camphor
- phase diagram
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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