Towards a temperature-guided molecular switch: an unusual reversible low-temperature polymorphic phase transition in a conformationally locked environment.
A conformationally locked tetraacetate undergoes, quite akin to a temperature-guided molecular switch, a reversible thermal switching between two polymorphic modifications; the room-temperature alpha-form converted at -4 degrees C to a low-temperature denser beta-form, which displayed an unusual kinetic stability till 67 degrees C and transformed back to the alpha-form beyond this temperature.
Mehta
Goverdhan
G
Department of Organic Chemistry, Indian Institute of Science, Bangalore 560 012, India. gm@orgchem.iisc.ernet.in
Sen
Saikat
S