Abstract
1,6-di (9-carbazolyl)-2,4-hexadiyne has a first-order phase transition at 142 K at one atmosphere pressure. The boundaries between the high and low-temperature phase regions in single crystals were observed by optical microscopy and their dynamics recorded using video techniques. Crystal-lattice parameters measured close to the phase transition show that the commonest phase boundaries occur on crystallographic planes across which the lattice mismatch in the two structures is a minimum. Complex phase-boundary structures are observed in regions of high strain in the crystals. Repeated cycling through the transition leads ultimately to the destruction of the crystals.
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Bloor, D., Chalmers, I.F., Kennedy, R.J. et al. Phase-transition boundaries in 1,6-di(9-carbazolyl)-2,4-hexadiyne. J Mater Sci 20, 674–681 (1985). https://doi.org/10.1007/BF01026542
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DOI: https://doi.org/10.1007/BF01026542