Phase polymorphism of [Zn(DMSO)6](ClO4)2 studied by differential scanning calorimetry |
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Authors: | A Migda?-Mikuli E Szostak |
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Institution: | Department of Chemical Physics, Faculty of Chemistry, Jagiellonian University, ulica Ingardena 3, 30-060 Kraków, Poland |
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Abstract: | Four solid phases of Zn(DMSO)6](ClO4)2 have been detected by differential scanning calorimetry (DSC). Specifically, the phase transitions were detected between: metastable phase KII ↔ supercooled phase K0 at , stable phase KIb ↔ stable phase KIa at , stable phase KIa ↔ stable phase K0 at . At Tm2 = 389 K crystals partially and at Tm1 = 465 K completely melts. From the entropy change values it was concluded that the phases: K0 and K0′ are the orientationally dynamically disordered phases, so called ODDIC crystals, and phases KIa, KIb and metastable KII are dynamically ordered but with some degree of positional disorder. |
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Keywords: | Hexadimethylsulphoxidezinc(II) chlorate(VII) Phase transitions Two-stage melting ODDIC DSC |
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