On the Crystallography and Thermodynamics in Orientationally Disordered Phases in Two-Component Systems

Heat capacity measurement of organic thermal energy storage materials

“…The focus of experimental thermodynamic studies has been on binary systems, primarily to change the transition temperatures and evaluate the possibility of using binary [11] 23,540 [11] Body center cubic (BCC) 380 [11] 3330 [11] a = 8.613(3) Å , b = 11.037(4) Å , c = 6.105(2) Å , b = 93.57(1)°, Z = 4, T = 293 K [41] 353.72 [12] 23,460 ± 750 [12] a = 6.753(7) Å , Z = 4, T = 353 K [37] 384.08 [12] 2780 ± 50 [12] 355.66 (351.05) ± 0.28 a 23,548 ± 159 a 384.08 (380.26) ± 0.57 a 2755 ± 54 a TRIS Orthorhombic 408 [11] 32,690 [11] Body center cubic (BCC) 445 [11] 3340 [11] a = 8.844(1) Å , b = 7.794(1) Å , c = 8.795(1) Å , Z = 4, T = 295 K [42] 407.56 ± 0.01 [9] 33,420 ± 210 [9] 443.6 ± 0.1 [9] 2410 ± 170 [9] 409.2 (405.12) ± 0.37 a 33,475 ± 440 a a = 6.876(6) Å , Z = 2, T = 423 K [42] 444.57 (440.59) a, * 3104 a, * NPG Monoclinic 313 [11] 13,630 [11] Face center cubic (FCC) 399 [11] 4600 [11] a = 5.979(1) Å , b = 10.876(2) Å , c = 10.099(2) Å , b = 99.78(1)°, Z = 4, T = 293 ± 1 K [43] 314.5 ± 0.1 [14] 12,520 ± 20 [14] a = 8.854(8) Å , Z = 4, T = 314.6 K [37] 314.8 [13] 12,410 ± 80 [13] 403.3 [13] 4440 ± 50 [13] 315.14 (311.18) a, * 12,238 a, * 401.63 (397.13) a, * 4225 a, * * For pure TRIS and NPG, the enthalpy and temperature of fusion is reported only for Dataset 3 and Dataset 2, respectively. For temperaures of transitions the value in pareantheses represents the onset temperature.…”

Organic alloy systems suitable for the investigation of regular binary and ternary eutectic growth

“…Some reported examples for binary plastic crystal alloys showing eutectic reaction are Camphor-SCN [3][4][5], NPA-SCN [6], HCE-TBM [3,7,8], AMPD-NPG [9] (and references therein), SCN-TBM [3,10], PG-TRIS [11] and AMPD-PG [12] (abbreviations used in this article are defined in Appendix A). On the other hand, no hints in literature on the existence of ternary eutectic alloys formed from these or other binary systems involving plastic crystals have been found by the authors, for which we were looking in the frame of a European joined research project (SETA) dealing with the basics of ternary eutectic solidification.…”

Polymorphism of 1,3-X-adamantanes (X = Br, OH, CH3) and the crystal plastic phase formation ability

“…[23][24][25][26][27][28][29][30][31][32][33] Many, but not all, of these substituted compounds display a plastic phase. Moreover, the existence of a hydrogen bonding scheme is not a condition to preclude orientational disorder [23,[34][35][36][37]. Within this concern, Hulme et al [38] suggested that the existence of orientational disorder, i.e., the existence of a plastic crystal phase, can be hindered by specific intermolecular interactions such as hydrogen bonding.…”

“…Within this concern, Hulme et al [38] suggested that the existence of orientational disorder, i.e., the existence of a plastic crystal phase, can be hindered by specific intermolecular interactions such as hydrogen bonding. Nevertheless, it has been demonstrated that for more or less "globular shaped molecules", such an interaction cannot prevent the plastic crystal forming ability [23,[34][35][36][37]. Thus, the ability to display such a disordered phase is still a matter of Please do not adjust margins Please do not adjust margins debate and a clear balance between intermolecular interactions and globular shape of the molecular entities is still unknown.…”