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Citation: Huang Wei-Jun, Zhou Yan-Zhu, Tan Fu, Huang Xiu-Lan, Yang Bao-Jin. Study on O-Quinonoid Form Homologues by DSC[J]. Acta Physico-Chimica Sinica, ;1992, 8(06): 795-798. doi: 10.3866/PKU.WHXB19920615 shu

Study on O-Quinonoid Form Homologues by DSC

1.
Institute Chemistry, Academia Sinica, Beijing 100080; Shanghai Institute of Materia Medica, Academia Sinica, Shangai 200031

Received Date: 7 May 1991
Available Online: 15 December 1992

This paper presents the study on thermodynamic characteristics of phase transitions for tanshinone Ⅱ-A, tanshinone Ⅱ-B and saprorthoquinone (hereafter abbreviated to 1,2 and 3 respectively) by Differential Scanning Calorimetry (DSC). The relationships of their molecular structures with thermodynamic parameters were discussed. The experimental results obtained are listed in Table 2.
The differences of nominated compounds for their melting points, melting enthalpies and melting entropies are as follows:
T_m~1>T_m~3, ΔH_m~1>ΔH_m~3, ΔS_m~1=ΔS_m~3;
T_m~1>T_m~2, ΔH_m~1>ΔH_m~2, ΔS_m~1=ΔS_m~2.
- o-quinonoid form materials; Differential Scanning Calorimetry; Thermodynamics of drug
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