Phase diagrams in the binary systems of 2,4,7-trinitrofluoren-9-one with aromatic and heteroaromatic compounds

Phase diagrams of the binary systems formed by 2,4,7-trinitrofluoren-9-one (TNF) and naphthalene (N), anthracene (AN), pyrene (P), fluorene (F), dibenzothiophene (DBT) or carbazole (C) have been elaborated by differential scanning calorimetry and hot-stage microscopy. Apart from known 1 : 1 charge transfer complexes, the existence of incongruently melting DA₂ compounds has been found in ANTNF, PTNF and CTNF systems Evidence of a solid—solid transition in the C · TNF complex is also given.The literature data for the eutectic temperature and composition in ANTNF and CTNF systems have been verified and completed and the melting enthalpies of DBT,C, N · TNF, AN · (TNF)₂, P · (TNF)₂, F · TNF, DBT · TNF, C · TNF and C · (TNF)₂ are given.