Phosphaphenanthrene group has characteristics of heterocycle containing phosphorus, molecular non-coplanar, interaction with intermolecular and intramolecular groups, molecular polarity ,etc. Therefore, it can be used as a modification group to construct compounds with novel structure and properties. In this thesis, the synthesis methods of compounds based on phosphaphenanthrene group, properties of functional materials containing phosphaphenanthrene group and the influence law of the group on properties of materials are reviewed. The preparing method and mechanism of phosphaphenanthrene derivatives from that P-H bond of 9,10-dihydro-9-oxa-10-phosphaphenanthrene 10-oxide react with unsaturated groups including quinine bond、aldehyde bond、ketone bond、C=C double bond、C=N bond and C≡N triple bonds by adding reaction are introduced . The fire retardant properties of materials containing phosphaphenanthrene group including epoxy resins,polyesters,coating and additive, and the mechanism of phosphaphenanthrene group enhancing fire retardant properties of materials are mainly summarized . Phosphaphenanthrene group also influence liquid crystal behavior of thermal liquid crystal polymers for its interaction with intermolecular and intramolecular groups, and the interaction lead to aggregation-induced emission enhancement behavior of some compounds. Finally, we mention that the polarity of phosphaphenanthrene group can increase the molecular polarity of polyester and polyamides compounds, and make compounds get better organic solubility.
Contents
1 Introduction
2 Construct novel compounds containing phosphaphenanthrene group by utilizing the easily reacting property of P-H bond
3 Fire retardant property of compounds containing phosphaphenanthrene
3.1Fire retardant epoxy resins
3.2 Fire retardant polyesters
3.3Fire retardant coating and additive
4 The effect of phosphaphenanthrene group on molecular aggregation state
4.1The thermal liquid crystal behavior of compounds containing phosphaphenanthrene group
4.2The Luminescent behavior of compounds based on phosphaphenanthrene group
5 Molecular polarity
6 Prospects