As the formation of O-H bond between molecules and separation of bonding electrons, the strengths of covalent bonds of N-O and N-H in the middle molecules of the chain decrease, but those of C-C and C-N increase.

• 由于分子间氢键的形成,使得成键电子分散,链中间TATB分子的N-O和N-H键的共价键减弱,而C-C和G-N共价键增强。