本文利用无机酸系列的酸强度(pKa值)与羟基上氧原子的亲电子超离域度S(E)成线性关系的规律性,找出聚硅酸系列的相应线性方程为:并由此推测低聚硅酸溶液中可能存在的硅酸结构:在三聚硅酸溶液中主要存在着六元平面环的三聚体;在四聚硅酸中则主要存在着三种环状的四聚体。 In this paper, the linear relationship between the acid strength (pKa) of inorganic acid series and the electron affinity of oxygen atom on the hydroxyl group is linear, and the corresponding linear equation of polysilicic acid series is found It is speculated that there may be silicic acid structure in the oligosilicic acid solution: the trimer of the six-membered planar ring exists mainly in the tetrasilicic acid solution; in the tetrasilicic acid, there are mainly three kinds of cyclic tetrameric body.