The frequencies of the carbonyl stretching vibrations in single solvent systems were correlated with empirical parameters of solvent polarity that include single empirical parameters and multiparameter .

E_T(30) dye-2,4,6-triphenyl-N-(2,6-diphenylphenolate)-pyrylium,which is the standard probe molecules of the empirical scale of solvent polarity,is synthesized with easily available reactants/reagents,simple equipments and mild reaction conditions.

An experiment extracting 9 coal-bearing source rocks and 3 lacustrine source rocks with four different polarity solvents , hexane, benzene, dichloroformethane,chloroform,shows that, with the increase of polarity of solvents, the content of extracts increases, and the relative.

The extracting experiment of source rocks with four different polarity solvents, hexane, benzene, dichloro-formethane and chloroform, shows that polarity of solvents controls the content and chemical composition of extracts.

Study on preparing molecular imprinting polymer in polar solvent;

In polar solvents, the swelling ratio of Shenhua coal was larger than that of Xinzhuang coal having a high coal rank; however, in non-polar solvent tetralin, it was smaller.

The effect of polar solvent(TBP,P350, 2-ethy hexanol) as additive agent on the properties of emulsion liquid membrane with N 263 as carrier was studied.

Influence of empirical parameters m and s on rock mass strength;

Through utilizing sine function to embody the relations between the modified coefficients K_m,K, which can take the degree of rock mass into account and the integrality coefficient K_v,an improved acquired method of Hock-Brown empirical parameters m,s,i.