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研究了溶剂与电荷转移复合物平衡常数K_(CT)之间的关系,并建立了简略模型,选择N-乙基咔唑作为给体,分别与2,4,7-三硝基芴酮和2,4,5,7-四硝基芴酮作为受体进行复合,得到了两对电荷转移复合物。用VPO法测量了在不同溶剂中复合物的K’_(CT)。发现,K’_(CT)随溶剂偶极矩μs的减小而增大,InK’_(CT)和μ_s~2间存在着良好的线性关系。其关系可表达为InK’_(CT)=In K_(CT)—Bμ_s~2-C或InK’_(CT)=A—Bμ_s~2。
The relationship between the solvent and the equilibrium constant K_ (CT) of the charge-transfer complex was studied and a simple model was established. N-ethylcarbazole (N-ethylcarbazole) was chosen as the donor and reacted with 2,4,7-trinitrofluorenone and 2,4,5,7-tetranitrofluorenone as the acceptor complex, resulting in two pairs of charge transfer complexes. The K ’_ (CT) of the complexes in different solvents was measured by the VPO method. It is found that K ’_ (CT) increases with decreasing μs of solvent dipole moment. There is a good linear relationship between InK’ _ (CT) and μ_s ~ 2. The relationship can be expressed as InK ’_ (CT) = In K_ (CT) -Bμ_s ~ 2-C or InK’ _ (CT) = A-Bμ_s ~ 2.