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研究了碘鎓盐与胺在基态和激发态的相互作用,观察到它们形成以鎓盐为电子受体和胺为电子给体的基态和激发态电荷转移络合物。测定了二苯基碘鎓盐和三乙胺形成的络合物组成为1:1分子比,其缔合常数和克分子吸收系数分别为2.2×10mol~(-1)和2.8×10~3mol~(-1)·1·cm~(-1)。实验结果表明,随着胺的给电性增加,电荷转移络合物的吸收波长红移,胺的空间体积增大,由于空间障碍,电荷转移络合物的克分子吸收系数下降。
The interaction of iodonium salts with amines at the ground state and excited state was investigated and it was observed that they formed the ground state and the excited state charge-transfer complex with onium salt as electron acceptor and amine as electron donor. The complex formed by diphenyliodonium salt and triethylamine was determined to have a molecular weight ratio of 1: 1 with an association constant and an absorption coefficient of 2.2 × 10 ~ (-1) mol and 2.8 × 10 ~ 3 mol ~ (-1) · 1 · cm -1. Experimental results show that as the chargeability of the amine increases, the absorption wavelength of the charge-transfer complex red-shifts and the space volume of the amine increases. Due to the steric hindrance, the molecular absorption coefficient of the charge-transfer complex decreases.