双(萘-类硫脲盐)化合物的光化学反应

The Photochemical Reaction of Bis(Naphthalene-Thiouronium Salts) Compound

合成了一种带芳基的硫脲盐类化合物,对其在光照下的光化学和光物理行为进行了较详细的研究.发现该化合物在光照下,能通过光诱导的分子内电子转移,产生离子自由基和自由基,继而有可能经自由基的重合反应形成环状化合物,并引起所含芳基基团处于合适的易于出现很强激基缔合物的位置.为进一步搞清上述反应机制,工作中设计了相应的实验,包括:ESR的测定、加入稳定的氮氧自由基化合物以及加入β CD来阻抑重合反应的进行等,以证明上述的看法.

A kind of bis(naphthalene-thiouronium salt) is synthesized.The photo-chemical and physical behaviors of this compound were studied carefully.Under photo-irradiation compound exhibits unusual excimer emission in fluorescence spectrum.It is probable due to the intra-molecular photo-induced electron transfer occurred,and followed by radical formation,recombination reaction of radicals and cyclic compound formation.In this case the naphthalene groups contained will be arranged in an optimized condition for the excimer formation.In order to clarify the mechanism discussed above several methods such as the ESR measurement,the stable radical(such as TEMPO) and β-CD addition were designed and carried out for inhibition of the radical recombination reaction occurred.