【摘要】 本文讨论了单分子膜内J-聚体的性质、稳定性以及影响J-聚体形成的因素。实验中发现,制备有序单分子膜时,机械振动是影响J-聚体形成的重要因素;利用分子的电性质,靠外加电场的作用,可以增加J-聚体的成份。载于玻璃载片上单分子膜中的J-聚体在室温下就可以破坏,在低温下能够得以保存。根据J-聚体的能级性质及其在能量转移中的作用,作者认为,J-聚体可以形成激子态,J-聚体内的能量转移是激子转移。更多还原

【Abstract】 J-aggregates formed from specially packed molecules have the properties of exciton when they are excited. Because of the interaction of molecules, J-aggregates differ from monomer in spectrum and energy transfer. The factors which affect the formation and the stability of J-aggregates in Langmuir-Blodgett films are discussed in this paper.Applying L-B technique, the ordered monolayer has been prepared by mixing N, N’-dio-ctadecyloxacyanine+ (dye I) with hexadecane in molar ratio 1:1. In such monolayer, molecules exist in monomers, dimers, and J-aggregates. In order to increase the composition of J-aggre-gare, the weakened plain stage is used and an electric field is imposed on the dye molecules during the preparing of the monolayer. Some good results were achieved.J-aggregates thus formed and deposited on the glass substrate are not very stable. Thermo-motion of molecules is the main cause of damaging J-aggregates. The life of J-aggregates can be prolonged as you like by keeping the glass substrate with the monolayer in N3 liquid (77 K).更多还原