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通过乙基桥把供电子基团1,8-萘酰亚胺与罗丹明底环羧酸基相连,得到了两种以D-l-A(Donor-Acceptor-Line alkanes compounds)分子修饰罗丹明底环的化合物,并就合成中间体D-π-A(Donor-Acceptor-π-conjugated compounds)分子中哌嗪供电子基取代溴对1,8-萘酐母体基态和激发态的影响,以及对D-l-A分子修饰罗丹明底环对罗丹明母体D-π-A分子紫外可见吸收光谱和激发态的影响进行了研究。结果表明:用D-l-A分子修饰罗丹明底环时,D(Donor compound)的给电子能力越强,其吸收强度越大,其吸收紫外光而激发能力越强;在激发态下D-l-A体系发生了分子内能量传递,萘酰亚胺基团发生强烈的荧光猝灭,罗丹明底环接收能量激发罗丹明母体(D-π-A分子)发射特征荧光,D的给电子能力越强,其荧光强度越高。
Two electron donor groups, 1,8-naphthalimide and rhodamine endocyclic carboxylic acid group were connected by ethyl bridge to obtain two compounds modified with DlA (Donor-Acceptor-Line alkanes compounds) , And the influence of substituted bromine on the ground state and excited state of 1,8-naphthalene anhydride in the D-π-A (D-π-A) The effect of rhodamine bottom ring on UV-Vis absorption spectra and excited states of D-π-A molecule in rhodamine was studied. The results showed that when DlA molecules modified Rhodamine bottom ring, Donor compound had stronger electron-donating ability and higher absorption intensity, which led to its stronger ability to absorb ultraviolet light. In the excited state, molecules of DlA system The fluorescence of D-π-A molecule is excited by the energy absorption of the rhodamine bottom ring, and the stronger the electron donating ability of D, the fluorescence intensity of D The higher.