C60PY/TTF(BEDT-TTF)衍生物的电子结构及二阶非线性光学性质的理论研究

用AM1和INDO/CI方法，计算了系列N-甲基-吡咯烷[3，4]C60四硫富瓦烯（C60PY/TTF）的结构和电子光谱，计算结果和实验结果一致。在正确光谱的基础上，用ZINDO/CI-SOS公式计算了该系列分子的二阶非线性光学系数，分析了其分子轨道成分。结果表明，在未占有轨道电子去主要来自C60的贡献，而最高占有轨道的电子云主要集中在TTF上。     

Theoretical studies on structures and UV-Vis spectra of C_(70)O

Systematic studies on eight isomers of C70O were performed by means of INDO methods It has been indicated that the O atom is mainly added to the C1-C2 or C3-C3 bond and an epoxide feature with C1 symmetry is formed.Based on the optimized geometries,the UV-Vis spectra were calculated.It has been found that the main peaks of C70O resemble those of C70 and the characteristic absorptions beyond 460 nm are produced,which is m agree ment with the experimental results.Theoretical assignments about the absorptions were carried out and the reason for the red-shift of the absorptions was discussed.C70O is probably composed of four isomers according to the calculated results.     

以喹啉衍生物和乙酰丙酮为配体的Ir配合物的结构和光谱性质的理论研究

用密度泛函理论(DFT)B3LYP方法对以喹啉衍生物(C∧N)及乙酰丙酮(acac)为配体的金属Ir(Ⅲ)的三个配合物的电子结构和光谱性质进行了理论研究. 计算结果表明, 当喹啉上的取代基(sub)由苯变为联苯或萘时, 电离能变小, 电子亲和势变大, 尤其是分子3, 可预测其能作为电子传输材料和空穴传输材料. 同时, HOMO和 LUMO之间的能隙变窄, 导致光谱红移. T1态主要为HOMO→LUMO 的跃迁. T1→S0 的磷光发射过程为MLCT和LLCT的混合.