A generic and effective strategy for highly effective “intrinsic” molecular luminescence in the condensed state
A generic and effective strategy for highly effective “intrinsic” molecular luminescence in the condensed state
复制标题
DOI：
10.1039/c3tc30597j
复制
发表时间：
2013-08
影响因子：
6.4
通讯作者：
Y. Zhu;Shanyi Guang;Hongyao Xu;Xinyan Su;Xiang‐Yang Liu
中科院分区：
文献类型：
--
作者：
Y. Zhu;Shanyi Guang;Hongyao Xu;Xinyan Su;Xiang‐Yang Liu
通过宏观结构水平的理论模拟，提出了一种实现凝聚态高效“本征”单分子发光的通用策略，并通过哑铃型（H2）和蝌蚪型（H1）多面体低聚倍半硅氧烷（POSS）杂化材料的分子设计和制备得到了验证.从理论和实验上探讨了其光学性能增强的机理。研究发现，通过在有机发光分子中引入纳米尺度的“巨大”无机POSS核，形成三维有机-无机杂化物，由于阻碍了相邻有机分子之间的电荷转移，降低了分子间的偶极-偶极和π-π堆积相互作用，从而有效地改善了凝聚态物质的光学性质。哑铃型杂化物（H2）由于POSS的引入使其二聚体呈十字形排列，比蝌蚪型杂化物（H1）具有更好的光学性能增强效果，同时两种杂化物均具有较高的热稳定性和良好的成膜能力。
A generic and efficient strategy to realize a high effective “intrinsic” single molecular luminescence in the condensed state was proposed by theoretical simulation at the macrostructure level at first, and then was confirmed by molecular design and preparation of a dumbbell-type (H2) and tadpole-type (H1) polyhedral oligomeric silsesquioxane (POSS) based hybrid. The enhancement mechanism of the optical properties was investigated in theory and with experiments. It was found that the incorporation of a “huge” inorganic POSS core on the nanoscale into the organic light-emitting molecules to form three-dimensional (3D) organic–inorganic hybrids effectively improved the optical properties in the condensed matter by decreasing the intermolecular dipole–dipole and π–π stacking interactions owing to the hindrance of the intermolecular charge-transfer between adjacent organic molecules. The dumbbell-type hybrid (H2) showed a better enhancement effect of the optical properties than the resultant tadpole-type hybrid (H1) owing to the crisscross-type arrangement of its dimer induced by the incorporation of POSS. Simultaneously, the two hybrids exhibited high thermal stability and good film forming ability.