Amorphous Metal-Free Room-Temperature Phosphorescent Small Molecules with Multicolor Photoluminescence via a Host-Guest and Dual-Emission Strategy,Journal of the American Chemical Society

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Amorphous Metal-Free Room-Temperature Phosphorescent Small Molecules with Multicolor Photoluminescence via a Host-Guest and Dual-Emission Strategy
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2018-01-22 , DOI: 10.1021/jacs.7b12800
Dengfeng Li ₁ , Feifei Lu ₁ , Jie Wang ₁ , Wende Hu ₁ , Xiao-Ming Cao ₁ , Xiang Ma ₁ , He Tian ₁

Affiliation

Metal-free room-temperature phosphorescence (RTP) materials offer unprecedented potentials for photoelectric and biochemical materials due to their unique advantages of long lifetime and low toxicity. However, the achievements of phosphorescence at ambient condition so far have been mainly focused on ordered crystal lattice or on embedding into rigid matrices, where the preparation process might bring out poor repeatability and limited application. In this research, a series of amorphous organic small molecular compounds were developed with efficient RTP emission through conveniently modifying phosphor moieties to β-cyclodextrin (β-CD). The hydrogen bonding between the cyclodextrin derivatives immobilizes the phosphors to suppress the nonradiative relaxation and shields phosphors from quenchers, which enables such molecules to emit efficient RTP emission with decent quantum yields. Furthermore, one such cyclodextrin derivative was utilized to construct a host-guest system incorporating a fluorescent guest molecule, exhibiting excellent RTP-fluorescence dual-emission properties and multicolor emission with a wide range from yellow to purple including white-light emission. This innovative and universal strategy opens up new research paths to construct amorphous metal-free small molecular RTP materials and to design organic white-light-emitting materials using a single supramolecular platform.

中文翻译：

通过主客体和双发射策略具有多色光致发光的无定形无金属室温磷光小分子

无金属室温磷光（RTP）材料由于其长寿命和低毒性的独特优势，为光电和生化材料提供了前所未有的潜力。然而，迄今为止，环境条件下磷光的成就主要集中在有序晶格或嵌入刚性基质上，这些制备过程可能会导致重复性差和应用受限。在这项研究中，通过方便地将磷部分修饰为 β-环糊精 (β-CD)，开发了一系列具有高效 RTP 发射的无定形有机小分子化合物。环糊精衍生物之间的氢键固定荧光粉以抑制非辐射弛豫并保护荧光粉免受猝灭剂的影响，这使此类分子能够以良好的量子产率发出有效的 RTP 发射。此外，一种这样的环糊精衍生物用于构建包含荧光客体分子的主客体系统，表现出优异的 RTP 荧光双发射特性和多色发射，从黄色到紫色，包括白光发射。这种创新和通用的策略开辟了新的研究路径，以构建无金属无金属小分子 RTP 材料，并使用单个超分子平台设计有机白光发光材料。表现出优异的 RTP 荧光双发射特性和多色发射，范围从黄色到紫色，包括白光发射。这种创新和通用的策略开辟了新的研究路径，以构建无金属无金属小分子 RTP 材料，并使用单个超分子平台设计有机白光发光材料。表现出优异的 RTP 荧光双发射特性和多色发射，范围从黄色到紫色，包括白光发射。这种创新和通用的策略开辟了新的研究路径，以构建无金属无金属小分子 RTP 材料，并使用单个超分子平台设计有机白光发光材料。

更新日期：2018-01-22

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