Department of Chemistry, South University of Science and Technology of China, Shenzhen, Guangdong, 518055, China.
Angew Chem Int Ed Engl. 2017 Feb 6;56(7):1784-1788. doi: 10.1002/anie.201610762. Epub 2017 Jan 12.
Phosphorescence in fluid solutions at ambient temperature is usually quenched by molecular oxygen via energy transfer, and singlet oxygen is concomitantly sensitized. The long-lived phosphorescence of a series of Au arylethynyl complexes with tunable emission energies in aerated dimethyl sulfoxide (DMSO) solutions can be completely and repeatedly switched on by controlled photoirradiation. A trace amount of DMSO oxidation by the sensitized singlet oxygen is proposed to lead to a depletion of molecular oxygen in the local microenvironment of the Au phosphor in the photoactivation processes. Harnessing the photoactivated phosphorescence and using UV light as a non-contact pen, a writing-erasing-rewriting prototype has been demonstrated with a DMSO gel containing Au arylethynyl complexes.
在环境温度下的流体溶液中，磷光通常通过能量转移被分子氧猝灭，同时敏化单线态氧。一系列具有可调发射能量的金芳基乙炔配合物在有氧二甲亚砜（DMSO）溶液中的长寿命磷光可以通过受控光照射完全且重复地打开。据推测，敏化单线态氧对痕量 DMSO 的氧化导致在光激活过程中金磷光体的局部微环境中分子氧耗尽。利用光激活磷光并用紫外光作为非接触笔，已经在含有金芳基乙炔配合物的 DMSO 凝胶中展示了一个写入-擦除-重写原型。
