Artificial Light‐Harvesting Systems Based on AIEgen‐branched Rotaxane Dendrimers for Efficient Photocatalysis
作者:Wei‐Jian Li、Xu‐Qing Wang、Dan‐Yang Zhang、Yi‐Xiong Hu、Wei‐Tao Xu、Lin Xu、Wei Wang、Hai‐Bo Yang
DOI:10.1002/anie.202106035
日期:2021.8.16
harvesting, the precise synthesis of a new family of AIEgen-branched rotaxane dendrimers was successful realized from an AIEgen-functionalized [2]rotaxane through a controllable divergent approach. In the resultant AIE macromolecules, up to twenty-one AIEgens located at the tails of each branches, thus making them the first successful example of AIEgen-branched dendrimers. Attributed to the solvent-induced
AIE-active tetraphenylethene functionalized metal–organic framework for selective detection of nitroaromatic explosives and organic photocatalysis
作者:Qiu-Yan Li、Zheng Ma、Wen-Qiang Zhang、Jia-Long Xu、Wei Wei、Han Lu、Xinsheng Zhao、Xiao-Jun Wang
DOI:10.1039/c6cc04997d
日期:——
A luminescent MOF containing an AIE-active TPE moiety works as a selective sensor for detecting nitroaromatic explosives, as well as an efficient heterogeneous photocatalyst for CDC reactions mediated by visible light.
An elegant cascade cross‐coupling and in situ hydrogenation reaction has been established by visiblelightcatalysis. Combining cheap and earth‐abundant eosin Y as a photosensitizer and the cobalt chloride complex, Co(dmgH)2Cl2 (dmgH=dimethylglyoximate), as a catalyst, the desired oxidative cross‐coupling products and reductive hydrogenation products could be achieved in good to excellent yields without
paramagnetic resonance) experiment provides direct evidence on the generation of superoxide radical anion (O2−.) rather than singlet oxygen (1O2) under irradiation of the reaction system, in contrast to that reported in the literature. Combined, the photoinduced electron‐transfer and subsequent formation of superoxide radical anion (O2−.) results in a clean and facile transformation.
Cross-dehydrogenative-coupling reaction has long been recognized as a powerful tool to form a C-C bond directly from two different C-H bonds. Most current processes are performed by making use of stoichiometric amounts of oxidizing agents. We describe here a new type of reaction, namely cross-coupling hydrogen evolution (CCHE), with no use of any sacrificial oxidants, and only hydrogen (H2) is generated
交叉脱氢偶联反应长期以来被认为是直接由两个不同的 CH 键形成 CC 键的有力工具。大多数当前方法是通过使用化学计量量的氧化剂进行的。我们在此描述了一种新型反应,即交叉偶联析氢 (CCHE),不使用任何牺牲氧化剂,仅产生氢气 (H2) 作为副产物。通过将曙红 Y 和石墨烯负载的 RuO2 纳米复合材料 (G-RuO2) 结合作为光敏剂和催化剂,在室温可见光照射下以定量产率获得所需的交叉偶联产物和 H2。