3393-77-9Relevant articles and documents
Proton-Activated “Off–On” Room-Temperature Phosphorescence from Purely Organic Thioethers
Huang, Linkun,Chen, Biao,Zhang, Xuepeng,Trindle, Carl O.,Liao, Fan,Wang, Yucai,Miao, Hui,Luo, Yi,Zhang, Guoqing
, p. 16046 - 16050 (2018)
Room-temperature phosphorescence (RTP)-based sensors have distinctive advantages over the fluorescence counterparts, such as larger Stokes shifts and longer lifetimes. Unfortunately, almost all RTP sensors are operated on quenching-based mechanisms given the sensitive nature of the emissive triplet state. Here we report a type of thioether RTP molecules that shows RTP “turn-on” when volatile acid vapors such as HCl are in contact. To elucidate the underlying mechanism, model thioethers containing different donor/acceptor combinations are investigated via fluorescence spectroscopy and theoretical calculations aided by molecular coordinates obtained from single-crystal X-ray diffraction. It is revealed that a charge-transfer character in the phosphorescence state is crucial. The “turn-on” design concept may significantly broaden the sensing application scope for organic RTP molecules.
Palladium-catalysed thioetherification of aryl and alkenyl iodides using 1,3,5-trithiane as sulfur source
Kollár, László,Pongrácz, Péter,Rajat Rao, Yalamarti Venkat,Zugó, Alexandra
, (2021/12/17)
Thioetherification reaction of aryl iodides catalysed by palladium(II) complexes in the presence of 1,3,5-trithiane as sulphur source is reported. The paper presents the first homogeneous catalytic application of 1,3,5-trithiane in synthesis. Detailed optimization steps, the frames of the novel reaction are described, as well as the limitations and the substrate scope are also demonstrated. Moderate to good thioether yields were achieved in the presence of various substituted iodobenzenes and some alkenyl iodides, using palladium-xantphos catalyst system. Competitive reactions in the presence of mixed substrates were also performed and mechanistic considerations were assumed.
A Visible-Light-Harvesting Covalent Organic Framework Bearing Single Nickel Sites as a Highly Efficient Sulfur–Carbon Cross-Coupling Dual Catalyst
Chen, Hui,Liu, Wanlu,Laemont, Andreas,Krishnaraj, Chidharth,Feng, Xiao,Rohman, Fadli,Meledina, Maria,Zhang, Qiqi,Van Deun, Rik,Leus, Karen,Van Der Voort, Pascal
supporting information, p. 10820 - 10827 (2021/04/09)
Covalent Organic Frameworks (COFs) have recently emerged as light-harvesting devices, as well as elegant heterogeneous catalysts. The combination of these two properties into a dual catalyst has not yet been explored. We report a new photosensitive triazine-based COF, decorated with single Ni sites to form a dual catalyst. This crystalline and highly porous catalyst shows excellent catalytic performance in the visible-light-driven catalytic sulfur–carbon cross-coupling reaction. Incorporation of single transition metal sites in a photosensitive COF scaffold with two-component synergistic catalyst in organic transformation is demonstrated for the first time.
