195062-59-0Relevant articles and documents
Naphthalimide-based fluorescent nanoprobes for the detection of saccharides
Qiao, Zichun,Chen, Zhaoyang,Zhang, Shuo,Cui, Zepeng,Xu, Zhuoran,Zhang, Weibing,Qian, Junhong
, p. 16428 - 16435 (2018)
Three kinds of fluorescent nano probes SN-A, SN-B and SN-C, based on the photo-induced electron transfer mechanism, were synthesized for the detection of saccharides, in which small fluorescent probes with 1,8-naphthalimide as the fluorophore and phenylboronic acid as the receptor were covalently bound to SiO2 nanoparticles. The fluorescent nano particles were characterized by TEM, IR, UV-Vis and fluorescence spectra. The results showed that the particle diameter exerted a significant influence on the performance of the nanoprobes; however, the length of the linker affected the spectral response to a much lesser extent. The fluorescence intensity at 530 nm (I530) of SN-B exhibited a good linear relationship with the fructose/sorbitol concentration and was employed in the detection of the fructose content in drinks.
Mononuclear Copper(I) complexes based on phenanthroline derivatives P^N^N^P tetradentate ligands: Syntheses, crystal structure, photochemical properties
Chen, Hao,Xu, Liang-Xuan,Yan, Li-Juan,Liu, Xue-Fen,Xu, Dan-Dan,Yu, Xiao-Cong,Fan, Jin-Xuan,Wu, Qing-An,Luo, Shu-Ping
, (2020)
Two novel heteroleptic Cu(I) complexes with the single tetradentate ligands have been designed and synthesized from phenanthroline. The complexes having one copper structure were fully characterized by NMR, ESI-MS and the single-crystal X-ray structures. Their photoelectric chemical properties were investigated by using cyclic voltammetry, UV/vis and fluorescence spectroscopy. Compared with the classic Cu(P^P)(N^N) complexes, this distorted tetrahedral coordination structure of Cu(P^N^N^P) complexes showed a wider excitation wavelength and a red-shifted about 100 nm emission peak, due to the link function between phenanthroline and phosphorus ligands. Moreover, the copper complex B having the naphthyl link groups displayed high red-emissive photoluminescence quantum efficiency (PLQY), which was up to 3.8%.
Photochemical and electrochemical C-N borylation of arylhydrazines
Du, Linlin,Sun, Li,Zhang, Hua
supporting information, p. 1716 - 1719 (2022/02/21)
The C-N borylation of arylhydrazine hydrochlorides with bis(pinacolato)diboron was achieved under photochemical and electrochemical conditions, respectively. This novel and scalable transformation provides two efficient and mild transition-metal-free synt
Mono-Phosphine Metal-Organic Framework-Supported Cobalt Catalyst for Efficient Borylation Reactions
Akhtar, Naved,Antil, Neha,Balendra,Begum, Wahida,Chauhan, Manav,Gupta, Poorvi,Kumar, Ajay,Malik, Jaideep,Manna, Kuntal,Newar, Rajashree
supporting information, (2022/03/15)
We report a metal-organic framework (MOF) supported monoligated phosphine-cobalt complex, which is an active heterogeneous catalyst for aromatic C?H borylation and alkene hydroboration. The mono(phosphine)-Co catalyst (MOF?P?Co) was prepared by metalation of a porous triarylphosphine-functionalized MOF (MOF?P) with CoCl2 followed by activation with NaEt3BH. The MOF catalyst has a broad substrate scope with excellent functional group tolerance to afford arene- and alkyl-boronate esters in excellent yields and selectivity. MOF?P?Co gave a turnover number (TON) of 30,000 and could be recycled and reused at least 13 times in arene C?H borylation. Importantly, the attempt to prepare the homogeneous control (Ph3P?Co) using triphenylphosphine was unsuccessful due to the facile disproportionation reactions or intermolecular ligand exchanges in the solution. In contrast, the site isolation of the active mono(phosphine)-Co species within the MOF affords the robust and coordinatively unsaturated metal complexes, allowing to explore their catalytic properties and the reaction mechanism.
Recyclable Pd2dba3/XPhos/PEG-2000 System for Efficient Borylation of Aryl Chlorides: Practical Access to Aryl Boronates
Cai, Mingzhong,Huang, Bin,Luo, Chengkai,Xu, Caifeng
, (2021/12/02)
Pd2dba3/XPhos in poly(ethylene glycol) (PEG-2000) is shown to be a highly stable and efficient catalyst for the borylation of aryl chlorides with bis(pinacolato)diboron. The borylation reaction proceeds smoothly at 110 °C, delivering a wide variety of aryl boronates in good to excellent yields with high functional group tolerance. The crude products were easily isolated via simple extraction of the reaction mixture with cyclohexane. Moreover, both expensive Pd2dba3 and XPhos in PEG-2000 system could be readily recycled and reused more than six times without loss of catalytic efficiency.
