Catalytic Enantioselective Synthesis of Axially Chiral Polycyclic Aromatic Hydrocarbons (PAHs) via Regioselective C–C Bond Activation of Biphenylenes
作者:Hideaki Takano、Natsumi Shiozawa、Yoshitane Imai、Kyalo Stephen Kanyiva、Takanori Shibata
DOI:10.1021/jacs.9b12205
日期:2020.3.11
Chiral polycyclicaromatichydrocarbons (PAHs) are expected to have unusual physical properties due to their chirality and extremely expanded π-conjugated system. Indeed, PAHs are expected to be useful as chiral recognizers and organic semiconductors. Therefore, a method for the synthesis of chiral PAHs is strongly desired. Although there are some reports of the enantioselective synthesis of helically
Solvent effect and fluorescence response of the 7-tert-butylpyrene-dipicolylamine linkage for the selective and sensitive response toward Zn(<scp>ii</scp>) and Cd(<scp>ii</scp>) ions
The complexation behaviour of new fluorescent sensors based on 7-tert-butylpyrene towards Zn2+and Cd2+in different solvent systems has been investigated.
A fluorescence “turn-on” sensor for multiple analytes: OAc− and F− triggered fluorogenic detection of Zn2+ in a co-operative fashion
作者:Zannatul Kowser、Ummey Rayhan、Shofiur Rahman、Paris E. Georghiou、Takehiko Yamato
DOI:10.1016/j.tet.2017.07.046
日期:2017.9
proton transfer (ESIPT) mechanism. Ligand L1 undergoes AcO−/F− triggered sharp fluorescence enhancement towards Zn2+ in a co-operative fashion to form a complex with 2:1 stoichiometry. In order to investigate the influence of the 7-tert-butyl group, pyrene-1-azine-salicylaldehyde, L2 was also prepared. With ligand L1, fluorescence enhancement in acetonitrile solution is found to be twice as large than with
Steric effects have attracted great attention in the fields of synthetic chemistry, spectroscopy, crystallography, as well as surface chemistry. Herein, two pyrene-based compounds with different cyclic ketones acting as a bridge are presented and the influence of the steric effects on the luminescent and molecular packing is investigated. Both luminogens display different optical properties both in
Pentacyclic and Hexacyclic Osmaarynes and Their Derivatives
作者:Xiao Fei Yang、Ming‐Xing Zhang、De Bin Fu、Yang Wang、Jun Yin、Sheng Hua Liu
DOI:10.1002/chem.202202334
日期:2022.12.27
The complex world of osmium: The first pentacyclic and hexacyclicosmaaryne have been successfully synthesized. The nucleophilic reaction of osmaarynes was used to obtain the corresponding osmium complexes, which exhibited near-infrared luminescence, aggregation-induced emission (AIE) and photothermal conversion.