Connecting a carbonyl and a π-conjugated group through a <i>p</i>-phenylene linker by (5+1) benzene ring formation
作者:Tatsuya Morofuji、Hanae Kinoshita、Naokazu Kano
DOI:10.1039/c9cc04012a
日期:——
A benzene ring was formed to connect a carbonyl group of various methyl ketones with a π-conjugated group through a p-phenylene linker. Methyl ketones and streptocyanines were used as the C1 and C5 sources, respectively, in the (5+1) annulation, which could form donor–π–acceptor molecules.
2-aminophenyl ketones (3a–3g) in the presence of catalytic sulfuric acid and characterized well. They are thermally robust with high glass transition temperatures (above 176.4 °C) and decomposition temperatures (above 406 °C). These compounds emit blue fluorescence with λEmmax ranging from 433 to 446 nm in dilute toluene solution and 461 to 502 nm in the solid-state and have a relatively high efficiency
Visible‐light‐driven hydrogen production coupled with selective organic oxidation has attracted increasing attention, as it not only provides clean and renewable energy, but also utilizes the other half reaction to achieve some value‐added organic chemicals. Metal‐organicframeworksbased on metalclusters and organic ligands self‐assembly give a perspective on the formation of multifunctional heterogeneous
Enantiomeric silver‐based MOFs were obtained through a homochiralcrystallization of cinchonine and cinchonidine enantiomers as chiral adducts with silver. These MOFs exhibited excellent catalytic activity for asymmetric [3+2] cycloaddition (see scheme), giving products with high enantioselectivity.
A Highly Luminescent Chiral Tetrahedral Eu<sub>4</sub>L<sub>4</sub>(L′)<sub>4</sub> Cage: Chirality Induction, Chirality Memory, and Circularly Polarized Luminescence
作者:Yanyan Zhou、Hongfeng Li、Tianyu Zhu、Ting Gao、Pengfei Yan
DOI:10.1021/jacs.9b07178
日期:2019.12.18
lanthanide cages with circularly polarized luminescence (CPL) properties have found potential application in enantiose-lective guest recognition and sensing. However, it still remains a big challenge to develop simple and robust method for the diastereoselective assembly of homochiral lanthanide cage in view of the large lability of the Ln(III) ions. Herein, we report the first example of the formation of