Introducing a new radical trifluoromethylation reagent

2015 ◽  
Vol 51 (27) ◽  
pp. 5967-5970 ◽  
Author(s):  
Azusa Sato ◽  
Jianlin Han ◽  
Taizo Ono ◽  
Alicja Wzorek ◽  
José Luis Aceña ◽  
...  
Keyword(s):  
Aromatic Molecules ◽  
Perfluoroalkyl Radical

Radical trifluoromethylations of aromatic molecules have been achieved by using a persistent perfluoroalkyl radical as a precursor of the CF3 radical. The process works efficiently in terms of chemical yields to produce mixtures of regioisomeric trifluoromethylated compounds.

Graphene and Graphene Oxide Applications for SERS Sensing and Imaging

2019 ◽  
Vol 26 (38) ◽  
pp. 6878-6895 ◽  
Author(s):  
Anna Jabłońska ◽  
Aleksandra Jaworska ◽  
Mateusz Kasztelan ◽  
Sylwia Berbeć ◽  
Barbara Pałys
Keyword(s):  
Graphene Oxide ◽  
Surface Enhanced Raman Spectroscopy ◽  
Biological Species ◽  
Chemical Mechanism ◽  
Aromatic Molecules ◽  
Sers Enhancement ◽  
Reduced Graphene ◽  
Surface Enhanced Raman ◽  
Active Nanoparticles ◽  
Fluorescence Quencher

: Surface Enhanced Raman Spectroscopy (SERS) has a long history as an ultrasensitive platform for the detection of biological species from small aromatic molecules to complex biological systems as circulating tumor cells. Thanks to unique properties of graphene, the range of SERS applications has largely expanded. Graphene is efficient fluorescence quencher improving quality of Raman spectra. It contributes also to the SERS enhancement factor through the chemical mechanism. In turn, the chemical flexibility of Reduced Graphene Oxide (RGO) enables tunable adsorption of molecules or cells on SERS active surfaces. Graphene oxide composites with SERS active nanoparticles have been also applied for Raman imaging of cells. This review presents a survey of SERS assays employing graphene or RGO emphasizing the improvement of SERS enhancement brought by graphene or RGO. The structure and physical properties of graphene and RGO will be discussed too.

scholarly journals The carbonization of aromatic molecules with three-dimensional structures affords carbon materials with controlled pore sizes at the Ångstrom-level

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Tomoki Ogoshi ◽  
Yuma Sakatsume ◽  
Katsuto Onishi ◽  
Rui Tang ◽  
Kazuma Takahashi ◽  
...  
Keyword(s):  
Porous Carbon ◽  
Carbon Materials ◽  
Carbon Sources ◽  
Three Dimensional ◽  
Chemical Vapor ◽  
Thermal Polymerization ◽  
Sodium Ion Battery ◽  
Pore Sizes ◽  
Aromatic Molecules ◽  
Template Methods

AbstractCarbon materials with controlled pore sizes at the nanometer level have been obtained by template methods, chemical vapor desorption, and extraction of metals from carbides. However, to produce porous carbons with controlled pore sizes at the Ångstrom-level, syntheses that are simple, versatile, and reproducible are desired. Here, we report a synthetic method to prepare porous carbon materials with pore sizes that can be precisely controlled at the Ångstrom-level. Heating first induces thermal polymerization of selected three-dimensional aromatic molecules as the carbon sources, further heating results in extremely high carbonization yields (>86%). The porous carbon obtained from a tetrabiphenylmethane structure has a larger pore size (4.40 Å) than those from a spirobifluorene (4.07 Å) or a tetraphenylmethane precursor (4.05 Å). The porous carbon obtained from tetraphenylmethane is applied as an anode material for sodium-ion battery.

Fluorescence from 3,5-diphenyl-8-CF3-BODIPYs with amino substituents on the phenyl rings: Quenching by aromatic molecules

2021 ◽  
Vol 254 ◽  
pp. 119632
Author(s):  
A.V. Gadomska ◽  
A.V. Nevidimov ◽  
S.A. Tovstun ◽  
O.V. Petrova ◽  
L.N. Sobenina ◽  
...  
Keyword(s):  
Aromatic Molecules ◽  
Phenyl Rings

Self-assembly of curved aromatic molecules in nanoparticles

Carbon ◽  
2021 ◽  
Author(s):  
Kimberly Bowal ◽  
Jacob W. Martin ◽  
Markus Kraft
Keyword(s):  
Self Assembly ◽  
Aromatic Molecules

First-principles study of carbon nanothreads derived from five-membered heterocyclic rings: thiophene, furan and pyrrole

2020 ◽  
Author(s):  
Pedro Guerra Demingos ◽  
Naira Maria Balzaretti ◽  
André Muniz
Keyword(s):  
First Principles ◽  
Membered Ring ◽  
One Dimensional ◽  
Aromatic Molecules ◽  
First Principles Study ◽  
Ring Molecules

Carbon nanothreads are one-dimensional materials obtained by controlled compression of aromatic molecules. Benzene and other six-membered ring molecules are normally used as precursors, but recent experiments have shown that carbon...

Theoretical study of small aromatic molecules adsorbed in pristine and functionalised graphene

2021 ◽  
Vol 27 (6) ◽  
Author(s):  
Mariana Zancan Tonel ◽  
Ivana Zanella ◽  
Solange Binotto Fagan
Keyword(s):  
Theoretical Study ◽  
Aromatic Molecules

Self-assembly and guest-induced disassembly of triply interlocked [2]catenanes

2021 ◽  
Vol 57 (24) ◽  
pp. 3010-3013
Author(s):  
Ying-Ying Zhang ◽  
Feng-Yi Qiu ◽  
Hua-Tian Shi ◽  
Weibin Yu
Keyword(s):  
Self Assembly ◽  
Building Blocks ◽  
Aromatic Molecules

Two triply interlocked [2]catenanes and one simple metallacage were constructed by tuning the widths of the organometallic dinuclear building blocks, and the interlocked architectures were disassembled by large aromatic molecules.

Sign in / Sign up

Export Citation Format

Share Document