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

AbstractDimer radical ions of aromatic molecules in which excess charge is localized in a pair of rings have been extensively investigated. While dimer radical cations of aromatics have been previously produced in the condensed phase, the number of molecules that form dimer anions is very limited. In this study, we report the formation of intramolecular dimer radical ions (cations and anions) of diphenyl sulfone derivatives (DPs) by electron beam pulse radiolysis in the liquid phase at room temperature. The density functional theory (DFT) calculations also showed the formation of the dimer radical ions. The torsion barrier of the phenyl ring of DPs was also calculated. It was found that the dimer radical ions show the larger barrier than the neutral state. Finally, stability of the dimer radical anion is dependent on not only the inductive effect of the sulfonyl group but the conjugation involving the d-orbital of the S atom and the phenyl rings.

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1 H NMR investigation of the hetero-association of aromatic molecules in aqueous solution: factors involved in the stabilization of complexes of daunomycin and acridine drugs

Molecular Physics ◽

10.1080/002689700750036971 ◽

2000 ◽

Vol 98 (23) ◽

pp. 1961-1971 ◽

Cited By ~ 1

Author(s):

David B. Davies, Dennis A. Veselkov, Veni

Keyword(s):

Aqueous Solution ◽

H Nmr ◽

Aromatic Molecules

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Graphene and Graphene Oxide Applications for SERS Sensing and Imaging

Current Medicinal Chemistry ◽

10.2174/0929867325666181004152247 ◽

2019 ◽

Vol 26 (38) ◽

pp. 6878-6895 ◽

Cited By ~ 6

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.

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Primary photochemical processes in aromatic molecules. Part 12.—Excited states of benzophenone derivatives

Transactions of the Faraday Society ◽

10.1039/tf9656101664 ◽

1965 ◽

Vol 61 (0) ◽

pp. 1664-1673 ◽

Cited By ~ 163

Author(s):

G. Porter ◽

P. Suppan

Keyword(s):

Excited States ◽

Photochemical Processes ◽

Aromatic Molecules

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

Communications Chemistry ◽

10.1038/s42004-021-00515-0 ◽

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.

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Self-assembly of curved aromatic molecules in nanoparticles

Carbon ◽

10.1016/j.carbon.2021.05.013 ◽

2021 ◽

Author(s):

Kimberly Bowal ◽

Jacob W. Martin ◽

Markus Kraft

Keyword(s):

Self Assembly ◽

Aromatic Molecules

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Synthesis and antioxidant properties of 2-(3-(hydroxyimino)methyl)-1H-indol-1-yl)acetamide derivatives

Future Journal of Pharmaceutical Sciences ◽

10.1186/s43094-020-00090-6 ◽

2020 ◽

Vol 6 (1) ◽

Author(s):

Chandravadivelu Gopi ◽

Magharla Dasaratha Dhanaraju

Keyword(s):

Antioxidant Activity ◽

Condensation Reaction ◽

Antioxidant Properties ◽

Side Chain ◽

Antioxidant Power ◽

H Nmr ◽

Antioxidant Agents ◽

Phenyl Rings ◽

Ferric Reducing Antioxidant Power ◽

Ft Ir

Abstract Background The main aim of this work was to synthesise a novel N-(substituted phenyl)-2-(3-(hydroxyimino) methyl)-1H-indol-1-yl) acetamide derivatives and evaluate their antioxidant activity. These compounds were prepared by a condensation reaction between 1H-indole carbaldehyde oxime and 2-chloro acetamide derivatives. The newly synthesised compound structures were characterised by FT-IR, 1H-NMR, mass spectroscopy and elemental analysis. Furthermore, the above-mentioned compounds were screened for antioxidant activity by using ferric reducing antioxidant power (FRAP) and 1,1-diphenyl-2-picrylhydrazyl (DPPH) methods. Result The antioxidant activity result reveals that most of the compounds were exhibiting considerable activity in both methods and the values are very closer to the standards. Among the synthesised compounds, compound 3j, 3a and 3k were shown remarkable activity at low concentration. Conclusion Compounds 3j, 3a and 3k were shown highest activity among the prepared analogues due to the attachment of halogens connected at the appropriate place in the phenyl ring. Hence, these substituted phenyl rings considered as a perfect side chain for the indole nucleus for the development of the new antioxidant agents.

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

Physical Chemistry Chemical Physics ◽

10.1039/d0cp05847e ◽

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...

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