scholarly journals 3-Methylpiperidinyl Carbodithioates as Building Blocks for 1,3-Dithiolium Derivatives

2013 ◽  
Vol 21 (1) ◽  
pp. 47-56
Author(s):  
Laura G. Sarbu ◽  
Lucian G. Bahrin
Keyword(s):  
Charge Transfer ◽  
Sulfuric Acid ◽  
Absorption Band ◽  
Perchloric Acid ◽  
Building Blocks ◽  
Charge Transfer Absorption Band ◽  
Internal Charge Transfer ◽  
Internal Charge

Abstract New 1,3-dithiolium derivatives have been synthesized by heterocyclocondensation of various 3-methylpiperidinyl carbodithioates derived from 2-hydroxypropiophenones. Thus, 1,3-dithiolium perchlorates have been obtained by the treatment of the corresponding dithiocarbamates with a mixture of acetic and sulfuric acid, followed by the addition of perchloric acid. 1,3-Dithiolium perchlorates have been converted to the corresponding 2-(1,3-dithiolium) phenolates under weak basic conditions. These phenolates exhibit mesoionic character with an internal charge transfer absorption band.

Solvatochromic study of internal charge transfer in 7,7-disubstituted quinone methides

1983 ◽  
Vol 48 (8) ◽  
pp. 2376-2385 ◽  
Author(s):  
Libuše Pavlíčková ◽  
Bohumír Koutek ◽  
Václav Jehlička ◽  
Milan Souček
Keyword(s):  
Charge Transfer ◽  
Absorption Band ◽  
Transition Energy ◽  
Intramolecular Charge Transfer ◽  
Quinone Methides ◽  
Long Wavelength ◽  
Wavelength Absorption ◽  
Internal Charge Transfer ◽  
Long Wavelength Absorption Band ◽  
Internal Charge

Electronic spectra of 7,7-disubstituted quinone methides I-III with substituents of various electronegativities were measured in thirteen solvents. Character of the long-wavelength transition was investigated by correlation between transition energy and ionization potential of the donor part of the molecule as well as by comparison of transition moment with Δμ. The long wavelength absorption band of Ia-Id, IIa and IV does not correspond to a pure (π-π*) transition, but it is perturbed by intramolecular charge transfer.

A benzothiazole-based fluorescence turn-on sensor for copper(II)

2021 ◽  
Author(s):  
Gyeongjin Kim ◽  
Donghwan Choi ◽  
Cheal Kim
Keyword(s):  
Charge Transfer ◽  
Limit Of Detection ◽  
Theoretical Calculations ◽  
Enhanced Fluorescence ◽  
Turn On ◽  
Fluorescent Response ◽  
Chelation Enhanced Fluorescence ◽  
Fluorescence Turn On ◽  
Internal Charge Transfer ◽  
Internal Charge

Abstract A new benzothiazole-based chemosensor BTN (1-((Z)-(((E)-3-methylbenzo[d]thiazol-2(3H)-ylidene)hydrazono)methyl)naphthalen-2-ol) was synthesized for the detection of Cu2+. BTN could detect Cu2+ with “off-on” fluorescent response from colorless to yellow irrespective of presence of other cations. Limit of detection for Cu2+ was determined to be 3.3 µM. Binding ratio of BTN and Cu2+ turned out to be a 1:1 with the analysis of Job plot and ESI-MS. Sensing feature of Cu2+ by BTN was explained with theoretical calculations, which might be owing to internal charge transfer and chelation-enhanced fluorescence processes.

A molecular tailoring approach – a new guide to quantify the energy of push–pull effects: a case study on (E)-3-(1H-pyrrol-2-yl)prop-2-enones

2020 ◽  
Vol 22 (39) ◽  
pp. 22190-22194
Author(s):  
Andrei V. Afonin ◽  
Danuta Rusinska-Roszak
Keyword(s):  
Charge Transfer ◽  
New Approach ◽  
Internal Charge Transfer ◽  
Internal Charge ◽  
Molecular Tailoring

We report a new approach to quantify the push–pull effect in molecules with internal charge transfer.

Structural modulation of internal charge transfer in small molecular donors for organic solar cells

2012 ◽  
Vol 48 (71) ◽  
pp. 8907 ◽  
Author(s):  
Antoine Leliège ◽  
Charles-Henri Le Régent ◽  
Magali Allain ◽  
Philippe Blanchard ◽  
Jean Roncali
Keyword(s):  
Solar Cells ◽  
Charge Transfer ◽  
Organic Solar Cells ◽  
Structural Modulation ◽  
Internal Charge Transfer ◽  
Internal Charge
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