A fluorogenic and chromogenic dual sensor for the detection of cyanide and copper(ii) in water samples and living cells

2016 ◽  
Vol 8 (38) ◽  
pp. 6909-6915 ◽  
Author(s):  
T. M. Ebaston ◽  
G. Balamurugan ◽  
S. Velmathi
Keyword(s):  
Charge Transfer ◽  
Detection Limit ◽  
Fluorescent Sensor ◽  
Aqueous Media ◽  
Living Cells ◽  
Dual Sensor ◽  
Molecular Charge ◽  
Intra Molecular Charge Transfer ◽  
Good Detection Limit ◽  
Good Detection

Here we describe a simple fluorescent sensor based on intra molecular charge transfer to detect cyanide in aqueous media selectively with a very good detection limit and cascade recognition of aq. copper(ii) ions.

Studying the influence of triplet deactivation on the singlet–triplet inter-conversion in intra-molecular charge-transfer fluorescence-based OLEDs by magneto-electroluminescence

2014 ◽  
Vol 2 (31) ◽  
pp. 6264-6268 ◽  
Author(s):  
Qiming Peng ◽  
Aiwu Li ◽  
Yunxia Fan ◽  
Ping Chen ◽  
Feng Li
Keyword(s):  
Charge Transfer ◽  
Dynamic Process ◽  
Fluorescent Materials ◽  
Molecular Charge ◽  
Intra Molecular Charge Transfer

The singlet–triplet inter-conversion in CT fluorescent materials is a dynamic process, and the deactivation rates of singlet and triplet determine the direction of the conversion.

Flexible and highly fluorescent aromatic polyimide: design, synthesis, properties, and mechanism

2016 ◽  
Vol 4 (44) ◽  
pp. 10509-10517 ◽  
Author(s):  
Zhuxin Zhou ◽  
Yi Zhang ◽  
Siwei Liu ◽  
Zhenguo Chi ◽  
Xudong Chen ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Transfer Effects ◽  
Aromatic Polyimide ◽  
Design Synthesis ◽  
Molecular Charge ◽  
Synthesis Properties ◽  
Intra Molecular Charge Transfer

A flexible and highly fluorescent aromatic polyimide can be obtained by appropriate control of the intra-molecular charge-transfer effects between the diamine and dianhydride moieties.

Theoretical study on photo-induced processes of 1-methyl-3-(N-(1,8-naphthalimidyl)ethyl)imidazolium halide species: an application of constrained density functional theory

2018 ◽  
Vol 20 (6) ◽  
pp. 3911-3917 ◽  
Author(s):  
Takao Otsuka ◽  
Masato Sumita ◽  
Hironori Izawa ◽  
Kenji Morihashi
Keyword(s):  
Density Functional Theory ◽  
Charge Transfer ◽  
Excited States ◽  
Density Functional ◽  
Theoretical Study ◽  
Functional Theory ◽  
Molecular Charge ◽  
Intra Molecular Charge Transfer

Inter-molecular charge transfer (SET) and intra-molecular charge transfer (SM1) excited states are involved in the photo-induced processes of 1-methyl-3-(N-(1,8-naphthalimidyl)ethyl)imidazolium halide.

scholarly journals Intra-molecular Charge Transfer and Electron Delocalization in Non-fullerene Organic Solar Cells

2018 ◽  
Vol 10 (12) ◽  
pp. 10043-10052 ◽  
Author(s):  
Qinghe Wu ◽  
Donglin Zhao ◽  
Matthew B. Goldey ◽  
Alexander S. Filatov ◽  
Valerii Sharapov ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Transfer ◽  
Organic Solar Cells ◽  
Electron Delocalization ◽  
Molecular Charge ◽  
Intra Molecular Charge Transfer

A colorimetric and ratiometric fluorescent probe for the selective detection of cyanide anions in aqueous media and living cells

RSC Advances ◽  
2016 ◽  
Vol 6 (13) ◽  
pp. 10266-10271 ◽  
Author(s):  
Xueyi Sun ◽  
Yu Wang ◽  
Xiahe Deng ◽  
Junfang Zhang ◽  
Zhao Zhang
Keyword(s):  
Charge Transfer ◽  
Fluorescent Probe ◽  
Aqueous Media ◽  
Living Cells ◽  
Sensitive Detection ◽  
Selective Detection ◽  
Cyanide Ion ◽  
Internal Charge Transfer ◽  
Internal Charge ◽  
Ratiometric Fluorescent Probe

Based on the internal charge transfer (ICT) mechanism, a novel colorimetric and ratiometric fluorescent probe was developed for highly selective and sensitive detection of cyanide ion in aqueous media.

scholarly journals Intramolecular Photo-Oxidation as a Potential Source to Probe Biological Electron Damage: A Carboxylated Adenosine Analogue as Case Study

Molecules ◽  
2021 ◽  
Vol 26 (10) ◽  
pp. 2877
Author(s):  
Maria Elena Castellani ◽  
Jan R. R. Verlet
Keyword(s):  
Charge Transfer ◽  
Carboxylic Acid ◽  
Molecular Orbital ◽  
Photoelectron Spectroscopy ◽  
Density Functional ◽  
Adenosine Monophosphate ◽  
Time Resolved ◽  
Starting Point ◽  
Molecular Charge ◽  
Intra Molecular Charge Transfer

A carboxylated adenosine analog (C-Ado−) has been synthesized and probed via time-resolved photoelectron spectroscopy in order to induce intra-molecular charge transfer from the carboxylic acid moiety to the nucleobase. Intra-molecular charge transfer can be exploited as starting point to probe low-energy electron (LEE) damage in DNA and its derivatives. Time-dependent density functional theory (TD-DFT) calculations at the B3LYP-6311G level of theory have been performed to verify that the highest occupied molecular orbital (HOMO) was located on carboxylic acid and that the lowest occupied molecular orbital (LUMO) was on the nucleobase. Hence, the carboxylic acid could work as electron source, whilst the nucleobase could serve the purpose of electron acceptor. The dynamics following excitation at 4.66 eV (266 nm) were probed using time-resolved photoelectron spectroscopy using probes at 1.55 eV (800 nm) and 3.10 eV (400 nm). The data show rapid decay of the excited state population and, based on the similarity of the overall dynamics to deoxy-adenosine monophosphate (dAMP–), it appears that the dominant decay mechanism is internal conversion following 1ππ* excitation of the nucleobase, rather than charge-transfer from the carboxylic acid to the nucleobase.

Synthesis and investigation of intra-molecular charge transfer state properties of novel donor–acceptor–donor pyridine derivatives: the effects of temperature and environment on molecular configurations and the origin of delayed fluorescence

2015 ◽  
Vol 17 (38) ◽  
pp. 25572-25582 ◽  
Author(s):  
Murat Aydemir ◽  
Gülçin Haykır ◽  
Figen Türksoy ◽  
Selçuk Gümüş ◽  
Fernando B. Dias ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Delayed Fluorescence ◽  
Charge Transfer State ◽  
Pyridine Derivatives ◽  
Molecular Charge ◽  
Donor Acceptor ◽  
Effects Of Temperature ◽  
Intra Molecular Charge Transfer ◽  
Transfer State

A novel series of D–A–D pyridine derivatives were synthesised and detailed photo-physical investigations were made at varying temperatures.

scholarly journals The electron charge density distribution in a non linear optical compound

2014 ◽  
Vol 70 (a1) ◽  
pp. C380-C380
Author(s):  
Hamzaoui Fodil ◽  
Chouaih Abdelkader
Keyword(s):  
Charge Transfer ◽  
Density Distribution ◽  
Charge Density ◽  
Electron Charge ◽  
X Ray Diffraction ◽  
Amino Groups ◽  
Charge Density Distribution ◽  
Electron Charge Density ◽  
Molecular Charge ◽  
Intra Molecular Charge Transfer

The 4, 4 dimethyl amino-cyanobiphenyl crystal (DMACB) is characterized by its nonlinear optical properties. The intra molecular charge transfer of this molecule (figure-1) results mainly from the electronic transmission of the electro-acceptor (Cyano) and the electro-donor (Di-Methyl-Amino) groups [1]. An accurate electron charge density distribution around the molecule has been calculated from a high-resolution X-ray diffraction study. The data were collected at 123 K using graphite-monochromated Mo-Kα radiation. The crystal structure has been validated and deposited at the Cambridge Crystallographic Data Centre with the deposition number CCDC 876507. The refinement was carried using the multipolar model of Hansen and Coppens [2]. We have explored systematically the main molecule planes. The different sections show clearly the accumulation of the electron charge density along the chemical bonding. The oxygen lone pairs have been perfectly localized. The charge density function has been used for the calculation of the molecular dipole moment and the electrostatic potential around the molecule [3]. The obtained results show clearly the nature of electron charge transfer in the DMACB compound.

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