A Novel Optical Sensor for Metal Ions Based on Ground-State Intermolecular Charge-Transfer Complexation

1999 ◽  
Vol 1 (11) ◽  
pp. 1697-1699 ◽  
Author(s):  
Sergey P. Gromov ◽  
Evgeny N. Ushakov ◽  
Artem I. Vedernikov ◽  
Natalia A. Lobova ◽  
Michael V. Alfimov ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Metal Ions ◽  
Optical Sensor ◽  
Ground State ◽  
Intermolecular Charge Transfer ◽  
Charge Transfer Complexation

The Complex between Molecular Oxygen and an Organic Molecule: Modeling Optical Transitions to the Intermolecular Charge-Transfer State

2021 ◽  
Author(s):  
Frederik Thorning ◽  
Kris Strunge ◽  
Frank Jensen ◽  
Peter R Ogilby
Keyword(s):  
Charge Transfer ◽  
Molecular Oxygen ◽  
Electronic State ◽  
Ground State ◽  
Organic Molecule ◽  
Charge Transfer State ◽  
Optical Transitions ◽  
Collision Complex ◽  
Intermolecular Charge Transfer ◽  
Transfer State

The collision complex between the ground electronic state of an organic molecule, M, and ground state oxygen, O2(X3Σg-), can absorb light to produce an intermolecular charge transfer (CT) state, often...

Weak intermolecular charge transfer in the ground state of a π-conjugated polymer chain

JETP Letters ◽  
2005 ◽  
Vol 81 (9) ◽  
pp. 467-470 ◽  
Author(s):  
D. Yu. Paraschuk ◽  
S. G. Elizarov ◽  
A. N. Khodarev ◽  
A. N. Shchegolikhin ◽  
S. A. Arnautov ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Polymer Chain ◽  
Ground State ◽  
Conjugated Polymer ◽  
Intermolecular Charge Transfer

Fast ethylamine gas sensing based on intermolecular charge-transfer complexation

2012 ◽  
Vol 23 (4) ◽  
pp. 484-487 ◽  
Author(s):  
Eun Mi Lee ◽  
Seon Young Gwon ◽  
Young A Son ◽  
Sung Hoon Kim
Keyword(s):  
Charge Transfer ◽  
Gas Sensing ◽  
Intermolecular Charge Transfer ◽  
Charge Transfer Complexation

Charge Transfer Complexation Boosts Molecular Conductance Through Fermi Level Pinning

2018 ◽  
Author(s):  
Kun Wang ◽  
Andrea Vezzoli ◽  
Iain Grace ◽  
Maeve McLaughlin ◽  
Richard Nichols ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Single Molecule ◽  
Quantum Interference ◽  
Transmission Function ◽  
Scanning Tunneling ◽  
Charge Transfer Complexes ◽  
Tunneling Microscopy ◽  
Quantum Interference Effect ◽  
Single Molecule Junctions ◽  
Charge Transfer Complexation

We have used scanning tunneling microscopy to create and study single molecule junctions with thioether-terminated oligothiophene molecules. We find that the conductance of these junctions increases upon formation of charge transfer complexes of the molecules with tetracyanoethene, and that the extent of the conductance increase is greater the longer is the oligothiophene, i.e. the lower is the conductance of the uncomplexed molecule in the junction. We use non-equilibrium Green's function transport calculations to explore the reasons for this theoretically, and find that new resonances appear in the transmission function, pinned close to the Fermi energy of the contacts, as a consequence of the charge transfer interaction. This is an example of a room temperature quantum interference effect, which in this case boosts junction conductance in contrast to earlier observations of QI that result in diminished conductance.<br>

Fluorescence Quenching of Aminodiphenylamines with Chloromethanes

2002 ◽  
Vol 67 (8) ◽  
pp. 1154-1164 ◽  
Author(s):  
Nachiappan Radha ◽  
Meenakshisundaram Swaminathan
Keyword(s):  
Charge Transfer ◽  
Fluorescence Quenching ◽  
Ground State ◽  
Rate Constants ◽  
Quenching Mechanism ◽  
Quenching Rate ◽  
Charge Transfer Interaction ◽  
Electronically Excited ◽  
A Charge

The fluorescence quenching of 2-aminodiphenylamine (2ADPA), 4-aminodiphenylamine (4ADPA) and 4,4'-diaminodiphenylamine (DADPA) with tetrachloromethane, chloroform and dichloromethane have been studied in hexane, dioxane, acetonitrile and methanol as solvents. The quenching rate constants for the process have also been obtained by measuring the lifetimes of the fluorophores. The quenching was found to be dynamic in all cases. For 2ADPA and 4ADPA, the quenching rate constants of CCl4 and CHCl3 depend on the viscosity, whereas in the case of CH2Cl2, kq depends on polarity. The quenching rate constants for DADPA with CCl4 are viscosity-dependent but the quenching with CHCl3 and CH2Cl2 depends on the polarity of the solvents. From the results, the quenching mechanism is explained by the formation of a non-emissive complex involving a charge-transfer interaction between the electronically excited fluorophores and ground-state chloromethanes.

Charge Transfer Between CO22+ and Ar or Ne at Collision Energies 3-10 eV

2003 ◽  
Vol 68 (1) ◽  
pp. 178-188 ◽  
Author(s):  
Libor Mrázek ◽  
Ján Žabka ◽  
Zdeněk Dolejšek ◽  
Zdeněk Herman
Keyword(s):  
Charge Transfer ◽  
Excited States ◽  
Ground State ◽  
Scattering Method ◽  
Translational Energy ◽  
Centre Of Mass ◽  
Energy Distributions ◽  
Zener Model ◽  
Beam Scattering ◽  
Product Ions

The beam scattering method was used to investigate non-dissociative single-electron charge transfer between the molecular dication CO22+ and Ar or Ne at several collision energies between 3-10 eV (centre-of-mass, c.m.). Relative translational energy distributions of the product ions showed that in the reaction with Ar the CO2+ product was mainly formed in reactions of the ground state of the dication, CO22+(X3Σg-), leading to the excited states of the product CO2+(A2Πu) and CO2+(B2Σu+). In the reaction with Ne, the largest probability had the process from the reactant dication excited state CO22+(1Σg+) leading to the product ion ground state CO2+(X2Πg). Less probable were processes between the other excited states of the dication CO22+, (1∆g), (1Σu-), (3∆u), also leading to the product ion ground state CO2+(X2Πg). Using the Landau-Zener model of the reaction window, relative populations of the ground and excited states of the dication CO22+ in the reactant beam were roughly estimated as (X3Σg):(1∆g):(1Σg+):(1Σu-):(3∆u) = 1.0:0.6:0.5:0.25:0.25.

Dioxastilbenophanes—synthesis and charge transfer complexation studies

Tetrahedron ◽  
2004 ◽  
Vol 60 (10) ◽  
pp. 2351-2360 ◽  
Author(s):  
Perumal Rajakumar ◽  
Venghatraghavan Murali
Keyword(s):  
Charge Transfer ◽  
Complexation Studies ◽  
Charge Transfer Complexation
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