scholarly journals Exploring the charge transfer dynamics of hydrogen bonded crystals of 2-methyl-8-quinolinol and chloranilic acid: synthesis, spectrophotometric, single-crystal, DFT/PCM analysis, antimicrobial, and DNA binding studies

RSC Advances ◽  
2021 ◽  
Vol 11 (63) ◽  
pp. 39994-40010
Author(s):  
Palnati Manojkumar ◽  
Harilal ◽  
Varukolu Mahipal ◽  
Gangadhari Suresh ◽  
Nampally Venkatesh ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Single Crystal ◽  
Electronic Absorption ◽  
Room Temperature ◽  
Acid Synthesis ◽  
Binding Studies ◽  
Chloranilic Acid ◽  
Dna Binding Studies ◽  
Ct Complex ◽  
Charge Transfer Dynamics

The chemistry of the CT complex between donor 2-methyl-8-quinolinol (2 MQ) and acceptor chloranilic acid (CHLA) has been studied by using electronic absorption spectroscopy in acetonitrile, methanol, and ethanol at room temperature.

Spectrophotometric and photocatalytic studies of H-bonded charge transfer complex of oxalic acid with imidazole: single crystal XRD, experimental and DFT/TD-DFT studies

2019 ◽  
Vol 43 (23) ◽  
pp. 9039-9051 ◽  
Author(s):  
Ishaat M. Khan ◽  
Kehkashan Alam ◽  
Mohammad Jane Alam ◽  
Musheer Ahmad
Keyword(s):  
Hydrogen Bonding ◽  
Photocatalytic Activity ◽  
Charge Transfer ◽  
Oxalic Acid ◽  
Single Crystal ◽  
Charge Transfer Complex ◽  
Single Crystal Xrd ◽  
Dft Studies ◽  
Td Dft ◽  
Ct Complex

The photocatalytic activity of a new CT complex was tested. Spectrophotometric studies were performed to understand its formation through N+–H⋯O− hydrogen bonding, and the structure was confirmed by single crystal XRD.

scholarly journals Coupled Charge Transfer Dynamics and Photoluminescence Quenching in Monolayer MoS2 Decorated with WS2 Quantum Dots

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Larionette P. L. Mawlong ◽  
Abhilasha Bora ◽  
P. K. Giri
Keyword(s):  
Quantum Dots ◽  
Charge Transfer ◽  
Room Temperature ◽  
Chemical Vapor ◽  
Kelvin Probe ◽  
Photoluminescence Quenching ◽  
Force Microscopy ◽  
Level Model ◽  
Microscopy Analysis ◽  
Charge Transfer Dynamics

AbstractHerein, we have investigated the tunability of the photoluminescence (PL) of the monolayer MoS2 (1L-MoS2) by decorating it with WS2 quantum dots (WS2 QD). The direct bandgap 1L-MoS2 and WS2 QDs are grown by chemical vapor deposition and liquid exfoliation methods, respectively. The room temperature PL spectrum of bare 1L-MoS2 is systematically quenched with its decoration with WS2 QDs at different concentrations. A decrease in the work function of 1L-MoS2 with the decoration of WS2 QDs was established from the Kelvin probe force microscopy analysis. A detailed quantitative analysis using the four-energy level model involving coupled charge transfer was employed to explain the redshift and the systematic decrease in the intensity of the PL peak in 1L-MoS2/WS2 QD heterostructure. The modulation of the PL in the heterostructure is attributed to the increase in the formation of negative trions through the charge transfer from WS2 QD to the 1L-MoS2 and thus making the 1L-MoS2 heavily n-type doped, with increase in the electron density by ~1.5 × 1013 cm−2. This study establishes the contribution of defects in the coupled charge transfer dynamics in 1L-MoS2, and it lays out a convenient strategy to manipulate the optical and electrical properties of 1L-MoS2 for various optoelectronic applications.

scholarly journals Tailoring ultra-fast charge transfer in MoS2

2020 ◽  
Vol 22 (18) ◽  
pp. 10335-10342 ◽  
Author(s):  
Fredrik O. L. Johansson ◽  
Ute B. Cappel ◽  
Mattis Fondell ◽  
Yuanyuan Han ◽  
Mihaela Gorgoi ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Charge Transfer ◽  
Single Crystal ◽  
Functional Materials ◽  
Fast Charge ◽  
Oxide Composite ◽  
Charge Transfer Dynamics ◽  
Materials Used

Charge transfer dynamics are of importance in functional materials used in devices. This property is morphology dependent in MoS2. Compared to a single crystal it is faster in a nanoparticle sample and even faster for a MoS2 graphene oxide composite.

Copper(II) Complexes with Substituted Thiosemicarbazones of α-Ketoglutaric Acid:  Synthesis, X-ray Structures, DNA Binding Studies, and Nuclease and Biological Activity

2004 ◽  
Vol 43 (22) ◽  
pp. 7170-7179 ◽  
Author(s):  
Monica Baldini ◽  
Marisa Belicchi-Ferrari ◽  
Franco Bisceglie ◽  
Pier Paolo Dall'Aglio ◽  
Giorgio Pelosi ◽  
...  
Keyword(s):  
Biological Activity ◽  
Dna Binding ◽  
Acid Synthesis ◽  
Binding Studies ◽  
X Ray ◽  
Dna Binding Studies

scholarly journals CHARGE-TRANSFER COMPLEXES OF CHLORPHENOXAMINE HYDROCHLORIDE WITH CHLORANILIC ACID, 2,3-DICHLORO-5,6-DICYANO-1,4-BENZOQUINONE AND 7,7,8,8-TETRACYANOQUINODIMETHANE AS π-ACCEPTORS

2019 ◽  
pp. 117-123
Author(s):  
AKRAM M. EL-DIDAMONY ◽  
MOUNIR Z. SAAD ◽  
GEHAD M. RAMADAN
Keyword(s):  
Charge Transfer ◽  
Limit Of Detection ◽  
Standard Free Energy ◽  
Pharmaceutical Preparations ◽  
Molar Absorptivity ◽  
Charge Transfer Complexes ◽  
Reaction Products ◽  
Chloranilic Acid ◽  
Accuracy And Precision ◽  
Ct Complex

Objective: To develop simplified, accurate and precise visible spectrophotometric strategies for the assay of chlorphenoxamine hydrochloride (CPX) in pure drug and in its pharmaceutical preparations. Methods: The described methods depended on the formation of charge-transfer (CT) complexes of intense color between CPX as donor with three π-acceptors, chloranilic acid (CLA), 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ), and 7,7,8,8-tetracyanoquinodimethane (TCNQ) and the colored reaction products were estimated spectrophotometrically at 520 nm, 460 nm and 840 nm for CLA, DDQ, and TCNQ complexes, individually. All the optimum conditions were established. The proposed methods were validated in term of linearity, limit of detection as per the international conference on harmonization guidelines ICH Q2 (R1). Results: The complexes obeyed Beer’s law in the concentration range of 16-144, 6-54 and 4-76 μg/mlwith molar absorptivity at 0.30×104, 0.68×104 and 0.58×104 l/mol/cm for CLA, DDQ, and TCNQ, individually. According to Benesi-Hildebrand plots, the association constants and changes of standard free energy were determined. 1:1 was the ratio of composition of the formed CT-complex. Conclusion: The obtained results revealed that the developed method can be applied successfully for the determination of CPX in drug formulations samples with good accuracy and precision.

Sign in / Sign up

Export Citation Format

Share Document