Impact of C–H···X (X = F, N) and π–π Interactions on Tuning the Degree of Charge Transfer in F6TNAP-Based Organic Binary Compound Single Crystals

2018 ◽  
Vol 18 (3) ◽  
pp. 1776-1785 ◽  
Author(s):  
Peng Hu ◽  
Shancheng Wang ◽  
Apoorva Chaturvedi ◽  
Fengxia Wei ◽  
Xiaoting Zhu ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Single Crystals ◽  
Binary Compound ◽  
Π Interactions ◽  
Degree Of Charge Transfer

scholarly journals Synthesis and Photobehavior of a NewDehydrobenzoannulene-Based HOF with Fluorine Atoms: From Solution to Single Crystals Observation

2021 ◽  
Vol 22 (9) ◽  
pp. 4803
Author(s):  
Eduardo Gomez ◽  
Ichiro Hisaki ◽  
Abderrazzak Douhal
Keyword(s):  
Charge Transfer ◽  
Single Crystals ◽  
Parent Compound ◽  
Time Resolved ◽  
Strong Basis ◽  
Triplet Structure ◽  
Carboxylic Groups ◽  
Potential Applications ◽  
A Charge ◽  
Further Development

Hydrogen-bonded organic frameworks (HOFs) are the focus of intense scientific research due their potential applications in science and technology. Here, we report on the synthesis, characterization, and photobehavior of a new HOF (T12F-1(124TCB)) based on a dehydrobenzoannulene derivative containing fluorine atoms (T12F-COOH). This HOF exhibits a 2D porous sheet, which is hexagonally networked via H-bonds between the carboxylic groups, and has an interlayers distance (4.3 Å) that is longer than that of a typical π–π interaction. The presence of the fluorine atoms in the DBA molecular units largely increases the emission quantum yield in DMF (0.33, T12F-COOH) when compared to the parent compound (0.02, T12-COOH). The time-resolved dynamics of T12F-COOH in DMF is governed by the emission from a locally excited state (S1, ~ 0.4 ns), a charge-transfer state (S1(CT), ~ 2 ns), and a room temperature emissive triplet state (T1, ~ 20 ns), in addition to a non-emissive triplet structure with a charge-transfer character (T1(CT), τ = 0.75 µs). We also report on the results using T12F-ester. Interestingly, FLIM experiments on single crystals unravel that the emission lifetimes of the crystalline HOF are almost twice those of the amorphous ones or the solid T12F-ester sample. This shows the relevance of the H-bonds in the photodynamics of the HOF and provides a strong basis for further development and study of HOFs based on DBAs for potential applications in photonics.

Growth direction dependent separate-channel charge transport in organic weak charge-transfer co-crystal of anthracene-DTTCNQ

2022 ◽  
Author(s):  
Hui Jiang ◽  
Jun Ye ◽  
Peng Hu ◽  
Shengli Zhu ◽  
Yanqin Liang ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Charge Transport ◽  
Electronic Properties ◽  
Single Crystals ◽  
Organic Semiconductors ◽  
Crystal Engineering ◽  
Molecular Crystal ◽  
Growth Direction ◽  
Weak Charge ◽  
Separate Channel

Co-crystallization is an efficient way of molecular crystal engineering to tune the electronic properties of organic semiconductors. In this work, we synthesized anthracene-4,8-bis(dicyanomethylene)4,8-dihydrobenzo[1,2-b:4,5-b’]-dithiophene (DTTCNQ) single crystals as a template to...

Crystal growth and characterization of solvated organic charge-transfer complexes built on TTF and 9-dicyanomethylenefluorene derivatives

CrystEngComm ◽  
2015 ◽  
Vol 17 (32) ◽  
pp. 6227-6235 ◽  
Author(s):  
Amparo Salmerón-Valverde ◽  
Sylvain Bernès
Keyword(s):  
Charge Transfer ◽  
Crystal Growth ◽  
Charge Transfer Complexes ◽  
Organic Complexes ◽  
Donor Acceptor ◽  
Degree Of Charge Transfer

A series of solvated donor–acceptor organic complexes were shown to slowly release the lattice solvent while the degree of charge transfer decreases steadily. This behavior is not observed in the case of a hydrate.

Model-independent determination of the degree of charge transfer in molecular and metal complexes

2015 ◽  
Vol 51 (81) ◽  
pp. 15071-15074 ◽  
Author(s):  
Bora Joo ◽  
Eung-Gun Kim
Keyword(s):  
Charge Transfer ◽  
Metal Complexes ◽  
Active Space ◽  
Model Free ◽  
Independent Determination ◽  
Charge Analysis ◽  
Model Independent ◽  
Degree Of Charge Transfer

Choosing a small active space of electrons for charge analysis allows the model-free determination of the degree of charge transfer.

Optical Spectroscopy of Mixed Metamagnetic FexCo1-xCl2 Crystals

1980 ◽  
Vol 35 (10) ◽  
pp. 1013-1019 ◽  
Author(s):  
Friedrich Seitz ◽  
Terence E. Wood ◽  
Peter Day
Keyword(s):  
Charge Transfer ◽  
Temperature Dependence ◽  
Single Crystals ◽  
Absorption Spectra ◽  
Optical Spectroscopy ◽  
Electronic Absorption ◽  
Electronic Absorption Spectra ◽  
Broad Band ◽  
Mixed Crystals ◽  
Magnetic Exchange

Abstract Electronic absorption spectra are reported for single crystals of composition FexCo1-xCl2 as a function of temperature from 300 K to 4 K. A broad band at 436 nm is assigned to Fe (II) → Co (II) charge transfer and the temperature dependence of its intensity is related to the magnetic exchange between the ions. The 2T1g(2H) excitation of Co (II) in the mixed crystals has an unusual temperature dependence which correlates with the Néel temperature.

An enhanced degree of charge transfer in dye-sensitized solar cells with a ZnO-TiO2/N3/Ag structure as revealed by surface-enhanced Raman scattering

Nanoscale ◽  
2017 ◽  
Vol 9 (40) ◽  
pp. 15303-15313 ◽  
Author(s):  
Xiaolei Wang ◽  
Peng Li ◽  
Xiao Xia Han ◽  
Yasutaka Kitahama ◽  
Bing Zhao ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Synergistic Effect ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Sensitized Solar Cells ◽  
Degree Of Charge Transfer ◽  
Sers Intensity

The synergistic effect in ZnO-TiO2/N3/Ag can generate extra enhancements in the SERS intensity and degree of CT.

scholarly journals Organic single crystals of cyano-substituted p-phenylene vinylene derivatives as transistors with low surface trap density

2020 ◽  
Vol 56 (89) ◽  
pp. 13776-13779
Author(s):  
Jian Deng ◽  
Yuejuan Wan ◽  
Chang Cai ◽  
Cheng Gu ◽  
Yuguang Ma
Keyword(s):  
Hydrogen Bonds ◽  
Single Crystals ◽  
Defect Density ◽  
Trap Density ◽  
Phenylene Vinylene ◽  
Intermolecular Hydrogen Bonds ◽  
Surface Trap ◽  
Π Interactions

Cyano-substituted oligo(p-phenylene vinylene) derivatives with π–π interactions and intermolecular hydrogen bonds in orthogonal directions were synthesised, and demonstrated very low defect density by OFETs.

Raman study on quenched YBa2Cu3O7−σ single crystals: Evidence of charge transfer during oxygen ordering on room temperature annealing

1991 ◽  
Vol 185-189 ◽  
pp. 827-828 ◽  
Author(s):  
Kiyoto Matsuishi ◽  
Yuan-Kai Tao ◽  
Hung-Su Feng ◽  
Pei-Herng Hor ◽  
Ching-Wu Chu
Keyword(s):  
Charge Transfer ◽  
Single Crystals ◽  
Room Temperature ◽  
Oxygen Ordering ◽  
Raman Study
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