Highly twisted biphenyl-linked carbazole–benzimidazole hybrid bipolar host materials for efficient PhOLEDs

2014 ◽  
Vol 2 (40) ◽  
pp. 8554-8563 ◽  
Author(s):  
Shuo-Hsien Cheng ◽  
Wen-Yi Hung ◽  
Ming-Hung Cheng ◽  
Hsiao-Fan Chen ◽  
Atul Chaskar ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Host Materials ◽  
Degree Of Charge Transfer

Three highly twisted bipolar molecules with different degree of charge transfer characters are developed to serve as PhOLEDs host materials.

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.

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.

Lone pair-π interaction-induced generation of photochromic coordination networks with photoswitchable conductance

2017 ◽  
Vol 53 (70) ◽  
pp. 9701-9704 ◽  
Author(s):  
Jian-Zhen Liao ◽  
Jian-Fei Chang ◽  
Lingyi Meng ◽  
Hai-Long Zhang ◽  
Sa-Sa Wang ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Lone Pair ◽  
Coordination Networks ◽  
Coordination Network ◽  
Induced Variation ◽  
Degree Of Charge Transfer

Lone pair-π interaction-induced variation of the degree of charge-transfer was successfully used for switching the conductance of a photochromic coordination network.

The degree of charge-transfer in the ground-states of molecular π-complexes

1968 ◽  
Vol 0 (0) ◽  
pp. 1297-1302 ◽  
Author(s):  
R. J. W. Le Fèvre ◽  
D. V. Radford ◽  
P. J. Stiles
Keyword(s):  
Charge Transfer ◽  
Ground States ◽  
Degree Of Charge Transfer

Structure and degree of charge transfer of two polymorphs of a 1:1 molecular complex: [2,2′-bis-1,3-dithiole][9-dicyanomethylene-4,5,7-trinitrofluorene-2-carboxylic acid methyl ester] (TTF-MeDC2TNF)

2003 ◽  
Vol 59 (4) ◽  
pp. 505-511 ◽  
Author(s):  
Amparo Salmerón-Valverde ◽  
Sylvain Bernès ◽  
Juan Gerardo Robles-Martínez
Keyword(s):  
Charge Transfer ◽  
Carboxylic Acid ◽  
Methyl Ester ◽  
Acid Methyl Ester ◽  
Structural Features ◽  
Space Group ◽  
Acid Methyl ◽  
Organic Complexes ◽  
Crystal Packings ◽  
Degree Of Charge Transfer

A new organic charge-transfer complex, C18H7N5O8·C6H4S4, has been prepared using TTF (tetrathiafulvalene) as a donor (D) and MeDC2TNF (9-dicyanomethylene-4,5,7-trinitro-fluorene-2-carboxylic acid methyl ester) as an acceptor (A). Two monoclinic polymorphs of the 1:1 salt were crystallized and characterized by X-ray diffraction. Form α crystallizes in space group P21/n with Z′ = 1, while form β crystallizes in space group C2/c with Z′ = 1\over 2 and the MeDC2TNF moiety disordered across a twofold axis. Both phases have mixed-stack crystal packings, which are characteristic of semiconducting one-dimensional organic complexes. However, the observed crystal packings are significantly different, with a single D...A interlayer separation of 3.452 Å for the disordered β polymorph and interlayer separations of 3.378 and 3.483 Å in the case of the ordered α form. These variations are reflected in the degree of charge transfer, δ, which was estimated on the basis of the b 2u stretching-mode frequency shift observed in the IR spectra for the cyano groups of the MeDC2TNF radical anion. The fact that the charge transfer is more efficient for α-(TTF-MeDC2TNF) than for β-(TTF-MeDC2TNF) (δ = 0.35 and 0.31, respectively) is consistent with the structural features observed for each crystalline form.

scholarly journals Efficient electroluminescent hybridized local and charge-transfer host materials with small singlet–triplet splitting to enhance exciton utilization efficiency: excited state transition configuration

RSC Advances ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 6658-6680
Author(s):  
Jayaraman Jayabharathi ◽  
Venugopal Thanikachalam ◽  
Ganapathy Abirama Sundari
Keyword(s):  
Excited State ◽  
Charge Transfer ◽  
State Transition ◽  
Utilization Efficiency ◽  
Triplet Splitting ◽  
Host Materials

CDDPI:Ir(ppy)3 exhibits higher efficiencies: L = 8812 cd m−2; ηex = 19.0%; ηc = 27.5 cd A−1; ηp = 33.0 lm W−1 at 2.7 V.

The synthesis, structure, and electrochemical properties of Fe(C≡CC≡N)(dppe)Cp and related compounds

2006 ◽  
Vol 84 (2) ◽  
pp. 154-163 ◽  
Author(s):  
Mark E Smith ◽  
Richard L Cordiner ◽  
David Albesa-Jové ◽  
Dmitri S Yufit ◽  
František Hartl ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Charge Transfer ◽  
Electrochemical Properties ◽  
Key Words ◽  
Ground State ◽  
Structural Data ◽  
Sequential Reaction ◽  
Heterobimetallic Complexes ◽  
Related Compounds ◽  
Degree Of Charge Transfer

The cyanoacetylide complex Fe(C≡CC≡N)(dppe)Cp (3) is readily obtained from sequential reaction of Fe(C≡CSiMe3)(dppe)Cp with methyllithium and phenyl cyanate. Complex 3 is a good metalloligand, and coordination to the metal fragments [RhCl(CO)2], [Ru(PPh3)2Cp]+, and [Ru(dppe)Cp*]+ affords the corresponding cyanoaceylide-bridged heterobimetallic complexes. In the case of the 36-electron complexes [Cp(dppe)Fe-C≡CC≡N-MLn]n+, spectroscopic and structural data are consistent with a degree of charge transfer from the iron centre to the rhodium or ruthenium centre via the C3N bridge, giving rise to a polarized ground state. Electrochemical and spectroelectrochemical methods reveal significant interactions between the metal centres in the oxidized (35 electron) derivatives, [Cp(dppe)Fe-C≡CC≡N-MLn](n+1)+. Key words: cyanide, cyanoacetylide, crystal structure.

Sign in / Sign up

Export Citation Format

Share Document