Studies of fluorine auxochrome in C9-fluorenyl anthracenes on optoelectronic property for blue electroluminescent materials

Simple excited-state modification toward a deep-blue hybridized local and charge-transfer (HLCT) fluorophore and non-doped organic light-emitting diodes

“…Here, the benzene group can effectively increase the molecular conjugation length and thermal stability, whereas fluorination is used to improve the electron-transporting ability owing to its strong electron-withdrawal ability. [47][48][49][50][51] For verifying its feasibility, we performed the geometrical optimization and frontier orbital distributions by using the Gaussian 09 package at the B3LYP/ 6-31G(d) level. The dihedral angles between p-difluorobenzene and adjacent benzene moieties are 34.731, and 35.851 in the optimized geometry of DCZ2F (Fig.…”

Synthesis, photophysical, thermal properties and X-Ray studies of novel organic dyes bearing Inden-1-ylidene and fluorene

“…Fluorene-based molecules have been extensively studied and found applications in electronic devices, medical fields, and optics [10][11][12][13][14]. The fluorene core is indeed an excellent conjugated core due to the planarization of the biphenyl unit [15][16][17][18].…”

“…Numerous studies have tackled the advantages of combining pyrene or anthracene and fluorene groups into one chromophore [14,[28][29][30][31]. In this contribution, we designed two series of 1-dicyanomethylene -2-aryl-indones 2 and 3-amino-2,4-dicyano-1-aryl-9H-fluorene 3 (Chart 1) obtained by di/three-component one-pot method.…”

Two Novel, Simple-Structured and Easy-Synthesized Acceptors Based on Fluorene or Carbazole for Non-Fullerene Organic Solar Cells

“…The design of this molecule is based upon the following consideration: ) With the planarization of biphenyl units, uorene is a kind of electron-rich rigid conjugated molecule similar to a spiro ring. which can decrease the oxidation potential, show great thermal photochemical, thermal stability and low lying lowest unoccupied molecular orbital (LUMO), The uorenyl moiety can cause a highly sterically hindered structure that has a huge impact on the solubility of the entire molecule [13][14][15][16][17][18][19] . ) Carbazole has a low-lying Highest Occupied Molecular Orbital (HOMO) level and only one substitution position (N-position) which can be expected the π-π stacking distance between molecules [20][21][22][23] . )…”