216312-73-1Relevant articles and documents
Synthesis and supramolecular assembly of pentacyclic dithienofluorene and diselenophenofluorene derivatives
Lee, Chia-Hao,Lai, Yu-Ying,Cheng, Sheng-Wen,Cheng, Yen-Ju
, p. 936 - 939 (2014)
2,7-Diiodo-3,6-dibromofluorene and 2,7-dichloro-3,6-dibromofluorene have been successfully synthesized. The two key intermediates enable us to implement a regioselective Sonogashira reaction followed by intramolecular thiolate/acetylene cyclization, forming two regiospecific pentacyclic dithieno[2,3-b:7,6-b′]fluorene (2,7-DTF) and dithieno[3,2-b:6,7-b′] fluorene (3,6-DTF) isomeric molecules, respectively. By using a similar strategy, selenophene-based diselenopheno[2,3-b:7,6-b′]fluorene (2,7-DSF) as well as diselenopheno[3,2-b:6,7-b′]fluorene (3,6-DSF) were also prepared. The isomeric and sulfur/selenium effects determine the optical, electrochemical, and orbital properties. X-ray crystallography revealed that 2,7-DTF and 3,6-DTF molecules assemble into supramolecular helical structures.
Regioisomers of Organic Semiconducting Dumbbell-Shaped Molecules: Synthesis and Structure-Properties Relationship
Bulut, Ibrahim,Fall, Sadiara,Heinrich, Beno?t,Heiser, Thomas,Jing, Jiang,Lévêque, Patrick,Leclerc, Nicolas,Méry, Stéphane,Mahmoudi, Chaima,Majdoub, Mustapha,Steveler, Emilie
, p. 3170 - 3177 (2021)
Two new dumbbell-shaped molecules based on two solubilizing and structuring triazatruxene (TAT) units linked by a central chromophore were synthesized and studied. The central chromophore was an electro-deficient fluorene-malononitrile (FM) unit, that can be functionalized symmetrically on two different positions, giving rise to two positional isomers, called TAT-pFM and TAT-mFM, when the TATs are connected to the 2,7- and 3,6-positions, respectively. The two isomers exhibited different electronic conjugation pathways that drastically affect their absorption properties and energy levels. Moreover, while TAT-pFM was organized in a stable 3D mesomorphic structure from room-temperature to the melting point, TAT-mFM remained crystalline and decomposed before melting. Finally, despite a lower hole mobility, the TAT-mFM exhibited the highest Power Conversion Efficiency (PCE) of about 2 % in organic solar cells. This higher PCE was attributed essentially to the pronounced internal charge transfer band contribution to the charge photogeneration observed in TAT-mFM solar cells.
Facile synthesis of 3D covalent organic frameworksviaa two-in-one strategy
Yan, Xiaoli,Li, Hui,Shang, Pengna,Liu, Huan,Liu, Jingjuan,Zhang, Ting,Xing, Guolong,Fang, Qianrong,Chen, Long
supporting information, p. 2136 - 2139 (2021/03/06)
A “two-in-one” strategy was employed to construct 3D-COFs for the first time. Based on this strategy, a 3D-Flu-COF could be readily synthesized in various simplex organic solvents. Benefitting from the non-conjugated structure, the 3D-Flu-COF showcased ex
COMPOUND, METHOD FOR SYNTHESIZING COMPOUND HAVING PYRIDINE RING, AND LIGHT EMITTING ELEMENT
-
Paragraph 0056-0058, (2020/05/30)
The invention provides a compound, a method for synthesizing a compound having a pyridine ring, and a light-emitting element. The compound has a structure represented by the following formula (1), wherein ring A and ring B are respectively the same or different substituted or unsubstituted pyridine rings; a1 and A2 are the same or different organic groups; r1 and R2 are the same or different substituents; and m and n are respectively 0, 1, 2 or 3.