845785-76-4Relevant academic research and scientific papers
Effective tuning of HOMO and LUMO energy levels by p-n diblock and triblock oligomer approaches
Wan, Jun-Hua,Feng, Jia-Chun,Wen, Gui-An,Wei, Wei,Fan, Qu-Li,Wang, Chuan-Ming,Wang, Hong-Yu,Zhu, Rui,Yuan, Xiang-Dong,Huang, Chun-Hui,Huang, Wei
, p. 2565 - 2571 (2006)
A novel series of oligomers consisting of thiophene as a p-type unit and oxadiazole as an n-type unit were separately synthesized. On the basis of the characterization of photophysical and electrochemical properties, the structure-property relationships of the oligomers were investigated. Cyclic voltammogram studies showed that changing the number of thiophene and oxadiazole units could effectively modulate the electronic properties of the p-n diblock and triblock oligomers. The effect of molecular regiochemistry on electronic properties is also investigated. The observed electronic properties were consistent with theoretical calculations. These systems serve as excellent examples, demonstrating the band gap control principle in the p-n heterostructure oligomers.
Tuning the Solid State Emission of Thin Films/Microspheres Obtained from Alternating Oligo(3-octylthiophenes) and 2,6-Bis(pyrazole)pyridine Copolymers by Varying Conjugation Length and Eu3+/Tb3+ Metal Coordination
Narayana, Yemineni S. L. V.,Baumgarten, Martin,Müllen, Klaus,Chandrasekar, Rajadurai
, p. 4801 - 4812 (2015/08/04)
A series of dialkynyl-functionalized oligo(3-octylthiophene)m (m = 1-7 and 9, where m is the number of thiophene units) were polymerized together with 2,6-bis(pyrazole)pyridine (BPP) to get alternating copolymers (P1-P7 and P9) with the number-average molecular weights (Mn) in the range of 5.3-11 kDa. These copolymers were further self-assembled into solid microspheres. The optical emission range of these copolymers were fine-tuned from blue to red and white by changing the conjugation length of thiophene oligomers (band gap approximately from 2.1 to 1.67 eV) and coordination of metals like Eu3+ and Tb3+ in both the solution and solid states. A white color was obtained in solution, thin film, and microsphere states with CIE (Commission Internationale de l'Eclairage) coordinates close to the values of standard white color.
New p-n diblock and triblock oligomers: Effective tuning of HOMO/LUMO energy levels
Wan, Jun-Hua,Feng, Jia-Chun,Wen, Gui-An,Wang, Hong-Yu,Fan, Qu-Li,Wei, Wei,Huang, Chun-Hui,Huang, Wei
, p. 2829 - 2833 (2007/10/03)
A new series of oligomers consisting of thiophene as p-type unit and oxadiazole as n-type unit were synthesized, and their photophysical and electrochemical properties were evaluated. Cyclic voltammography studies demonstrated that the electronic properties of the p-n diblock oligomers could be modulated by changing the number of thiophene and oxadiazole rings. The molecular regiochemical effect to the electrochemical and optical properties was also investigated.
