1
|
Varathan E, Subramanian V. The role of sulfur oxidation in controlling the electronic properties of sulfur-containing host molecules for phosphorescent organic light-emitting diodes. Phys Chem Chem Phys 2017; 19:12002-12012. [PMID: 28443899 DOI: 10.1039/c7cp00828g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
In this study a series of dibenzothiophene (DBT) derivatives having different valence states of sulfur atoms have been reported as host materials for blue phosphorescent organic light-emitting diodes. Their electronic properties have also been thoroughly investigated to develop structure-property relationships which include the consideration of the effect of various oxidation states of the sulfur atom in the core moiety and linking (C-N linkage) of subunits with the core at different positions. The results obtained from the electronic structure calculations highlight that the triplet energy (ET), singlet-triplet energy difference (ΔEST), reorganization energy for the hole and the injection barrier for the electron decrease with an increase in the oxidation state of the sulfur atom in DBT. On the other hand, the injection barrier for the hole and the reorganization energy for the electron increase upon increasing the oxidation state of the sulfur atom present in the DBT.
Collapse
Affiliation(s)
- E Varathan
- Chemical Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai-600 020, India.
| | | |
Collapse
|
2
|
Huang Q, Fu S, Ke S, Xiao H, Zhang X, Lin S. Rhodium-Catalyzed Sequential Dehydrogenation/Deoxygenation in One-Pot: Efficient Synthesis of Dibenzothiophene Derivatives from Diaryl Sulfoxides. European J Org Chem 2015. [DOI: 10.1002/ejoc.201501075] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
|
3
|
Yang X, Zhou G, Wong WY. Functionalization of phosphorescent emitters and their host materials by main-group elements for phosphorescent organic light-emitting devices. Chem Soc Rev 2015; 44:8484-575. [PMID: 26245654 DOI: 10.1039/c5cs00424a] [Citation(s) in RCA: 393] [Impact Index Per Article: 43.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Phosphorescent organic light-emitting devices (OLEDs) have attracted increased attention from both academic and industrial communities due to their potential practical application in high-resolution full-color displays and energy-saving solid-state lightings. The performance of phosphorescent OLEDs is mainly limited by the phosphorescent transition metal complexes (such as iridium(III), platinum(II), gold(III), ruthenium(II), copper(I) and osmium(II) complexes, etc.) which can play a crucial role in furnishing efficient energy transfer, balanced charge injection/transporting character and high quantum efficiency in the devices. It has been shown that functionalized main-group element (such as boron, silicon, nitrogen, phosphorus, oxygen, sulfur and fluorine, etc.) moieties can be incorporated into phosphorescent emitters and their host materials to tune their triplet energies, frontier molecular orbital energies, charge injection/transporting behavior, photophysical properties and thermal stability and hence bring about highly efficient phosphorescent OLEDs. So, in this review, the recent advances in the phosphorescent emitters and their host materials functionalized with various main-group moieties will be introduced from the point of view of their structure-property relationship. The main emphasis lies on the important role played by the main-group element groups in addressing the key issues of both phosphorescent emitters and their host materials to fulfill high-performance phosphorescent OLEDs.
Collapse
Affiliation(s)
- Xiaolong Yang
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory for Mechanical Behavior of Materials, Department of Chemistry, Faculty of Science, Xi'an Jiaotong University, Xi'an 710049, P. R. China.
| | | | | |
Collapse
|
4
|
Effective Host Materials for Blue/White Organic Light-Emitting Diodes by Utilizing the Twisted Conjugation Structure in 10-Phenyl-9,10-Dihydroacridine Block. Chem Asian J 2015; 10:1402-9. [DOI: 10.1002/asia.201500235] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Indexed: 11/07/2022]
|
5
|
Nie H, Chen B, Quan C, Zhou J, Qiu H, Hu R, Su SJ, Qin A, Zhao Z, Tang BZ. Modulation of aggregation-induced emission and electroluminescence of silole derivatives by a covalent bonding pattern. Chemistry 2015; 21:8137-47. [PMID: 25882697 DOI: 10.1002/chem.201500002] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2015] [Indexed: 01/01/2023]
Abstract
The deciphering of structure-property relationships is of high importance to rational design of functional molecules and to explore their potential applications. In this work, a series of silole derivatives substituted with benzo[b]thiophene (BT) at the 2,5-positions of the silole ring are synthesized and characterized. The experimental investigation reveals that the covalent bonding through the 2-position of BT (2-BT) with silole ring allows a better conjugation of the backbone than that achieved though the 5-position of BT (5-BT), and results in totally different emission behaviors. The silole derivatives with 5-BT groups are weakly fluorescent in solutions, but are induced to emit intensely in aggregates, presenting excellent aggregation-induced emission (AIE) characteristics. Those with 2-BT groups can fluoresce more strongly in solutions, but no obvious emission enhancements are found in aggregates, suggesting they are not AIE-active. Theoretical calculations disclose that the good conjugation lowers the rotational motions of BT groups, which enables the molecules to emit more efficiently in solutions. But the well-conjugated planar backbone is prone to form strong intermoelcular interactions in aggregates, which decreases the emission efficiency. Non-doped organic light-emitting diodes (OLEDs) are fabricated by using these siloles as emitters. AIE-active silole derivatives show much better elecroluminescence properties than those without the AIE characterisic, demonstrating the advantage of AIE-active emitters in OLED applications.
Collapse
Affiliation(s)
- Han Nie
- Guangdong Innovative Research Team, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640 (P.R. China)
| | - Bin Chen
- College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 310036 (P.R. China)
| | - Changyun Quan
- Guangdong Innovative Research Team, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640 (P.R. China)
| | - Jian Zhou
- College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 310036 (P.R. China)
| | - Huayu Qiu
- College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 310036 (P.R. China)
| | - Rongrong Hu
- Guangdong Innovative Research Team, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640 (P.R. China)
| | - Shi-Jian Su
- Guangdong Innovative Research Team, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640 (P.R. China)
| | - Anjun Qin
- Guangdong Innovative Research Team, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640 (P.R. China)
| | - Zujin Zhao
- Guangdong Innovative Research Team, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640 (P.R. China). .,College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 310036 (P.R. China).
| | - Ben Zhong Tang
- Guangdong Innovative Research Team, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640 (P.R. China). .,Department of Chemistry, Division of Biomedical Engineering, Division of Life Science, The Hong Kong University of Science & Technology, Kowloon, Hong Kong (P.R. China).
| |
Collapse
|
7
|
Na YJ, Song W, Lee JY, Hwang SH. Synthesis of dibenzothiophene-based host materials with a dimesitylborane substituent and their green PHOLED performances. Dalton Trans 2015; 44:8360-3. [DOI: 10.1039/c4dt03700f] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two structural isomers composed by linking between dibenzothiophene and dimesitylborane moieties on the phenyl group were synthesized and showed similar green device performance regardless of their different linkage positions.
Collapse
Affiliation(s)
- Yoon-Jung Na
- Department of Polymer Science and Engineering
- Dankook University
- Yongin
- Republic of Korea
| | - Wook Song
- Department of Polymer Science and Engineering
- Dankook University
- Yongin
- Republic of Korea
| | - Jun Yeob Lee
- Department of Polymer Science and Engineering
- Dankook University
- Yongin
- Republic of Korea
| | - Seok-Ho Hwang
- Department of Polymer Science and Engineering
- Dankook University
- Yongin
- Republic of Korea
| |
Collapse
|
8
|
Lin K, Ming S, Zhen S, Zhao Y, Lu B, Xu J. Molecular design of DBT/DBF hybrid thiophenes π-conjugated systems and comparative study of their electropolymerization and optoelectronic properties: from comonomers to electrochromic polymers. Polym Chem 2015. [DOI: 10.1039/c5py00410a] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A series of DBT/DBF end-capped with thiophenes comonomers were designed and electropolymerized to yield electrochromic polymers with good performances.
Collapse
Affiliation(s)
- Kaiwen Lin
- School of Pharmacy
- Jiangxi Science and Technology Normal University
- Nanchang
- China
| | - Shouli Ming
- School of Pharmacy
- Jiangxi Science and Technology Normal University
- Nanchang
- China
| | - Shijie Zhen
- School of Pharmacy
- Jiangxi Science and Technology Normal University
- Nanchang
- China
| | - Yao Zhao
- School of Pharmacy
- Jiangxi Science and Technology Normal University
- Nanchang
- China
| | - Baoyang Lu
- School of Pharmacy
- Jiangxi Science and Technology Normal University
- Nanchang
- China
| | - Jingkun Xu
- School of Pharmacy
- Jiangxi Science and Technology Normal University
- Nanchang
- China
| |
Collapse
|
9
|
Xie N, Liu Y, Hu R, Leung NLC, Arseneault M, Tang BZ. Synthesis, Aggregation-Induced Emission, and Electroluminescence of Dibenzothiophene- and Dibenzofuran-Containing Tetraarylethenes. Isr J Chem 2014. [DOI: 10.1002/ijch.201400058] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|