Intramolecular Interactions of Highly pi-Conjugated Perylenediimide Oligomers Probed by Single-Molecule Spectroscopy

doi:10.1021/jz501765x

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	Intramolecular Interactions of Highly pi-Conjugated Perylenediimide Oligomers Probed by Single-Molecule Spectroscopy
	Cho, Jae-Won 1,2; Yoo, Hyejin 1,2; Lee, Ji-Eun 1,2; Yan, Qifan 3; Zhao, Dahui 3; Kim, Dongho 1,2
刊名	JOURNAL OF PHYSICAL CHEMISTRY LETTERS
	2014-11-06
卷号	5 期号:21 页码:3895-3901
ISSN号	1948-7185
DOI	10.1021/jz501765x
英文摘要	Highly pi-conjugated perylenediimide (PDI) oligomers are promising low band gap organic materials for various applications in optoelectronics. In this work, individual fluorescence dynamics of ethynylene- and butadiynylene-bridged dimeric and trimeric PDIs (PEP, PBP, and PEPEP) were monitored and analyzed by single-molecule fluorescence spectroscopy to gain information on the degree of extension of pi-conjugation through the acetylene bridge in PDI multichromophores. The simultaneous measurements of fluorescence intensity, lifetime, and spectrum indicate a sequential decrease in pi-conjugation upon photobleaching of PDI monomer units. Furthermore, Huang-Rhys (HR) factors, S, are obtained to evaluate the degree of electronic coupling in view of pi-conjugation and overall rigidity between the PDI units in PDI oligomers at the single-molecule level. In addition, butadiynylene-bridged dimeric PDI (PBP) reveals conformational heterogeneity due to the long butadiynylene linker. These results suggest a new way to control the photophysical properties of the PDI multichromophoric system by expansion of pi-conjugation and modification with different linker groups.
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000344579500015
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/43475]
专题	中国科学院化学研究所
通讯作者	Kim, Dongho
作者单位	1.Yonsei Univ, Spect Lab Funct Elect Syst, Seoul 120749, South Korea 2.Yonsei Univ, Dept Chem, Seoul 120749, South Korea 3.Peking Univ, Beijing Natl Lab Mol Sci, Key Lab Polymer Chem & Phys, Minist Educ,Coll Chem, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Cho, Jae-Won,Yoo, Hyejin,Lee, Ji-Eun,et al. Intramolecular Interactions of Highly pi-Conjugated Perylenediimide Oligomers Probed by Single-Molecule Spectroscopy[J]. JOURNAL OF PHYSICAL CHEMISTRY LETTERS,2014,5(21):3895-3901.
APA	Cho, Jae-Won,Yoo, Hyejin,Lee, Ji-Eun,Yan, Qifan,Zhao, Dahui,&Kim, Dongho.(2014).Intramolecular Interactions of Highly pi-Conjugated Perylenediimide Oligomers Probed by Single-Molecule Spectroscopy.JOURNAL OF PHYSICAL CHEMISTRY LETTERS,5(21),3895-3901.
MLA	Cho, Jae-Won,et al."Intramolecular Interactions of Highly pi-Conjugated Perylenediimide Oligomers Probed by Single-Molecule Spectroscopy".JOURNAL OF PHYSICAL CHEMISTRY LETTERS 5.21(2014):3895-3901.