ICCAS OpenIR
A Low-Bandgap Conjugated Polymer Based on Squaraine with Strong Two-Photon Absorption
Shi, Qinqin1,2,5; Chen, Wei-Qiang3,4; Xiang, Junfeng1,2; Duan, Xuan-Ming3,4; Zhan, Xiaowei1,2
2011-05-24
Source PublicationMACROMOLECULES
ISSN0024-9297
Volume44Issue:10Pages:3759-3765
AbstractA new low-bandgap pi-conjugated D-A copolymer of squaraine and pyridopyrazine (P1) and a new small molecule squaraine-pyridopyrazine model compound (P2) were synthesized and compared. PI and P2 exhibit strong NIR absorption and low bandgap (1-1.3 eV). P2 in solution shows an intense and sharp absorption peak at 764 nm, while P1 in solution exhibits a red-shifted and broad absorption peak at 808 nm. The HOMO and LUMO levels of P1 were estimated to be -5.02 and -4.15 eV, while the HOMO and LUMO levels of P2 were estimated to be -5.27 and -3.22 eV, respectively. Polymer PI exhibits strong two-photon absorption (2PA) at telecommunication wavelengths with 2PA cross sections per repeat unit as high as 2300 GM, 3-5 times that for the small molecule P2. The higher HOMO, the lower LUMO levels, lower bandgap, red-shifted absorption, and stronger two-photon absorption of PI are attributed to higher degree of conjugation and delocalization of pi-electrons in the polymer.
DOI10.1021/ma200386f
Indexed BySCI
Language英语
WOS IDWOS:000290511500012
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:29[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/73482
Collection中国科学院化学研究所
Corresponding AuthorZhan, Xiaowei
Affiliation1.Chinese Acad Sci, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Key Lab Organ Solids, Inst Chem, Beijing 100190, Peoples R China
3.Chinese Acad Sci, Lab Organ Nanophoton, Beijing 100190, Peoples R China
4.Chinese Acad Sci, Key Lab Photochem Convent & Funct Mat, Tech Inst Phys & Chem, Beijing 100190, Peoples R China
5.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Shi, Qinqin,Chen, Wei-Qiang,Xiang, Junfeng,et al. A Low-Bandgap Conjugated Polymer Based on Squaraine with Strong Two-Photon Absorption[J]. MACROMOLECULES,2011,44(10):3759-3765.
APA Shi, Qinqin,Chen, Wei-Qiang,Xiang, Junfeng,Duan, Xuan-Ming,&Zhan, Xiaowei.(2011).A Low-Bandgap Conjugated Polymer Based on Squaraine with Strong Two-Photon Absorption.MACROMOLECULES,44(10),3759-3765.
MLA Shi, Qinqin,et al."A Low-Bandgap Conjugated Polymer Based on Squaraine with Strong Two-Photon Absorption".MACROMOLECULES 44.10(2011):3759-3765.
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