一种新型的橙红光发射材料聚8-羟基喹啉镓的合成与光谱特性

doi:10.3964/j.issn.1000-0593(2009)05-1358-04

Abstract
References
Related Citation (15)

Download: PDF (904 KB)
Export: BibTeX | EndNote (RIS)

Abstract A ligand 5,5′-methylene-bis(8-hydroxyquinoline)(Hqq)was synthesized by condensation reaction at low temperature and was subsequently coordinated to gallium ions to prepare the polymer of tis(5,5′-methylene-bis(8-hydroxyquinoline)gallium (Gaqq₃)_n. Both chemical structure and phase structure of the ligand and complexes were characterized by Infrared absorption spectrum and X-ray diffraction (XRD). The thermal stability of the complexes was studied by thermogravimetry (TG). The photo-physical properties of the complexes were investigated by ultraviolet absorption spectrum (UV), fluorescence excitation spectrum and emission spectrum. The result indicated that (Gaqq₃)_n is a thermally stable material, whose decomposition temperature is 443.6 ℃. The ultraviolet absorption bands of (Gaqq₃)_n are in the range of 250-500 nm, with a relatively strong band tail absorption between 500 and 650 nm, which shows that the band-gap defect states exists in the forbidden band. The fluorescence excitation band of (Gaqq₃)_n is located at 380-456 nm, and (Gaqq₃)_n. emits orange-red fluorescence with the emission peak at 568 nm, which shows that the fluorescence emission of (Gaqq₃)_n is mainly attributed to the charge transfer transitions from phenol to ring pyridine ring, while the π→π^* transition of benzene ring is deactivated by non-radiative transition, and makes no contribution to fluorescence emission. (Gaqq₃)_n optical band gap is 2.49 eV. Compared with the fluorescence emission peak of Gaq₃, the fluorescence intensity of (Gaqq₃)_n decreases, which is attributed to the distortion of the two quinoline rings connected to the methylene，hence leads to the poor rigidity and coplanarity of (Gaqq₃)_n, thus affects fluorescence emission intensity. Because of the extending of the molecular conjugation system, π electron of (Gaqq₃)_n is more delocalized, resulting in the redshift of fluorescence emission peak. (Gaqq₃)_n is expected to be applied in organic light emitting display and organic photovoltaic devices.

Key words：Polymer of tis(5;5′-methylene-bis(8-hydroxyquinoline)gallium (Gaqq₃)_n;Synthesis;Spectral properties

Received: 2008-02-08 Accepted: 2008-05-12

ZTFLH:

O428.3

Corresponding Authors: HAO Yu-ying E-mail: guohaibo1016@163.com

Cite this article:

GUO Hai-bo,HAO Yu-ying,FAN Wen-hao, et al. Synthesis and Spectral Properties of Polymer of Tis(5, 5′-Methylene-Bis(8-Hydroxy-Quinoline)Gallium with Orange-Red Light Emitting [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2009, 29(05): 1358-1361.

URL:

https://www.gpxygpfx.com/EN/10.3964/j.issn.1000-0593(2009)05-1358-04 OR https://www.gpxygpfx.com/EN/Y2009/V29/I05/1358

[1] Tang C W, Vanslyke S A. Appl. Phys. Lett., 1987, 51(12): 913.
[2] Tang C W, USA: Society of Information Displays, SID 96 Digest, 1996.
[3] Posch P, Fink R, Thelakkat H, et al. Acta Polym., 1998, 49: 487.
[4] Friend R H, Gymer R W, Holmes A B, et al. Nature, 1999, 397: 121.
[5] Cao Y, Paker I D, Yu G, et al. Nature, 1999, 397: 414.
[6] WANG Wei, DING Xiao-ping, MENG Guang-zheng(王薇，丁小平, 孟广政). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2000, 20(2): 219.
[7] LIN Peng, LIANG Chun-jun, DENG Zhen-bo, et al(林鹏，梁春军, 邓振波, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2005, 25(1): 23.
[8] Noda T, Ogawa H, Shirota Y. Adv. Mater., 1999, 11: 283.
[9] Gustafsson G, Cao Y, Treacy G M, et al. Nature, 1992, 357: 477.
[10] Meyers A, Weck M. Macromolecules, 2003, 36(6): 1176.
[11] Xu Bingshe, Hao Yuying, Fang Xiaohong, et al. Appl. Phys. Lett., 2007, 90: 053903.
[12] Yu G, Yin S, Liu Y, et al. J. Am. Chem. Soc., 2003, 125: 14816.
[13] Colle M, Gmeiner J, Milius W, et al. Adv. Funct. Mater., 2003, 13: 108.
[14] Sapochak L S, Padmaperuma A, Washton N, et al. J. Am. Chem. Soc., 2001, 123: 6300.
[15] WANG Hua, HAO Yu-ying, GAO Zhi-xiang, et al(王华，郝玉英，高志翔, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2006, 26(10): 1884.
[16] Sapochak L S, Benincasa F E, Schofield R S, et al. J. Am. Chem. Soc., 2002, 124, 6119.
[17] MA Dongge, WANG Guang, Hu Yufeng, et al. Appl. Phys. Lett., 2003, 82: 1296.
[18] Qiao J, Wang L D, Duan L, et al. Inorg. Chem., 2004, 43: 5096.
[19] Yu J, Chen Z, Miyata S. Synthetic Metals, 2001, 123: 239.
[20] ZENG Xian-mou, YU Shu-wen, XU Ren-xian(曾献谋, 余淑文, 徐仁贤). Publication about Macromolecule Science Conference of Science Academy of China—Bulletin of Macromolecule Physics-Chemistry and Physical Studies(中国科学院高分子学术会议会刊—高分子物理化学及物理研究工作报告会)(1961). Beijing:Science Press(北京: 科学出版社), 1963.
[21] HAO Yu-ying, GAO Zhi-xiang, WANG Hua, et al(郝玉英，高志翔, 王华, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析)，2006，26(3):491.
[22] FANG Rong-chuan(方容川). Solid State Spectroscopy(固体光谱学). Hefei: Press of China University of Science and Technology(合肥: 中国科学技术大学出版社), 2001. 6, 128, 195.
[23] HAO Yu-ying, HAO Hai-tao, WANG Hua, et al(郝玉英，郝海涛, 王华, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2004, 24(12): 1524.
[24] HUANG Chun-hui, LI Fu-you, et al(黄春辉，李富友, 等). Ultrathin Films for Optics and Electronics(First Edition)(光电功能超薄膜，第1版). Beijing: Peking University Press(北京: 北京大学出版社), 2001. 160.
[25] ZHAO Zao-pan, ZHOU Xing-yao, et al(赵藻藩, 周性尧, 等). Instrumental Analysis(First Edition)(仪器分析, 第1版). Beijing: Higher Education Press(北京: 高等教育出版社), 1992. 158.