新型树枝分子的宽带多光子荧光发射

高等学校化学学报 ›› 2010, Vol. 31 ›› Issue (11): 2268.

新型树枝分子的宽带多光子荧光发射

钱鹰1, 胡凯明1, 周志强2, 吕昌贵2, 崔一平2

1. 东南大学化学化工学院, 南京 211189;
2. 东南大学先进光子学中心, 南京 210096

收稿日期:2009-12-31 出版日期:2010-11-10 发布日期:2010-11-10
通讯作者: 钱鹰, 女, 博士, 教授, 主要从事有机光电功能材料的研究. E-mail: yingqian@seu.edu.cn
基金资助:
国家自然科学基金(批准号: 60678042, 60877024)和东南大学科学基金(批准号: 9207041399)资助.

Broadband Multiphoton Upconversion Fluorescence of Novel Dendrimers by a Femtosecond Ti∶Sapphire Laser

QIAN Ying1*, HU Kai-Ming1, ZHOU Zhi-Qiang2, LÜ Chang-Gui2, CUI Yi-Ping2

1. School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China;
2. Advanced Photonics Center, Southeast University, Nanjing 210096, China

Received:2009-12-31 Online:2010-11-10 Published:2010-11-10
Contact: QIAN Ying. E-mail: yingqian@seu.edu.cn
Supported by:
国家自然科学基金(批准号: 60678042, 60877024)和东南大学科学基金(批准号: 9207041399)资助.

摘要/Abstract

摘要： 用飞秒Ti∶sapphire激光研究了3个树枝分子1,2,4,5-四(4-N,N-二苯氨基苯乙烯基)苯(TPAB)、1,2,4,5-四[4-N,N-二(4-溴苯基)氨基苯乙烯基]苯(TPAB-Br)和1,2,4,5-四{4-{N,N-双{4-{4-[5-(4-叔丁基苯基)-1,3,4- 噁二唑-2]苯乙烯基}苯基}氨基}苯乙烯基}苯(TPAB-OXA)的多光子吸收及上转换荧光性质. 在二氯甲烷溶液中3个生色团分子TPAB, TPAB-Br和TPAB-OXA在800 nm飞秒光激发的双光子荧光发射波长分别为569, 535和 621 nm, 在1300 nm飞秒光激发的三光子频率上转换荧光发射波长分别为566, 534和 610 nm, 采用非线性透过率法测得在四氢呋喃(THF)溶液中TPAB, TPAB-Br和TPAB-OXA在800 nm和150 fs激光激发下双光子吸收截面分别为61.86×10-50, 6.19×10-50和65.98×10-50 cm4\5s/photon; 在1300 nm和80 fs激光激发下三光子吸收截面分别为3.88×10-79, 7.76×10-79和27.17×10-79 cm6\5s2. 树枝分子具有很强的多光子吸收和上转换荧光发射能力, 多光子荧光发射波长位于500~600 nm.

关键词: 树枝分子, 多光子吸收, 三光子激发荧光, 双光子激发荧光

Abstract: The multiphoton absorption and multi-photon-excited upconversion fluorescence of dendrimers, 1,2,4,5-tetra(4-N,N-diphenylaminostyryl)benzene(TPAB), 1,2,4,5-tetra[4-N,N-di(4-bromophenyl)aminostyryl]benzene(TPAB-Br) and 1,2,4,5-tetra{4-{N,N-bis{4-{4-[5-(4-tert-butylphenyl)-1,3,4-oxadiazol-2-yl]styryl}phenyl}amino styryl}benzene(TPAB-OXA), were measured by a femtosecond Ti∶sapphire laser. The absorption, fluorescence emission and fluorescence lifetime of these octupolar chromophores were investigated. Pumped by a femtosecond laser at 1300 nm and 800 nm, strong upconversion fluorescence were observed. The maximum peaks of two-photon fluorescence in the solution of CH2Cl2 are at 569 nm for TPAB, at 535 nm for TPAB-Br and at 621 nm for TPAB-OXA, respectively. The three-photon excited fluorescence with the central wavelength at 566 nm for TPAB, at 534 nm for TPAB-Br and at 610 nm for TPAB-OXA in the solution of CH2Cl2 were observed. The two-photon absorption cross-section of chromophores obtained by nonlinear transmission method was 61.86×10-50 cm4\5s/photon for TPAB and 65.98×10-50 cm4\5s/photon for TPAB-OXA in the solution of THF. Large optical power limiting was demonstrated for the octupolar chromophores. Their three-photon absorption coefficients of 1300 nm in THF were 3.88×10-79, 7.76×10-79 and 27.17×10-79 cm6\5s2, respectively. The dendrimers displayed large multi-photon absorption and strong upconversion fluorescence properties.

Key words: Dendrimer, Multiphoton absorption, Three-photon excited fluorescence, Two-photon excited fluorescence

TrendMD:

钱鹰, 胡凯明, 周志强, 吕昌贵, 崔一平. 新型树枝分子的宽带多光子荧光发射. 高等学校化学学报, 2010, 31(11): 2268.

QIAN Ying*, HU Kai-Ming, ZHOU Zhi-Qiang, Lü Chang-Gui, CUI Yi-Ping. Broadband Multiphoton Upconversion Fluorescence of Novel Dendrimers by a Femtosecond Ti∶Sapphire Laser. Chem. J. Chinese Universities, 2010, 31(11): 2268.

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