Preparation and Spectral Properties of Spirofluorene Oxygen Complex LB Films

GAO Xue-xi; WANG Wen-jun; LIU Yun-long; YAO Yi-cun; ZHANG Bing-yuan; DU Qian-qian; XIA Shu

doi:10.3788/fgxb20163703.0315

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Preparation and Spectral Properties of Spirofluorene Oxygen Complex LB Films

更新时间：2020-08-12

- Preparation and Spectral Properties of Spirofluorene Oxygen Complex LB Films
- Chinese Journal of Luminescence Vol. 37, Issue 3, Pages: 315-320(2016)
- 作者机构：
  
  聊城大学物理科学与信息工程学院, 山东省光通信科学与技术重点实验室,山东聊城,252059
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20163703.0315
  CLC： O484.4
- Received：08 November 2015，
  
  Revised：16 December 2015，
  
  Published：05 March 2016
- 稿件说明：
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高学喜, 王文军, 刘云龙等. 螺芴氧杂蒽LB膜的制备及光谱特性研究[J]. 发光学报, 2016,37(3): 315-320

GAO Xue-xi, WANG Wen-jun, LIU Yun-long etc. Preparation and Spectral Properties of Spirofluorene Oxygen Complex LB Films[J]. Chinese Journal of Luminescence, 2016,37(3): 315-320
高学喜, 王文军, 刘云龙等. 螺芴氧杂蒽LB膜的制备及光谱特性研究[J]. 发光学报, 2016,37(3): 315-320 DOI： 10.3788/fgxb20163703.0315.

GAO Xue-xi, WANG Wen-jun, LIU Yun-long etc. Preparation and Spectral Properties of Spirofluorene Oxygen Complex LB Films[J]. Chinese Journal of Luminescence, 2016,37(3): 315-320 DOI： 10.3788/fgxb20163703.0315.

摘要

为了研究聚芴材料DSFX-SFX分子在气液两相表面的行为

分子处于溶液、LB膜及粉末状态的光学特性

以及分子有序排列对其发光特性的影响

制备了聚芴材料DSFX-SFX的X型LB膜

研究了-A等温曲线

测量了其紫外-可见吸收谱和稳态荧光光谱。结果表明

分子以face-on形式平躺在亚相表面

单分子面积为4.78 nm

。在氯仿溶液中吸收峰位在354 nm

归属于分子中三聚氧杂蒽部分与芴环间-

电子跃迁;荧光发射峰位在396

419

445 nm(肩峰)

归属于发色团三聚氧杂蒽

是芴环与氧杂蒽环之间的电荷转移。在LB膜中

吸收谱和荧光光谱与其溶液光谱相比

整体红移6 nm。结果表明:在LB膜中

两个分子形成激基缔合物

与单分子状态相比

激基缔合物的HOMO升高而LUMO降低。与粉末状态相比

该材料在LB膜中有很强的荧光发射

表明该材料形成有序排列超薄膜有利于荧光发射。

Abstract

In order to study the behavior of polyfluorene DSFX-SFX molecule in the air-water interface

the spectroscopic characteristics

and the effect of the orderly arrangement of molecular on the luminescence properties

Langmuir-Blodgett(LB) films of the polyfluorene DSFX-SFX were prepared. The -A isothermal curve was studied

and the UV-Vis absorption and steady-state fluorescence spectra were measured. The experimental results show that the molecules lie flat on the subphase surface in the form of face-on. The single molecular area is 4.78 nm

. In chloroform solution

the absorption peak is at 354 nm

which belongs to -

electronic transition of the oxygen mixing into fluorene ring. The fluorescent emission peaks are at 396

419

and 445 nm (shoulder)

respectively. This is due to the emission of trimeric oxa anthracene

and the charge transfer between the fluorene ring and oxygen impurity anthracene ring. In LB film

the fluorescence spectra have an overall red-shifted of 6 nm. This is due to formation of an excimer

leading to the elevated HOMO and the reduction of LUMO. The orderly arrangement in ultra-thin film is propitious to blue fluorescence emission.

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