灵活的有机电荷转移共晶具有近红外辐射
Wenbo Wu1, Jiaxuan Zhu1, Yifang Lu1
1National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, P R China.
有机材料的联合结晶提供了一种简单的方法,用于实现可调节的近红外 (NIR) 辐射,用于光学电信. 这种方法为开发灵活的光学设备提供了化学替代品的替代方案.
科学领域:
- 材料科学 材料科学 材料科学
- 有机电子 有机电子
- 光子学 是一个光子学.
背景情况:
- 灵活的有机晶体正在探索光学传导,但目前的研究仅限于可见光谱 (400-600 nm).
- 由于光子限制和低光学损失,光学电信需要在850-1550nm范围内的可调节发射材料.
- 化学替代可以将有机晶体排放转移到电信范围,但通常是资源密集的.
研究的目的:
- 证明共结晶是利用近红外 (NIR) 辐射获取有机材料的有效方法.
- 探索在NIR区域中用于灵活光学波导的共晶的使用.
- 为了研究分子结构,电荷转移 (CT) 相互作用和辐射特性之间的关系.
主要方法:
- 合成和表征共晶体,特别是在4,4'-二甲基双 (DM) 和7,7,8,8-四亚诺基诺二甲 (TCNQ) 之间.
- 机械测试以评估DM-TCNQ共晶体的可塑性.
- 光学光谱法用于确定NIR区域的辐射特性.
- 实验和计算分析以了解结构与属性关系.
主要成果:
- DM和TCNQ的联合结晶产生了在NIR区域发射的材料.
- 该DM-TCNQ共晶体表现出机械可塑性,并作为一个NIR光学波导.
- 分子结构被确定为影响电荷转移 (CT) 相互作用和由此产生的排放窗口的关键因素.
- 强大的CT相互作用缩小了光带间隙,导致NIR发射.
结论:
- 同结晶是一种可行的和简单的策略,用于开发有机材料与光学电信的NIR发射.
- 该DM-TCNQ共晶体展示了灵活的NIR光学波导应用的潜力.
- 了解分子结构-CT相互作用-发射关系对于设计先进光学材料至关重要.
更多相关视频
06:08Time-resolved Photophysical Characterization of Triplet-harvesting Organic Compounds at an Oxygen-free Environment Using an iCCD Camera
Published on: December 27, 2018
13:51Synthesis of Core-shell Lanthanide-doped Upconversion Nanocrystals for Cellular Applications
Published on: November 10, 2017
相关概念视频
Photochemical Electrocyclic Reactions: Stereochemistry
Selection Rules: Photochemical Activation
IR Absorption Frequency: Hybridization
Among the sp, sp2, and sp3 hybridized orbitals, sp orbitals have the maximum s character (50%). Consequently, the electrons are held more closely to the nucleus, resulting in stronger and shorter C–H bonds that...
Crystal Field Theory - Octahedral Complexes
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
Photoluminescence: Applications
