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首页> 外文期刊>RSC Advances >White light emission produced by CTMA-DNA nanolayers embedded with a mixture of organic light-emitting molecules
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White light emission produced by CTMA-DNA nanolayers embedded with a mixture of organic light-emitting molecules

机译：由嵌入有机发光分子混合物的CTMA-DNA纳米层产生的白光发射

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Researchers have started to recognize that biomaterial-based devices and sensors can be used in the development of high-performing environmentally-friendly technologies. In this regard, DNA can be utilized as a competent scaffold for hosting functional nanomaterials to develop a designated platform in the field of bionanotechnology. Here, we introduce a novel methodology to construct CTMA-modified DNA nanolayers (CDNA NLs) embedded with single ( e.g. , red, green, and blue), double (violet, yellow, and orange), and triple (white) iridium-based organic light-emitting materials (OLEMs, including Ir(piq) _(2) (acac) for red, Ir(ppy) _(2) (acac) for green, FIrpic for blue) that can serve as active light-emitting layers. The OLEM-embedded CDNA NLs were fabricated using simple solution processes, and their spectral properties were investigated via Fourier-transform infrared (FTIR), X-ray photoelectron (XPS), UV-Vis, and photoluminescence (PL) spectroscopies. FTIR analysis of OLEM-embedded CDNA NLs suggested that the complexes are stable and chemically inert. XPS revealed the various modes of interaction between OLEMs and CDNA. The evidence of interactions between blue OLEM and CDNA was demonstrated by peak shifts. The wide band gap characteristics (～4.76 eV) and relatively high optical quality (no absorption in the visible region) of OLEM-embedded CDNA NLs were observed in UV-Vis absorption measurements. We observed PL emission in OLEM-embedded CDNA NLs, which was caused by the energy transfer from CDNA to OLEMs (ligand-centered and metal to ligand charge transfer). Lastly, a white light-emitting OLEM-embedded CDNA thin film was constructed using a combination of appropriate concentrations of red, green, and blue OLEMs. Its characteristic was demonstrated through spectral measurements. In addition, colour coordinates were plotted in the International Commission on Illumination (CIE) colour space, which confirmed the colour identity for the developed colours (including white). Consequently, the OLEM-embedded CDNA NLs can likely be used as a functional material in bio-imaging and bio-photonics.
机译：研究人员已经开始认识到，基于生物材料的设备和传感器可用于开发高性能的环保技术。在这方面，DNA可以用作承载功能纳米材料的有效支架，以开发生物纳米技术领域中的指定平台。在这里，我们介绍一种新颖的方法来构造CTMA修饰的DNA纳米层（CDNA NL），该纳米层嵌入了基于铱的单个（例如红色，绿色和蓝色），双重（紫色，黄色和橙色）和三重（白色）铱可以用作有源发光层的有机发光材料（OLEM，包括红色的Ir（piq）_（2）（acac），绿色的Ir（ppy）_（2）（acac），蓝色的FIrpic） 。 OLEM嵌入的CDNA NLs使用简单的溶液法制备，并通过傅立叶变换红外（FTIR），X射线光电子（XPS），UV-Vis和光致发光（PL）光谱学研究了它们的光谱特性。 OLEM嵌入的CDNA NLs的FTIR分析表明，该配合物是稳定的并且是化学惰性的。 XPS揭示了OLEM和CDNA之间的各种相互作用方式。蓝色OLEM和CDNA之间相互作用的证据已通过峰位移证明。在紫外-可见吸收测量中观察到OLEM嵌入的CDNA NL的宽带隙特性（〜4.76 eV）和相对较高的光学质量（可见区域无吸收）。我们观察到嵌入OLEM的CDNA NL中的PL发射是由于从CDNA到OLEM的能量转移（配体中心和金属到配体的电荷转移）引起的。最后，使用适当浓度的红色，绿色和蓝色OLEM的组合，构建了嵌入白色发光的OLEM嵌入式CDNA薄膜。通过光谱测量证明了其特性。此外，在国际照明委员会（CIE）色彩空间中绘制了颜色坐标，该坐标确认了已显影颜色（包括白色）的颜色标识。因此，嵌入OLEM的CDNA NL可以用作生物成像和生物光子学中的功能材料。

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