Fabrication and Investigation of 26NCA Films Exhibiting Tunable Blue Fluorescence Based on LVPVDM

Yufeng Ding,Yun Wang,Qingyun Meng,Xiaoyu Zhai,Huimei He,Ruoyu Zhang,Xinyue Hu,Liangliang Pan,Siqi Li,Dapeng Zhang

doi:10.1155/2018/5426427

Abstract

The development of metallic fluorescent materials, π-conjugated molecular systems with high-efficiency generation of blue light, and new ways to fabricate metallic/organic luminescent materials plays an important role in the fields of large-scale flat panel displays and soft optical devices. Herein, different fluorescent films have been fabricated by low vacuum physical vapor deposition method (LVPVDM), including single/two-component films. Compared with raw materials, all films show novel fluorescent behaviors, which means potential application in the fields of multicolor luminescence and thickness-optical response sensors. Meanwhile, the speculation is demonstrated in many ways that the maximum emission (λemmax) at 406 nm and 426 nm of pristine 2,6-naphthalenedicarboxylic acid (26NCA) is caused by the crystal structure, while the shoulder peak at 445 nm is caused by the self-structure of 26NCA molecule. Significantly, this speculation may afford new insight into the relationship between not only crystal structure and luminescence, but also molecular self-structure and luminescence, which means a new strategy to tune the fluorescent behaviors based on molecular self-structure by LVPVDM. Therefore, this work provides a facile way to fabricate single/multicomponent metallic/organic film materials with tunable blue luminescence properties, which have potential application in the fields of next generation of photofunctional materials.

Highlights

Organic solid-state photoactive chromophores have received increasing attention during the past 20 years due to their unique optical properties and promising optoelectronic applications in the fields of lasers [1, 2], sensors [3,4,5,6,7], and biological imaging [8,9,10]
Fluorescence, Structural Study, and Surface Morphology of Single-Component Metallic In Film. 400 nm In film prepared by low vacuum physical vapor deposition method (LVPVDM) shows obvious well-defined ultraviolet and blue fluorescence, while block metal In lacks visible solidstate fluorescence, and the resulting fluorescence emission spectrum is shown in Figure 2, where 400 nm In film has two λ max em at 359 nm and pattern can offer some structure information of materials, and Figure S1 in Supplementary Materials shows the X-ray diffraction (XRD) pattern of 400 nm
26NCA molecule instead of the crystal structure of 26NCA, which means that λemmax at 406 nm and 426 nm of 26NCA is caused by the crystal structure of 26NCA, while the shoulder peak at 445 nm of 26NCA is caused by the self-structure of Figure S10 shows the resulting XRD pattern of

Summary

Introduction

Organic solid-state photoactive chromophores have received increasing attention during the past 20 years due to their unique optical properties and promising optoelectronic applications in the fields of lasers [1, 2], sensors [3,4,5,6,7], and biological imaging [8,9,10]. Multicomponent strategies based on molecular recognition and self-assembly have emerged as a new direction for the design and fabrication of molecule-based micro/nanomaterials with tunable composition, crystal structures, solid-state morphologies, and properties. This has shed new light on the structure-performance relationships for molecular solids at the micro/nanometer scale [35,36,37]. Little attention has been focused on the tunable fluorescence of micro/nanostructured single/twocomponent metallic/organic fluorescent films, which are expected to be used in large-scale flat panel display [29]. The work, is based on LVPVDM to prepare singlecomponent metallic In film and organic 26NCA film and two-component films of 26NCA/In and 26NCA/OFN and study the fluorescence properties

Experimental Section

Results and Discussion

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Conclusion

Conflicts of Interest