Synthesis And Luminescent Properties Of Aryl-substituted Naphthalene Compounds

Polycyclic aromatic hydrocarbon has always been one of research focuses in organic synthetic chemistry, theoretical chemistry and materials chemistry. Currently, the structures of compunds reported are more singleness and the conjugated structures are little changed because of the efficient synthetic methods. Blue light material with high luminous efficiency and carrier mobility cannot satisfy practical use. The molecular Naphthalene as parent structure possess high thermostability and optical stability, which provide guarantees to purify and cognize the materials. Naphthalene derivatives have large-energy band gap which could provide the possibility for regulate the photoelectric properties of molecules. Moreover, Poly-phenyl Naphthalene derivatives have more reactive sites than the others, and the compounds with carrier injection and transmission performance can be achieved by introducing various substituents. In this paper, utilize the favorable carbocation intermediate as electrophile to synthesize eight kinds of Naphthalene compounds; The optical, thermodynamic and crystal structure of these compounds were studied; AIEE property and mechanism were also investigated; The aggregations of this kind of compounds" self-assembly property also were discussed. The paper is consisted of some contents as following:1. The synthesis of aryl-substituted naphthalene compounds. Uitilizing new way to synthesize naphthalene compounds NAP 1-8 without noble metal catalyst and polystep organic reaction The structures of eight new molecules were characterized by 1H NMR,13C NMR, HRMS and X-ray analysis. Besides, we also explored the conditions of this reaction.2. The luminance study of poly-phenyl naphthalene compounds. The compounds synthesized presented blue emitting which emitted wavelength range of were 410-440nm. The compounds were ideal blue light emitting materials because of high solid fluorescence quantum efficiency and good thermal stability. The theoretical calculation of quantum chemistry stated that the compounds NAP 1-8 had optical bandgap. All the eight Naphthalene derivatives had many active sites, so they were chemical modified.3. The AIEE of poly-phenyl naphthalene compounds. The result of UV-absorption and fluorescence-emission stated that NAP 1-8 had the feature of aggregation-induced emission enhancement. Besides, we also investigated the structures of aggregations.