title: Multistimuli-Responsive Luminescence of Naphthalazine Based on Aggregation-Induced Emission.
abstract: Stimuli-responsive luminescent materials, which are dependent on changes in physical molecular packing modes, have attracted more and more interest over the past ten years. In this study, 2,2-dihydroxy-1,1-naphthalazine was synthesized and shown to exhibit different fluorescence emission in solution and solid states with characteristic aggregation-induced emission (AIE) properties. A remarkable change in the fluorescence of 2,2-dihydroxy-1,1-naphthalazine occurred upon mechanical grinding, heating, or exposure to solvents. According to the characterization by solid-state fluorescence spectroscopy, X-ray crystallography, differential scanning calorimetry, and X-ray powder diffraction, the fluorescence change could be attributed to transitions between two structurally different polymorphs. These significant properties could also give 2,2-dihydroxy-1,1-naphthalazine more potential applications as a multifunctional material.
authors.affiliation: Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University Tianshui Road, Lanzhou, P. R. China.
authors.forename: Xiang
authors.initials: X
authors.lastname: Yao
authors.affiliation: Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University Tianshui Road, Lanzhou, P. R. China.
authors.forename: Jia-Xi
authors.initials: JX
authors.lastname: Ru
authors.affiliation: Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University Tianshui Road, Lanzhou, P. R. China.
authors.forename: Cong
authors.initials: C
authors.lastname: Xu
authors.affiliation: Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University Tianshui Road, Lanzhou, P. R. China.
authors.forename: Ya-Ming
authors.initials: YM
authors.lastname: Liu
authors.affiliation: Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University Tianshui Road, Lanzhou, P. R. China.
authors.forename: Wei
authors.initials: W
authors.lastname: Dou
authors.affiliation: Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University Tianshui Road, Lanzhou, P. R. China.
authors.forename: Xiao-Liang
authors.initials: XL
authors.lastname: Tang
authors.affiliation: Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University Tianshui Road, Lanzhou, P. R. China.
authors.forename: Guo-Lin
authors.initials: GL
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University Tianshui Road, Lanzhou, P. R. China.
authors.forename: Wei-Sheng
authors.initials: WS
authors.lastname: Liu
keywords: aggregation-induced emission; fluorescence; luminescent materials; multistimuli-responsive materials; polymorphs