title: Different conjugated system Zn(ii) Schiff base complexes: supramolecular structure, luminescent properties, and applications in the PMMA-doped hybrid materials.
abstract: A series of Zn(ii) complexes with different conjugated systems, [ZnL1Cl2]2(Zn1), [ZnL2Cl2] (Zn2), [Zn(L3)2]·(ClO4)2(Zn3), [Zn2L4Cl4] (Zn4), and [ZnL5Cl2] (Zn5), were synthesized and subsequently characterized via single crystal X-ray diffraction,1H and13C NMR, FT-IR, elemental analyses, melting point, and PXRD. The X-ray diffraction analyses revealed that the supramolecular frameworks of complexes Zn1-Zn5 are constructed by C-HO/Cl hydrogen bonds and ππ interactions. Complexes Zn1-Zn3 feature 3D 6-connected {412·63} topological structures, whereas complex Zn4 exhibits a 3D 7-connected supramolecular framework with a {417·64} topological structure. However, complex Zn5 shows one-dimensional "wave-like" chains. Based on these varied structures, the emission maximum wavelengths of complexes Zn1-Zn5 can be tuned in a wide range of 461-592 nm due to the red shift direction of λemcaused by different conjugated systems and their electron donating abilities. Complex Zn3 shows a strong luminescence in the solid state and in the acetonitrile solution. Therefore, a series of Zn3-poly(methylmethacrylate) (Zn3-PMMA) hybrid materials were obtained by controlling the concentration of complex Zn3 in poly(methylmethacrylate) (PMMA). At an optimal concentration of 4%, the doped polymer film of Zn3-PMMA displays strong green luminescence emissions that are 19-fold in the luminescence intensities and 98 °C higher in the thermal stability temperature compared to the Zn3 film.
authors.affiliation: MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China. fanruiqing@hit.edu.cn ylyang@hit.edu.cn.
authors.forename: Yu-Wei
authors.initials: YW
authors.lastname: Dong
authors.affiliation: MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China. fanruiqing@hit.edu.cn ylyang@hit.edu.cn.
authors.forename: Rui-Qing
authors.identifier: http://orcid.org/0000-0002-5461-9672
authors.initials: RQ
authors.lastname: Fan
authors.affiliation: MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China. fanruiqing@hit.edu.cn ylyang@hit.edu.cn.
authors.forename: Wei
authors.initials: W
authors.lastname: Chen
authors.affiliation: MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China. fanruiqing@hit.edu.cn ylyang@hit.edu.cn.
authors.forename: Hui-Jie
authors.initials: HJ
authors.lastname: Zhang
authors.affiliation: MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China. fanruiqing@hit.edu.cn ylyang@hit.edu.cn.
authors.forename: Yang
authors.initials: Y
authors.lastname: Song
authors.affiliation: MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China. fanruiqing@hit.edu.cn ylyang@hit.edu.cn.
authors.forename: Xi
authors.initials: X
authors.lastname: Du
authors.affiliation: MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China. fanruiqing@hit.edu.cn ylyang@hit.edu.cn.
authors.forename: Ping
authors.initials: P
authors.lastname: Wang
authors.affiliation: MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China. fanruiqing@hit.edu.cn ylyang@hit.edu.cn.
authors.forename: Li-Guo
authors.initials: LG
authors.lastname: Wei
authors.affiliation: MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China. fanruiqing@hit.edu.cn ylyang@hit.edu.cn.
authors.forename: Yu-Lin
authors.initials: YL
authors.lastname: Yang