28496-11-9Relevant articles and documents
Ester-functionalized pyrene derivatives: Effects of ester substituents on photophysical, electrochemical, electrochromic, and electrofluorochromic properties
Gong, Chengbin,He, Qi,Li, Feng,Pan, Mingyue,Tang, Qian,Zhou, Qianhua
, (2022/03/09)
Multifunctional electrochromic materials are widely used in optoelectronic devices. Pyrene is a π-electron-rich group with fluorescence properties. Ester-functionalized pyrene derivatives potentially have interesting multifunctional properties such as electrochromic and electrofluorochromic characteristics. In this work, mono-, di-, tri-, and tetra-ester-substituted pyrene derivatives were synthesized, and the effects of the number of ester substituents on their photophysical, electrochemical, electrochromic, and electrofluorochromic properties were investigated. The number of ester substituents significantly affected these properties. An increase in the number of ester substituents on the pyrene caused red shifts in the absorption and emission spectra, a decrease in the driving voltage, and changes in the electrochromic colored states and electrofluorochromic performance. Mono-, di-, and tri-ester-functionalized pyrene derivatives showed good electrochromic properties, namely good switching stabilities, high optical contrasts, rapid responses, and high coloration efficiencies. Mono- and tri-ester-functionalized pyrenes gave good electrofluorochromic performances with reversible fluorescence quenching–fluorescence restoring between colored and bleached states during the electrochromic process. Ester-functionalized pyrene derivatives were successfully used in two functional digital displays with vivid colors. These results show that ester-functionalized pyrene derivatives with good electrochromic and electrofluorochromic properties are promising candidates for use in various applications, e.g., digital displays, organic electroluminescence displays, electronic shelf labels, energy-saving windows, and electronic paper.
Ultrastable conductive microporous covalent triazine frameworks based on pyrene moieties provide high-performance CO2 uptake and supercapacitance
Mohamed, Mohamed Gamal,El-Mahdy, Ahmed F. M.,Takashi, Yasuno,Kuo, Shiao-Wei
, p. 8241 - 8253 (2020/06/10)
Covalent organic triazine frameworks (CTFs) are a subclass of covalent organic frameworks and conjugated microporous polymers that exhibit heteroatom effects and possess high surface areas and excellent chemical and thermal stabilities; they have applications in energy storage and gas adsorption. In this study, we prepared two microporous polymers the pyrene-functionalized CTFs Pyrene-CTF-10 and Pyrene-CTF-20 - through ionothermal treatment of 1,3,6,8-cyanopyrene (TCNPy) in the presence of molten zinc chloride (ZnCl2) at 500 °C (at ZnCl2-to-TCNPy molar ratios of 10?:?1 and 20?:?1, respectively). Pyrene-CTF-10 and Pyrene-CTF-20 had specific BET surface areas of 819 and 1019 m2 g-1, respectively, with pore size distributions of 1.10 and 1.35 nm, respectively, and high char yields (up to 70%). Furthermore, these Pyrene-CTF polymeric frameworks exhibited excellent specific capacitances at a current density of 0.5 A g-1: 380 F g-1 for Pyrene-CTF-10 and 500 F g-1 for Pyrene-CTF-20. In addition, both Pyrene-CTFs had excellent cycling stability, retaining 97% of their capacitances after cycling 2000 times at a current density of 10 A g-1. Moreover, Pyrene-CTF-10 displayed good CO2 uptake capacity (2.82 and 5.10 mmol g-1 at 298 and 273 K, respectively).
Two Li-Zn cluster-based metal-organic frameworks: Strong H2/CO2 binding and high selectivity to CO2
Huang, Yong-Liang,Zhong, Di-Chang,Jiang, Long,Gong, Yun-Nan,Lu, Tong-Bu
, p. 705 - 708 (2017/01/24)
Two metal-organic frameworks (MOFs) {(Me2NH2)[ZnLi(PTCA)(H2O)]}nn{3DMFC4H8O2 4H2O} (1) and {(Me2NH2)[ZnLi(PTCA)]}nn{3DMF 5H2O} (2) have been constructed from Li-Zn clusters and pyrene-1,3,6,8-tetracarboxylic acid (H4PTCA) under solvothermal conditions. Gas sorption measurements have revealed that the pore of desolvated 2 (2d) can strongly interact with H2 and CO2, with high H2 and CO2 adsorption heats of 15.3 and 51.9 kJ/mol, respectively. Furthermore, 2d can selectively adsorb CO2 over N2and CH4, with high adsorption selectivity of CO2/N2 and CO2/CH4.
