28496-11-9Relevant academic research and scientific papers
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.
MOF COMPOSITIONS FOR SELECTIVE SEPARATION OF HYDROCARBONS
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Page/Page column 30, (2020/04/25)
The present invention relates to novel metal-organic frameworks (MOFs) comprising tetratopic ligands with small pore apertures. The present invention further relates to methods of utilizing the MOFs of the invention to separate hydrocarbons through adsorptive processes.
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).
Comprehensive Study of Mononuclear Osmium Complexes with Various Pyrene Ligands
Zych, Dawid,Slodek, Aneta,Matuszczyk, Daniel,Golba, Sylwia
supporting information, p. 5117 - 5128 (2019/01/04)
New mononuclear osmium complexes M1–M4 with various NCN-cyclometalating pyrene ligands were synthesized and thoroughly characterized with particular emphasis on the nature of NCN-cyclometalating pyrene ligands on the properties of target compounds. Struct
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
supporting information, 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.
Modulation of Gas Sorption Properties through Cation Exchange within an Anionic Metal–Organic Framework
Huang, Yong-Liang,Jiang, Long,Lu, Tong-Bu
, p. 780 - 785 (2016/08/11)
A novel 3D anionic metal–organic framework (MOF) of (Me2NH2)4[Ni8(PTCA)4(μ3-OH)4(H2O)4](DMF)5(H2O)13 (H4PTCA=pyrene-1,3,6,8-tetracarboxylic acid) has been synthesized, in which Me2NH2 + can be exchanged by Li+ ions. The results of gas sorption measurements indicate that the desolvated MOFs both before and after Li+ exchange show highly selective adsorption for CO2 over CH4 and N2 gases, and the Li+-exchanged MOF exhibits enhanced CO2, CH4, and H2 storage properties.
A unique magnesium-based 3D MOF with nanoscale cages and temperature dependent selective gas sorption properties
Huang, Yong-Liang,Gong, Yun-Nan,Jiang, Long,Lu, Tong-Bu
supporting information, p. 1753 - 1755 (2013/03/14)
A porous Mg-based 3D metal-organic framework with unique nanoscale cages and two-fold interpenetrating pcu nets has been synthesized and characterized. It shows gas-uptake capacities for N2, H2, O2 and CO2 at low temperatures and selective adsorption of CO 2 over O2 and N2 at room temperature. The Royal Society of Chemistry 2013.
The usefulness of cyclic diamidines with different core-substituents as antitumor agents
Spychala, Jaroslaw
, p. 183 - 189 (2008/09/21)
A series of related polycationic compounds has been screened for potential antitumor activity by the NCI's in vitro testing (one dose primary anticancer assay and the NCI-60 full panel screening). The GI50 values of triazines 3 and 4 are on average 1.9 μM and 2.4 μM, respectively. Furan 8 deserves mention too (1.9 μM). The biological test results showed that carbazole 10 possessed cytotoxic activity in the nanomolar range, much better than the other compounds tested, only against several cancer cell lines: CCRF-CEM, HL-60(TB), MOLT-4, NCI-H522, COLO 205, SF-268, but the average GI50 value was higher (15 μM). The activity appears closely dependent on the core-shape and length of the bisimidazoline molecules (important for both high cytotoxicity and DNA binding). The mechanism of DNA minor-groove binding of diamidines 1-12, based on the anticancer parameters, is highly probable.
