- Fluorescent material with piezochromism and slovatochromism and preparation method thereof
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The invention relates to a fluorescent material with piezochromism and slovatochromism and a preparation method thereof, and belongs to the technical field of fluorescent materials. The fluorescent material with the piezochromism and the slovatochromism comprises a cyano-substituted p-phenylenevinylene compound, and the structural formula of the cyano-substituted p-phenylenevinylene compound is shown in the specification. The invention further discloses a preparation method of the fluorescent material with the piezochromism and the slovatochromism. The fluorescent material has slovatochromism and piezo-chromism performance at the same time, and compared with an existing fluorescent material, the application range is wider, and popularization is facilitated.
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Paragraph 0062-0065; 0083; 0084; 0104; 0105; 0125; 0126
(2021/05/12)
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- Bipyridyl ligand and preparation method thereof, ruthenium supramolecular self-assembly body containing bipyridyl ligand and preparation method and application of ruthenium supramolecular self-assembly
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The invention provides a novel bipyridyl bidentate ligand and a preparation method thereof. The structural formula of the novel bipyridyl bidentate ligand is shown in the specification. The inventionfurther provides a ruthenium supramolecular self-assembly body of the ligand and a preparation method of the ruthenium supramolecular self-assembly body. The preparation method comprises the followingsteps: putting a prepared ruthenium receptor and a bipyridyl ligand into a container, adding a mixed solvent of methanol and dichloromethane in equal proportion, stirring for a period of time at roomtemperature, spin-drying the solution to a certain volume after the reaction is finished, slowly adding diethyl ether, and separating out solid powder, namely the ruthenium supramolecular self-assembly body containing the bipyridyl ligand. The self-assembly body is a novel ruthenium-containing self-assembly compound, and has a good inhibition effect on cancer tumor cell lines A549 and HepG-2.
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Paragraph 0030-0036
(2020/08/18)
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- Humidity Sensing through Reversible Isomerization of a Covalent Organic Framework
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Here we report that a covalent organic framework (COF), which contains 2,5-di(imine)-substituted 1,4-dihydroxybenzene (diiminol) moieties, undergoes color changes in the presence of solvents or solvent vapor that are rapid, passive, reversible, and easily detectable by the naked eye. A new visible absorption band appears in the presence of polar solvents, especially water, suggesting reversible conversion to another species. This reversibility is attributed to the ability of the diiminol to rapidly tautomerize to an iminol/cis-ketoenamine and its inability to doubly tautomerize to a diketoenamine. Density functional theory (DFT) calculations suggest similar energies for the two tautomers in the presence of water, but the diiminol is much more stable in its absence. Time-dependent DFT calculations confirm that the iminol/cis-ketoenamine absorbs at longer wavelength than the diiminol and indicate that this absorption has significant charge-transfer character. A colorimetric humidity sensing device constructed from an oriented thin film of the COF responded quickly to water vapor and was stable for months. These results suggest that tautomerization-induced electronic structure changes can be exploited in COF platforms to give rapid, reversible sensing in systems that exhibit long-term stability.
- Jhulki, Samik,Evans, Austin M.,Hao, Xue-Li,Cooper, Matthew W.,Feriante, Cameron H.,Leisen, Johannes,Li, Hong,Lam, David,Hersam, Mark C.,Barlow, Stephen,Brédas, Jean-Luc,Dichtel, William R.,Marder, Seth R.
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p. 783 - 791
(2020/02/20)
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- Flexible Films of Covalent Organic Frameworks with Ultralow Dielectric Constants under High Humidity
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Covalent organic framework (COF) films combine the processability of polymers with the porosity and atomic precision of crystalline porous materials, properties that are long-sought-after in electronics yet hard to realize. Herein, we prepared four flexib
- Shao, Pengpeng,Li, Jie,Chen, Fan,Ma, Li,Li, Qingbin,Zhang, Mengxi,Zhou, Junwen,Yin, Anxiang,Feng, Xiao,Wang, Bo
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supporting information
p. 16501 - 16505
(2018/11/23)
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- Merging strong and weak coordination motifs in the integrative self-sorting of a 5-component trapezoid and scalene triangle
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In a dynamic six-component library, the formation of the rather weak HETPYP-I complexation can be enforced by exploiting the orthogonality and high stability of its counterpart in the sorting process, a HETTAP complex. The concept was used in a follow-up integrative self-sorting, enabling the formation of two five-component supramolecular structures: a trapezoid and a scalene triangle.
- Saha, Manik Lal,Bats, Jan W.,Schmittel, Michael
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supporting information
p. 5592 - 5595
(2013/09/12)
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- The synthesis and conformation of oxygenated trianglimine macrocycles
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The synthesis of series of D2h and C2v symmetric oxygenated aromatic dicarboxaldehydes, using dilithiation methodology, is described along with their reactivity in the [3 + 3] cyclocondensation reaction with (1R,2R)-diaminocyclohexane to give oxygenated trianglimine macrocycles. Macrocycles derived from C2v symmetric dialdehydes give macrocycles with a stereogenic aromatic plane with complete diastereocontrol, as a mixture of retainers.
- Kuhnert, Nikolai,Lopez-Periago, Ana,Rossignolo, Giulia M.
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p. 524 - 537
(2007/10/03)
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