- Bithiophene-Cored, mono-, bis-, and tris-(Trimethylammonium)-Substituted, bis-Triarylborane Chromophores: Effect of the Number and Position of Charges on Cell Imaging and DNA/RNA Sensing
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The synthesis, photophysical, and electrochemical properties of selectively mono-, bis- and tris-dimethylamino- and trimethylammonium-substituted bis-triarylborane bithiophene chromophores are presented along with the water solubility and singlet oxygen s
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- Novel high band gap pendant-borylated carbazole polymers with deep HOMO levels through direct +NB- interaction for organic photovoltaics
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In this communication, we investigate the direct and still conjugated intramolecular +NB- interactions in novel high band gap borylated carbazole containing polymers, namely, poly(3,6-(N-di(2,4,6-trimethyl)phenylboryl-carbazole)-alt-
- Brandt, Rasmus G.,Sveegaard, Steffen G.,Xiao, Manjun,Yue, Wei,Du, Zhengkun,Qiu, Meng,Angmo, Dechan,Andersen, Thomas R.,Krebs, Frederik C.,Yang, Renqiang,Yu, Donghong
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- Bonding in Barium Boryloxides, Siloxides, Phenoxides and Silazides: A Comparison with the Lighter Alkaline Earths
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Barium complexes ligated by bulky boryloxides [OBR2]? (where R=CH(SiMe3)2, 2,4,6-iPr3-C6H2 or 2,4,6-(CF3)3-C6H2), siloxide
- Carpentier, Jean-Fran?ois,Cordier, Marie,Dorcet, Vincent,Hammoud, Joanna,Kahlal, Samia,Le Coz, Erwann,Roisnel, Thierry,Saillard, Jean-Yves,Sarazin, Yann
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supporting information
p. 11966 - 11982
(2021/07/16)
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- Backbone Boron-Functionalized Imidazoles/Imidazolium Salts: Synthesis, Structure, Metalation Studies, and Fluoride Sensing Properties
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Incorporation of a Lewis acidic BMes2 (Mes = mesityl) moiety at the backbone of the imidazole ring was achieved by metal-halogen exchange procedure. Among them, two isomeric boron-phosphine functionalized imidazoles (3 and 6), monoboron-functionalized imidazoles (4 and 5), and its corresponding imidazolium salts were synthesized and thoroughly characterized. The solid-state structure of 3 reveals a dimeric B-N adduct that possesses six-membered [C-B-N]2 ring, and 5 crystallizes as tetrameric B-N adduct that forms an interesting 16-membered macrocycle, whereas 4 and 6 were obtained as monomeric BMes2-substituted imidazoles. 6 behaves as a P^N-type ligand upon the coordination with CuI to afford luminescent L2Cu4I4-type metal complexes (10 and 11) whose photophysical properties were also studied. The presence (in 10) and the absence (in 11) of BMes2 made a remarkable impact on fluorescence emission causing shift from the green (10) to orange (11) region. The fluoride sensing properties of BMes2-containing imidazoles (4 to 9) were studied using UV-vis and fluorescence spectroscopy.
- Anantharaman, Ganapathi,Avinash, Iruthayaraj,Parveen, Sabeeha
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- Compound, display panel and display apparatus
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The invention provides a compound with a D-pi-A type chemical structure. The compound has the structure shown in the formula I, wherein D1 and D2 represent electron-donating groups, m, n, p and q areindependently selected from 0, 1 or 2, X and Y are indep
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Paragraph 0133; 0138-0140
(2019/08/20)
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- Aromatic heterocyclic compound and organic light-emitting display device
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The invention relates to an aromatic heterocyclic compound having a thermal active delay fluorescence (TADF) property, having a structure represented by a formula (I), wherein X1 and X2 are selected from S or O respectively; D represents a chemical group as an electron donor, and A represents a chemical group as an electron acceptor; m represents the number of electron donors D linked to the formula (I), and the electron donors D are the same or different; n represents the number of the electron acceptors linked to the formula (I), and the electron acceptors A are the same or different; m andn are 1 or 2 independently. The luminescence mechanism of the aromatic heterocyclic compound disclosed by the invention is thermal active delay fluorescence, and therefore high luminescence efficiencyis achieved. When the compound is used as a luminescent material, a luminescent host material or an object material in an organic light-emitting display device, the luminescent efficiency of the organic light-emitting display device can be improved, and the advantages of lower cost and longer service life are achieved.
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Paragraph 0132; 0133; 0134
(2018/11/22)
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- Compound and organic luminescence display device
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The invention relates to the technical field of organic electroluminescent materials, in particular to a compound and an organic luminescence display device. The compound has a structure shown by formula (I) in the description, wherein D represents an electron donor unit; A represents an electron receiver unit; m and n are respectively and independently selected from 1, 2 or 3; in addition, the sum of the m and the n is smaller than or equal to 4. When the compound is used as a luminous material, an object material or a main body material of the organic luminescence display device, high luminescence efficiency can be realized.
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Paragraph 0200-0201
(2018/10/19)
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- Accessing Two-Stage Regioselective Photoisomerization in Unsymmetrical N,C-Chelate Organoboron Compounds: Reactivity of B(ppz)(Mes)Ar
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A new family of unsymmetrical, N,C-chelate organoboron compounds B(ppz)(Mes)Ar have been synthesized and found to undergo a rare, regioselective two-stage photoisomerization, involving the Ar group only. The initial transformation is a Zimmerman rearrangement to afford yellow azaboratabisnorcaradiene isomers that are subsequently converted to unprecedented 14aH-diazaborepins via a photochemical walk rearrangement. Spectroscopic and computational studies provide insight into the formation and properties of these unique systems.
- Li, Cally,Mellerup, Soren K.,Wang, Xiang,Wang, Suning
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supporting information
p. 3360 - 3367
(2018/10/02)
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- Steric control of geminal Lewis pair behavior: Frustration induced dyotropic rearrangement
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A series of methylene-linked boron/nitrogen geminal Lewis pairs were synthesized and the impacts of sterical effect on their chemical behavior were systematically investigated. Increasing the steric demand around the boron atom is manifested first by an incremental change in the structure of the resulting dative adducts. Accordingly, in the case of phenyl substituents (Alk 2NCH2BPh2), formation of head-to-tail dimers/oligomers was observed, while such an intermolecular association was avoided when o-tolyl moiety was introduced [Alk2NCH 2B(o-Tol)2], affording only an intramolecular dative complex. Further increase of sterical hindrance to a point (i.e. using mesityl substituents), however, caused a radical change in the structure; a dyotropic rearrangement occurred. Thus, steric interference induced a rearrangement in the geminal pair to relieve or minimize the frustration strain. Georg Thieme Verlag Stuttgart New York.
- Dorkó, éva,Varga, Eszter,Gáti, Tamás,Holczbauer, Tamás,Pápai, Imre,Mehdi, Hasan,Soós, Tibor
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supporting information
p. 1525 - 1528
(2014/07/08)
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- Aromatic stabilization of the triarylborirene ring system by tricoordinate boron and facile ring opening with tetracoordinate boron
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To remove uncertainties in the apparent C=C and B-C bond lengths of the borirene ring, as previously estimated from an X-ray crystallographic analysis of trimesitylborirene, the unsymmetrically substituted 2-(2,6-dimethylphenyl)-1,3-dimesitylborirene was
- Eisch, John J.,Shafii, Babak,Odom, Jerome D.,Rheingold, Arnold L.
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p. 1847 - 1853
(2007/10/02)
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