3096-56-8Relevant articles and documents
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Hromatka,O. et al.
, p. 1567 - 1576 (1967)
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Molecular transmission: Controlling the twist sense of a helical polymer with a single light-driven molecular motor
Pijper, Dirk,Feringa, Ben L.
, p. 3693 - 3696 (2007)
Twisted sisters: Transmission of chirality from a light-driven rotary molecular motor to the macromolecular level of a polyisocyanate allows fully reversible control of the preferred helical sense of the polymer backbone (see picture). (Figure Presented).
Direct deoxygenative intramolecular acylation of biarylcarboxylic acids
Li, Yantao,Xu, Wentao,Zhu, Chengjian,Xie, Jin
, p. 387 - 390 (2021)
A photocatalyzed intramolecular cyclization is developed for the synthesis of fluorenones. In this photoredox reaction, triphenylphosphine is used as an inexpensive and effective deoxygenative reagent for biarylcarboxylic acids to give acyl radicals, which quickly undergo intramolecular radical cyclization. Reactions in the presence of air and continuous flow photoredox technology demonstrate the generality and practicality of this process.
A solution processable fluorene-fluorenone oligomer with aggregation induced emission enhancement
Ananthakrishnan, Soundaram Jeevarathinam,Varathan, Elumalai,Ravindran, Ezhakudiyan,Somanathan, Narayanasastri,Subramanian, Venkatesan,Mandal, Asit Baran,Sudha, Janardanan D.,Ramakrishnan, Rajaraman
, p. 10742 - 10744 (2013)
Herein, we report a novel solution processable fluorenone based small molecule with an Aggregation Induced Emission Enhancement (AIEE) property. In contrast to previous reports, the presence of the fluorenone moiety in FF triggers the AIEE property.
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Suzuki,K. et al.
, p. 1299 - 1302 (1962)
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Suzuki,K.,Momoi,M.
, p. 1693 - 1694 (1963)
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New highly fluorescent phthalocyanines dendrimers with fluorenyl-based connectors vs phenyl-based connectors
Ben Hassine, Sarra,Abid, Seifallah,Jamoussi, Bassem,Paul-Roth, Christine O.
, (2021/12/30)
The design of dendrimers featuring conjugated fluorenyl dendrons via new connectors allows evaluating the importance of the role of these junctions and the nature of the core, on the optical properties of interest. In the continuation of our sustained interest for dendrimers and their use as luminescent labels for bioimaging, we wondered about the effect of changing the central porphyrin core for a phthalocyanine one in these macromolecular structures. Thus, a related phthalocyanine-based dendrimer possessing up to eight conjugated 9,9-dibutyl-2-fluorenyl endgroups was designed, and for the first time, these endgroups are linked to the central phthalocyanine core by new fluorenyl-based connectors C2 instead of the more classic 1,3,5-phenylene one C1. This original dendrimer was characterized and studied and as for porphyrin analogues, it was found that an efficient energy transfer occurs from the peripheral fluorenyl units to the central phthalocyanine core, leading to an intense red light emission. The luminescence is improved compared to that of their porphyrin-cored analogues for bioimaging, evidencing the key role played by the central core in this respect and the nature of the connector Cn. The impact of the structural changes of the core in relation with the impact resulting from the changes in dendron connectors is discussed.
Preparation method 2 -amino -9-9 - diphenyl fluorene
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Paragraph 0054-0060; 0074-0079; 0090-0095, (2021/11/03)
The invention discloses a preparation method of 2 - amino -9 and 9 - diphenyl fluorene, which comprises the following steps: taking 9 - fluorenone as a raw material, and carrying out bromination reaction to obtain 2 - bromo -9 - fluorenone. 2 - Bromo -9 - fluorenone and bromobenzene formative reagent are reacted to obtain 2 - bromo -9 - phenyl -9 - hydroxyl - fluorene. 2 - Bromo -9 - phenyl -9 - hydroxy - fluorene was subjected to an alkylation reaction with benzene to give 2 - bromo -9, 9 - diphenylfluorene. 2 - Bromo -9, 9 - diphenylfluorene and cuprous oxide, palladium acetate (II) and N - methylpyrrolidinone were reacted in liquid ammonia to give 2 - amino -9, 9 - diphenylfluorene. The preparation method is used for preparing 2 - amino -9 and 9 - diphenylfluorene, the used preparation is easy to obtain, the technological process is simple, the product yield is high, the production cost is reduced, 2 - amino -9 and 9 - diphenyl fluorene are produced.
Hole transport material and organic electroluminescent device containing same
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Paragraph 0046; 0049-0050; 0079; 0082; 0085; 0087; 0115, (2021/02/24)
The invention discloses a hole transport material and an organic electroluminescent device containing the same, and relates to the field of organic electroluminescent materials, wherein the structuralformula is shown in the specification. According to the invention, compared with a control example, the organic electroluminescent device prepared from the hole transport material has the advantagesthat the voltage is greatly reduced, and the light-emitting efficiency is remarkably improved, so that the compound provided by the invention can greatly reduce the driving voltage of the device, greatly reduces the consumption of electric energy, and remarkably improves the luminous efficiency; and by reducing the driving voltage, the service life of the organic electroluminescent device is remarkably prolonged.