- White-light emission from a pyrimidine-carbazole conjugate with tunable phosphorescence-fluorescence dual emission and multicolor emission switching
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A metal-free organic carbazole-pyrimidine dye exhibiting phosphorescence-fluorescence dual emission was developed into a white-light emission-switching system. The two crystal polymorphs obtained by breaking the molecular symmetry responded to the external stimuli of heating, vapor-fuming, and mechanical grinding, resulting in a tricolor switching system that includes white-light emission.
- Hiyoshi, Hidetaka,Ishi-I, Tsutomu,Ito, Mitsunori,Kato, Shin-Ichiro,Matsumoto, Taisuke,Park, In Seob,Tanaka, Honoka,Yasuda, Takuma
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supporting information
p. 4051 - 4054
(2020/04/20)
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- COMPOUND FOR ORGANIC ELECTROLUMINESCENT DEVICE AND ORGANIC ELECTROLUMINESCENT DEVICE USING THE SAME
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Disclosed is an organic electroluminescent device (organic EL device) which is improved in luminous efficiency, fully secured of driving stability, and of simple constitution. Also disclosed is a compound useful for the fabrication of said organic electroluminescent device. This compound for organic electroluminescent device is a bipyrimidyl compound which has a basic skeleton of 2,2'-bipyrimidyl and is substituted by an aromatic hydrocarbon group, an aromatic heterocyclic group, or a substituted amino group. The aforementioned organic electroluminescent device has a light-emitting layer between an anode and a cathode which are piled one upon another on a substrate and the light-emitting layer contains a phosphorescent dopant and the aforementioned bipyrimidyl compound as a host material.
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Page/Page column 14-15
(2010/11/03)
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- Pyrimidine-core extended π-systems: General synthesis and interesting fluorescent properties
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We have developed a simple but powerful synthetic strategy that permits the assembly of π-systems onto a pyrimidine core in a programmable and diversity-oriented format. The nucleophilic addition of ArLi to 2-methylthiopyrimidine, followed by 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) oxidation, resulted in the production of 4-aryl-2-methylthiopyrimidines. The iterative reaction sequence then gave 4,6-diaryl-2-methylthiopyrimidines. The resulting adduct was further allowed to react with ArMgBr under the catalytic influence of NiCl2(dppe) to afford 2,4,6-triarylpyrimidines. By following this synthetic scheme, interesting pyrimidine-core π-systems were rapidly constructed in a programmable fashion. The successful discovery of a number of interesting fluorescent materials and properties (e.g., solvatofluorochromism) speaks well for the potential of our platform strategy in the development of functional organic materials. Copyright
- Itami, Kenichiro,Yamazaki, Daisuke,Yoshida, Jun-Ichi
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p. 15396 - 15397
(2007/10/03)
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- SYNTHESIS OF PYRIMIDINYL TRIFLATES AND PALLADIUM-CATALYZED COUPLING WITH ORGANOTIN AND ORGANOZINC REAGENTS
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Pyrimidinyl triflates have been synthesized from pyrimidinones using triflic anhydride in the presence of triethylamine.The triflates, in the pyrimidine electrophilic positions, are versatile intermediates for substitution reactions.Carbon substituents ar
- Sandosham, Jessie,Undheim, Kjell
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p. 501 - 514
(2007/10/02)
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- Studies on Heterocyclic Compounds: Part III - 4,6-Disubstituted 5,6 Dihydro-2(1H)pyrimidinethiones
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Several 4,6-disubstituted 2-(1H)-pyrimidinethiones (3) and the corresponding 5,6-dihydro derivatives (2) have been prepared by the action of chalcones (1) with thiourea and screened for their antifungal and antibacterial activities.
- Naik, S.K.,Behera, R.K.,Nayak, A.
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p. 1124 - 1125
(2007/10/02)
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