59214-70-9Relevant articles and documents
Triple Oxa[7]helicene with Circularly Polarized Luminescence: Enhancing the Dissymmetry Factors via Helicene Subunit Multiplication
Zhou, Fulin,Huang, Zhenmei,Huang, Zhongyan,Cheng, Rui,Yang, Yudong,You, Jingsong
, p. 4559 - 4563 (2021)
The development of multiple heterohelicenes with a high luminescence dissymmetry factor (glum) is an appealing yet challenging task. Herein, we disclose the synthesis of a structurally unusual furan-based triple oxa[7]helicene, which represents the first reported triple hetero[7]helicene, via [2+2+2] cyclotrimerization/intramolecular dehydrogenative annulation. Compared to the reported double oxa[7]helicene, the triple oxa[7]helicene exhibits an improved glum value of 1.8 × 10-3, exemplifying the potential of the helicene subunit multiplication approach to enhance the glum of heterohelicenes.
A series of π-extended thiadiazoles fused with electron-donating heteroaromatic moieties: Synthesis, properties, and polymorphic crystals
Kato, Shin-Ichiro,Furuya, Takayuki,Nitani, Masashi,Hasebe, Naoya,Ie, Yutaka,Aso, Yoshio,Yoshihara, Toshitada,Tobita, Seiji,Nakamura, Yosuke
, p. 3115 - 3128 (2015)
π-Extended thiadiazoles 4-8 fused with various electron-donating heteroaromatic moieties have been designed and synthesized. Just like thiadiazoles 1-3 synthesized previously, 4-8 exhibit intramolecular charge-transfer (CT) interactions, moderate-to-good fluorescence quantum yields of up to 0.78, and electrochemical amphoterism. In comparison with 1-3, the benzannulation in thiadiazoles 4-7 moderately extends the p conjugation and significantly increases the stability of the cationic species formed upon electrochemical oxidation. The fluorescence quantum yields increase remarkably from 3 to 6 and 7 due to the efficient suppression of nonradiative intersystem crossing resulting from the benzannulation. The properties of 4-8 strongly reflect the different species annulated to the pyrrole rings, namely benzothiophene, naphthalene, and benzofuran. Eleven crystals, including poly- and pseudopolymorphic crystals of 1 (1-Crys.(Y ) and 1-Crys.(G)), 2 (2-Crys.(O) and 2-Crys.(G)), 4 (4-Crys.(O) and 4-Crys. (G)), and 6 (6-Crys.(O) and 6-Crys.(G)), were obtained and characterized by X-ray crystallography. The fluorescence colors and efficiencies are distinct for each poly- and pseudopolymorph of 1, 2, 4, and 6. It has been suggested that both the extent of the electronic interactions in the π-stacked dimers and the presence of excitonic interactions originating in the 1D face-to-face slipped columns affect the fluorescence wavelengths of the poly- and pseudopolymorphs.
GLUE DEGRADERS AND METHODS OF USE THEREOF
-
Page/Page column 318, (2021/04/01)
Described herein are glue degrader compounds, their various targets, their preparation, pharmaceutical compositions comprising them, and their use in the treatment or prevention of conditions, diseases, and disorders mediated by various target proteins.
POLYCYCLIC AROMATIC DERIVATIVE COMPOUNDS AND ORGANIC LIGHT-EMITTING ELEMENTS USING THE SAME
-
Paragraph 0108; 0113-0116, (2020/06/30)
PROBLEM TO BE SOLVED: To provide: organic light-emitting compounds used in organic layers of organic light-emitting elements and capable of realizing efficient and long-lasting organic light-emitting elements; and organic light-emitting elements comprising the same. SOLUTION: An organic light-emitting compound is such that Q1 to Q3 are linked by linkers Y and X at specific positions, where Q1 to Q3 are identical to or different from each other and each independently a substituted or unsubstituted C6-50 aromatic hydrocarbon ring or a substituted or unsubstituted C2-50 heteroaromatic ring; each of the linkers Y is one selected from among N-R1, CR2R3, O, S, Se and SiR4R5; the multiple linkers Y are identical to or different from each other; and X is one selected from among B, P and P=O. SELECTED DRAWING: None COPYRIGHT: (C)2020,JPOandINPIT