209603-47-4Relevant academic research and scientific papers
Synthesis and two-photon properties of small dendritic chromophores with symmetrical and unsymmetrical substituted skeletons
Lin, Tzu-Chau,Lee, Ying-Hsuan,Hu, Chia-Ling,Li, Yu-Kai,Huang, Yu-Jhen
, p. 1737 - 1745 (2012)
A set of novel multi-branched chromophores consisting of two groups of fluorene/oxadiazole-based analogues with generic skeletons of donor-π-acceptor (unsymmetrical) and donor-π-acceptor-π-donor (symmetrical) type has been synthesized and shown to display strong and broadly dispersed two-photon absorptivities in the near infrared (NIR) region on irradiation with femtosecond laser pulses. It is also demonstrated that structural parameters such as the number of donor units attached and the substitution pattern are closely connected to the molecular two-photon activities of these model compounds.
Bipolar phosphorescent iridium complex based on fluorenyl-oxadiazole, and preparation method and applications thereof
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, (2019/01/20)
The invention discloses a bipolar phosphorescent iridium complex based on fluorenyl-oxadiazole, and a preparation method and applications thereof. According to the preparation method, a bipolar main body based on fluorenyl-oxadiazole is taken as a base, group A is introduced onto the fluorenyl, group R2 is introduced onto oxadiazole; the bipolar phosphorescent iridium complex based on fluorenyl-oxadiazole is composed of a B type compound and a FB type compound, and the structures are disclosed in the invention, wherein the group A is a diphenylamine group, the group R1 is an alkyl chain, and the group R2 is an electron withdrawing group. The bipolar phosphorescent iridium complex can be taken as an OLED device auxiliary doping material, and prepared devices are excellent in performance; the synthesis patch is simple; material cost is low; and it is beneficial for development of iridium complex phosphorescent materials.
A second indole and three and carbazole-based multi-arm structure conjugated polymer material and its preparation method and application
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Paragraph 0034; 0035; 0036; 0037; 0038; 0039, (2019/05/28)
The invention relates to a diindolotricarbazole-based multi-branch structured conjugated molecular material, as well as a preparation method and application thereof. For the material, diindolotricarbazole is adopted as a core, a diphenylamine group is adopted as a termination unit, and fluorenyls with different chain lengths are adopted as bridging units. The material has a general structural formula shown in the following formula I. The material is easy to prepare, has high thermal stability, film-forming stability, hole transport capability and luminous intensity in an organic electroluminescent device, and has the potential application value in terms of organic electroluminescence, an intermediate is low in cost, a reaction process is easy to control, and a product is easy to separate and high in yield and purity.
Monodisperse Six-Armed Starbursts based on Truxene-Cored Multibranched Oligofluorenes: Design, Synthesis, and Stabilized Lasing Characteristics
Zhang, Hao,Liu, Xu,Lu, Ting-Ting,Lv, Peng,Lai, Wen-Yong
supporting information, p. 3909 - 3917 (2019/02/20)
A series of monodisperse six-armed conjugated starbursts (Tr1F, Tr2F, and Tr3F) containing a truxene core and multibranched oligofluorene bridges capped with diphenylamine (DPA) units has been designed, synthesized, and investigated as robust gain media for organic semiconductor lasers (OSLs). The influence of electron-rich DPA end groups on their optoelectronic characteristics has been discussed at length. DPA cappers effectively raise HOMO levels of the starbursts, thus enhancing the hole injection and transport ability. Solution-processed electroluminescence devices based on the resulting six-armed starbursts exhibited efficient deep-blue electroluminescence with clear reduced turn-on voltages (3.2–3.5 V). Moreover, the resulting six-armed molecules showed stabilized electroluminescence and amplified spontaneous emission with low thresholds (27.4–63.9 nJ pulse?1), high net gain coefficients (80.1–101.3 cm?1), and small optical loss (2.6–4.4 cm?1). Distributed feedback OSLs made from Tr3F exhibited a low lasing threshold of 0.31 kW cm?2 (at 465 nm). The results suggest that the construction of truxene-centered six-armed conjugated starbursts with the incorporation of DPA units can effectively enhance EL properties by precisely regulating the HOMO energy levels, and further optimizing their optical gain properties.
High-Performance Organic Dyes with Electron-Deficient Quinoxalinoid Heterocycles for Dye-Sensitized Solar Cells under One Sun and Indoor Light
Jiang, Man Ling,Wen, Jun-Jie,Chen, Zi-Ming,Tsai, Wen-Hsuan,Lin, Tzu-Chau,Chow, Tahsin J.,Chang, Yuan Jay
, p. 3654 - 3665 (2019/07/12)
A series of Y-shaped sensitizers incorporating quinoxaline or quinoxalinoid moieties were prepared and applied in dye-sensitized solar cells (DSSCs). By the introduction of quinoxalinoid functionalities, the absorption extinction coefficients could be enh
Fluorenyl tetrazole iridium complexes, and preparation method and application thereof
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Paragraph 0094; 0095, (2018/04/03)
The invention provides fluorenyl tetrazole iridium complexes, and a preparation method and application thereof. The structural formula of the fluorenyl tetrazole iridium complexes is as described in the specification. R1 in the structural formula is H or DPA, and R2 in the formula is CH3 or C6H13. The fluorenyl tetrazole iridium complexes are prepared from cyclometalated ligand, metal centers andthe auxiliary ligand picolinic acid. The fluorenyl tetrazole iridium complexes have long luminescence life, mild synthesis reaction conditions and good market application prospects.
Pyrenyl organic semiconductor laser material, preparation method and application thereof
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Paragraph 0053, (2017/10/07)
The invention discloses a pyrenyl organic semiconductor laser material, a preparation method and an application thereof. The material has a butterfly-shaped structure which takes pyrene as a core, diphenylamine group as a blocking unit, fluorenyl groups in different chain lengths as bridging units and tetra-substituted symmetric pyrene as core. The material has the structural formula as follows, wherein R is C1-C30 straight chain or branch chain alkyl or alkoxy and n is natural number from 1 to 5. The material disclosed by the invention is simply prepared; the intermediate cost is low; the reaction process is easily controlled; the products are easily separated and are high in yield and purity; the material not only shows high heat stability, low threshold value, low water and oxygen sensitivity and high light intensity in an organic laser device but also shows ultralow turn-on voltage, high luminance and efficiency in an organic electroluminescence device; the pyrenyl organic semiconductor laser material shows important application potential at the aspects of the organic semiconductor laser device and the organic electroluminescence device.
Trans/cis-isomerization of fluorene-bridged azo chromophore with significant two-photon absorbability at near-infrared wavelength
Chu, Chih-Chien,Chang, Ya-Chi,Tsai, Bo-Kai,Lin, Tzu-Chau,Lin, Ja-Hon,Hsiao, Vincent K. S.
supporting information, p. 3390 - 3396 (2015/02/19)
Azo-containing materials have been proven to possess second-order nonlinear optical (NLO) properties, but their third-order NLO properties, which involves twophoton absorption (2PA), has rarely been reported. In this study, we demonstrate a significant 2P
Synthesis and two-photon absorption properties of star-shaped chromophores derived from functionalized fluorene units
Lin, Tzu-Chau,Liu, Che-Yu,Huang, Bor-Rong,Lin, Ja-Hon,Shen, Yu-Kai,Wu, Cheng-Yu
, p. 498 - 508 (2013/02/25)
A set of small star-shaped chromophores composed of three fluorene-based congeners have been synthesized and shown experimentally to possess strong and widely dispersed two-photon absorptivities in the visible to near-IR region under the irradiation of femtosecond and nanosecond laser pulses. In addition, the number of electron-donating fluorenyl units incorporated in the final structure was closely connected to the molecular two-photon activities of these model compounds. Effective optical power attenuation and stabilization behaviors of these dye molecules in the nanosecond time domain were also investigated. The results indicate that such a structural motif could be useful in the molecular design of strong two-photon absorbing material systems for quick-responding and broadband optical suppressing-related applications, particularly for laser pulses with long durations in the near-IR region. A set of star-shaped chromophores containing functionalized fluorene units were synthesized and shown to possess ascending two-photon absorptivities with the growth of their π systems. The observed effective optical power-limiting and stabilization behaviors in the nanosecond time domain indicate that these dye molecules have potential as broadband and quick-responding optical limiters. Copyright
Degenerate two-photon absorption and effective optical-power-limiting properties of multipolar chromophores derived from 2,3,8-trisubstituted indenoquinoxaline
Lin, Tzu-Chau,Guo, Fang-Ling,Li, May-Hui,Liu, Che-Yu
, p. 2102 - 2110 (2013/09/23)
Two analogous multipolar chromophores (1 and 2) that contained 2,3,8-trisubstituted indenoquinoxaline moieties have been synthesized and characterized for their two-photon absorption properties, both in the femtosecond and nanosecond time regimes. We demonstrated that their multi-branched framework structures, which incorporated appropriately functionalized indenoquinoxaline units, afforded large molecular nonlinear absorptivities within the studied spectroscopic range. Effective optical-power-limiting and stabilization behaviors in the nanosecond regime of dye molecule (2) were also investigated and the results indicated that such a structural motif could be a useful approach to the molecular design of highly active two-photon systems for quick-response and related broadband optical-suppressing applications, in particular for confronting laser pulses of a long duration. In pole position: Two multipolar chromophores that were derived from 2,3,8-functionalized indenoquinoxaline units manifest strong and wide dispersed two-photon absorption (2PA) in the NIR region under the irradiation of femtosecond laser pulses. Moreover, these model fluorophores could act as effective power-limiters/stabilizers against nanosecond laser pulses within the same spectroscopic regime. Copyright
