25069-74-3Relevant articles and documents
Synthesis and photophysical properties of triphenylamine-based dendrimers with 1,3,5-triphenylbenzene cores
Xia, Haijian,He, Jiating,Peng, Ping,Zhou, Yinhua,Li, Yaowen,Tian, Wenjing
, p. 5877 - 5881 (2007)
Two new conjugated dendrimers bearing a triphenylamine moiety as dendrons and 1,3,5-triphenylbenzene as a core have been synthesized through a convergent synthetic strategy. These conjugated dendrimers have high fluorescence quantum yields and exhibit similar absorption and emission behaviors in solutions and in solid films, which demonstrate that these dendrimers form good amorphous states.
Piezofluorochromism of triphenylamine-based triphenylacrylonitrile derivative with intramolecular charge transfer and aggregation-induced emission characteristics
Wang, Xin,Wang, Yunhan,Zhan, Yong,Yang, Peng,Zhang, Xiaojing,Xu, Yongnan
, p. 2057 - 2061 (2018)
New triphenylacrylonitrile derivative (DPPA) with triphenylamine moiety as electron donor group has been synthesized. Its emission wavelengths were strongly affected by solvent polarity, indicating intramolecular charge transfer (ICT) transitions. It was found that DPPA was almost non-emissive in tetrahydrofuran (THF), and the emission could be intensified obviously when a great amount of H2O was added, illustrating aggregation induced emission property. It is interesting that the pristine crystal of DPPA emitted green light, and the ground made its emitting color to change into orange, which could be recovered under fumed with dichloromethane (DCM) vapor. The piezofluorochromic behavior might be switched reversibly under the stimulus of external force because of crystalline-amorphous phase transformation, which could be confirmed from the results of PXRD patterns and DSC curves in different solid states. This work might open a new strategy to provide a broad perspective for the development of AIE PFC materials.
Photorefractive response of polymeric composites with pendant triphenylamine moiety
Tsutsumi, Naoto,Murao, Takehiro,Sakai, Wataru
, p. 7521 - 7523 (2005)
The photorefractive property of newly synthesized polymeric composite, poly(4-diphenylamino)styrene (PDAS), as a triphenylamine pendant moiety is analyzed. The photorefractive performance of PADS composites including a sensitizer, a nonlinear optical dye and a plasticizer was also investigated. Photorefractive organic composites have the high potential applications such as holographic optical devices for data storage and real-time image processing. Large symmetric two-beam coupling, which is caused by out-of-phase refractive index modulation with respect to illumination pattern, is a unique feature of photorefractive materials.
Synthesis, characterization, two-photon absorption, and optical limiting properties of triphenylamine-based dendrimers
Xu, Bin,Fang, Honghua,Chen, Feipeng,Lu, Hongguang,He, Jiating,Li, Yaowen,Chen, Qidai,Sun, Hongbo,Tian, Wenjing
, p. 2457 - 2464 (2009)
Three π-conjugated dendrimers (Ph-G0, Ph-G1 and Ph-G2) bearing triphenylamine moieties have been synthesized through a convergent synthetic strategy without any protection-deprotection chemistry. The linear photophysical properties, two-photon absorption (TPA), and optical limiting behavior of the dendrimers were investigated in solution at room temperature. Linear absorption and emission spectra revealed a bathochromic shift and decreased fluorescence quantum yields with increasing dendrimer generation. A strong cooperative effect in the TPA absorption of these dendrimers was observed. The TPA cross-sections increase gradually with the proportion of triphenylamine units and the maximum value of the TPA cross-section can reach 5690 GM for Ph-G2. These triphenylamine-based dendrimers exhibited efficient two-photon optical limiting under femtosecond excitation.
An octupolar near-IR dye with triphenylamine donors: Preparation and absorption properties
Sengupta, Saumitra
, p. 307 - 310 (2003)
A topologically new NIR dye based on a carbocation centered octupole and conjugated triphenylamine donors is described. The dye produced an absorption maximum at 954 nm and by virtue of its two degenerate NBMO-LUMO transitions, showed a large molar extinction coefficient (log ε 4.9).
Copper-Catalyzed Transfer Hydrodeuteration of Aryl Alkenes with Quantitative Isotopomer Purity Analysis by Molecular Rotational Resonance Spectroscopy
Alansari, Isabella Y.,Clark, Joseph R.,Holdren, Martin S.,Neill, Justin L.,Pate, Brooks H.,Reyes, Albert,Sloane, Samantha E.,Sonstrom, Reilly E.,Vang, Zoua Pa
supporting information, p. 7707 - 7718 (2021/06/21)
A copper-catalyzed alkene transfer hydrodeuteration reaction that selectively incorporates one hydrogen and one deuterium atom across an aryl alkene is described. The transfer hydrodeuteration protocol is selective across a variety of internal and terminal alkenes and is also demonstrated on an alkene-containing complex natural product analog. Beyond using 1H, 2H, and 13C NMR analysis to measure reaction selectivity, six transfer hydrodeuteration products were analyzed by molecular rotational resonance (MRR) spectroscopy. The application of MRR spectroscopy to the analysis of isotopic impurities in deuteration chemistry is further explored through a measurement methodology that is compatible with high-throughput sample analysis. In the first step, the MRR spectroscopy signatures of all isotopic variants accessible in the reaction chemistry are analyzed using a broadband chirped-pulse Fourier transform microwave spectrometer. With the signatures in hand, measurement scripts are created to quantitatively analyze the sample composition using a commercial cavity enhanced MRR spectrometer. The sample consumption is below 10 mg with analysis times on the order of 10 min using this instrument - both representing order-of-magnitude reduction compared to broadband MRR spectroscopy. To date, these measurements represent the most precise spectroscopic determination of selectivity in a transfer hydrodeuteration reaction and confirm that product regioselectivity ratios of >140:1 are achievable under this mild protocol.
Fluorescent dye
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Paragraph 0131-0133, (2021/03/13)
To provide a fluorescent dye having higher fluorescence intensity.SOLUTION: A fluorescent dye comprises a triazole condensed ring compound represented by general formula (I). In the general formula (I), R1, R2 independently represent a substituted or unsubstituted aryl group or a substituted or unsubstituted heteroaryl group; A1 is at least one functional group selected from the group consisting of -(CH=CRa)n- (n is an integer of 1-6), -(CH2)n- (n is an integer of 1-6), -(AO)n- (AO is a C2-6 alkylene oxide, n is an integer of 1-10), -NHCOO-, -CONH-, -CONH(Rb)-, -COO-, -SO2 NH-, -HN-C(=NH)-NH-, -O-, -S-, -NRb-, -Ar- (Ar is an aryl group or a heteroaryl group), -CO-Ar-NRb-; Ra is a hydrogen atom or a C1-4 alkyl group; Rb is a C1-4 alkyl group; B1 is an alkyl ester group, an alkyl ether group, an alkyl amide group, or a (C2-6) alkylene oxide adduct thereof, or a reactive group with a biomolecule optionally having a linking group to A1.SELECTED DRAWING: None
Visible-Light-Induced Pd-Catalyzed Radical Strategy for Constructing C-Vinyl Glycosides
Li, Ming,Qiu, Yi-Feng,Wang, Cui-Tian,Li, Xue-Song,Wei, Wan-Xu,Wang, Yu-Zhao,Bao, Qiao-Fei,Ding, Ya-Nan,Shi, Wei-Yu,Liang, Yong-Min
supporting information, p. 6288 - 6293 (2020/09/02)
A novel visible-light-induced palladium-catalyzed Heck reaction for bromine sugars and aryl olefins with high regio- and stereochemistry selectivity for the preparation of C-glycosyl styrene is described. This reaction takes place in one step at room temperature by using a simple and readily available starting material. This protocol can be scaled up to a wide range of glycosyl bromide donors and aryl olefin substrates. Mechanistic studies indicate that a radical addition pathway is involved.
