1366291-62-4Relevant articles and documents
Two blue-light excitable yellow-emitting LMOF phosphors constructed by triangular tri(4-pyridylphenyl)amine
Wang, Fangming,Zhou, Zeyu,Liu, Wei,Zhou, Lei,Chen, Lizhuang,Li, Jing
, p. 956 - 961 (2017)
Two luminescent metal-organic-frameworks (LMOFs) constructed by a molecular chromophore [tri(4-pyridylphenyl)amine] (tppa) were synthesized by solvothermal reactions and characterized by single crystal and powder X-ray diffraction, thermogravimetric analysis, optical diffuse reflection, photoluminescence spectroscopy, and internal quantum yield measurements. Both compound 1 [Zn(tppa)(ndc)·(DMF)4] and compound 2 [Zn4(tppa)2(sdc)3(NO3)2·(DMF)4·(ACN)2] (ndc = 2,6-naphthalenedicarboxylic acid, sdc = (E)-4,4′-(ethene-1,2-diyl)dibenzoic acid, DMF = dimethylformamide, ACN = acetonitrile) exhibit intense yellow emission under blue light (455 nm) excitation. The Commission International de I'Eclairage (CIE) coordinates of 1 (0.42, 0.53) and 2 (0.42, 0.54) are close to that of YAG:Ce3+ (0.41, 0.55) (λex = 455 nm). The two phosphor materials show promise for use in phosphor-converted white LEDs (PC-WLEDs).
Organization and intramolecular charge-transfer enhancement in tripodal tris[(pyridine-4-yl)phenyl]amine push-pull molecules by intercalation into layered materials bearing acidic functionalities
Melanova, Klara,Cvejn, Daniel,Bures, Filip,Zima, Vitezslav,Svoboda, Jan,Benes, Ludvik,Mikysek, Tomas,Pytela, Oldrich,Knotek, Petr
, p. 10462 - 10470 (2014)
Two new intercalates of tris[4-(pyridin-4-yl)phenyl]amine (TPPA) with zirconium hydrogen phosphate and zirconium 4-sulfophenylphosphonate having formulae Zr(HPO4)2·0.21(C33H 24N4)·2.5H2O and Zr(HO 3SC6H4PO3)1.3(C 6H5PO3)0.7·0.35(C 33H24N4)·2.5H2O were prepared and characterized by thermogravimetry, IR spectroscopy, and powder X-ray diffraction. The TPPA molecule has been selected as a model tripodal push-pull system with three peripheral basic centers that may undergo protonation. Their protonation/quaternization afforded HTPPA/MeTPPA molecules with enhanced intramolecular charge-transfer (ICT), which has been documented by electrochemical measurements, UV-Vis spectra and calculated properties such as the HOMO/LUMO levels and the first and second hyperpolarizabilities. Intercalation of TPPA into layered zirconium hydrogen phosphate and zirconium 4-sulfophenylphosphonate led to its significant organization and protonation as shown by the IR spectra. From the powder X-ray data we can deduce that the TPPA molecules are placed in the interlayer space of both hosts by anchoring two peripheral nitrogen atoms to one host layer and the opposite pyridine-4-yl terminus to the other neighboring host layer. In zirconium 4- sulfophenylphosphonate, the TPPA molecules are oriented perpendicularly, while in zirconium phosphate these molecules are slanted with respect to the layers of the host. On dehydration by heating, the interlayer distance of the intercalate decreases, which indicates a further slanting of the TPPA molecules. It follows from the UV-Vis spectra that TPPA is present in both intercalates in an equilibrium of protonated and non-protonated forms. The described materials represent the first case when a tripodal push-pull system was incorporated into a system with restricted geometry with the aim to influence its optical properties. This journal is the Partner Organisations 2014.
Quantitative Detection of G-Quadruplex DNA in Live Cells Based on Photon Counts and Complex Structure Discrimination
Ji, Liang-Nian,Liu, Liu-Yi,Liu, Wenting,Mao, Zong-Wan,Wang, Kang-Nan,Xia, Xiao-Yu,Zhu, Bo-Chen
, p. 9719 - 9726 (2020)
G-quadruplex DNA show structural polymorphism, leading to challenges in the use of selective recognition probes for the accurate detection of G-quadruplexes in vivo. Herein, we present a tripodal cationic fluorescent probe, NBTE, which showed distinguishable fluorescence lifetime responses between G-quadruplexes and other DNA topologies, and fluorescence quantum yield (Φf) enhancement upon G-quadruplex binding. We determined two NBTE-G-quadruplex complex structures with high Φf values by NMR spectroscopy. The structures indicated NBTE interacted with G-quadruplexes using three arms through π–π stacking, differing from that with duplex DNA using two arms, which rationalized the higher Φf values and lifetime response of NBTE upon G-quadruplex binding. Based on photon counts of FLIM, we detected the percentage of G-quadruplex DNA in live cells with NBTE and found G-quadruplex DNA content in cancer cells is 4-fold that in normal cells, suggesting the potential applications of this probe in cancer cell detection.
Thiocyanate ion fluorescent probe, and preparation method and application thereof
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Paragraph 0029-0036, (2021/07/14)
The invention provides a thiocyanate ion fluorescent probe. The molecular formula of the probe is C57H75N4Br3. The invention further provides a preparation method of the probe. The preparation method comprises the following steps: adding tris(4-bromo)aniline, 4-pyridine boronic acid, potassium carbonate and tetrakis(triphenylphosphine) palladium into a 1, 4-dioxane aqueous solution, reacting at 100 DEG C under the protection of N2, adding distilled water a, extracting and washing by using dichloromethane, dissolving in an ethanol aqueous solution, adding distilled water b, performing suction filtration, washing with water and petroleum ether, recrystallizing with ethanol, adding N, N-dimethylformamide for dissolving, adding 1-bromooctane, reacting at 100 DEG C, filtering, washing with acetone and petroleum ether, and drying to obtain the thiocyanate ion fluorescent probe. The invention also provides an application for identifying thiocyanate ions. The synthesis method of the thiocyanate ion fluorescent probe is simple and easy to operate, and the thiocyanate ion fluorescent probe is high in thiocyanate ion selectivity, high in specificity, real-time performance and sensitivity and has great practical significance in detection of the content of thiocyanate ions in the ecological environment.
