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• 104-03-0 4-nitrobenzeneacetic acid 
• 100-14-1 4-nitrobenzyl chloride 
• 1530-42-3 (4-nitrobenzyl)triphenylphosphonium chloride 
• 4181-05-9 4-(diphenylamino)benzaldehyde 
• 603-34-9 N,N-diphenylaminobenzene 
• 2767-70-6 (p-nitrobenzyl)triphenylphosphonium bromide 
• 100-11-8 1-bromomethyl-4-nitro-benzene 
• 99-99-0 1-methyl-4-nitrobenzene 
• 142677-07-4 4-(2-(4-nitrophenyl)ethenyl)-N,N-diphenylaniline 

Relevant academic research and scientific papers

New organic conjugated dye nano-aggregates exhibiting naked-eye fluorescence color switching

In this study, a variety of new conjugated containing strong electron-donating groups were prepared for formation of organic nano-scale aggregates. The properties and aggregation modes of these aggregates were investigated on basis of time dependent absorption, fluorescence emission spectra as well as scanning electron microscope images. The results show that nano organic aggregates could be yielded by the linear dyes in mixed DMF/H2O solvent through a simple re-precipitation method, while no aggregates of the branched dyes were produced. X-ray diffraction of single crystal and X-ray diffraction patterns of the powders results demonstrate that the linear dyes tend to show ordered molecular arrangements, while the armed dyes do not exhibit such a tendency. A remarkable fluorescence switching process under 365 nm lamp was observed for the target aggregates. This study successfully provides real examples of organic aggregates in mixed DMF/H2O solvent which have great capacity to show enhanced fluorescence color switching.

A capable of detecting the live cell mitochondria of nickel ion in high selective fluorescent probe and its preparation method (by machine translation)

A capable of detecting the live cell mitochondria of nickel ion in high selective fluorescent probe and its preparation method, the probe is containing pyridine base three-aniline [...] derivatives, in the preparation method, triphenylamine as the starting material, process for preparing the intermediate first I 4 - (N, N - diphenyl amino) benzaldehyde and intermediate [...] II P-nitro-toluene, and then the intermediate 1 and II preparation 4 - vinyl triphenylamine intermediate to the nitrobenzene, then in Pd/C, reduced under the action of the hydrazine hydrate obtained 4 - P vinyl tri-aniline, then with 2 - pyridobenzodiazepinones formaldehyde through condensation reaction to obtain the Schiff base, Schiff base in under the action of the sodium borohydride reduction to obtain the target product. The probe in the 425 nm the left and the right with good single-photon fluorescent nature. HepG2 cells after dyeing is the target product, can clearly observe the organic material to the HepG2 cells in the cytoplasm of mitochondrial has high imaging capability, and can reversibly detecting mitochondria in the nickel ion. The probe for organic dye design, preparation and life science research is of great significance. (by machine translation)

Tuning the donors to control the lifetimes of charge-separated states in triazine-based donor-acceptor systems

Six donor-acceptor systems with styrene based 9-phenyl carbazole, 4,4’-di(hydro, methyl, methoxy or octyloxy) triphenylamine and 4-methylphenyl indoline derivatives as donors, and s-triazine group as the acceptor were synthesized and characterized. The ch

A triphenylamine as a fluorophore and maleimide as a bonding group selective turn-on fluorescent imaging probe for thiols

With the biological importance of biothiols, the development of probes for thiols has been an active research area in recent years. Here, we report a novel thiol-reactive fluorescent probe based on Michael addition reaction for selectively detecting thiol

A series of triphenylamine-based two-photon absorbing materials with AIE property for biological imaging

A specific series of D-π-A (1A-3A) and D-π-A (1B-3B) structural chromophores with various electron donors and π-conjugated bridges were designed, synthesized, and fully characterized. Their crystal structures were determined by single crystal X-ray diffraction analysis. The one/two-photon absorption properties of the chromophores have been successfully tuned by using different electron donors and π-bridges. Interestingly, it was found that chromophore 3B shows quite weak fluorescence in pure DMSO, while a significant AIE (aggregation-induced emission) effect is observed in water-DMSO (v/v 90%) mixtures with a sharp increase in fluorescence intensity of about 11 times. Furthermore, chromophore 3B shows strong two-photon excited fluorescence (TPEF) and has a large 2PA action cross-section (394 GM). The results of live-cell imaging experiments show that 3B can be effectively used as a bio-imaging probe in two-photon fluorescence microscopy towards HepG2 cells in vitro. The TPEF images of 3B not only exhibit cellular cytosol uptake but also exhibit actin regulatory protein uptake which are different from OPEF images.

1, 3, 5-Triazine-cored derivatives dyes containing triphenylamine based two-photon absorption: Synthesis, optical characterization and bioimaging

A series of new one, two and three-branched two-photon absorption triazine dyes containing triphenylamine with a π-bond and a σ-electron pair as a bridge, and different electron-donating groups, have been synthesized and their photophysical properties have been systematically investigated. These dyes showed obvious solvatochromic effects, i.e., significant bathochromic shifting of the emission spectra and larger Stokes shifts were observed in more polar solvents mainly due to intramolecular charge-transfer (ICT). The two-photon absorption (2PA) cross section values were determined by two-photon excited fluorescence (TPEF) measurements in DMF. This result further proved that a σ-electron pair as a bridge is an efficient way to transfer charge as well as a π bridge to provide a large 2PA cross section, and that their 2PA cross section values (δ) increase with increasing electron-donating strength of the end group and branch number. In addition, two-photon fluorescence cell imaging of dye 7a in HeLa and MCF-7 cancer cells was demonstrated.