1284287-89-3

Upstream product

• 36809-26-4 4-N,N-diphenylamino-1-bromobenzene 
• 847978-62-5 4-[N-(4-bromophenyl)-N-phenylamine]benzaldehyde 

Downstream Products

• 1284287-91-7 C₄₃H₄₄BrN₃O₃ 

Relevant academic research and scientific papers

Guest Inclusion Modulates Concentration and Persistence of Photogenerated Radicals in Assembled Triphenylamine Macrocycles

Substituted triphenylamine (TPA) radical cations show great potential as oxidants and as spin-containing units in polymer magnets. Their properties can be further tuned by supramolecular assembly. Here, we examine how the properties of photogenerated radical cations, intrinsic to TPA macrocycles, are altered upon their self-assembly into one-dimensional columns. These macrocycles consist of two TPAs and two methylene ureas, which drive the assembly into porous organic materials. Advantageously, upon activation the crystals can undergo guest exchange in a single-crystal-to-single-crystal transformation generating a series of isoskeletal host-guest complexes whose properties can be directly compared. Photoinduced electron transfer, initiated using 365 nm light-emitting diodes, affords radicals at room temperature as observed by electron paramagnetic resonance (EPR) spectroscopy. The line shape of the EPR spectra and the quantity of radicals can be modulated by both polarity and heavy atom inclusion of the encapsulated guest. These photogenerated radicals are persistent, with half-lives between 1 and 7 d and display no degradation upon radical decay. Re-irradiation of the samples can restore the radical concentration back to a similar maximum concentration, a feature that is reproducible over several cycles. EPR simulations of a representative spectrum indicate two species, one containing two N hyperfine interactions and an additional broad signal with no resolvable hyperfine interaction. Intriguingly, TPA analogues without bromine substitution also exhibit similar quantities of photogenerated radicals, suggesting that supramolecular strategies can enable more flexibility in stable TPA radical structures. These studies will help guide the development of new photoactive materials.

UV-irradiation of self-assembled triphenylamines affords persistent and regenerable radicals

UV-irradiation of assembled urea-tethered triphenylamine dimers results in the formation of persistent radicals, whereas radicals generated in solution are reactive and quickly degrade. In the solid-state, high quantities of radicals (approximately 1 in 1

Photosensitive dye taking carbazole and triphenylamine as D-D-π-A structure of two-stage electron donor as well as preparation method and application thereof (by machine translation)

The invention belongs to the field of solar cells and discloses a photosensitive dye taking carbazole and triphenylamine as a two-stage electron donor and D-D-π-A structure as well as a preparation method and application of the photosensitive dye as a π conjugated bridge. The preparation method is simple, the process is easy to control, the raw material source is wide, the price is low, the prepared photosensitive dye is high in purity, high in yield and suitable for industrial production. The photosensitive dye is used for preparing a photo-sensitized solar cell. (by machine translation)

D-D-pi-A structured photosensitive dye using carbazole and triphenylamine as two-stage electron donors, and preparation method and application thereof

The invention discloses a D-D-pi-A structured photosensitive dye using carbazole and triphenylamine as two-stage electron donors. The photosensitive dye uses triphenylamine and carbazole as electron donors, 3,4-ethylenedioxythiophene or thiophene as a pi conjugated bridge and cyanoacetic acid as an electron acceptor. The invention also provides a preparation method of the photosensitive dye, and an application of the photosensitive dye in dye-sensitized solar cells. The photosensitive dye has various structures, and has a photoelectric conversion efficiency reaching up to 6%, and the preparation method has the advantages of simplicity, easiness in process control, low cost, and friendliness to the environment. The preparation method is suitable for preparing the D-D-pi-A structured photosensitive dye using carbazole and triphenylamine as two-stage electron donors, and the prepared photosensitive dye is suitable for being applied to the dye-sensitized solar cells.

Photosensitive dye of D-D-pi-A structure with triphenylamine as two-electron donor as well as preparation method and application of photosensitive dye

The invention discloses a photosensitive dye of a D-D-pi-A structure with triphenylamine as a two-electron donor as well as a preparation method and application of the photosensitive dye. According to the photosensitive dye, triphenylamine is adopted as the two-electron donor, 3,4-ethylene dioxythiophene is adopted as a pi conjugate bridge and cyanoacetic acid is adopted as an electron donor, the chemical structural formula of the photosensitive dye is as shown in the specification, and in the formula, R1 is a group of vinyl, butadienyl or p-divinyl benzene, and R2 is methoxy or hexyloxy. The photosensitive dye disclosed by the invention is diverse in structure and is capable of improving the dyeing property, and thus relatively high photoelectric conversion efficiency is achieved. The invention further provides a corresponding preparation method of the photosensitive dye. The photosensitive dye is prepared from a primary electron donor and a secondary electron donor of different structures through reaction. The preparation method is simple in process, low in preparation cost and environmental-friendly. The invention further provides corresponding application of the photosensitive dye. The photosensitive dye can be used for preparing dye-sensitized solar cells, and tests show about 6% of photoelectric conversion efficiency is achieved.