5 results about "Trans stilbene" patented technology

This invention provides an organic eutectic material with a controllable charge-transfer exciton diffusion coefficient and its preparation method. The molecular formula of this organic eutectic material is (TSB). x (TSB-Br) 1‑x (TCNB)2, wherein TSB is trans-1,2-stilbene, TSB-Br is trans-4-bromostilbene, TCNB is 1,2,4,5-phenylenetetraacetonitrile, and x is the proportion of TSB molecules. The organic eutectic material prepared by this invention has a regular morphology, high crystallinity, and exhibits both strong and delayed fluorescence emission, with continuously tunable diffusion coefficients for singlet and triplet charge-transfer excitons. The preparation method described in this invention has advantages such as low raw material cost, mild conditions, and simple operation. The prepared (TSB)2... x (TSB-Br) 1‑x (TCNB)2 organic eutectic materials have potential applications in fields such as imaging, photoelectric conversion, and spintronics.

The invention provides preparation of a ternary organic eutectic and application of the ternary organic eutectic in photocatalysis. The molecular formula of the ternary organic eutectic crystal P-TS-TC is (Pyrene) 0.1 (TSB) 0.9 (TCNB), Pyrene is pyrene, TSB is trans-1, 2-stilbene, and TCNB is 1, 2, 4, 5-benzene tetraacetonitrile. The preparation method of the P-TS-TC comprises the following steps: dissolving pyrene, TSB and TCNB in an acetonitrile solvent, and naturally volatilizing the acetonitrile solvent to obtain the orange-yellow P-TS-TC single crystal. The ternary eutectic prepared by the invention has a charge transfer state (CT state), so that the light absorption range of the ternary eutectic has obvious red shift compared with three monomer molecules pyrene, TSB and TCNB. And meanwhile, the energy levels of the three monomer molecules are arranged in a gradient manner, so that hole transfer in P-TS-TC can be effectively promoted, and the CT state delocalization in the eutectic can be regulated and controlled. Compared with binary organic eutectic crystals P-TC and TS-TC, the ternary organic eutectic crystal P-TS-TC prepared by the preparation method disclosed by the invention has longer carrier life and higher photocatalytic water splitting hydrogen production performance.

A crucible-descent growth method for ultrafast scintillation crystals of trans-stilbene is disclosed, relating to melt growth methods for organic single crystals. This method aims to address the technical problems of compositional deviation and difficulty in controlling crystal quality and size in existing solution-grown trans-stilbene single crystals. The method first purifies the raw material using solution recrystallization, then seals the recrystallized trans-stilbene in a crucible. By precisely controlling the furnace temperature field and the crucible descent rate, a stable vertical temperature gradient is formed, achieving directional solidification growth of the crystal. The trans-stilbene scintillation crystals prepared by this method have a diameter of 25 mm and a constant-diameter section length of 60 mm, exhibiting excellent optical quality and a photo-induced decay time of 4.49 ns. 137 The light yield under Cs radiation source excitation reaches 21000 ph / MeV, with a decay time of 3.81 ns, making it suitable for radiation detection.

The present disclosure provides a process for the preparation of 3, 5-dihydroxy-4-isopropyl-trans-stilbene [Benvimod] and related compounds. The present disclosure provides a process for the preparation of 3, 5-dihydroxy-4-isopropyl-trans-stilbene [Benvimod]. Aromatic hydrocarbon receptor (AHR) agonists are novel drugs for the topical treatment of adult plaque psoriasis. AHR agonists are considered to inhibit the release of pro-inflammatory proteins (cytokines) and to down-regulate inflammatory responses. The present invention relates to nematodes, in particular, nematodes, in particular, nematodes, in particular, nematodes, in particular, nematodes, in particular, nematodes, in particular, nematodes, in particular, nematodes, in particular, nematodes, in particular, nematodes, in particular, nematodes, in particular, nematodes, in particular, nematodes, in particular, nematodes, in particular, nematodes, in particular, their bacterial symbionts.

The invention discloses an ultraviolet quenching antagonist for enhancing initial fluorescence intensity and a preparation method thereof, and is characterized in that the ultraviolet quenching antagonist is formed by mixing a compound for enhancing the stability of a fluorophore, a compound for improving the initial fluorescence brightness of the fluorophore and a base solution; the compound for enhancing the stability of the fluorophore is n-propyl gallate, 1, 4-diazabicyclo [2, 2, 2] octane or tertiary butyl hydroquinone; the compound capable of improving the initial fluorescence brightness of the fluorophore is trans-1, 2-stilbene, oxidized resveratrol or 1, 6-diphenyl-1, 3, 5-hexatriene, and the compound capable of improving the initial fluorescence brightness of the fluorophore is a compound capable of improving the initial fluorescence brightness of the fluorophore. The composition is high in energy transfer speed, the initial fluorescent brightness of common fluorophores can be remarkably improved, and most fluorophores can maintain higher initial fluorescent brightness.