25548-35-0

Upstream product

• 60-09-3 4-Aminoazobenzene 
• 2491-52-3 4-nitroazobenzene 

Downstream Products

• 60-09-3 4-Aminoazobenzene 

Relevant academic research and scientific papers

Dip-coated rapeseed meal composite as a green carrier for light-induced controlled release of pesticide

In this work, we report the novel fabrication of polymerized octadecylsiloxane (PODS)/4-aminoazobenzene (AAB) coated rapeseed meal (RSM) using a facile one-pot dip-coating method. The as-prepared RSM-PODS/AAB employs RSM as a carrier, the PODS coating endows the material with hydrophobicity, thus improving the loading rate of pinoxaden (Pxd) of RSM-PODS/AAB, and the AAB moieties act as light-driven “stirrers” to stir the release of Pxd. The structure and composition were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, ultraviolet-visible spectroscopy and contact angle measurements. The experimental results indicate that the loading rate of Pxd was increased by 21.38% compared with pristine RSM. More importantly, the Pxd-loaded RSM-PODS/AAB showed perfect UV-visible and sunlight controlled release performance, the excellent biodegradability of RSM effectively supplying the nutrient elements of plant growth in the soil. Overall, this system provides a promising way to improve controlled drug release with UV-visible- and sunlight-responsive behavior.

Photochemical properties of multi-azobenzene compounds

A systematic study is reported of the photochemical properties of the multi-azobenzene compounds bis[4-(phenylazo)phenyl]amine (BPAPA) and tris[4-(phenylazo)phenyl]amine (TPAPA) compared to the parent molecule 4-aminoazobenzene (AAB). The bis- and tris-azobenzenes were synthesised by a variant of the Ullmann reaction and exist in their stable all-E forms at room temperature. Striking changes in the spectral positions and intensities of their first ππ* absorption bands compared to AAB reveal strong electronic coupling between the AB units. The nature of the excited states was explored by quantum chemical calculations at the approximate coupled-cluster (CC2) level. Upon UV/VIS irradiation, the molecules isomerise to the Z-isomer (AAB), ZE- and ZZ-isomers (BPAPA), and ZEE-, ZZE- and ZZZ-isomers (TPAPA), respectively. The photoswitching behaviours were investigated by UV/VIS and NMR spectroscopies. All individual isomers were detected by one-dimensional (1D) 1H NMR spectroscopy (BPAPA) and two-dimensional (2D) HSQC NMR spectroscopy (TPAPA). A kinetic analysis provided the isomer-specific thermal lifetimes. The variance of the thermal lifetimes demonstrates a dependence of the Z-E isomerisation on the chromophore size and number of AB units.

Photomechanical bending of 4-aminoazobenzene crystals

Upon photoirradiation at 365 nm, platelike microcrystals of trans-4-aminoazobenzene quickly bend away from the light source, returning to their initial linear shape when irradiation was terminated. However, relative to the observations upon cessation of 3

Polarization, excited states, trans-cis properties and anisotropy of thermal and electrical conductivity of the 4-(phenyldiazenyl)aniline in PVA matrix

In the present work, Polarization, Excited States, Trans–Cis (E?→?Z) Isomerization Properties and Anisotropy of Thermal and Electrical Conductivity of the 4-(phenyldiazenyl)aniline in the presence of polyvinyl alcohol (PVA) matrix were studied. DFT, UV/Vi

Photoinduced viscosity control of lecithin-based reverse wormlike micellar systems using azobenzene derivatives

This report describes the controlled viscosity changes of photoresponsive reverse wormlike micellar systems formed by soybean lecithin (SoyPC), d-ribose, and azobenzene derivatives in decane. UV light irradiation produces a significant (150-fold) decrease in solution viscosity by triggering a structural transformation of the wormlike micelles. Subsequent visible light irradiation leads to recovery of the initial micellar structure and elevated solution viscoelasticity. This dramatic, reversible variation in solution viscosity by light irradiation can be applied to cosmetics, personal care products, and device components.

A photochromic agonist for μ-opioid receptors

Opioid receptors (ORs) are widely distributed in the brain, the spinal cord, and the digestive tract and play an important role in nociception. All known ORs are G-protein-coupled receptors (GPCRs) of family A. Another well-known member of this family, rhodopsin, is activated by light through the cis/trans isomerization of a covalently bound chromophore, retinal. We now show how an OR can be combined with a synthetic azobenzene photoswitch to gain light sensitivity. Our work extends the reach of photopharmacology and outlines a general strategy for converting Family A GPCRs, which account for the majority of drug targets, into photoreceptors. Lighting up the opioid receptor: Photofentanyl-2 is a photochromic version of the well-known analgesic fentanyl. It is a potent agonist in the dark (or when illuminated with blue light) and loses activity when irradiated with UV light. It can be used to optically control the μ-opioid receptor, converting a G-protein-coupled receptor (GPCR) into a photoreceptor.