Instrumental colourant formulation

Choudhury, Asim Kumar Roy

doi:10.1533/9781782423881.117

Cited by 9 publications

(8 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Each sample was measured several times under comparable experimental conditions, varying both aerobic and anaerobic conditions. CIE 1931 coordinates ( x , y ) were calculated from emission spectra with standard equations , while using the ColorCalculator program.…”

Section: Methodsmentioning

confidence: 99%

Magnetic and Luminescent Dual Responses of Photochromic Hexaazamacrocyclic Lanthanide Complexes

et al. 2023

View full text Add to dashboard Cite

Herein, hexaazamacrocyclic ligand LN6 was employed to construct a series of photochromic rare-earth complexes, [Ln(LN6)(NO3)2](BPh4) [1-Ln, Ln = Dy, Tb, Eu, Gd, Y; LN6 = (3E,5E,10E,12E)-3,6,10,13-tetraaza-1,8(2,6)-dipyridinacyclotetradecaphane-3,5,10,12-tetraene]. The behavior of photogenerated radicals of hexaazamacrocyclic ligands was revealed for the first time. Upon 365 nm light irradiation, complexes 1-Ln exhibit photochromic behavior induced by photogenerated radicals according to EPR and UV–vis analyses. Static and dynamic magnetic studies of 1-Dy and irradiated product 1-Dy* indicate weak ferromagnetic interactions among DyIII ions and photogenerated LN6 radicals, as well as slow magnetization relaxation behavior under a 2 kOe applied field. Further fitting analyses show that the magnetization relaxation in 1-Dy* is markedly different from 1-Dy. Time-dependent fluorescence measurements reveal the characteristic luminescence quenching dynamics of lanthanide in the photochromic process. Especially for irradiated product 1-Eu*, the luminescence is almost completely quenched within 5 min with a quenching efficiency of 98.4%. The results reported here provide a prospect for the design of radical-induced photochromic lanthanide single-molecule magnets and will promote the further development of multiresponsive photomagnetic materials.

show abstract

Section: Methodsmentioning

confidence: 99%

Magnetic and Luminescent Dual Responses of Photochromic Hexaazamacrocyclic Lanthanide Complexes

et al. 2023

View full text Add to dashboard Cite

show abstract

“…The diffuse reflectance spectra of the samples were recorded with a JASCO-V650 spectrophotometer (JASCO, Vienna, Austria) with an integration sphere (ILV-724) between 250 and 800 nm; as a reference, BaSO 4 was used. The band gap of the samples was calculated via Kubelka–Munk and the first-derivative method from their reflectance spectra [ 20 ].…”

Section: Methodsmentioning

confidence: 99%

Photoinhibitive Properties of α-MoO3 on Its Composites with TiO2, ZnO, BiOI, AgBr, and Cu2O

Kedves,

Bárdos,

Ravasz

et al. 2023

Materials

View full text Add to dashboard Cite

Orthorhombic molybdenum trioxide (α-MoO3) is well known as a photocatalyst, adsorbent, and inhibitor during methyl orange photocatalytic degradation via TiO2. Therefore, besides the latter, other active photocatalysts, such as AgBr, ZnO, BiOI, and Cu2O, were assessed via the degradation of methyl orange and phenol in the presence of α-MoO3 using UV-A- and visible-light irradiation. Even though α-MoO3 could be used as a visible-light-driven photocatalyst, our results demonstrated that its presence in the reaction medium strongly inhibits the photocatalytic activity of TiO2, BiOI, Cu2O, and ZnO, while only the activity AgBr is not affected. Therefore, α-MoO3 might be an effective and stable inhibitor for photocatalytic processes to evaluate the newly explored photocatalysts. Quenching the photocatalytic reactions can offer information about the reaction mechanism. Moreover, the absence of photocatalytic inhibition suggests that besides photocatalytic processes, parallel reactions take place.

show abstract

“…This specific anticancer drug has a molecular mass of 243.086 μam and its chemical formula is presented in Figure 3. Cytarabine has a low biological stability, with the molecule undergoing a rapid deamination of the NH2 group at the level of the intestinal tract [58], and the carbohydrate part of the molecule preventing its rotation once it enters into the DNA [59]. Fresenius Kabi Oncology PLC manufactures this specific drug.…”

Section: Photochemical Degradation Of Cytarabinementioning

confidence: 99%

Advanced Photocatalytic Degradation of Cytarabine from Pharmaceutical Wastewaters

Berbentea,

Ciopec,

Duteanu

et al. 2024

Toxics

View full text Add to dashboard Cite

The need to develop advanced wastewater treatment techniques and their use has become a priority, the main goal being the efficient removal of pollutants, especially those of organic origin. This study presents the photo-degradation of a pharmaceutical wastewater containing Kabi cytarabine, using ultraviolet (UV) radiation, and a synthesized catalyst, a composite based on bismuth and iron oxides (BFO). The size of the bandgap was determined by UV spectroscopy, having a value of 2.27 eV. The specific surface was determined using the BET method, having a value of 0.7 m2 g−1. The material studied for the photo-degradation of cytarabine presents a remarkable photo-degradation efficiency of 97.9% for an initial concentration 0f 10 mg/L cytarabine Kabi when 0.15 g of material was used, during 120 min of interaction with UV radiation at 3 cm from the irradiation source. The material withstands five photo-degradation cycles with good results. At the same time, through this study, it was possible to establish that pyrimidine derivatives could be able to combat infections caused by Escherichia coli and Candida parapsilosis.

show abstract

Instrumental colourant formulation

Cited by 9 publications

References 40 publications

Magnetic and Luminescent Dual Responses of Photochromic Hexaazamacrocyclic Lanthanide Complexes

Magnetic and Luminescent Dual Responses of Photochromic Hexaazamacrocyclic Lanthanide Complexes

Photoinhibitive Properties of α-MoO3 on Its Composites with TiO2, ZnO, BiOI, AgBr, and Cu2O

Advanced Photocatalytic Degradation of Cytarabine from Pharmaceutical Wastewaters

Contact Info

Product

Resources

About