ChemPhotoChem最新文献

A pyrene base luminophore was designed and synthesised under ambient conditions using [4+2] annulation. The synthesised probe PYINDP exhibits good optical properties and emits greenish blue, with high colour purity in solid, solution, and thin film phases. In solution, the CIE coordinates were found to be (0.20, 0.48), and for an aggregated state emitting deep green colour, the CIE values are (0.27, 0.65). Room temperature phosphorescence (RTP) is generated by the luminophore PYINDP, owing to the ISC process. Moreover, the emitter demonstrated an excellent limit of detection values in detecting nitroaromatics (NACs). Bio-imaging studies on HEK, A549 cell lines were successfully carried out to verify the staining capability of PYINDP in biological systems.

Defect-enriched mesoporous CuO nanosheets (NSs) were constructed to investigate the cooperative photo-Fenton and photothermal-Fenton catalysis on degradation of fluoroquinolones (FQ) antibiotics. The oxygen vacancies provide abundant active sites to bind the substrates and inhibit charge recombination, by all means to enhance Fenton-like activity. Two disparate spectral selective functions of photoexcitation and photothermal conversion were achieved on CuO NS, which to promote the Fenton activity synergistically. Visible light induced photoexcitation to facilitate the generation of Cu⁺ and ⋅OH, while near-infrared light converted into heat to promote charge separation and accelerate medium transport. Ultimately, as a unitary catalyst system, the CuO NS integrated the Lewis acid catalysis, Fenton-like catalysis and photothermal catalysis that rapidly and sustainably degraded antibiotics under near-neutral conditions.

Covalent organic frameworks (COFs), newly developed materials, exhibit considerable promise in the field of catalysis. COFs exhibit captivating catalytic characteristics, including thermal and chemical stability, customizable porosities, and the ability to place active sites flexibly with tunable functions. To establish a connection between structure and activity, this paper provides a thorough justification of the planned creation of covalent organic frameworks for photocatalysis, encompassing H₂ production, carbon dioxide reduction, pollutants reduction and transformation of organic substances. We have investigated the catalytic sites that are active within covalent organic frameworks, encompassing the metals, molecular catalysts, and catalyst with single atom (SACs); the reactive skeleton/linkages; and the reactive pendant groups. This exploration aims to establish the benefits of using COF-based catalysts compared to traditional catalysts. Despite the new advantages, numerous difficulties have also been noted with regard to the future. The objective of this review is to make it easier to design COF-based composite materials for practical uses.

Two π-extended derivatives of boron-dipyrromethene (BODIPY) – unsymmetrical benzo[b]-fused BODIPY 1 and symmetrical naptho[b]-fused BODIPY 2 – were synthesized. Spectroscopic and photophysical properties of the synthesized fluorescent dyes were investigated in various organic media. Both BODIPY 1 and BODIPY 2 distinguished by bathochromically shifted absorption and emission bands compared to their non-fused derivatives, while possessing green (526–543 nm) and red (664–708 nm) absorbance and fluorescence, respectively. Spectral characteristics of the investigated fluorescent dyes were found to be weakly depended on solvent polarizability in case of BODIPY 1 and greatly influenced by both solvent polarizability and dipolarity in case of BODIPY 2. Quantum chemical calculations were used to clarify the relationships between geometry/electronic structure and spectral properties/solvatochromic behavior of BODIPY 1 and BODIPY 2.

Constructing a catalyst capable of reducing CO₂ through photoreduction in aqueous environments presents a significant challenge. In this study, we present the synthesis of BiVO₄@NiCo₂O₃ heterojunction using a straightforward hydrothermal method for CO₂ photoreduction. The sample with the optimal loading ratio demonstrates a CO generation rate of 7.202 μmol ⋅ g⁻¹ ⋅ h⁻¹, which is twice that of pure BiVO₄ (3.626 μmol ⋅ g⁻¹ ⋅ h⁻¹) and 1.5 times that of pure NiCo₂O₃ (4.726 μmol ⋅ g⁻¹ ⋅ h⁻¹). Analysis using XPS and EPR techniques suggests that electron transfer at the interface of the heterojunction facilitates the separation of photogenerated charge carriers, thereby enhancing the efficiency of the photocatalytic process. This investigation offers a viable approach for developing photocatalysts for CO₂ reduction in aqueous environments.