Journal of Photochemistry and Photobiology A-chemistry最新文献

{"title":"Tailoring CdTe colloidal quantum dots growth kinetics with Ag and In dopants for dazzling white-light emission","authors":"Vijayaraj Venkatachalam ,&nbsp;Sasikala Ganapathy ,&nbsp;Ilaiyaraja Perumal ,&nbsp;Priyadarshini N ,&nbsp;Santhosh Jeferson Joseph Stanley ,&nbsp;Davis Jacob Inbaraj","doi":"10.1016/j.jphotochem.2025.116492","DOIUrl":"10.1016/j.jphotochem.2025.116492","url":null,"abstract":"<div><div>CdTe quantum dots (QDs) were synthesized using an aqueous colloidal method with 3-mercaptopropionic acid (3-MPA) serving as the capping agent. Silver (Ag⁺) doping accelerates crystal growth and causes a red shift in CdTe QDs, while indium (In³⁺) doping leads to a slight blue shift due to controlled growth from free chloride ions in InCl₃ precursor, in conjunction with the 3-mercaptopropionic acid (3-MPA) capping agent. As the reflux time increases, particle size grows accordingly, leading to a progressive narrowing of the bandgap: from 2.67 to 2.15 eV for CdTe, 2.7 to 2.19 eV for In-doped CdTe (In:CdTe), and 2.37 to 1.74 eV for Ag-doped CdTe (Ag:CdTe). In³⁺ doping in CdTe QDs introduce a shallow level, while Ag⁺ doping creates both shallow and deep levels below the conduction band. Emission tuning from deep green to deep red was achieved, effectively addressing the “green gap.” The absorption spectra revealed s- and p-state saturation in CdTe and In:CdTe QDs, whereas Ag:CdTe QDs exhibited additional d-state filling. Both dopants enhanced the optical quality and photoluminescence. A white-light nanocomposite was developed using a blue-emitting organic fluorophore, green-emitting In:CdTe (1 %), and red-emitting Ag:CdTe (5 %) QDs. Optimized mixing produced white light with CIE coordinates (0.33, 0.34), a correlated color temperature (CCT) of 5181 K, and a color rendering index (CRI) of 87 demonstrating strong potential for future white LED and display applications.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"468 ","pages":"Article 116492"},"PeriodicalIF":4.1,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144068999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Time-dependent DFT-based study of bacteriochlorophyll a optical properties within the B800 part of LH2 Rhodoblastus acidophilus light-harvesting complex","authors":"E.A. Kovaleva ,&nbsp;L.V. Begunovich ,&nbsp;M.M. Korshunov","doi":"10.1016/j.jphotochem.2025.116489","DOIUrl":"10.1016/j.jphotochem.2025.116489","url":null,"abstract":"<div><div>Optical absorption of B800 part of <em>Rhodoblastus acidophilus</em> light-harvesting complex 2 (LH2) and its constituent bacteriochlorophyll <em>a</em> molecule was studied using time-dependent density functional theory-based approaches. We proved the absence of any sizable effects originating from the interaction between adjacent molecules, thus optical features of B800 LH2 part should not be attributed to the structural organization of pigments. In addition, time-dependent procedure itself was found to be crucial for the correct description of bacteriochlorophyll <em>a</em> absorption spectrum.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"468 ","pages":"Article 116489"},"PeriodicalIF":4.1,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143942604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Construction of Z-scheme BiVO4/CNTs/Cu2O ternary heterojunction with enhanced photocatalytic activity for round-the-clock antibacterial application","authors":"Rongqing Wang ,&nbsp;Jiajia Wu ,&nbsp;Jiaqi Wan ,&nbsp;Peng Wang ,&nbsp;Dun Zhang","doi":"10.1016/j.jphotochem.2025.116474","DOIUrl":"10.1016/j.jphotochem.2025.116474","url":null,"abstract":"<div><div>The construction of heterojunctions is a productive strategy in getting the separation and migration of photoinduced carriers. In this work, Z-scheme BiVO₄/CNTs/Cu₂O (BCC) system was initially constructed utilizing a straightforward wet chemical synthesis process for antibacterial purposes, and a desirable CNTs proportion was discussed. The results exposed that the BCC-3 photocatalyst with a CNTs mass proportion of 3 % had the greatest photocatalytic antibacterial property. This might be because the Z-scheme heterojunction sustains the high redox potential of photoinduced carriers, enabling the production of more active substances for antibacterial purposes. Additionally, the as-prepared composites exhibited round-the-clock antibacterial activity in the dark state and the absence of an external light source due to the presence of a small amount of Cu₂O.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"468 ","pages":"Article 116474"},"PeriodicalIF":4.1,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143942700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Efficient photocatalytic removal of drugs in aqueous dispersions by using different TiO2 based semiconductors under UV and simulated solar light irradiation","authors":"Vittorio Loddo,&nbsp;Muhammad Umair,&nbsp;Tayyaba Kanwal,&nbsp;Leonardo Palmisano,&nbsp;Marianna Bellardita","doi":"10.1016/j.jphotochem.2025.116465","DOIUrl":"10.1016/j.jphotochem.2025.116465","url":null,"abstract":"<div><div>Antibiotics are an important class of environmental pollutants. Due to their widespread use, low metabolism by organisms and persistence in the aquatic environment, they pose a serious risk to human health and environmental quality. The effective removal of pharmaceuticals and their metabolites from aqueous wastewater represents an audacious challenge for the scientific community. Heterogeneous photocatalysis has been applied as an effective technology for the removal of organic pollutants because it can induce their complete mineralization into CO₂, H₂O and inorganic species when heteroatoms are present in the degraded molecules without giving rise to the so-called secondary pollution. This study is addressed to enhance the efficiency of differently modified commercial and home-prepared TiO₂ based photocatalysts (heterojunctions with Cu₂O and WO₃, and samples doped with N were also prepared) towards some representative drugs (tetracycline, oxytetracycline and lincomycin). N-doped TiO₂ revealed high photocatalytic activity under both UV and simulated solar light irradiation, allowing not only the drugs removal but also a higher mineralization degree. O₂^•− radicals was found to be the main active species in the drugs degradation. Mechanistic investigations revealed a first order kinetics.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"468 ","pages":"Article 116465"},"PeriodicalIF":4.1,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143935763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Photodegradation of polystyrene microplastics exposed to natural sunlight","authors":"Zeynep Kilinc ,&nbsp;Gamze Yesilay ,&nbsp;Demet Cetin ,&nbsp;Zekiye Suludere ,&nbsp;Suad Rashdan ,&nbsp;Layla Hazeem ,&nbsp;Mohamed Bououdina ,&nbsp;George Z. Kyzas","doi":"10.1016/j.jphotochem.2025.116462","DOIUrl":"10.1016/j.jphotochem.2025.116462","url":null,"abstract":"<div><div>In the present study, we investigated the photodegradation of polystyrene microplastics (PS-MPs) exposed to natural sunlight over an extended period. Changes in particle size, surface charge, morphology, and chemical structure of PS-MPs were evaluated using Dynamic Light Scattering (DLS), Zeta potential measurements, Scanning Electron Microscopy (SEM), and Raman spectroscopy. Our findings revealed that exposure to natural sunlight significantly accelerates MP degradation process, resulting in pronounced fragmentation and chemical alterations compared to samples kept in dark conditions. While degradation occurs in the dark, light enhances the process. Therefore, researchers conducting studies on the toxicity of MP should include photodegradation parameter in the environmental impact assessment of MPs. Our findings highlight the importance of photodegradation in understanding the environmental fate and impact of PS-MPs. Further research can focus on the ecological implications of these chemical changes and the interactions of degraded particles with marine biota.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"468 ","pages":"Article 116462"},"PeriodicalIF":4.1,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143924848","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Three fluorescent probes based on the D-π-A configuration to detect changes in endoplasmic reticulum polarity","authors":"Jie Wang ,&nbsp;Sichen Zhang ,&nbsp;Jiale Li ,&nbsp;Aobo Sun ,&nbsp;Aixiang Ding ,&nbsp;Lei Hu ,&nbsp;Chunfei Wang ,&nbsp;Hui Wang","doi":"10.1016/j.jphotochem.2025.116480","DOIUrl":"10.1016/j.jphotochem.2025.116480","url":null,"abstract":"<div><div>Abnormal fluctuations in the polarity of the endoplasmic reticulum (ER), a critical intracellular organelle, have been closely associated with the onset and progression of various diseases. Consequently, monitoring ER polarity fluctuations is of significant practical importance for the diagnosis and treatment of these conditions. In this study, we designed and synthesized three ER-targeted polarity fluorescent probes,<!--> <strong>TCF1-TCF3</strong>, based on a D-π-A configuration, using the tricyanofuran as the parent material. These probes demonstrated a robust response to polarity changes, enabling quantitative monitoring of environmental polarity across a broad range. Furthermore,<!--> <strong>TCF1-TCF3</strong> <!-->exhibited high selectivity, excellent photostability, and minimal interference from pH variations, environmental analytes and viscosity. Cell imaging experiments revealed that <strong>TCF1</strong>-<strong>TCF3</strong> possessed low cytotoxicity, effectively target the ER, and exhibited superior imaging capabilities. Notably, the exemplary probe<!--> <strong>TCF3</strong> <!-->achieved high-quality imaging even at a low concentration of 0.5 μM. These properties enable <strong>TCF3</strong> to effectively monitor ER polarity changes induced by a variety of conditions such as DTT, tunicamycin, etc., highlighting its potential as a valuable tool for studying ER-related cellular processes.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"468 ","pages":"Article 116480"},"PeriodicalIF":4.1,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143913170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Novel antifouling and photocatalytic immobilized iron-doped cerium oxide@halloysite nanotubes decorated polyethersulfone membranes","authors":"Kgolofelo I. Malatjie ,&nbsp;Richard M. Moutloali ,&nbsp;Ajay K. Mishra ,&nbsp;Shivani B. Mishra ,&nbsp;Edward N. Nxumalo","doi":"10.1016/j.jphotochem.2025.116478","DOIUrl":"10.1016/j.jphotochem.2025.116478","url":null,"abstract":"<div><div>Novel polyethersulfone (PES) ultrafiltration (UF) membranes were prepared by incorporating different contents of iron-doped cerium oxide-halloysite nanotubes (FC@NHT) nanocomposites onto the PES membranes. The properties of the prepared nanocomposite membranes were investigated using Attenuated Total Reflectance-Fourier Transform Infrared spectroscopy (ATR-FTIR), X-ray diffraction (XRD), thermo-gravimetric analyzer (TGA) and scanning electron microscope (SEM). The results showed that iron dopped cerium oxide (FC) was indeed successfully loaded on the surface of halloysite nanotubes (HNTs). SEM characterization of FC@HNT/PES membranes showed an increase in pore sizes and microvoids which resulted in an increase in both hydrophilicity and flux due to the impact of FC@HNT. Pure water flux of 2% FC@HNT/PES (M4) was increased from 55.9 L.m⁻².h⁻¹ (0% FC@HNT/PES) to 320.4 L.m⁻².h⁻¹. The membranes also showed high antifouling properties towards humic acid (HA). This was attributed to the membranes becoming more hydrophilic upon modification. Subsequently, this reduced membrane-foulant hydrophobic interactions and made it difficult for hydrophobic contaminants to be attached onto the membranes surface. Photocatalytic ability of the modified membranes was tested against imidacloprid (IMD) insecticides. The membrane (M4) showed high photocatalytic activity of about 79% in 120 mins and 85.7% in 180 mins. The immobilization of FC onto the surface of the HNTs was for the homogenous dispersion of the nanoparticles and to mitigate the issue of agglomeration. Other remarkable functionalities are also provided by this integration. The membrane’s ability to function as system for water filtration and for the degradation of imidacloprid pesticide with high antifouling propensity is by far its most intriguing aspect of this work.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"468 ","pages":"Article 116478"},"PeriodicalIF":4.1,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144083882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Product selectivity in photo-oxygenation reaction of cyclohexenes due to orientational isomerism induced by host cavitand Octa Acid","authors":"Shipra Gupta ,&nbsp;V. Ramamurthy","doi":"10.1016/j.jphotochem.2025.116481","DOIUrl":"10.1016/j.jphotochem.2025.116481","url":null,"abstract":"<div><div>“Orientational isomerism” is a concept necessary for deeper understanding of the selective reactivities in a host–guest system. This concept has been rarely explored in the context of supramolecular host guest chemistry. We designed a model system including four cyclohexene derivatives and a water-soluble host Octa Acid (OA), with hydrophobic inner cavity. The overall length of the guest molecules (∼12 Å) was limited by manipulating the alkyl substituents at 1- and 4-positions on the cyclohexene ring. 1D ¹H/2D COSY and NOESY NMR and photo-oxygenation reaction were used to understand the observations with this model system. Specific packaging or “orientational isomerism” of each guest molecule, induced by the host OA led to specific, in one case enhanced product selectivity. With this model system we show the important role of “orientational isomerism” in explaining enhanced product selectivity in a host–guest supramolecular system.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"468 ","pages":"Article 116481"},"PeriodicalIF":4.1,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143931877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ligand–metal interactions and the Huang-Rhys factor modulating the photophysical properties of tetradentate square-planar Pt(II) complexes","authors":"Cong Zhang,&nbsp;Yu Chang,&nbsp;Xiao-Chun Hang","doi":"10.1016/j.jphotochem.2025.116479","DOIUrl":"10.1016/j.jphotochem.2025.116479","url":null,"abstract":"&lt;div&gt;&lt;div&gt;By alternating the heterocycle fragments (Het) of tetradentate ligand in square-planar Pt(II) complexes, the intramolecular ligand–metal interactions and electron-vibration coupling of phosphorescent emission are significantly regulated. Back-donation is identified as the greatest source of stability in these complexes, significantly reinforcing the metal–ligand bonds. The energy of back-donation interactions, &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msub&gt;&lt;mtext&gt;d&lt;/mtext&gt;&lt;mtext&gt;Pt&lt;/mtext&gt;&lt;/msub&gt;&lt;mo&gt;→&lt;/mo&gt;&lt;mspace&gt;&lt;/mspace&gt;&lt;msubsup&gt;&lt;mi&gt;π&lt;/mi&gt;&lt;mrow&gt;&lt;mtext&gt;Het&lt;/mtext&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mo&gt;∗&lt;/mo&gt;&lt;/mrow&gt;&lt;/msubsup&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; and &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msub&gt;&lt;mtext&gt;d&lt;/mtext&gt;&lt;mtext&gt;Pt&lt;/mtext&gt;&lt;/msub&gt;&lt;mo&gt;→&lt;/mo&gt;&lt;mspace&gt;&lt;/mspace&gt;&lt;msubsup&gt;&lt;mi&gt;π&lt;/mi&gt;&lt;mrow&gt;&lt;mtext&gt;Ph&lt;/mtext&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mo&gt;∗&lt;/mo&gt;&lt;/mrow&gt;&lt;/msubsup&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;, exhibits an inverse linear relationship with the energy level of the lowest unoccupied molecular orbital (LUMO), while the donation energy of &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msub&gt;&lt;mi&gt;π&lt;/mi&gt;&lt;mtext&gt;Cz&lt;/mtext&gt;&lt;/msub&gt;&lt;mo&gt;→&lt;/mo&gt;&lt;msubsup&gt;&lt;mtext&gt;d&lt;/mtext&gt;&lt;mrow&gt;&lt;mtext&gt;Pt&lt;/mtext&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mo&gt;∗&lt;/mo&gt;&lt;/mrow&gt;&lt;/msubsup&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; shows an inverse linear correlation with the highest occupied molecular orbital (HOMO) energy level. Additionally, back-donation amplifies the term &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;mi&gt;R&lt;/mi&gt;&lt;mi&gt;e&lt;/mi&gt;&lt;mrow&gt;&lt;mfenced&gt;&lt;mrow&gt;&lt;msubsup&gt;&lt;mi&gt;C&lt;/mi&gt;&lt;mrow&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mo&gt;∗&lt;/mo&gt;&lt;/mrow&gt;&lt;/msubsup&gt;&lt;msub&gt;&lt;mi&gt;C&lt;/mi&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/msub&gt;&lt;mrow&gt;&lt;mo&gt;〈&lt;/mo&gt;&lt;/mrow&gt;&lt;msub&gt;&lt;mi&gt;ψ&lt;/mi&gt;&lt;mi&gt;m&lt;/mi&gt;&lt;/msub&gt;&lt;mrow&gt;&lt;mo&gt;|&lt;/mo&gt;&lt;/mrow&gt;&lt;mover&gt;&lt;mi&gt;L&lt;/mi&gt;&lt;mo&gt;^&lt;/mo&gt;&lt;/mover&gt;&lt;mrow&gt;&lt;mo&gt;|&lt;/mo&gt;&lt;msub&gt;&lt;mi&gt;ψ&lt;/mi&gt;&lt;mi&gt;l&lt;/mi&gt;&lt;/msub&gt;&lt;mo&gt;〉&lt;/mo&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;/mfenced&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; in angular momentum, enhancing spin–orbit coupling (SOC) in the &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msub&gt;&lt;mi&gt;T&lt;/mi&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/msub&gt;&lt;mo&gt;→&lt;/mo&gt;&lt;msub&gt;&lt;mi&gt;S&lt;/mi&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; transition and accelerating the radiative decay rate (&lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msub&gt;&lt;mi&gt;k&lt;/mi&gt;&lt;mi&gt;r&lt;/mi&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;), with Pt-9 exhibiting the highest &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msub&gt;&lt;mi&gt;k&lt;/mi&gt;&lt;mi&gt;r&lt;/mi&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; due to its strong back-donation. Additionally, the back-donation &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msub&gt;&lt;mtext&gt;d&lt;/mtext&gt;&lt;mtext&gt;Pt&lt;/mtext&gt;&lt;/msub&gt;&lt;mo&gt;→&lt;/mo&gt;&lt;mspace&gt;&lt;/mspace&gt;&lt;msubsup&gt;&lt;mi&gt;π&lt;/mi&gt;&lt;mrow&gt;&lt;mtext&gt;Het&lt;/mtext&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mo&gt;∗&lt;/mo&gt;&lt;/mrow&gt;&lt;/msubsup&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; suppresses high-frequency stretching vibrations (&lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mtext&gt;&gt; 1300&lt;/mtext&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mtext&gt;cm&lt;/mtext&gt;&lt;/mrow&gt;&lt;mtext&gt;-1&lt;/mtext&gt;&lt;/msup&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;) involving the Het fragment and promotes low-frequency (&lt;&lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mtext&gt;200&lt;/mtext&gt;&lt;mspace&gt;&lt;/mspace&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mtext&gt;cm&lt;/mtext&gt;&lt;/mrow&gt;&lt;mtext&gt;-1&lt;/mtext&gt;&lt;/msup&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;) bending vibrations of the core backbone. Consequently, the reorganization energy (&lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msub&gt;&lt;mi&gt;λ&lt;/mi&gt;&lt;mrow&gt;&lt;mi&gt;re&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;) is reduced, while the Huang–Rhys factor (&lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mi&gt;S&lt;/mi&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;) at","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"468 ","pages":"Article 116479"},"PeriodicalIF":4.1,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143924850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mechanosynthesis of optically stable fluorescent magnetic microparticles tailored for detection of latent fingerprints","authors":"Hélio L. Barros ,&nbsp;Emilia P.T. Leitão ,&nbsp;Aladdin Mardanov ,&nbsp;Ana I. Furtado ,&nbsp;Vasco D.B. Bonifácio","doi":"10.1016/j.jphotochem.2025.116466","DOIUrl":"10.1016/j.jphotochem.2025.116466","url":null,"abstract":"<div><div>Mechanosynthesis is a powerful methodology that combines simplicity, efficiency, and sustainability, thus enabling the production of novel advanced materials displaying superior features. Solid-state fluorescent magnetic microparticles (FMMPs) were designed for enhanced detection of latent fingerprints (LFPs) on multi-coloured, porous and non-porous surfaces. FMMPs were fabricated using a mechanically assisted process using different matrices, based on silica, trisodium citrate, and chitosan, to tailor sensitivity and specificity. The dual magnetic and fluorescent properties of FMMPs greatly impact their use in forensic applications, allowing the visualization of LFPs on diverse surfaces with high contrast, and avoiding dust scattering. Moreover, due to the magnetic properties, fingerprint non-adherent FMMPs can be easily recovered and reused. By optimizing FMMPs fabrication using a solvent-free mechanosynthesis, we successfully addressed one of the major challenges associated with FMMPs production, which is fluorescence quenching caused by Fe₃O₄. Furthermore, our studies revealed the effectiveness of FMMPs in detecting LFPs under extreme conditions, including high temperature (up to 150 °C), humidity (water immersion for 20 days), aging (1 to 45 days) and sequential deposition. Thus, due to their magnetic and fluorescent performance, excellent safety profile, biodegradable nature, cost-effectiveness and sustainable production, these FMPPs offer a significant advancement in fingerprint detection technology.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"468 ","pages":"Article 116466"},"PeriodicalIF":4.1,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143903576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}