Fluorescence - Science topic

Master 2 internship proposition in nano-optic and nanofluidic. Experimental work on the study of molecule fluorescence inside a confined liquid

The pressure dependence of the R1 and R2 peaks of the fluorescence spectra of high-pressure-synthesized corundum-type Ga2O3:Cr³⁺ was measured up to 50 GPa using a diamond anvil cell pressurized at room temperature in an argon medium. The temperature dependence of the R1 and R2 peaks was measured at low temperatures under ambient pressure from 303 t...

The cutouts of graphene sheets, particularly those with a nonplanar topology, present vast opportunities for advancement. Even a slight deviation from the planar structure can lead to intriguing (chiro)optical features for helically twisted nanographenes. In this context, we introduce two regioisomeric π‐extended nanographenes that exhibit distinct...

Expanded heterohelicenes composed of alternating linearly and angularly fused multi‐resonance (MR) skeletons have gained wide interest owing to their promising narrowband emissions. Herein, a pair of sym‐ and asym‐expanded heterohelicene isomers was obtained by merging boron/oxygen (B/O)‐embedded MR triangulene and indolo[3,2,1‐jk]carbazole units v...

Despite the large volume of empirical data on the effects of magnetic fields on living organisms, there are almost no studies showing the possibility of the existence of magnetic effects in processes outside the cell or in vitro. The protein folding process in a cell can be sensitive to magnetic fields. We the first time experimentally demonstrated...

A pentafluoropropionic acid–functionalized fluorescent metal–organic framework material (UiO-66-NH2-PFPA) is prepared by a simple post-synthetic modification (PSM) strategy for the sensitive and selective detection of dichloran (DCN). The results of fluorescence experiments demonstrate that the sensitivity of UiO-66-NH2-PFPA (limit of detection, LO...

The attainment of white emission from a light-emitting electrochemical cell (LEC) is important, since it enables illumination and facile color conversion from devices that can be cost-efficient and sustainable. However, a drawback with current white LECs is that they either employ non-sustainable metals as an emitter constituent or are intrinsicall...

Enzymes catalyze reactions involved in diverse physiological, pathological, and pharmacological processes. By employing the optical probe, fluorescence imaging enables non‐invasive, real‐time detection and assessment of disease states based on enzymatic activity. However, most enzyme‐activated probes are single‐locked probes that respond to a singl...

Much can be learned about molecular aggregates by modeling their fluorescence-type spectra. In this study, we systematically describe the accuracy of various methods for simulating fluorescence-type linear spectra in a dimer system with a complex system–environment interaction, which serves as a model for various molecular aggregates, including mos...

A spherical nucleic acid (SNA, AuNPs-aptamer) into CRISPR/Cas12a system combined with poly T-template copper nanoparticles as fluorescence reporter was fabricated to establish an amplification-free sensitive method for Staphylococcus aureus (S. aureus) detection. This method, named PTCas12a, utilizes the concept that the bifunction of SNA recognize...

Electronic spectra for OThF have been recorded using fluorescence excitation and two-photon resonantly enhanced ionization techniques. Multiple vibronic bands were observed in the 340–460 nm range. Dispersed fluorescence spectra provided ground state vibrational constants and evidence of extensive vibronic state mixing at higher excitation energies...

The spectral propetties (absorption and fluorescence) of Coumarine-47 laser dye have been studied. This type of laser dye belong the Coumarine family and it has dissolved in chloroform at different concentrations (1x10-5, 5x10-5, and 1x10-4 M) at room temperature. The achieved results have been pointed out to increase in the absorption and fluoresc...

Zusammenfassung Ribosomale FISH(Fluoreszenz-in-situ-Hybridisierung)-Analysen zeigen, dass die bakterielle Vaginose (BV) ein komplexes klinisches Syndrom ist, das mehrere, nicht miteinander verwandte Infektionsprozesse mit ähnlicher Symptomatik umfasst. Die Biofilm-Vaginose ist die häufigste Ursache des BV-Syndroms, gefolgt von der kohäsiven Lactoba...

In this study, a supramolecular fluorescent material was constructed by using double‐cavity twisted cucurbit[14]uril (tQ[14]) and positively charged Astrazon Pink FG (APFG) based on the non‐covalent host‐guest interaction for the first time. The thermodynamic parameters of the APFG@tQ[14] in aqueous solution were determined by isothermal titration...

We report an investigation of the mass composition of cosmic rays with energies from 3 to 100 EeV ( 1 EeV = 10 18 eV ) using the distributions of the depth of shower maximum X max . The analysis relies on ∼ 50 , 000 events recorded by the surface detector of the Pierre Auger Observatory and a deep-learning-based reconstruction algorithm. Above ener...

Photoswitchable fluorescent materials have gained significant attention for their potential in advanced information encryption and anti‐counterfeiting applications. However, the common use of UV light to trigger the isomerization processes leads to photobleaching and poor fatigue resistance. Visible‐light‐driven fluorescent photoswitches are highly...

Correction for ‘Silver( i )–iodine cluster with efficient thermally activated delayed fluorescence and suppressed concentration quenching’ by Xiao Li et al. , Dalton Trans. , 2025, https://doi.org/10.1039/d4dt02855d.

We report on the characteristics of a microwave photon counter device based on a superconducting transmon qubit. Its design is similar to [arXiv:2307.03614], with an additional bandwidth tuning circuit that allows optimizing the device efficiency and noise. Owing to this new feature and to improvements in device fabrication, a power sensitivity of...

We present a direct lifetime measurement of the $5s5p~^1P_1$ state of strontium using time-correlated single-photon counting of laser induced fluorescence in a hot atomic beam. To achieve fast switch-off times and a high signal-to-noise ratio, we excite the strontium atoms with a femtosecond pulsed laser at $\approx$461 nm and collect the fluoresce...

Atmospheric repetitive He discharge with 10 ns current peak width working in the burst pulse regime was studied. The production of He ³S1 and ¹S0 metastable states was examined using laser- collisions- induced fluorescence and atomic absorption spectroscopy. Both methods independently reveal a significant increase of ³S1 population in the burst reg...

We have developed a high-throughput, full field-of-view (FOV) spectroscopic single-molecule fluorescence instrument, overcoming distortion issues with gratings and prisms. Our calibration techniques ensure spectral uniformity across the whole FOV, and our two-step Gaussian fit method enables better than 2 nm precision in spectral peak determination...

Plastics are widely produced due to their stability and ease of manufacturing, but many of them quickly become a waste, breaking down into microplastics and nanoplastics. While methods for the identification and characterization of plastic particles are well consolidated, the small size of nanoplastics presents challenges for their detection and an...

Light–matter coupling-induced hybrid states provide the potential to tune the emission dynamics of molecular chromophores having multilevel systems. We demonstrate the alteration of delayed fluorescence dynamics by hybrid states formation through the interaction of light with a thermally activated delayed fluorescence molecule embedded in a convent...

The genome composition of intermediate wheatgrass (IWG; Thinopyrum intermedium (Host) Barkworth and D.R. Dewey; 2n = 6x = 42) is complex and remains to be a subject of ongoing investigation. This study employed fluorescence in situ hybridization (FISH) to analyze the karyotype of Th. intermedium and its related species. With the St2-80 probe derive...

A fluorescence “turn-off-on” nanoprobe is designed by using europium-doped strontium molybdate perovskite quantum dots (Eu³⁺:SMO PQDs) for the sequential detection of hypoxanthine (Hx) and Fe³⁺. The Eu³⁺:SMO PQDs were prepared by the sol-gel method using Sr(NO3)2, (NH4)6Mo7O24.4H2O, and Eu(OCOCH3)3 as precursors. The green fluorescence of Eu³⁺:SMO...

Construction of single probes for simultaneous detection of common trivalent metal ions has attracted much attention due to higher efficiency in analysis and cost. A naphthalimide-based fluorescent probe K1 was synthesized for selective detection of Al³⁺, Cr³⁺ and Fe³⁺ ions. Fluorescence emission intensity at 534 nm of probe K1 in DMSO/H2O (9:1, v/...

Bronchial atresia (BA) and azygos lobe (AL) are rare congenital pulmonary abnormalities in pediatric patients. We herein report an infantile case of BA combined with AL that was treated with thoracoscopic surgery. The patient was an 8‐month‐old boy who was preoperatively diagnosed with BA of the right upper lobe (RUL) combined with an AL using feta...

Plasmonic structured illumination microscopy (PSIM) is a super-resolution technique that utilizes surface plasmon polaritons (SPPs) with higher frequency as the structured light; thus, it is able to break the diffraction limit with a 3–4 times resolution enhancement. However, the low efficiency of near-field fluorescence collection results in a low...

The scalable synthesis of figure‐eight π‐systems is challenging for the conventional bottom‐up approach. We have recently reported that the oxidative inner‐bond cleavage of commercially available dibenzo[g,p]chrysene efficiently furnishes a figure‐eight π‐acceptor, cyclobisbiphenylenecarbonyl (CBBC), in large quantity. Furthermore, its donor–accept...

Achieving high circularly polarized electroluminescence (CP‐EL) performance in organic light‐emitting diodes (OLEDs) remains a significant challenge. In this study, chiral nematic liquid crystal polymers (LCPs) are co‐assembled as chiral fluorescent materials by doping 1 wt% chiral binaphthyl‐based R/S‐D inducers into a LCP (P‐PyP), displaying blue...

Fluorescence endoscopy technology utilizes a light source of a specific wavelength to excite the fluorescence signals of biological tissues. This capability is extremely valuable for the early detection and precise diagnosis of pathological changes. Identifying a suitable experimental approach and metric for objectively and quantitatively assessing...

The genome replication of SARS-CoV-2, the causative agent of COVID-19, involves a multi-subunit replication complex consisting of non-structural proteins (nsps) 12, 7 and 8. While the structure of this complex is known, the dynamic behavior of the subunits interacting with RNA is missing. Here we report a single-molecule protein-induced fluorescenc...

A novel coumarin-based fluorescent probe LY was designed and synthesized in this work. LY could selectively recognize Cu²⁺ via fluorescence quenching at 522 nm in a DMSO/H2O solution. The recognition process experienced minimal interference from other common cations. The binding ratio of LY to Cu²⁺ was found to be 1:1, while the detection limit was...

KP2749 is a new anticancer agent that releases two independent cytotoxic agents upon reduction: oxaliplatin and the fluorescent EGFR inhibitor KP2187.

Diffuse large B-cell lymphoma (DLBCL) is a highly aggressive diffuse malignant proliferative disease of the lymphatic system. Patients usually present with progressive lymph node enlargement and/or extra-lymph node lesions and require early treatment upon diagnosis. Most of the patients are in stage III or IV at the time of diagnosis and about 40%...

Correction for ‘Selective binding and fluorescence sensing of Zn( ii )/Cd( ii ) using macrocyclic tetra-amines with different fluorophores: insights into the design of selective chemosensors for transition metals’ by Giammarco Maria Romano et al. , Dalton Trans. , 2025, https://doi.org/10.1039/d4dt02415j.

The paper describes the invention of the fluorescence method of phytochrome investigations in vivo by our group and analyses the results obtained with its applications.

The photo responsive squaraine dye (PSq) interacts with BSA protein in two distinct ways: noncovalently, yielding a robust NIR emission, and covalently, resulting in a weak green emission. Upon photoirradiation, the green emission of the covalently bound fluorophore is activated via photocleavage of the attached group whereas the NIR emission of th...

Incoherent Diffraction Imaging - IDI - is a diffraction-based imaging technique that has been recently proposed to exploit the partial coherence of incoherently scattered light to retrieve structural information from the scattering centers. Similar to the stellar intensity interferometry of Hanbury Brown and Twiss, the signal builds up on the secon...

Formation of Pdots and Pdot-siRNA and delivery mechanism to the cell. (A) Synthesis of Pdots and binding with siRNA around the Pdots. (B) Pdot-siRNA nanoplatform undergoes cellular uptake and siRNA delivery to target transcripts.

Background Neurodegenerative diseases, such as Alzheimer’s disease(AD), have become more prevalent in aging societies. Therefore, it is important to develop a blood‐based measurement system to diagnose early‐stage AD. However, such AD‐related biomarkers in blood exist at extremely low levels and are difficult to detect precisely and reproducibly....

Minimally invasive anatomical liver resection is increasingly feasible due to the improved availability of preoperative 3-dimensional (3D) reconstruction of the liver as well as endoscopic cameras with near-infrared indocyanine green fluorescence overlay visualization. In this article, we share our experience and perceived benefits of anatomical li...

Hexabrominated meso‐(p‐tolyl) 3‐pyrrolyl BODIPY was regioselectively synthesized by treating meso‐(p‐tolyl) 3‐pyrrolyl BODIPY with eight equivalents of Br2 in CH2Cl2 under inert atmosphere at room temperature. Five different 5,6,7,9,10,11‐hexaarylated meso‐(p‐tolyl) 3‐pyrrolyl BODIPYs were synthesized by treating 5,6,7,9,10,11‐hexabromo meso‐(p‐tol...

This article analyzes the prospects for the appearance of paper-based sensors on the sensor market. It is concluded that paper-based sensors are not a fantasy but a reality. It is shown that paper has properties that make it possible to develop a wide variety of paper-based sensors, such as SERS, colorimetric, fluorescent, conductometric, capacitiv...

A fluorescent triazine-based polymer enables selective hypochlorite detection in semi-aqueous environments, demonstrated with test paper assays and validated in real samples, highlighting its potential for practical applications.

Super-resolution optical fluctuation imaging (SOFI) rapidly generates super-resolution images by analyzing fluorescence intensity fluctuations. However, fluorophores for high-order SOFI applications are very rare. Here, we report ultrasmall semiconducting polymer dots (Pdots) to achieve high-order SOFI at single-particle and cellular levels. The ul...

To establish a rapid and sensitive detection method for the porcine reproductive and respiratory syndrome virus (PRRSV), gene-specific primers and a TaqMan probe were designed based on the M gene of PRRSV, and a new stable fully pre-mixed reverse transcription real-time fluorescence quantitative PCR (RT-qPCR) reaction mixture was developed. A simpl...

The nematode C. elegans is a well-studied model organism for characterizing the structure, connectivity, and function of a complete nervous system. Recent technical breakthroughs in 3D light microscopy and fluorescent protein tagging of individual neurons have brought us closer to capturing the neural dynamics of the worm at whole-brain resolution....

The Wigner function was introduced as an attempt to describe quantum mechanical fields with the tools inherited from classical statistical mechanics. In particular, it is widely used to describe properties of radiation fields. In fact, a useful way to distinguish between classical and nonclassical states of light is to ask whether their Wigner func...

Three BINOL‐based unsymmetric chiral dialdehydes, (S)‐4, (S)‐5, and (S)‐6, each containing a salicylaldehyde moiety and an ortho‐, meta‐ or para‐substituted benzaldehyde unit, are synthesized and used to react with the enantiomers of an unsymmetric chiral diamine, lysine. These reactions represent the first examples of regioselective as well as ena...

Through‐space charge‐transfer (TSCT) thermally‐activated delayed fluorescence (TADF) emitters have been extensively explored for organic light‐emitting diodes (OLEDs), but their low radiative decay rates (kr,s) have remained a formidable obstacle to enhancement of luminescent efficiency (ФPL) and suppression of efficiency roll‐off of the OLED. Here...

Developing donor-acceptor [n]cycloparaphenylenes (D-A [n]CPPs) with multiple emissions from different emissive states remains challenging yet crucial for achieving white-light emission in single-molecule. Here, we report our explorations into acceptor engineering of quinone-based D-A [10]CPPs (Nq/Aq/Tq[10]CPPs) via a post-lateral annulation using D...

A series of benzothieno[3,2‐b]benzothiophene S‐oxides has been efficiently synthesized via one‐ or two‐step selective oxidation of benzothieno[3,2‐b]benzothiophene (BTBT). These BTBT S‐oxides form highly ordered structures that display optical anisotropy, are thermally stable up to temperatures above 210 °C, and do not show phase transitions. They...

The identification of ClO⁻ and iron ions in water medium is a difficult task and has been one of the hot issues in analytical chemistry. For this objective, we synthesized carbon nanoparticles (CNPs) through a solvothermal reaction between 1, 3, 5-trimesic acid and o-phenylenediamine, which served as a sequential fluorescent probe for ClO⁻ and Fe²⁺...

Fluorescent carbon dots, especially red/near-infrared-emitting CDs, are becoming increasingly important in the field of biomedicine. This article reviews the synthesis, fluorescence mechanisms, and biological applications of R/NIR-CDs, emphasizing the importance of carbon source and solvent selection in controlling their optical properties. The for...

Angiomatoid fibrous histiocytoma (AFH) is a rare intermediate tumor that is often difficult to diagnose radiologically and pathologically. Herein, we report a case of AFH in the knee that was initially misdiagnosed as a cystic lesion. The tumor was first identified eight years earlier during the patient’s initial visit, when plain magnetic resonanc...

The Pierre Auger Observatory stands as the largest detector for ultra-high-energy (UHE) cosmic rays. The Observatory is also sensitive to UHE photons and neutrinos that can be produced along with UHE cosmic rays or in top-down processes, such as the decay of dark matter particles. The search for these neutral particles relies on the hybrid measurem...

We obtain time-resolved spectra of spontaneous emission and resonance fluorescence of a single multilevel emitter where two antiparallel transitions interfere and cause quantum beats. After rising as a single broad peak, the spontaneous emission spectrum turns into a doublet of subnatural peaks and then fades for long times. For strong field resona...