Article
Materials Science, Ceramics
R. S. Silva, D. L. Ferreira, E. M. Alves, T. A. Maia, A. S. Silva, E. V. Guimaraes, G. A. Azevedo, N. S. Camilo, A. A. Andrade
Summary: In this study, the optical properties of borosilicate glass matrix doped with Nd3+ ions and incorporated with CsPbI3 nanocrystals were investigated using the fusion method. The energy transfer process from CsPbI3 nanocrystals to Nd3+ ions was analyzed through optical absorption and photoluminescence spectra overlap. The nanocrystals in the borosilicate glass matrix had an average size of 9.5 nm and exhibited an emission band at 888 nm (transition 4F3/2 -> 4I9/2) attributed to the Nd3+ ion.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Chemistry, Multidisciplinary
Guilherme Almeida, Lara van der Poll, Wiel H. Evers, Emma Szoboszlai, Sander J. W. Vonk, Freddy T. Rabouw, Arjan J. Houtepen
Summary: This study reports on the size-dependent optical properties and biexciton lifetimes of core-only InP colloidal quantum dots. The novel synthesis method allows for the production of a range of monodisperse InP quantum dots with narrow absorption and emission linewidths and high quantum yields.
Article
Chemistry, Physical
N. X. Ca, N. D. Vinh, S. Bharti, P. M. Tan, N. T. Hien, V. X. Hoa, Y. Peng, P. V. Do
Summary: Ce3+ and Tb3+ co-doped ZnS quantum dots were synthesized through a simple wet chemical method. The effect of Tb3+ concentration on the structural and optical properties of the co-doped QDs was thoroughly investigated. The energy transfer process was enhanced by the doping with Ce3+ and was dominated by dipole-dipole interaction. The co-doped QDs exhibited long decay times and potential applications in photovoltaic, photocatalysis, and biosensing.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Optics
Beom Soo Joo, Minseon Gu, Jeehwan Han, Namsik Jung, Seungchul Kim, Dong-Wook Park, Moonsup Han
Summary: Controlling the emission wavelength of silicon quantum dots by quantum confinement or size effects has a limitation of approximately 600 nm or above. Recent studies have focused on reproducing the entire visible range from blue to red by surface functionalization of Si QDs. This study investigates the emission mechanism of alkyl- and amine-passivated Si QDs and provides insight into the debated luminescence mechanism of surface-functionalized Si QDs through experimental analysis and theoretical calculations.
JOURNAL OF LUMINESCENCE
(2021)
Article
Chemistry, Multidisciplinary
Yan B. Vogel, Maarten Stam, Jence T. Mulder, Arjan J. Houtepen
Summary: This article presents a strategy to actively engineer long-range charge transport in colloidal quantum dot assemblies by introducing ligand functionalities. The use of electronically coupled redox ligands enables a self-exchange chain reaction and facilitates long-range charge transport across the film. The different modes of charge transport in these assemblies and their manipulation through modulation of the Fermi level and redox ligand coverage are identified.
Article
Chemistry, Multidisciplinary
Xuwen Gao, Guocan Jiang, Cunyuan Gao, Anatol Prudnikau, Rene Huebner, Jinhua Zhan, Guizheng Zou, Alexander Eychmueller, Bin Cai
Summary: This study presents the design of quantum dot (QD) aerogels as novel Electrochemiluminescence (ECL) luminophores, enabling highly efficient fluorescence emission. The mechanism of ECL generation is verified through the experiment of mixed QD aerogels. This work contributes to the fundamental understanding of ECL and provides useful insights for designing next-generation QD-based devices.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Xiaowei Yu, Kaikai Liu, Bolun Wang, Hongyue Zhang, Yuanyuan Qi, Jihong Yu
Summary: This study successfully developed a time-dependent polychrome stereoscopic luminescence system by designing a luminescence system with adjustable afterglow lifetime and multicolor quantum dots. The system allows tunable afterglow emission and has been applied in time-space division multiplexing, expanding the information capacity.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Indra Narayan Chakraborty, Pradyut Roy, Pramod P. P. Pillai
Summary: The effectiveness of quantum dots (QDs) in photocatalyzing organic reactions is explored in this study. The use of QDs in efficiently catalyzing olefination reactions under visible-light irradiation at room temperature is demonstrated. Spectroscopic and electrochemical studies provide insights on the charge transfer mechanism involved in QD-photocatalyzed olefination.
Article
Chemistry, Physical
Jiajia Ning, Yuan Xiong, Stephen Kershaw, Andrey L. Rogach
Summary: The most efficient way to improve the stability and optical properties of nanocrystals is to grow shell around their cores. Different growth modes of the ZnS shell on ZnSe nanorods were observed depending on the crystal structure of the ZnSe core, leading to differences in photoluminescence quantum yield.
CHEMISTRY OF MATERIALS
(2021)
Article
Biochemical Research Methods
Daniil D. Drozd, Nadezhda A. Byzova, Pavel S. Pidenko, Daria V. Tsyupka, Pavel D. Strokin, Olga A. Goryacheva, Anatoly V. Zherdev, Irina Yu. Goryacheva, Boris B. Dzantiev
Summary: A new bioanalytical labeling system based on alloyed quantum dots' photoluminescence quenching caused by an enzymatic reaction has been developed and tested. The use of alloyed luminescent QDs provides high sensitivity and the ability to vary the detecting time, leading to improved assay sensitivity.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2022)
Article
Physics, Multidisciplinary
Lujing Jiang, Kang Lan, Zhenyu Lin, Yanhui Zhang
Summary: The study investigates the electron transfer properties of a double quantum dot system in a fluctuating environment using the innovative method of the additional Bloch vector. It is found that environmental noises in transverse and longitudinal directions play different roles in the dynamical evolution of the open quantum systems. The study provides insights into the impact of noise on the stability and behavior of quantum systems, as well as their implications on single electron transfer theory in the short-time limit.
Article
Chemistry, Physical
Tsumugi Miyashita, Paulina Jaimes, Tianquan Lian, Ming Lee Tang, Zihao Xu
Summary: The study investigates the impact of ligands on photon upconversion and finds that long-chain ligands decrease the efficiency of energy transfer, while short-chain ligands enable direct energy transfer and enhance the upconversion quantum yield.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Analytical
Shuangtian Dong, Dongyang Wang, Xuwen Gao, Li Fu, Jingna Jia, Yuqi Xu, Bin Zhang, Guizheng Zou
Summary: This study proposes a method to achieve chemiluminescence with different wavelengths and intensities by adjusting triggering agents, which shows promising potential for applications in immunoassays and other fields.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Andriy Horechyy, Olha Aftenieva, Mona Mittal, Sunita Sanwaria, Rajiv K. Srivastava, Tobias A. F. Koenig, Andreas Fery, Sajan Singh, Labeesh Kumar, Bhanu Nandan
Summary: In this study, well-defined core-satellite nanostructures consisting of block copolymer micelles with a single gold nanoparticle in the core and multiple photoluminescent cadmium selenide quantum dots attached to the micelle's coronal chains were fabricated and characterized. The use of different alcoholic solvents during the development of these nanostructures allowed for solvent-selective swelling, which tuned the distance between the quantum dots and gold nanoparticles and modulated their Förster resonance energy transfer behavior. These core-satellite nanostructures hold promising potential in photonics, optoelectronics, and sensors that utilize the Förster resonance energy transfer process.
Article
Chemistry, Physical
Yongmin Duan, Panpan Li, Lei Lei, Feifei Huang, Ying Tian, Shiqing Xu, Junjie Zhang
Summary: In this study, polychromatic self-crystallized CsPb(Cl/Br/I)(3) perovskite nanocrystalline (PN) borosilicate glass was prepared using the high-temperature melting method. Mechanical ball milling was then used to induce microstructure changes in the PN glass, resulting in the secondary crystallization of the nanocrystals. As a result, the photoluminescence quantum yield (PLQY) was significantly enhanced, and the prepared PN glass exhibited good thermal stability. Furthermore, by embedding the PN glass powder in a flexible matrix, multicolor luminescent flexible films were successfully created, suggesting potential applications in the flexible display field.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Applied
Hussein A. Younus, Ibrahim Yildiz, Nazir Ahmad, Hemdan S. Mohamed, Gomaa Khabiri, Shiguo Zhang, Francis Verpoort, Piao Liu, Yan Zhang
Summary: This study reports two half-sandwich ruthenium complexes based on the macrocyclic 1,4,7-triazacyclononane ligand, showing different catalytic activities and stabilities in water oxidation. One complex retained high stability and activity, while the other underwent deactivation through ligand dissociation.
APPLIED ORGANOMETALLIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Ibrahim Yildiz, Banu Sizirici Yildiz
Summary: This study investigates the mechanism of HDAC 10 catalysis and the roles of active site residues in the deacetylation process using computational models and crystal structures.
Article
Chemistry, Multidisciplinary
Leonardo Andreoni, Giovanni Mariano Beneventi, Gabriele Giovanardi, Gianpiero Cera, Alberto Credi, Arturo Arduini, Andrea Secchi, Serena Silvi
Summary: We synthesized and characterized a dansyl calix[6]arene derivative and its pseudorotaxane complex, and found that it has remarkable complexation ability. The dansyl moieties in the derivative can signal the state of the system through fluorescence, be reversibly protonated to modulate the complexation abilities, and participate in photoinduced electron transfer processes to tune the stability of the complex.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Organic
Damian E. Yerien, Jessica Groppi, Al Postigo, Alberto Credi, Romina S. Conde, Massimo Baroncini, Sebastian Barata-Vallejo
Summary: Modified crown ethers are essential in supramolecular chemistry, and have applications in various fields such as phase transfer catalysis, metal extraction, smart materials, and molecular machines. In this study, a one-pot highly selective photocatalytic fluoroalkylation protocol was developed for the mono-functionalization of benzo substituted crown ethers. With broad applicability and high yield, this method allows for the late-stage functionalization of various aromatic crown ethers, including those involved in mechanically interlocked molecules.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Lavinia A. Trifoi, Nicholas P. Dogantzis, Gregory K. Hodgson, Pedro D. Ortiz, Sumaiya A. Soha, Costin N. Antonescu, Roberto J. Botelho, R. Stephen Wylie, Stefania Impellizzeri
Summary: We synthesized a fluorogenic methylated dihydrofluorescein derivative that can be activated and fluoresce under visible-light illumination. This study provides a simple optical method to simultaneously activate and excite fluorescence using a single wavelength, and the fluorescence can be further enhanced through metal-enhanced fluorescence.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Review
Biochemistry & Molecular Biology
Yang Zhang, Yeting Zheng, Andrea Tomassini, Ambarish Kumar Singh, Francisco M. Raymo
Summary: PALM uses fluorescence photoactivation and single-molecule localization to overcome optical diffraction and achieve nanoscale spatial resolution in imaging biological samples. Synthetic modifications of the BODIPY chromophore allow for photoactivation and precise localization of single molecules. In combination with targeting ligands, photoactivatable BODIPYs can label subcellular components and enable sub-diffraction imaging of live cells using PALM, making them valuable probes for bioimaging applications.
Article
Chemistry, Multidisciplinary
Ibrahim Yildiz
Summary: l-Aspartateoxidase (Laspo) is an enzyme responsible for oxidizing l-aspartate into iminoaspartate using flavin as a cofactor. The enzyme has a similar fold and catalytic residues to succinate dehydrogenase and fumarate reductase. Based on kinetic and structural data, it is proposed that the enzyme catalyzes the oxidation of l-aspartate through a mechanism similar to amino acid oxidases. Computational models were formulated in this study to investigate the hydride-transfer mechanism, and the calculations suggest a stepwise mechanism rather than a concerted one.
Article
Chemistry, Multidisciplinary
Stefano Corra, Massimiliano Curcio, Alberto Credi
Summary: Accurate control of long-range motion at the molecular scale is crucial for energy storage and bionanotechnology. Recent developments have focused on directional operation of man-made molecular motors away from thermal equilibrium. This paper provides a critical assessment of light-driven artificial molecular motors, discussing design criteria and future advances in this research area.
Article
Chemistry, Physical
Ibrahim Yildiz
Summary: This study elucidates the oxidation mechanism of D-arginine to iminoarginine using computational models based on the crystal structure of the enzyme complexed with iminoarginine. The calculations reveal that Arg222, Arg305, Tyr249, Glu87, His48, and two active site water molecules play crucial roles in binding and catalysis. The deprotonation step precedes the hydride transfer step, and active site water molecule(s) may be involved in the deprotonation process.
Article
Chemistry, Multidisciplinary
Leonardo Andreoni, Federica Cester Bonati, Jessica Groppi, Davide Balestri, Gianpiero Cera, Alberto Credi, Andrea Secchi, Serena Silvi
Summary: We synthesized and characterized [2]rotaxanes based on a stilbazolium dye and a calix[6]arene macrocycle. Due to the non-symmetry of both components, two orientational isomers were obtained. The two isomers exhibited distinct photophysical and photochemical properties in solution and solid state, surpassing the unencapsulated dye.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Nina Bukhtiiarova, Alberto Credi, Stefano Corra
Summary: In this study, we designed a rotaxane molecular shuttle that can precisely tune the distribution of the ring among two weak recognition sites by changing solvent polarity or the nature of counteranions. The shuttling of the ring can also be toggled by acid-base stimuli, providing a paradigmatic approach for sensing environmental changes and transducing them into a coconformational response.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Nina Bukhtiiarova, Alberto Credi, Stefano Corra
Summary: This is a rotaxane molecular shuttle that uses triazolium and tertiary ammonium units as weak recognition sites for the ring. The distribution of the ring among the two sites can be precisely tuned by changing the solvent polarity or the nature of the counteranions, and the shuttling of the ring between the two stations can be toggled by acid-base stimuli.
CHEMICAL COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Yohanna Haile Fseha, Banu Sizirici, Ibrahim Yildiz
Summary: This study investigates the potential of biochar derived from date palm waste for adsorbing inorganic contaminants in groundwater. It provides insight into the optimum conditions and the adsorption capacities of different ions. The study also demonstrates the ability of the biochar to reduce and maintain physiochemical parameters within acceptable levels for drinking water.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Ibrahim Yildiz, Banu Sizirici Yildiz
Summary: Notum is a crucial enzyme in the Wnt signaling pathway, and its inhibition has therapeutic effects on diseases such as osteoporosis, cancer, and Alzheimer's disease. This study focuses on the proposed irreversible inhibition mechanism using esters of 4-(indolin-1-yl)-4-oxobutanoic acid. The computational analysis provides insights into the transesterification and hydrolysis steps, as well as the role of active-site residues.
Article
Materials Science, Multidisciplinary
Lavinia A. Trifoi, Gregory K. Hodgson, Nicholas P. Dogantzis, Sumaiya A. Soha, Roya M. Dayam, Costin N. Antonescu, Roberto J. Botelho, R. Stephen Wylie, Stefania Impellizzeri
Summary: The design and synthesis of a microporous construct based on the entrapment of a fluorescence dye in a zinc 2-methylimidazolate (ZIF-8) metal-organic framework (MOF) is described. The resulting supramolecular assemblies show enhanced photophysical properties and increased photostability. The encapsulation of the dye in the MOF framework can be modeled using density-functional tight-binding method. Additionally, the dye@MOF composite can be internalized by mammalian macrophage cells and transported to lysosomes without affecting cell viability. This protocol has the potential to be a general strategy for targeted bioimaging or theranostic applications.
MATERIALS ADVANCES
(2022)