Article
Chemistry, Physical
Nan Zhang, Lu Liu, Haixia Chang, Ke Liu, Taihong Liu, Liping Ding, Yu Fang
Summary: Versatile coupling theories have been developed to explain the unusual aggregation phenomena of multipolar chromophores. This study investigates the diverse excitonic couplings and tunability of a quadrupolar squaraine dye protonated by trifluoroacetic acid in different solvation media. Subtle changes in the solvent and ion pair lead to significant variations in the aggregation and optical properties of the donor-acceptor-donor (D-A-D)-type SQC6.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Chen Lu, Ning Li, Ying Jin, Ying Sun, Jingang Wang
Summary: In this work, the intermolecular interactions and charge transfer properties of the BDBT-TCNB co-crystal were investigated. The results showed that the co-crystal exhibited excellent two-photon absorption properties due to the strong pi-pi bonds, hydrogen bonds, and S-N bonds. The study also revealed that there was a strong interaction force along the stacking direction, and the dominant charge transfer mode was cross-space charge transfer.
Article
Chemistry, Applied
Qian Zhou, Huitian Du, Zhen Chen, Yuan Yu, Junfeng Ren, Shenghao Han, Jihui Fan, Zhiyong Pang
Summary: This study successfully prepared cocrystals of acridine and 1,2,4,5-tetracyano-benzene by self-assembly, showing novel luminescent properties. The findings may have important implications for the design and applications of nonlinear optical materials.
Article
Chemistry, Physical
Francesco Bertocchi, Andrea Delledonne, Guillem Vargas-Nadal, Francesca Terenziani, Anna Painelli, Cristina Sissa
Summary: Aggregates of cyanine dyes are investigated for their tunable spectral properties in this study. The study presents a joint experimental and theoretical analysis of different types of aggregates formed by a family of cyanine dyes. The analysis rationalizes the optical spectra using an essential-state model that takes into account intermolecular interactions, molecular polarizability, and vibronic coupling.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Applied
Carlos Benitez-Martin, Beatriz Donoso, Ivan Torres-Moya, Jesus Herrera, Angel Diaz-Ortiz, Francisco Najera, Pilar Prieto, Ezequiel Perez-Inestrosa
Summary: Pyrazine-decorated benzotriazole cores allow the orthogonal combination of two dipolar systems within a single molecule. The photophysical features of these derivatives showed remarkable differences depending on the substitution in the pyrazine ring of the benzotriazole core. Furthermore, these compounds exhibited good two-photon absorption properties, and TD-DFT calculations supported the experimental observations.
Article
Materials Science, Multidisciplinary
Davide Giavazzi, Marvin F. Schumacher, Luca Grisanti, Mattia Anzola, Francesco Di Maiolo, Jennifer Zablocki, Arne Luetzen, Manuela Schiek, Anna Painelli
Summary: This study provides a combined experimental and theoretical investigation of a new type of chiral aggregates with structure-correlated excitonic properties in the visible to near-infrared spectral range. It is found that different alkyl chain lengths can lead to different aggregation scenarios and spectroscopic features, including simultaneous blue- and red-shifted signatures, as well as dominant blue-shifted signatures. The calculation of circular dichroism including intermolecular charge transfer is explicitly expressed for the first time.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Biochemistry & Molecular Biology
Morgane Rosendale, Jonathan Daniel, Frederic Castet, Paolo Pagano, Jean-Baptiste Verlhac, Mireille Blanchard-Desce
Summary: The study explores the relationship between dye structure and FONs 2P absorption response, fluorescence, and stealthiness. It shows that increasing the strength of the donor end-groups or core acceptor in the quadrupolar dye structure can tune optical properties, red-shift emission, and 2P absorption spectra while decreasing fluorescence quantum yield. The FONs exhibit non-toxicity, stealth behavior, and minimal non-specific interactions with cell membranes, attributed to their hydrophobic character and rigidity.
Article
Chemistry, Multidisciplinary
Robin Bernhardt, Marick Manrho, Jennifer Zablocki, Lukas Rieland, Arne Lutzen, Manuela Schiek, Klaus Meerholz, Jingyi Zhu, Thomas L. C. Jansen, Jasper Knoester, Paul H. M. van Loosdrecht
Summary: By studying aggregated n-butyl anilino squaraines, we found that structural disorder affects the generation of red- and blue-shifted peaks, as well as the absence of photoluminescence in the aggregates.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Marie Auvray, Frederic Bolze, Delphine Naud-Martin, Matthieu Poulain, Margaux Bossuat, Gilles Clavier, Florence Mahuteau-Betzer
Summary: In this study, a series of biocompatible quadrupolar dyes were designed and synthesized for potential application in two-photon microscopy. Through the investigation of their photophysical properties and live-cell two-photon microscopy experiments, it was found that three of these dyes exhibited high potential for imaging with high brightness and contrast.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Brunella Bardi, Anna Painelli, Monica Panigati, Pierluigi Mercandelli, Francesca Terenziani
Summary: A computational study has rationalized the different phosphorescence colors of two highly emitting crystal polymorphs of a dinuclear Re(I) complex. The electrostatic interactions between the charge distributions on neighboring molecules inside the crystal are responsible for the different stabilization of the emitting triplet state due to the different molecular packing. These self-consistent effects play a major role in the phosphorescence of crystals made of polar and polarizable molecular units, offering a powerful handle to tune the luminescence wavelength in the solid state through supramolecular engineering.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Chemistry, Applied
Antonio Dominguez-Alfaro, Vania F. Pais, David B. Guzman-Rios, Daniel Collado, Francisco Najera, Ezequiel Perez-Inestrosa, Uwe Pischel
Summary: A bichromophoric dyad composed of a Prodan-derived moiety and a BODIPY dye was synthesized and characterized for multiphoton fluorescence microscopy of N13 microglial cells. The efficient energy transfer of the dyad was observed independent of solvent polarity, but in polar media, photoinduced electron transfer competed with energy transfer. The Prodan-derived chromophore also exhibited significant two-photon absorption, making it suitable as a sensitization antenna for BODIPY fluorescence.
Article
Materials Science, Multidisciplinary
Tianchen Yu, Zhongguo Li, Wenfa Zhou, Xingzhi Wu, Jidong Jia, Ruipeng Niu, Jianfeng Ge, Junyi Yang, Yinglin Song
Summary: This study synthesized two near-infrared hemicyanine compounds and investigated their third-order nonlinear optical absorption properties, revealing that one compound had a stronger NLO response than the other, which was attributed to the difference in auxochrome. Additionally, femtosecond transient absorption spectroscopy results showed variations in excited-state lifetime caused by different auxochromes.
Article
Chemistry, Multidisciplinary
Ruizhe Chen, Yonghui Pan, Zizi Wu, Mingxuan Jia, Xiaofei Miao, Xiaomei Lu, Quli Fan, Wenbo Hu
Summary: Developing photostable two-photon dyes with high brightness and negligible photocytotoxicity is crucial but challenging for fluorescence imaging.
CHEMISTRY-AN ASIAN JOURNAL
(2023)
Article
Chemistry, Physical
Dawid Grabarek, Tadeusz Andruniow
Summary: The spectral properties of fluorescent proteins are influenced by their protein environment. By studying the interactions between the chromophore and the environment, researchers have found that modifying hydrogen bonds and electrostatic interactions can enhance the absorption spectra of fluorescent proteins. Additionally, creating a more hydrophilic environment for the chromophore may lead to improved spectral characteristics.
Article
Chemistry, Applied
Marta Gordel-Wojcik, Marcin Nyk, Paulina Smialek, Elizaveta F. Petrusevich, Wojciech Bartkowiak, Marek Samoc, Beata Jedrzejewska
Summary: A series of dyes with electron-donating and electron-accepting groups connected through a conjugated linker were designed and their absorption properties were studied. Spectrally resolved two-photon absorption measurements showed wide wavelength regions of nonlinear optical absorption. The compound containing the phenyl ring exhibited high effective two-photon absorption cross-section of 772 +/- 100 GM at 600 nm. The experimental results were supported by electronic-structure calculations.
Article
Chemistry, Physical
Silvia D'Auria, Alessandro Pedrini, Ilaria Ferraboschi, Jerome Vachon, Cristina Sissa, Roberta Pinalli, Enrico Dalcanale
Summary: In this study, the researchers used two-photon microscopy (2PM) to investigate the compatibility between PE-HEMA and EVOH at the sub-micrometer level. 2PM is a nonlinear fluorescence imaging technique commonly used for thick biological tissue analysis. Polymer blending was visualized using 3D images obtained through 2PM. It was observed that the functionalized PE-HEMA, when reacted with ODIN, formed uniformly distributed blends on the surface and in the bulk, and repeated reprocessing partially reversed the compatibilization by forming ODIN dimers as the most stable H-bonding array in the solid state.
Article
Chemistry, Multidisciplinary
K. Swathi, Meleppatt Sujith, P. S. Divya, P. Merin Varghese, Andrea Delledonne, D. K. Andrea Phan Huu, Francesco Di Maiolo, Francesca Terenziani, Andrea Lapini, Anna Painelli, Cristina Sissa, K. George Thomas
Summary: The phenomenon of excited-state symmetry breaking is often observed in multipolar molecular systems, significantly affecting their photophysical and charge separation behavior. In this study, the intrinsic factors regulating excited-state symmetry breaking in multibranched systems are explored using a combination of experimental and theoretical investigation. It is found that the large Stokes shifts observed in highly symmetric phenyleneethynylenes can be explained by the presence of low-lying dark states, as confirmed by two-photon absorption measurements and TDDFT calculations. In addition, an intense fluorescence emission is observed in these systems contrary to Kasha's rule, and this behavior is explained by a novel phenomenon called symmetry swapping, which describes the inversion of the energy order of excited states as a result of symmetry breaking.
Article
Pharmacology & Pharmacy
Felipe M. Gonzalez-Fernandez, Andrea Delledonne, Sara Nicoli, Paolo Gasco, Cristina Padula, Patrizia Santi, Cristina Sissa, Silvia Pescina
Summary: This research aims to develop nanostructured lipid carriers (NLC) for periocular administration of dexamethasone acetate for the treatment of ocular inflammation. The NLC was formulated using solid and liquid lipid mixtures, resulting in a particle size of 106.9 +/- 1.2 nm, PDI = 0.104 +/- 0.019, and zeta potential = -6.51 +/- 0.575 mV. Ex vivo permeation studies showed that dexamethasone acetate was metabolized into free dexamethasone and exhibited higher permeation capabilities across both sclera and choroid tissues.
Article
Pharmacology & Pharmacy
Adriana Fantini, Luca Giulio, Andrea Delledonne, Silvia Pescina, Cristina Sissa, Sara Nicoli, Patrizia Santi, Cristina Padula
Summary: The optimization of non-invasive formulations for the delivery of high molecular weight compounds is the greatest achievement in the field of advanced drug delivery. Permeation experiments using fatty acids and bile salts as penetration enhancers showed that it is feasible to increase the mucosa permeation of high molecular weight dextrans. This study suggests that buccal administration can be used for the delivery of high molecular weight compounds.
Article
Chemistry, Multidisciplinary
Brunella Bardi, Katerina V. Vygranenko, Beata Koszarna, Olena Vakuliuk, Lukasz Dobrzycki, Daniel T. Gryko, Francesca Terenziani, Anna Painelli
Summary: A new method has been developed to prepare merocyanines, including rhodols, from readily available tetrafluorohydroxybenzaldehyde and aminophenols. This method enables the synthesis of merocyanines with three fluorine atoms and additional conjugated rings under neutral, mild conditions. The transformation of the rhodol chromophore into π-expanded merocyanines allows for the modulation of photophysical properties, such as shifting absorption and emission bands across the visible spectrum, achieving a large Stokes shift, high brightness, strong two-photon absorption, and solvatofluorochromism. Detailed investigation provides insights into the different spectroscopic behavior of rhodols and new merocyanines, including solvatochromism and two-photon absorption.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Inorganic & Nuclear
Silvia Ruggieri, Silvia Mizzoni, Chiara Nardon, Enrico Cavalli, Cristina Sissa, Michele Anselmi, Pier Giorgio Cozzi, Andrea Gualandi, Martina Sanadar, Andrea Melchior, Francesco Zinna, Oliver G. Willis, Lorenzo Di Bari, Fabio Piccinelli
Summary: This study synthesized and characterized three complexes and investigated their photophysical and thermodynamic properties. The results showed that the nature of the ligands had a significant impact on the properties of the complexes, and the properties of the complexes also affected their sensitization efficiency towards the metal ions. The ttaligand was found to be the optimal antenna for sensitizing Eu-(III) luminescence, while the Coum ligand sensitized better Tb-(III) luminescence.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Francesco Bertocchi, Andrea Delledonne, Guillem Vargas-Nadal, Francesca Terenziani, Anna Painelli, Cristina Sissa
Summary: Aggregates of cyanine dyes are investigated for their tunable spectral properties in this study. The study presents a joint experimental and theoretical analysis of different types of aggregates formed by a family of cyanine dyes. The analysis rationalizes the optical spectra using an essential-state model that takes into account intermolecular interactions, molecular polarizability, and vibronic coupling.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Francesco Bertocchi, Danilo Marchetti, Sandra Doria, Mariangela di Donato, Cristina Sissa, Mauro Gemmi, Enrico Dalcanale, Roberta Pinalli, Andrea Lapini
Summary: Our study investigates the impact of hydrogen bond-assisted H-aggregate formation on the optical properties of two functionalized naphthyridine derivatives, ODIN-EtPh and ODIN-But. Through a combination of techniques including X-ray and electron crystallography, spectroscopy, and pump-probe spectroscopy, we reveal that the formation of dimers for ODIN derivatives is inhibited in polar solvents while favored in solvents with poor hydrogen bond-forming capabilities. The presence of a phenyl group linked to the ureidic unit stabilizes the charge-transfer excited state of ODIN derivatives, leading to a reduction in fluorescence emission.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Food Science & Technology
Francesca Accardo, Barbara Prandi, Francesca Terenziani, Tullia Tedeschi, Stefano Sforza
Summary: Flavonoids in cocoa and derived products can interact with proteins, but this interaction does not affect protein bioaccessibility and digestibility during digestion. The interaction between whey proteins and catechins was evaluated in a model system and commercial milk chocolate. The solubilization, hydrolysis, and peptide profile of proteins were determined using in vitro digestion methods. The slight interaction between flavonoids and proteins did not hinder protein digestion and solubilization. The digestibility of proteins in milk chocolate was found to be complete.
FOOD RESEARCH INTERNATIONAL
(2023)
Article
Nanoscience & Nanotechnology
Andrea Delledonne, Elisa Guazzelli, Silvia Pescina, Annalisa Bianchera, Giancarlo Galli, Elisa Martinelli, Cristina Sissa
Summary: The self-assembly properties of unimer micelles were utilized to prepare fluorescent nanocarriers encapsulating hydrophobic fluorophores. These nanocarriers were composed of a copolymer containing oligoethyleneglycol and perflurohexylethyl side chains, and formed small nanoparticles (<10 nm) with tunable properties in water. An easy procedure for encapsulating a small hydrophobic molecule within the nanocarriers was presented, and experimental data showed that the fluorophore was effectively embedded and maintained its emissive properties in water. Additionally, the dye-loaded nanocarriers demonstrated efficacy as a fluorescent probe in two-photon imaging of thick ex vivo porcine scleral tissue.
ACS APPLIED NANO MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Davide Giavazzi, Marvin F. Schumacher, Luca Grisanti, Mattia Anzola, Francesco Di Maiolo, Jennifer Zablocki, Arne Luetzen, Manuela Schiek, Anna Painelli
Summary: This study provides a combined experimental and theoretical investigation of a new type of chiral aggregates with structure-correlated excitonic properties in the visible to near-infrared spectral range. It is found that different alkyl chain lengths can lead to different aggregation scenarios and spectroscopic features, including simultaneous blue- and red-shifted signatures, as well as dominant blue-shifted signatures. The calculation of circular dichroism including intermolecular charge transfer is explicitly expressed for the first time.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Andrea Delledonne, Martina Orlandini, Francesca Terenziani, Paolo Pio Mazzeo, Alessia Bacchi, Lucia Carlucci, Angiolina Comotti, Jacopo Perego, Paolo Pelagatti
Summary: Three new microporous mixed-ligand MOFs (PUM310, PUM310Me(2), and PUM310CO) were synthesized through solvothermal reactions between bis-pyridine-bis-amide ligands and 2,6-naphthalenedicarboxylic acid. The structural characterization revealed polycatenated frameworks with truncated Zn-paddle wheels, and solvent removal resulted in framework rearrangement and shrinkage. The MOFs exhibited fluorescence in the solid state, and the optical spectra indicated efficient Forster resonance energy transfer (FRET) between the ndca(2-) donor and bis-pyridine acceptors, particularly in PUM310CO.
Article
Chemistry, Physical
Nerea Gonzalez-Pato, Davide Blasi, Domna M. Nikolaidou, Francesco Bertocchi, Jesus Cerda, Francesca Terenziani, Nora Ventosa, Juan Arago, Andrea Lapini, Jaume Veciana, Imma Ratera
Summary: This article reports the preparation and characterization of organic nanoparticles doped with polychlorinated trityl radicals as nanothermometers for temperature sensing. The nanoparticles show excellent thermal sensitivity and have the potential to be used as nanothermometers in bio applications.
Article
Chemistry, Physical
Sergey Yu. Ketkov, Sheng-Yuan Tzeng, Elena A. Rychagova, Anton N. Lukoyanov, Wen-Bih Tzeng
Summary: Metallocenes, including methylcobaltocene, play important roles in various fields of chemistry. The ionization energy and vibrational structure of (Cp ')(Cp)Co can be influenced by introducing methyl substituents. The mass-analyzed threshold ionization spectrum and DFT calculations provide accurate information about the properties and transformations of (Cp ')(Cp)Co.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Review
Chemistry, Physical
Qifeng Mu, Jian Hu
Summary: Polymer mechanochemistry has experienced a renaissance due to the rapid development of mechanophores and principles governing mechanochemical transduction or material strengthening. It has not only provided fundamental guidelines for converting mechanical energy into chemical output, but also found applications in engineering and smart devices.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Da Hye Yang, Francesco Ricci, Fredrik L. Nordstrom, Na Li
Summary: Through systematic evaluation of the oiling-out behavior of procaine, we identified both stable and metastable liquid-liquid phase separation, and established phase diagrams to assist in rational selection of crystallization strategies.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Vikki Anand Varma, Simmie Jaglan, Mohd Yasir Khan, Sujin B. Babu
Summary: Designing engineering structures like nanocages, shells, and containers through self-assembly of colloids is a challenging problem. This work proposes a simple model for the subunit, which leads to the formation of monodispersed spherical cages or containers. The model with only one control parameter can be used to design cages with the desired radius.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Hainan Jiang, Yaolong He, Xiaolin Li, Zhiyao Jin, Huijie Yu, Dawei Li
Summary: The cycling lifespan and coulombic efficiency of lithium-ion batteries are crucial for high C-rate applications. The Li-ion concentration plays a crucial role in determining the mechanical integrity and structural stability of electrodes. This study focuses on graphite as the working electrode and establishes an experimental system to investigate the mechanical properties of composite graphite electrode at different C-rates. Considering the effect of Li-ion concentration in stress analysis is found to be significant.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Zhiye Wang, Yunchuan Li, Mingjun Sun
Summary: This study investigates the influence of intramolecular pi-pi interactions on the electronic transport capabilities of molecules. By designing and analyzing three pi-conjugated molecules, the researchers observe that different pi-conjugated structures have varying effects on electron transport. The findings provide a theoretical foundation for designing single-molecule electronic devices with multiple electron channels based on intramolecular pi-pi interactions.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Yuandong Xu, Haoyang Feng, Chaoyang Dong, Yuqing Yang, Meng Zhou, Yajun Wei, Hui Guo, Yaqing Wei, Jishan Su, Yingying Ben, Xia Zhang
Summary: Hollow MoS2 cubes and spheres were successfully synthesized using a one-step hydrothermal method with the hard template method. The hollow MoS2 cubes exhibited higher specific capacitance and energy density compared to the hollow MoS2 spheres. The symmetrical supercapacitors assembled with these hollow structures showed good performance and high capacity retention after multiple cycles. These findings suggest that controlling the pore structure and surface characteristics of MoS2 is crucial for enhancing its electrochemical properties.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Ainhoa Oliden-Sanchez, Rebeca Sola-Llano, Joaquin Perez-Pariente, Luis Gomez-Hortiguela, Virginia Martinez-Martinez
Summary: The combination of photoactive molecules and inorganic structures is important for the development of advanced materials in optics. In this study, bulky dyes were successfully encapsulated in a zeolitic framework, resulting in emission throughout the visible spectrum.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Miaomiao Zhang, Cunyuan Pei, Qiqi Xiang, Lintao Liu, Zhongxu Dai, Huijuan Ma, Shibing Ni
Summary: The design of a solid electrolyte interphase (SEI) plays a crucial role in improving the electrochemical performance of anode materials. In this study, lithium difluoro(oxalate)borate (LiDFOB) is used as an electrolyte additive to form a protective SEI film on Li3VO4 (LVO) anodes. The addition of LiDFOB results in a dense, uniform, stable, and LiF-richer SEI, which enhances the Li-ion storage kinetics. The generated SEI also prevents further decomposition of the electrolyte and maintains the morphology of LVO anodes during charge/discharge processes. This work demonstrates the effectiveness of LiDFOB as a multi-functional additive for LiPF6 electrolytes and provides insights into SEI construction for high-performance LVO anodes.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
B. V. Andryushechkin, T. V. Pavlova, V. M. Shevlyuga
Summary: The atomic structure of the Ag(111)-p(4 x 4)-O phase was reexamined and two phases with the same periodicity were discovered. It was demonstrated that the accepted Ag6 model is incompatible with high-resolution oxygen-sensitive STM images.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
S. L. Romo-Avila, D. Marquez-Ruiz, R. A. Guirado-Lopez
Summary: In this study, we used density functional theory (DFT) calculations to investigate the interaction between model graphene oxide (GO) nanostructures and chlorine monoxide ClO. We aimed to understand the role of this highly oxidizing species in breaking C-C bonds and forming significant holes on GO sheets. Our results showed that C-C bonds in a single graphene oxide sheet can be broken through a simple mechanism involving the dissociation of two chemically attached ClO molecules. The formation of carbonyl groups and holes on the GO surface was also observed. This study provides important insights into the degradation of carbon nanotubes and the stability of GO during the myeloperoxidase (MPO) catalytic cycle.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Alberto Garcia-Fernandez, Birgit Kammlander, Stefania Riva, Hakan Rensmo, Ute B. Cappel
Summary: In this study, the X-ray stability of five different lead halide perovskite compositions (MAPbI3, MAPbCl3, MAPbBr3, FAPbBr3, CsPbBr3) was investigated using photoelectron spectroscopy. Different degradation mechanisms and resistance to X-ray were observed depending on the crystal composition. Overall, perovskite compositions based on the MA+ cation were found to be less stable than those based on FA+ or Cs+. Metallic lead formation was most easily observed in the chloride perovskite, followed by bromide, and very little in MAPbI3. Multiple degradation processes were identified for the bromide compositions, including ion migration, formation of volatile and solid products, as well as metallic lead. CsBr was formed as a solid degradation product on the surface of CsPbBr3.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Timofei Rostilov, Vadim Ziborov, Alexander Dolgoborodov, Mikhail Kuskov
Summary: The shock-loading behavior of nanomaterials is investigated in this study. It is found that shock compaction waves exhibit a distinct two-step structure, with the formation of faster precursor waves that travel ahead of the main compaction waves. The complexity of the shock Hugoniot curve of the tested nanomaterial is described, and the effect of initial porosity on the compressed states is demonstrated.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Sergey S. Nikitin, Alexander D. Koryakov, Elizaveta A. Antipinskaya, Alexey A. Markov, Mikhail V. Patrakeev
Summary: The stability of La1/3Sr2/3Fe1-xMnxO3-delta, a perovskite-type oxide, under reducing conditions is dependent on the manganese content. Increasing the manganese content leads to a decrease in stability. The behavior of iron and manganese in the oxide shows distinct differences, which can be attributed to the difference in the enthalpy of oxidation reactions. Additionally, the change in the La/Sr ratio affects the concentration of iron and manganese ions.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Mosayeb Naseri, Shirin Amirian, Mehrdad Faraji, Mohammad Abdur Rashid, Maicon Pierre Lourenco, Venkataraman Thangadurai, D. R. Salahub
Summary: Inspired by the successful transfer of freestanding ultrathin films of SrTiO3 and BiFeO3, this study assessed the structural stability and investigated the electronic, optical, and thermoelectric properties of a group of two-dimensional perovskite-type materials called perovskenes. The findings revealed that these materials are wide bandgap semiconductors with potential application in UV shielding. Moreover, they exhibit better electrical and thermal conductivity at high temperatures, enabling efficient power generation in thermoelectric devices.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)