Article
Biochemistry & Molecular Biology
Zubair Ahmed, Rafael dos Santos Carvalho, Aline Magalhaes dos Santos, Francesca Gambassi, Elisa Bandini, Lorenza Marvelli, Lucia Maini, Andrea Barbieri, Marco Cremona
Summary: This paper presents the synthesis, structure, photophysical, and optoelectronic properties of five eight-coordinate Europium(III) ternary complexes. The complexes exhibit bright red luminescence upon UV excitation. A tppo derivative (5) displays the highest quantum yield of 66%. An OLED device was fabricated with complex 5 as the emitting component, showing potential for optoelectronic applications.
Article
Chemistry, Multidisciplinary
Alexander C. Brannan, Hwan-Hee Cho, Antti-Pekka M. Reponen, Mikko Linnolahti, Manfred Bochmann, Neil C. Greenham, Alexander S. Romanov
Summary: A series of carbene-gold-acetylide complexes have been synthesized and found to exhibit deep-blue to blue-green phosphorescence in various media. The increase of carbene-gold moieties in these complexes leads to higher extinction coefficients and stronger oscillator strength coefficients in the UV-vis spectra.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Applied
Jia-Wei Liu, Han-Chen Zhou, Zi-Kun Wang, Xiong Tang, Hua-Yu Wu, Shi Wang, Wen-Yong Lai, Yong-Hua Li
Summary: This study modified 1,3,4-oxadiazole and synthesized Ir(III) complexes to investigate the effects of different coordination modes on their photophysical and electrochemical properties. High-performance electroluminescence devices were successfully fabricated using the obtained complexes.
Article
Chemistry, Physical
Makarii I. Kozlov, Kirill M. Kuznetsov, Alexander S. Goloveshkin, Andrei Burlakin, Maria Sandzhieva, Sergey V. Makarov, Elena Ilina, Valentina V. Utochnikova
Summary: An approach to increase the efficiency of europium-based OLEDs was proposed through the formation of a mixed-ligand complex. By designing a series of europium complexes and optimizing the solution deposition process, including host selection and variation of solvent and deposition parameters, the luminance of the OLEDs was significantly increased. The maximum luminance of the Eu-based OLED reached up to 700 cd/m(2), which is one of the highest values for a solution-processed Eu-based OLED. Finally, the stability of the OLED was investigated.
Article
Chemistry, Applied
Anatolii S. Burlov, Valery G. Vlasenko, Yurii V. Koshchienko, Maxim S. Milutka, Eugene I. Mal'tsev, Artem V. Dmitriev, Dmitry A. Lypenko, Natalia V. Nekrasova, Alexandra A. Kolodina, Nadezhda I. Makarova, Anatolii V. Metelitsa, Vladimir A. Lazarenko, Yan V. Zubavichus, Victor N. Khrustalev, Dmitrii A. Garnovskii
Summary: New Zn(II) complexes of bidentate Schiff base ligands were synthesized and extensively characterized, revealing their photophysical properties and emission performance in organic light-emitting diodes. The study showed significant influence of substituents on the absorption and fluorescence properties, and explained the electronic absorption spectra characteristics using quantum chemical calculations. The EL spectra of the complexes exhibited intrinsic radiation from the zinc(II) complexes without exciplex or excimer states, with EQE measurements showing a maximum value close to 3%.
APPLIED ORGANOMETALLIC CHEMISTRY
(2021)
Article
Optics
Andreia Morais, Douglas R. Bernardo, Jos'e C. Germino, Ana F. Nogueira, Jilian N. Freitas
Summary: By synthesizing the polymer PBPyVOctV-Eu(tta)3, incorporating an europium center into the polymer backbone changed the optical and electronic properties of the conjugated polymer, resulting in high luminance and high current efficiency in organic light-emitting diodes.
JOURNAL OF LUMINESCENCE
(2021)
Review
Engineering, Electrical & Electronic
Sneha Kagatikar, Dhanya Sunil
Summary: Optoelectronics is a field of active research focusing on developing semiconducting materials with a wide emission window for energy conservation and improved device lifetime. Efficient material design for OLEDs has been a key area of research, along with the exploration of metal-organic compounds for OLED applications.
JOURNAL OF ELECTRONIC MATERIALS
(2021)
Article
Food Science & Technology
Milad Hadidi, Alfonso Garvin, Raquel Ibarz, Albert Ibarz
Summary: The study found that the alfalfa saponins mixture absorbs radiation most strongly between 470 and 610 nm, and the photo-degradation rate increases with higher temperature and lower pH values. After 80 minutes of treatment, the concentration of the alfalfa saponins mixture decreased by 80% at pH 4 and 80 degrees Celsius.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2022)
Article
Biochemistry & Molecular Biology
N. Connor Payne, Alena S. Kalyakina, Kritika Singh, Mark A. Tye, Ralph Mazitschek
Summary: CoraFluors, a new class of macrocyclic terbium complexes, exhibit desirable physicochemical properties for biological studies, enabling quantitative characterization of protein interactions and isoform-selective targeting in live cells. Their development addresses the limitations of previous luminescent lanthanide complexes and poor cellular permeability, expanding the applications of time-resolved FRET assays in biomedical research.
NATURE CHEMICAL BIOLOGY
(2021)
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, Inorganic & Nuclear
Alexandre Homberg, Federica Navazio, Antoine Le Tellier, Francesco Zinna, Alexandre Fuerstenberg, Celine Besnard, Lorenzo Di Bari, Jerome Lacour
Summary: This research successfully synthesized a series of chiral amide-based bis-pyridine substituted polyether macrocycles through a simple two-step synthesis protocol, with one ligand showing efficient complexation with terbium(iii) ions, leading to interesting chiroptical properties observed in absorbance and fluorescence.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Physical
M. Kozicki, M. Bartosiak, M. Dudek, S. Kadlubowski
Summary: This work introduces a radiochromic dosimeter for measuring dose distribution after UV irradiation, utilizing different UV subranges to induce color reactions that correspond to absorbed UV dose, with potential applications in 2D dose distribution measurements and solar radiation assessments. The dosimeter demonstrates sensitivity to UV radiation, with color changes indicating absorbed UV dose, and shows stability in recorded dose distribution over time. Reflectance spectrophotometry coupled with the dosimeter is effective in 1D dose measurements, and 3D optical scanning techniques could expand its application to 3D dosimetry.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2021)
Article
Chemistry, Physical
Elzbieta Sasiadek-Andrzejczak, Malwina Jaszczak, Marek Kozicki
Summary: This work introduces new chemical dosimeters for measuring UV radiation dose in coral reefs and seawater. Unlike current radiometers, these dosimeters can measure the actual dose of UV radiation, which includes both UVA and UVB radiation. The dosimeters are composed of water, Pluronic F-127 gel matrix, and TTC compound, and their stability and response to UV radiation dose were investigated. The results show that these dosimeters can be used to measure absorbed doses of UV radiation in saltwater environments, making them useful for regular measurements in marine and ocean waters throughout the year.
Article
Chemistry, Medicinal
Francesco Zinna, Mariacecilia Pasini, Matteo Cabras, Guido Scavia, Chiara Botta, Lorenzo Di Bari, Umberto Giovanella
Summary: Lanthanide complexes with luminescent and chiroptical properties have unique optical properties, and their combination with appropriate ligands can lead to high dissymmetry factors and strong luminescence. Recent research has shown that europium complexes with beta-diketonates and chiral ligands perform well in circularly polarized organic light-emitting devices.
Article
Biochemistry & Molecular Biology
Thenahandi Prasanthi Deepthika De Silva, Sang Gil Youm, Frank R. Fronczek, Girija Sahasrabudhe, Evgueni E. Nesterov, Isiah M. Warner
Summary: Three novel small organic heterocyclic compounds were synthesized and characterized for possible applications as blue OLED emitters, displaying high spectral purity in both solution and solid-state. An OLED prototype fabricated using one of these compounds achieved a high external quantum efficiency and luminance, showcasing essentially pure blue electroluminescence.
Article
Chemistry, Multidisciplinary
Quaid Zaman, Jefferson S. Costa, Tahir, Arthur R. J. Barreto, Jefferson F. D. F. Araujo, Luis D. Carlos, Albano N. Carneiro Neto, Marco Cremona, Zubair Ahmed, Andre Felipe S. Cruz, Nadson Welkson P. Souza, Karlo Q. da Costa, Victor Dmitriev, Anna Laurenzana, Francesca Margheri, Tommaso Del Rosso
Summary: A new experimental method is proposed in this study to determine the thickness and refractive index of transparent thin films simultaneously using DLWGs, which can be applied to various transparent organic materials.
Article
Nanoscience & Nanotechnology
T. A. Faraco, N. A. Yoshioka, R. M. Sabio, H. da S. Barud, I. O. Maciel, W. G. Quirino, B. Fragneaud, A. M. de Aguiar, S. J. L. Ribeiro, M. Cremona, C. Legnani
Summary: In this study, colloidal silica nanospheres with an average size of 400 nm were synthesized using the modified Stober method. An ordered close-packed silica nanosphere monolayer was successfully fabricated onto ITO-coated glass substrates through a three-step spin-coating method. The coated ITO/glass substrate showed good optical transmittance in the visible and near-infrared regions, indicating potential applications in optoelectronic devices to enhance efficiency in photovoltaic cells.
Article
Green & Sustainable Science & Technology
Ariane V. S. Cebrian, Rafael S. Carvalho, Arthur R. J. Barreto, Fernando E. Maturi, Hernane S. Barud, Robson R. Silva, Cristiano Legnani, Marco Cremona, Sidney J. L. Ribeiro
Summary: A new method for preparing transparent BC membranes as substrates for OLEDs has been developed in this study, combining sustainable techniques with recycled petrochemical plastics and naturally occurring biopolymers. The resulting membranes exhibit lower roughness and the fabricated OLEDs show good current efficiency and power density.
ADVANCED SUSTAINABLE SYSTEMS
(2022)
Article
Materials Science, Multidisciplinary
Moliria V. Santos, Hernane S. Barud, Monica A. S. Alencar, Marcelo Nalin, Sergio H. Toma, Koiti Araki, Assis V. Benedetti, Indhira O. Maciel, Benjamin Fragneaud, Cristiano Legnani, Celso Molina, Marco Cremona, Sidney J. L. Ribeiro
Summary: Bacterial nanocellulose (BNC) is a natural biopolymer obtained by gram-negative bacteria and can be used to produce multifunctional organic-inorganic nanocomposites. Phosphotungstic acid (PWA) in combination with BNC creates photochromic organic-inorganic nanocomposites with reversible color-changing behavior under ultraviolet light. The prepared nanocomposites exhibit a reversible photochromic effect.
FRONTIERS IN MATERIALS
(2021)
Article
Pharmacology & Pharmacy
Bianca A. da Silva, Michael Nazarkovsky, Helmut Isaac Padilla-Chavarria, Edith Alejandra C. Mendivelso, Heber L. de Mello, Caue de S. C. Nogueira, Rafael dos S. Carvalho, Marco Cremona, Volodymyr Zaitsev, Yutao Xing, Rodrigo da C. Bisaggio, Luiz A. Alves, Jiang Kai
Summary: The study focused on the synthesis and biocompatibility analysis of doped nanoparticles with potential cancer treatment applications. These nanoparticles exhibited good crystallinity and uniform distribution of rare earth oxides.
Article
Polymer Science
Nathalia A. Yoshioka, Thales A. Faraco, Hernane S. Barud, Sidney J. L. Ribeiro, Marco Cremona, Benjamin Fragneaud, Indhira O. Maciel, Welber G. Quirino, Cristiano Legnani
Summary: Nanoparticulate materials have attracted interest in the field of organic electronics due to their versatility in increasing device efficiency. In this study, nanoparticles with different stable conformations were synthesized and their structural and optoelectronic properties were investigated. The experimental results showed that the nanoparticles exhibited improved light absorption capacity in aqueous media and were effective in promoting the dissociation of excitons. This work opens up possibilities for using these nanoparticles as photoactive layers in organic photovoltaic devices that interface with biological systems.
Review
Polymer Science
Thales Alves Faraco, Marina de Lima Fontes, Rafaella Takehara Paschoalin, Amanda Maria Claro, Isabella Salgado Goncalves, Mauricio Cavicchioli, Renan Lira de Farias, Marco Cremona, Sidney Jose Lima Ribeiro, Hernane da Silva Barud, Cristiano Legnani
Summary: With the progress of nanotechnology, organic electronics have gained momentum, especially in the production and development of electronic devices based on organic semiconductors. In recent years, there has been great interest in using organic electronics in various fields, including biomedicine. Bacterial nanocellulose (BNC) has attracted attention as an advanced material for its unique physical and mechanical properties, making it a versatile substrate for organic electronics applications. This review focuses on BNC production methods, properties, and applications, particularly in OLEDs and flexible OLEDs (FOLEDs), and discusses the future progress of BNC-based flexible substrate nanocomposites.
Article
Chemistry, Analytical
Fernando Lazaro Tahir, Fernando Lazaro Q. Freire Jr, Ricardo Aucelio, Marco Cremona, Juliana da S. Padilha, Giancarlo Margheri, Quaid C. Zaman, Guilherme Concas, Mariana Gisbert, Sajjad Ali, Carlos A. T. E. Toloza, Yordy D. Licea, Tatiana S. Saint'Pierre, Rafael Carvalho, Rajwali Khan, Gino Mariotto, Nicola Daldosso, Geronimo Perez, Tommaso Del Rosso
Summary: Sensors for heavy metal ion detection in water are in high demand due to their harmful effects. This study synthesized luminescent oxidized AuNCs as a potential alternative method to complex and costly instrumentation. The bleached AuNCs colloidal dispersions showed different responses in the UV and blue spectral regions when detecting Cd2+, Pb2+, Hg2+ and CH3Hg+ ions. The detection limit for Hg2+ was found to be 3 ppb (15 nmol/L).
Article
Biochemistry & Molecular Biology
Zubair Ahmed, Rafael dos Santos Carvalho, Aline Magalhaes dos Santos, Francesca Gambassi, Elisa Bandini, Lorenza Marvelli, Lucia Maini, Andrea Barbieri, Marco Cremona
Summary: This paper presents the synthesis, structure, photophysical, and optoelectronic properties of five eight-coordinate Europium(III) ternary complexes. The complexes exhibit bright red luminescence upon UV excitation. A tppo derivative (5) displays the highest quantum yield of 66%. An OLED device was fabricated with complex 5 as the emitting component, showing potential for optoelectronic applications.
Article
Engineering, Electrical & Electronic
Halice de Oliveira Xavier Silva, Thales Alves Faraco, Indhira Oliveira Maciel, Welber Gianini Quirino, Benjamin Fragneaud, Paula Gomes Pereira, Cristiano Legnani
Summary: In this study, aluminum-doped zinc oxide (AZO) thin films were grown on glass substrates using radio-frequency magnetron sputtering method at room temperature without heat treatment. The impact of deposition parameters such as working pressure, rf-power, and thickness on the structural, electrical, and optical properties of AZO films was investigated. The optimized AZO film exhibited low electrical resistivity and high transmittance in the visible region, making it comparable to commercial indium tin oxide (ITO) films. Furthermore, the AZO film was successfully utilized as a transparent electrode in an organic light-emitting diode (OLED), showing comparable characteristics to an ITO-based device.
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Amanda Marques Lopes Estolano, Petrus d'Amorim Santa Cruz Oliveira, Flavio Jose da Silva, Felipe Mendes da Cruz, Tiago Felipe de Abreu Santos, Nathalia Bezerra de Lima
Summary: The objective of this study is to elucidate the importance of microscopy techniques for the direct evaluation of the abrasive behavior of cement pastes with silicon carbide (SiC) microparticles. The results show that the addition of SiC microparticles can enhance the mechanical properties of cementitious materials, explained by the significant filling of pores observed in SEM and the reduced surface roughness identified in AFM. The roughness and porosity results acquired by SEM and AFM techniques can provide relevant information for the analysis of the durability of cementitious materials.
MATERIA-RIO DE JANEIRO
(2023)
Article
Materials Science, Multidisciplinary
Katerina Skopalova, Itana Nusa Bubanja, Dragomir Stanisavljev, Nikola Cvjeticanin, Vera Kasparkova, Eliska Dad'ova, Erika Pavlikova, Marek Koutny, Marija Gizdavic-Nikolaidis, Petr Humpolicek
Summary: This study compares the biological properties of PANI prepared by different synthesis methods and oxidizing agents, which improves its potential applications in the biomedical field.
Article
Materials Science, Multidisciplinary
Hui-Ping Li, Cai-Yan Gao, Zhi-Ping Chen, Xin-Heng Fan, Lian-Ming Yang
Summary: In this study, a novel type of D-A non-fused-ring copolymers was designed and synthesized to overcome the trade-off relationship between electrical conductivity and Seebeck coefficient in organic semiconductors. The incorporation of fluorine atoms into the polymer backbone effectively increased the ordered degree of molecular stacking and improved both the electrical conductivity and Seebeck coefficient. The bimodal orientation of polymers played a crucial role in decoupling the correlation between electrical conductivity and Seebeck coefficient.
Article
Materials Science, Multidisciplinary
Mansour A. S. Salem, Amjad Mumtaz Khan, Hatem A. M. Saleh, Khalil M. A. Qasem, Mizna Ahmed, Aadil Shafi Bhat, Abdulaziz Abdullah Qasem Ali, Younes S. A. Ghanem, Ali Alrabie, Abdel-Basit Al-Odayni, Waseem Sharaf Saeed, Basheer Al-Anesi
Summary: This research focuses on the versatile substance, polyaniline/layered double hydroxide (PANI@Nd-Co/LDH), under solvothermal conditions. A thorough analysis of its structure and morphology was conducted using various analytical methods. The findings showed that PANI@Nd-Co/LDH exhibited highly sensitive and specific fluorescence detection of Pb(II) and Al(III), outperforming other heavy metal ions. The sensor demonstrated a turn-off fluorescence response for Pb(II) ions and a turn-on fluorescence response for Al(III) ions. The minimum detectable limits (MDL) were determined to be 9.6 nM for Pb(II) and 220 nM for Al(III). PANI@Nd-Co/LDH could be easily regenerated and reused for multiple cycles. The detection mechanisms involved the inner filter effect (IFE) for Pb(II) and the chelation-enhanced fluorescence (CHEF) effect for Al(III). These results highlight the excellent potential of PANI@Nd-Co/LDH in the detection and recognition of Pb(II) and Al(III) ions.
