Article
Chemistry, Inorganic & Nuclear
Uzma Saleem, Muhammad Tariq, Farooq Khurum Shehzad, Khalil Ahmad, Jahanzaib Khan, Hafiz Muhammad Asif, Muhammad Ali Khan, Sonia Rani, Rabbia Khan, Zeinhom M. El-Bahy
Summary: Nonlinear optical (NLO) materials are crucial in modern photonics and optical devices for generating new frequencies. The synthesis of porphyrin-based NLO materials is complex and challenging, requiring specialized techniques for high purity and yield. Controlling chromophore orientation and optimizing nonlinear optical properties are key difficulties that demand interdisciplinary efforts.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Polymer Science
Yamato Ebii, Yoshinobu Mato, Feng Li, Kenji Tajima, Takuya Yamamoto, Takuya Isono, Toshifumi Satoh
Summary: In this study, multicyclic polystyrene (mc-PS) was successfully synthesized through the cyclopolymerization of alpha,omega-dinorbornenyl end-functionalized PS macromonomers mediated by the Grubbs third-generation catalyst. The number of cyclic units in the obtained mc-PS was controlled by adjusting the macromonomer-to-G3 ratio, with a maximum of 239 units achieved. The developed cyclopolymerization strategy provides a new approach for the synthesis of multicyclic polymers and has significant implications for fundamental studies and material applications.
Article
Thermodynamics
Anjian Pan, Rong-Rong Cai, Chuan-Shuai Dong, Li-Zhi Zhang
Summary: This study numerically investigated the effects of dust particles on the flow and heat transfer characteristics in a parallel-plates duct. The results showed that particles disrupted the flow and thermal boundary layers and formed a dense fouling layer at the walls. Furthermore, ducts with superhydrophobic properties were less influenced by particles due to decreased particle deposition.
JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME
(2022)
Article
Materials Science, Multidisciplinary
Chinmayananda Gouda, Debashis Barik, Chandrima Maitra, Kai-Chieh Liang, Feng-Cheng Ho, Venkatesan Srinivasadesikan, Sarala Chandran, Shu-Pao Wu, Ming-Chang Lin, Hong-Cheu Lin
Summary: The synthesis of a bi-fluorophoric supramolecular polymer enables cyanide detection and cell imaging applications.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Engineering, Multidisciplinary
Sohita Rajput, Krishnendu Bhattacharyya, Amit Kumar Pandey, Ali J. Chamkha
Summary: The present article explores the flow of ternary hybrid nanofluid between two parallel plates, with the upper plate in squeezing motion. The study reveals that the velocity of the nanofluid reduces with squeezing and magnetic parameters, while its temperature can be controlled by the amount of nanoparticles, Prandtl number, and radiation effect. The findings also indicate that the performance of ternary hybrid nanofluid is relatively more efficient than binary and unary for heat transfer applications.
RESULTS IN ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Felipe Reviriego, Eduardo Pena-Cabrera, Siddhant V. Kokate, Ibon Alkorta, Jose Elguero
Summary: The rotational behavior and NMR signal assignment of 10-Hydrazino-BODIPY were determined using a combination of traditional methods, spin-spin coupling constants, and DFT calculations. The results were confirmed through comparison with calculated barriers.
MAGNETIC RESONANCE IN CHEMISTRY
(2021)
Article
Chemistry, Medicinal
Alexandra Ibanez-Escribano, Felipe Reviriego, Nerea Vela, Cristina Fonseca-Berzal, Juan Jose Nogal-Ruiz, Vicente J. Aran, Jose Antonio Escario, Alicia Gomez-Barrio
Summary: A series of compounds with trichomonacidal activity were synthesized and two of them showed better efficacy compared to the reference drug, with high activity against resistant isolates as well.
BIOORGANIC & MEDICINAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Andre A. Vieira, Giliandro Farias, Wallison C. Costa, Juliana Eccher, Ivan H. Bechtold, Fabien Durola, Harald Bock
Summary: The introduction of fluorine atoms into disk-shaped molecules can change the liquid crystal phase type formed by the molecules, and fluorination is a simple way to induce or stabilize columnar self-assembly in these systems. Additionally, fluorination can improve the performance of optoelectronic devices and light output effects.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Review
Chemistry, Inorganic & Nuclear
Enrico Falcone, Michael Okafor, Nicolas Vitale, Laurent Raibaut, Angelique Sour, Peter Faller
Summary: The study focuses on sensors of the Cu2+ state and discusses the challenges in detecting labile and thermodynamically accessible Cu2+ using luminescent or MRI-active probes in extracellular fluids. The specificity, affinity for Cu2+, and competition with other ligands like Zn2+ play crucial roles in designing potential sensors for measuring Cu2+ accurately. However, current research shows that developing sensors capable of specifically detecting Cu2+ in biological systems remains a significant challenge.
COORDINATION CHEMISTRY REVIEWS
(2021)
Article
Chemistry, Multidisciplinary
Clotilde Philippe, Anh Thy Bui, Maxime Beau, Hugo Bloux, Francois Riobe, Olivier Mongin, Thierry Roisnel, Marie Cordier, Frederic Paul, Loic Lemiegre, Yann Trolez
Summary: In this study, 1,1,4,4-tetracyanobutadienes (TCBDs) carrying a wide variety of fluorophores were synthesized using a multi-step synthesis approach. The compounds were obtained from ynamides through a [2+2] cycloaddition/retroelectrocyclization reaction with tetracyanoethylene. The TCBDs exhibited remarkable emission properties across a wide range of wavelengths, from the visible region to the near-infrared (NIR) range. The quantum yields of these compounds in cyclohexane reached unexpectedly high values, up to 7.8%.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Chemistry, Organic
Clotilde Philippe, Maeva Coste, Yann Bretonniere, Loic Lemiegre, Sebastien Ulrich, Yann Trolez
Summary: This study reported a method for synthesizing TPE containing four ynamides, which was further converted into a tetra-TCBD derivative. Despite poor performance in solution, the tetra-TCBD compound exhibited near-infrared luminescence in the solid state, showing potential for future applications in molecular electronic devices.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2022)
Review
Chemistry, Organic
Ludmilla Sturm, Frederic Aribot, Luc Soliman, Harald Bock, Fabien Durola
Summary: An efficient and versatile synthetic approach has been developed for the synthesis of large carboxy-substituted polycyclic arenes. This method allows flexible formation of precursors followed by rigidification reactions to yield fully condensed polycyclic aromatic compounds.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Fabricia Nunes da Silva, Hugo Marchi Luciano, Carlos H. Stadtlober, Giliandro Farias, Fabien Durola, Juliana Eccher, Ivan H. Bechtold, Harald Bock, Hugo Gallardo, Andre A. Vieira
Summary: This study found that triply phenanthryl- and tetrahelicenyl-substituted triazine-hexaalkyl esters with short alkyl chains can exhibit glass transitions conveniently above room temperature within the hexagonal columnar liquid crystalline state, resulting in a solid columnar order at room temperature. These glassy columnar liquid matrices can be used for the orientation of guest emitters to achieve anisotropic emission, as the hexagonal columnar mesophase can be easily aligned with a perpendicular director on a solid substrate. The condition for face-on alignment on substrates can be achieved with the moderately nonplanar tetrahelicenyl derivatives, despite their short alkyl periphery. An unusual phase transition between two columnar mesophases of the same hexagonal symmetry but very different long-distance regularity of the column lattice was found in one phenanthryl homolog.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Hugo Marchi Luciano, Giliandro Farias, Cristian M. Salla, Larissa G. Franca, Suman Kuila, Andrew P. Monkman, Fabien Durola, Ivan H. Bechtold, Harald Bock, Hugo Gallardo
Summary: By incorporating sulfur-containing thiophene bridges, the spin-orbit coupling associated with the radiative T-1 -> S-0 pathway was enhanced, allowing room-temperature phosphorescence to be observed in solution for all compounds.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Physical
Cristian A. M. Salla, Giliandro Farias, Ludmilla Sturm, Pierre Dechambenoit, Fabien Durola, Aydemir Murat, Bernardo de Souza, Harald Bock, Andrew P. Monkman, Ivan H. Bechtold
Summary: In this study, we investigated the influence of donor and acceptor groups substituted on a twisted three-fold symmetric hydrocarbon homotruxene. The results show that the twisted pi-system of the homotruxene allows it to exhibit persistent room temperature phosphorescence (RTP) even without any donor or acceptor moieties. In solution, a donor methoxy group increases the phosphorescence decay rate, while in the solid-state, molecular aggregation and packing result in a very persistent phosphorescence visible to the naked eye. Additionally, polar substituents modulate the RTP of the inherently nonpolar homotruxene mainly through altered crystal packing.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Inorganic & Nuclear
Katharina Zimmeter, Bertrand Vileno, Carlos Platas-Iglesias, Bharath Vinjamuri, Angeïlique Sour, Peter Faller
Summary: Two new Cu-II-ligand complexes (Cu-II-L1 and Cu-II-L2) inspired by the ATCUN motif were reported. The Cu-II affinity of L2 was substantially increased by replacing the amine and amidate with a pyridine and an amine respectively, reaching a level similar to EDTA. Both Cu-II-L1 and Cu-II-L2 retained several properties of the ATCUN motif, including high selectivity for Cu-II and redox silencing of Cu(II). Cu chelation in biological systems is important for studying the metabolism of Cu and for the treatment of diseases with Cu overload. The synthesis and characterization of these Cu-binding ligands provide valuable insights for the development of Cu-II chelators in biological systems.
INORGANIC CHEMISTRY
(2023)
Article
Biochemistry & Molecular Biology
Maxime Roger, Yann Bretonniere, Yann Trolez, Antoine Vacher, Imane Arbouch, Jerome Cornil, Gautier Felix, Julien De Winter, Sebastien Richeter, Sebastien Clement, Philippe Gerbier
Summary: This article describes three new tetraphenylethene (TPE) push-pull chromophores with strong intramolecular charge transfer. The compounds were synthesized through [2 + 2] cycloaddition-retroelectrocyclization (CA-RE) click reactions using electron-deficient alkenes and an electron-rich alkyne-tetrafunctionalized TPE. Only the starting TPE-alkyne showed significant aggregation-induced emission (AIE) behavior, while the other compounds did not exhibit fluorescence. The UV-Visible absorption spectra showed a red-shift, especially for TPE-F-4-TCNQ. Photothermal studies revealed promising properties for TPE-TCNQ and TPE-F4-TCNQ in the solid state, with TPE-F4-TCNQ showing excellent performance.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Organic
Alexandre Quelhas, Thierry Roisnel, Jean-Claude Guillemin, Yann Trolez
Summary: The kinetically unstable propargylisocyanide complexed with tetrakis(acetonitrile) copper(I) hexafluorophosphate and participated in a copper-catalyzed alkyne-azide cycloaddition reaction (CuAAC). After decomplexation, the isocyanide was involved in a Ugi reaction. This complexation allows reactions on the CC triple bond without the constraints of compound instability or competitive reactivity of the isocyanide group.
Review
Chemistry, Organic
Loic Lemiegre, Yann Trolez
Summary: In a recent paper in Chemistry - A European Journal, Nielsen and coworkers conducted a thorough study on the mechanism of the [2+2] cycloaddition-retroelectrocyclization (CA-RE) reaction between an electron-rich alkyne and tetracyanoethylene (TCNE), resulting in the formation of 1,1,4,4-tetracyanobutadiene (TCBD). Through extensive kinetic studies, the authors identified crucial intermediates and determined the reaction to be autocatalytic for the first time. Considering the increasing utilization of TCBDs and the significance of the CA-RE reaction, this paper provides valuable insights for future advancements in this promising reaction.
ASIAN JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Nanoscience & Nanotechnology
Sarah Boumati, Angelique Sour, Valerie Heitz, Johanne Seguin, Gautier Beitz, Yusuke Kaga, Marta Jakubaszek, Johannes Karges, Gilles Gasser, Nathalie Mignet, Bich-thuy Doan
Summary: Researchers have successfully used a theranostic agent with combined diagnostic and therapeutic capabilities for photodynamic therapy, fluorescence imaging, and magnetic resonance imaging. The experimental results show that this theranostic agent has a significant impact on tumor growth and has the potential to become a drug candidate for cancer.
ACS APPLIED BIO MATERIALS
(2023)