Article
Chemistry, Multidisciplinary
Chao Nan Zhu, Chen Yu Li, Hu Wang, Wei Hong, Feihe Huang, Qiang Zheng, Zi Liang Wu
Summary: A hydrogel with reversible photo-crosslinks has been developed, allowing for the reprogramming of gradient structures and 3D deformations into various configurations. The hydrogel is fabricated by micellar polymerization of hydrophobic coumarin monomer and hydrophilic acrylic acid, with hexadecyltrimethylammonium chloride micelles enhancing local concentration of coumarin units and improving mechanical properties by forming polyelectrolyte/surfactant complexes. High-efficiency photodimerization and photocleavage reactions of coumarins enable reversible tuning of the network structure of the hydrogel, which can be patterned with different gradient structures through photolithography for versatile functionalities.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Inorganic & Nuclear
Guiqiang Wang, Jiayu Bi, Jiarun Chang, Miao Lei, Huiling Zheng, Yu Yan
Summary: Incorporating Sn2+ into inorganic perovskites can tune the bandgap and improve the film quality, resulting in enhanced performance of perovskite solar cells.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Optics
Kaixin Guo, Xu Wang, Rongfen Zhang, Zhao Fu, Liangyu Zhang, Guobin Ma, Chaoyong Deng
Summary: Multiferroics are increasingly being studied for applications in photovoltaic devices, utilizing polarization and magnetization for carrier separation. Textured black silicon photovoltaic devices were fabricated with a Bi6Fe1.6Co0.2Ni0.2Ti3O18/Bi2FeCrO6 multiferroic heterojunction as an absorber and graphene as an anode, achieving a photoconversion efficiency of 3.9%.
LIGHT-SCIENCE & APPLICATIONS
(2021)
Article
Chemistry, Organic
Sanjay Singh, Ravi Saini, Ravi P. Singh
Summary: An unprecedented organocatalyzed asymmetric vinylogous Michael reaction with excellent enantiomeric ratio and yield has been reported. The remarkable selectivity is attributed to the hydrogen bonding ability of the catalyst. The reaction is versatile and practical for the synthesis of various gamma-functionalized coumarin derivatives.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Thermodynamics
Anuj Sivan Varier, Mrugesh Joshi, Jaichander Swaminathan
Summary: Distillation across an air gap is a highly energy-efficient small-scale desalination technology that achieves better performance by recovering the heat energy from condensation. The research introduces methods to improve system performance by adjusting the air gap thickness and utilizing superhydrophilic surface modification.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Multidisciplinary Sciences
Renxing Lin, Jian Xu, Mingyang Wei, Yurui Wang, Zhengyuan Qin, Zhou Liu, Jinlong Wu, Ke Xiao, Bin Chen, So Min Park, Gang Chen, Harindi R. Atapattu, Kenneth R. Graham, Jun Xu, Jia Zhu, Ludong Li, Chunfeng Zhang, Edward H. Sargent, Hairen Tan
Summary: Researchers have developed ammonium-cation-passivated Pb-Sn perovskites with long diffusion lengths, enabling high-efficiency all-perovskite tandem solar cells. By enhancing the adsorption of the passivator using a stronger surface-passivator interaction, the carrier diffusion length within Pb-Sn perovskites is doubled, resulting in an efficiency of over 22%. The certified efficiency of 26.4% achieved in the all-perovskite tandem solar cells exceeds that of the best-performing single-junction perovskite solar cells.
Article
Chemistry, Physical
Liang Xu, Hongtian Yang, Ruixue Hu, Yuanhao Liang, Yancheng Li, Wenli Xu, Xiaoying Fan, Yufeng Liu
Summary: The study focused on the affinity of four coumarins with human serum albumin (HSA) and compared the binding strength and interaction mechanisms, revealing differences in binding energies and interactions between the coumarins and HSA. The research provided valuable insights into the development of coumarin drug delivery systems.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Multidisciplinary
Meryem Fistikci
Summary: A computational study was conducted to examine the reaction mechanism of aryl propiolates with various radicals. The study revealed two pathways, electrophilic aromatic substitution (EAS) and homolytic aromatic substitution (HAS), depending on the reaction conditions. The results showed that radicals were responsible for ipso-cyclization, while cations were responsible for ortho-cyclization. The study shed light on the controversies in the reaction mechanism and will be useful in determining reaction conditions for the synthesis of important coumarin derivatives.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Organic
Yu Zhao, Zitong Zhou, Lvling Liu, Man Chen, Weiguang Yang, Qi Chen, Michael G. Gardiner, Martin G. Banwell
Summary: An operationally simple synthesis of Z-configured and C3-unsubstituted N-sulfonyl-2-iminocoumarins can be achieved by reacting 2-(1-hydroxyprop-2-yn-1-yl)phenols with sulfonyl azides. The cascade process likely starts with a copper-catalyzed alkyne-azide cycloaddition reaction, leading to the formation of the desired product.
JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Chemistry, Organic
Anindita Bhowmick, Goutam Brahmachari
Summary: A practical and efficient method for the synthesis of functionalized 4-(aryl-/heteroaryl-ethynyl)chroman-2-ones and 2-(aryl-/heteroaryl-ethynyl)chroman-4-ones through copper-catalyzed decarboxylative direct cross-coupling of coumarin-/chromone-3-carboxylic acids with terminal alkynes, leading to the formation of C(sp)-C(sp(3)) bonds, has been discovered. This protocol offers several advantages, including avoidance of ligands and bases, a wide range of substrate compatibility, tolerance to diverse functional groups, and good to excellent yields.
Article
Polymer Science
Gaoshuang Liu, Mahesh P. Bhat, Cheol Soo Kim, Jangho Kim, Kyeong-Hwan Lee
Summary: This study developed a cellulose acetate (CA) ink and optimized printing parameters to mimic the mechanical properties and water absorption ability of plant roots using 3D printing. The 3D-printed CA material exhibited similar Young's modulus, tensile strength, and high hydraulic conductivity to real plant roots.
Article
Chemistry, Inorganic & Nuclear
Mingdong Hong, Chao Chen, Huanping Wang, Ruoshan Lei, Youjie Hua, Zhiyang Wang, Zhiwei Mo, Shiqing Xu
Summary: In this study, high-efficiency white-emitting phosphor-in-glass (PiG) samples were prepared by mixing silicate glass powders with different particle size distributions and concentrations of Y3Al5O12:Ce3+ (YAG:Ce3+) phosphors. By adjusting the particle size distribution of the glass powder and the mixing concentration of the phosphor, the optical performance of PiG can be effectively tuned, providing a pathway for smart white-light devices.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Multidisciplinary
Xiaoxiao Gu, Lixian Xu, Haoyang Yuan, Cailing Li, Juan Zhao, Shuang Li, Dinghua Yu
Summary: The conjugation of sophorolipid and toluidine blue (SL-TB) showed higher bactericidal activity and accumulation of photosensitizers compared to free toluidine blue. This can be attributed to the triple factors of sophorose affinity, hydrophobic association, and electrostatic attraction, which enhances antibacterial photodynamic efficiencies.
Article
Engineering, Marine
Heath Palmer, Ming Zhao, Helen Wu, Pan Hu, Mohammad Rashed Mia, Chengwang Lei
Summary: This study investigates the improvement of hydrodynamic efficiency in dual chamber oscillating water columns (OWC) through numerical simulations. The results show that the dual chamber dual turbine configuration achieves higher efficiency compared to single chamber single turbine and dual chamber shared turbine configurations, operating over a broader range of wavelengths.
Article
Construction & Building Technology
Syed Ahsan Raza Naqvi, Koushik Kar, Sandipan Mishra
Summary: This paper investigates the temperature control in shared workspaces with different heating and cooling sources for energy saving and personalized environment. It proposes multiple time-bound control strategies for preparing the workspace before scheduled activities and a separate control strategy for enhancing occupant comfort during occupied intervals. Experimental results show that the proposed strategies significantly save energy and achieve the desired indoor temperature.
ENERGY AND BUILDINGS
(2023)
Article
Chemistry, Physical
Alexander Aster, Anna-Bea Bornhof, Naomi Sakai, Stefan Matile, Eric Vauthey
Summary: In this study, researchers reported a series of dyads consisting of an NDI electron acceptor and phenyl donors, in which the photoinduced intramolecular electron transfer is faster than pure electronic dephasing, resulting in a broader absorption band shape. Additionally, the fast electron transfer leads to the excitation of a low-frequency vibrational mode in the charge-separated product.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Alexander Aster, Francesco Zinna, Christopher Rumble, Jerome Lacour, Eric Vauthey
Summary: Singlet fission is a process where a high-energy exciton splits into two lower-energy triplet excitons to increase the efficiency of harvesting broad spectrum light. By controlling coupling strength and solvent environment, the rate and efficiency of this process can be adjusted.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Yousra Bentounsi, Konstantinos Seintis, Stephane Diring, Eric Vauthey, Fabrice Odobel
Summary: This study explores a simple method to prepare multicomponent systems in hybrid dye-sensitized photoelectrochemical cells. By comparing the performances of clicked and covalently linked systems, it paves the way for the design of multicomponent hybrid dye-sensitized photoelectrochemical cells through chemistry on the electrode.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Zoltan Szakacs, Eric Vauthey
Summary: Excited-state symmetry breaking (ES-SB) is common in multibranched electron donor-acceptor (DA) molecules in polar environments. However, due to the lack of an unambiguous spectroscopic signature in the UV-vis region, electronic transient absorption (TA) has not been the preferred method for real-time observation of this phenomenon.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Lea Assies, Jose Garcia-Calvo, Francesca Piazzolla, Samantha Sanchez, Takehiro Kato, Luc Reymond, Antoine Goujon, Adai Colom, Javier Lopez-Andarias, Karolina Strakova, Dora Mahecic, Vincent Mercier, Margot Riggi, Noemi Jimenez-Rojo, Chloe Roffay, Giuseppe Licari, Maria Tsemperouli, Frederik Neuhaus, Alexandre Furstenberg, Eric Vauthey, Sascha Hoogendoorn, Marcos Gonzalez-Gaitan, Andreas Zumbuehl, Kaori Sugihara, Jean Gruenberg, Howard Riezman, Robbie Loewith, Suliana Manley, Aurelien Roux, Nicolas Winssinger, Naomi Sakai, Stefan Pitsch, Stefan Matile
Summary: This article discusses the development, evaluation, commercialization, and application of four fluorescent membrane tension probes in current biological research within the NCCR Chemical Biology framework. These probes, named Flipper-TR (R), ER Flipper-TR (R), Lyso Flipper-TR (R), and Mito Flipper-TR (R), are available from Spirochrome and are utilized for studying different cellular structures such as the endoplasmic reticulum and mitochondria.
Article
Chemistry, Physical
Eric Vauthey
Summary: The recent developments in photoredox chemistry have sparked a renewed interest in bimolecular photoinduced electron transfer reactions. Advanced techniques such as spectroscopic tools with better time resolution and molecular dynamics simulations have revealed the complexity of these reactions. This Perspective focuses on the latest studies investigating neutral organic reactants, highlighting the time dependence of quenching rate, the effect of reactant orientation on electronic coupling, and the consequent nature of reaction products. Furthermore, it addresses remaining questions, such as distant electron transfer in nonviscous liquids, and proposes possible directions for further exploration.
JOURNAL OF PHYSICAL CHEMISTRY B
(2022)
Article
Chemistry, Physical
Joseph S. Beckwith, Alexander Aster, Eric Vauthey
Summary: This study investigates the excited-state dynamics of three cyanoanthracene radical anions, revealing a Lifetime of 3-5 picoseconds due to non-radiative deactivation to the ground state. The presence of D-1/D-0 conical intersections are favored by the enhanced flexibility of the radicals compared to their neutral counterparts. The discrepancy with the previously reported nanosecond Lifetime of DCA radical anions is discussed, suggesting limitations for photochemical applications.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Chemistry, Physical
Markus Lunzer, Joseph S. Beckwith, Franziska Chalupa-Gantner, Arnulf Rosspeintner, Giuseppe Licari, Wolfgang Steiger, Christian Hametner, Robert Liska, Johannes Froehlich, Eric Vauthey, Aleksandr Ovsianikov, Brigitte Holzer
Summary: A series of soluble and symmetric chalcogenophenes have been designed and synthesized as potential two-photon absorption initiators. The photophysical analysis reveals their good 2PA properties, especially the strong influence of selenium on 2PA cross sections, making them promising new 2PA photoinitiators. The efficiency and spectral versatility of two selenium-containing lead compounds have been confirmed through structuring and threshold tests, showing superior reactivity and dose compared to commercial initiators.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Physical
Eric Vauthey
Summary: The emissive properties of symmetric molecules with multiple donor-acceptor branches are often similar to those of single-branched analogues due to partial localization of excitation on one branch. Understanding this excited-state symmetry breaking (ES-SB) requires real-time monitoring of the process.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Physical
Jihad Sissaoui, Alexander Efimov, Tatu Kumpulainen, Eric Vauthey
Summary: This study investigates the excited-state properties of an amphiphilic porphyrin-fullerene dyad and its porphyrin analogue adsorbed at the dodecane/water interface using surface second-harmonic generation. The results reveal that both compounds exhibit intense Soret band of the porphyrin in their second-harmonic spectra, despite the formal centrosymmetry of the porphyrin. Polarization-selective measurements and molecular dynamics simulations suggest an angle of about 45 degrees between the donor-acceptor axis and the interfacial plane, with the porphyrin predominantly interacting with the nonpolar phase. Time-resolved measurements show a concentration dependence on the dynamics of both compounds upon Q-band excitation, indicating the occurrence of intermolecular quenching processes. The significant differences in dynamics and spectra between the dyad and the porphyrin analogue are attributed to a self-quenching of the excited dyad via an intermolecular electron transfer.
JOURNAL OF PHYSICAL CHEMISTRY B
(2022)
Article
Chemistry, Physical
Jihad Sissaoui, Darya S. Budkina, Eric Vauthey
Summary: This study reveals that the broadening of the absorption band of crystal violet is caused by torsional disorder in the ground-state, with the center of the band being mainly due to symmetric molecules and the edges originating from transitions to symmetry-broken molecules. Transient-absorption measurements show that these two groups of molecules can interconvert rapidly in liquid but not in a rigid environment.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Pragya Verma, Christoph Nancoz, Johann Bosson, Geraldine M. Labrador, Jerome Lacour, Eric Vauthey
Summary: By combining ultrafast time-resolved fluorescence and transient electronic absorption, we investigated the stereoselectivity in the static stage of photoinduced electron transfer (ET). Our results show that the quenching dynamics for different diastereomeric pairs are the same, regardless of solvent polarity.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Pragya Verma, Mariusz Tasior, Palas Roy, Stephen R. R. Meech, Daniel T. T. Gryko, Eric Vauthey
Summary: In polar environments, most quadrupolar dyes behave like their dipolar counterparts when photoexcited. This is due to excited-state symmetry breaking (ES-SB) where the electronic excitation localizes on one side of the molecule. In this study, two A-D-A dyes containing different acceptor groups were investigated using time-resolved vibrational spectroscopy. The results showed that ES-SB occurs in dyes with cyanophenyl acceptors but not with dicyanovinyl acceptors, attributed to differences in electronic coupling between the D-A branches.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Idaresit Mbakara, Agnieszka Gajewska, Arkadiusz Listkowski, Michal Kijak, Krzysztof Nawara, Tatu Kumpulainen, Eric Vauthey, Jacek Waluk
Summary: In this study, the spectral, photophysical, and tautomeric properties of two derivatives of porphycene were characterized after substituting them with amino and nitro groups. The transitions in both tautomers were assigned using absorption, magnetic circular dichroism (MCD), and emission anisotropy measurements combined with quantum-chemical calculations. It was found that bulky t-butyl groups significantly decrease fluorescence intensity.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
Ina Fureraj, Darya S. Budkina, Eric Vauthey
Summary: Conjugated molecules with phenylethynyl building blocks exhibit torsional disorder at room temperature, but become more rigid in the excited state. The electronic absorption and emission spectra do not present a mirror-image relationship. The study shows that the influence of torsional disorder differs in solvents with different viscosities and in polymers.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Alexander M. Prophet, Kritanjan Polley, Gary J. Van Berkel, David T. Limmer, Kevin R. Wilson
Summary: The oxidation kinetics of iodide by ozone at the air-water interface is studied in single microdroplets. Molecular simulations and kinetic modeling are used to understand the underlying multiphase mechanism.
Article
Chemistry, Multidisciplinary
Rong Zhang, Jiajing Lan, Fei Wang, Shumei Chen, Jian Zhang
Summary: By utilizing 1,1'-ferrocene dicarboxylic acid as a chelating and surface protection ligand, we have synthesized multi-nuclear indium oxide clusters with varying nuclear sizes, including heptanuclear and thirteen-nuclear clusters. These clusters possess labile coordination sites, allowing for structural modification and self-assembly, resulting in the formation of various cluster structures.
Article
Chemistry, Multidisciplinary
Hui Wang, Hui Liu, Mingsen Wang, Jiaheng Hou, Yongjun Li, Yuancheng Wang, Yingjie Zhao
Summary: Two supramolecular complexes were prepared using CBs and M1, and their single-crystal structures were analyzed by SCXRD. The unexpected 1:2 self-assembly structure between M1 and CB[8] was discovered for the first time. These complexes exhibit unique photophysical properties and provide valuable information about the structure and photophysical properties of supramolecular complexes.
Article
Chemistry, Multidisciplinary
Chang-Hee Lee, Sookil Park, Sanggil Kim, Ji Young Hyun, Hyun Soo Lee, Injae Shin
Summary: The epidermal growth factor receptor (EGFR) is a cell-surface glycoprotein involved in cell proliferation and tumor development. This study used a fluorescently labeled EGFR to investigate its time-dependent endocytosis in live cells and found that appended glycans affect EGFR internalization. Additionally, the study detected sialic acid residues attached to EGFR on the live cell surface using FRET-based imaging. This research provides valuable insights into the cellular functions of EGFR.
Article
Chemistry, Multidisciplinary
Subhankar Sahu, Lokesh Kumar, Sumita Das, Dipti Gupta, Ruchi Anand
Summary: This study proposes a strategy that combines organic electronics with biosensor scaffolds to create a compact device for monitoring environmental aromatic pollution. By coupling biosensing protein MopR with an organic electrochemical transistor (OECT), a sensor module capable of efficient detection of phenol was designed. Exclusive phenol detection with minimal loss of sensitivity could be achieved in complex pollutant mixtures and real environmental samples.
Review
Chemistry, Multidisciplinary
Changseok Lee, Hyung-Joon Kang, Sungwoo Hong
Summary: The formation of C-N bonds through hydroamination reactions catalyzed by nickel hydrides has been a topic of recent interest. This approach offers a way to efficiently transform a variety of alkene and alkyne substrates into compounds enriched with C-N bonds. The review provides a concise overview of the underlying reaction mechanisms and aims to stimulate further progress in NiH-catalytic techniques and catalyst design.
Article
Chemistry, Multidisciplinary
Yueci Wu, Lu-Lu Sun, Hai-Hao Han, Xiao-Peng He, Weiguo Cao, Tony D. James
Summary: Drug-induced liver injury (DILI) is a common cause of acute liver failure in the USA and Europe, but most cases can be recovered or prevented by discontinuing the offending drug. Recent research has found that peroxynitrite (ONOO-) can be used as a potential indicator for early diagnosis of DILI, and there is an urgent need to establish a method to detect and track peroxynitrite in DILI cases. In this study, a FRET-based nano fluorescent probe CD-N-I was developed, which showed high selectivity and sensitivity in detecting peroxynitrite. The probe successfully detected exogenous peroxynitrite in live cells and endogenous peroxynitrite in APAP-induced liver injury of HepG2 cells.
Article
Chemistry, Multidisciplinary
Dmitry L. Lipilin, Mikhail O. Zubkov, Mikhail D. Kosobokov, Alexander D. Dilman
Summary: This article describes a direct photocatalytic method for the thiolation of unprotected acids, which was previously challenging. By using a thionocarbonate reagent with an N-O bond, the efficient conversion of carboxylic acids to thiols is achieved.
Article
Chemistry, Multidisciplinary
Jason Malenfant, Lucille Kuster, Yohann Gagne, Kouassi Signo, Maxime Denis, Sylvain Canesi, Mathieu Frenette
Summary: Raman microscopy can reveal compound-specific vibrational fingerprints without sample preparation. The combination of efficient theoretical calculations and a user-friendly software can accurately predict peak positions and provide match scores to assist with structure determination.
Article
Chemistry, Multidisciplinary
Jayoh A. Hernandez, Paul S. Micus, Sean Alec Lois Sunga, Luca Mazzei, Stefano Ciurli, Gabriele Meloni
Summary: Essential trace metals play crucial roles in the survival and virulence of bacterial pathogens. Helicobacter pylori requires nickel for colonization and persistence in the stomach, and NixA is an essential nickel transporter in this process. This study characterizes the selectivity and electrogenic nature of NixA-mediated nickel transport.
Article
Chemistry, Multidisciplinary
Tarali Devi, Kuheli Dutta, Jennifer Deutscher, Stefan Mebs, Uwe Kuhlmann, Michael Haumann, Beatrice Cula, Holger Dau, Peter Hildebrandt, Kallol Ray
Summary: This study emphasizes the importance of subtle electronic changes and secondary interactions in the stability of biologically relevant metal-dioxygen intermediates. It also shows that the role of the chloride ligand in stabilizing the Fe-III-(OOBu)-Bu-t moiety can extend to other anions, including the thiolate ligand.
Article
Chemistry, Multidisciplinary
Jacqueline R. Santhouse, Jeremy M. G. Leung, Lillian T. Chong, W. Seth Horne
Summary: By studying the folding kinetics and mechanism of the BdpA sequence, researchers found that altering the backbone connectivity can affect protein folding. This suggests that protein mimetic chains have a significant degree of plasticity in transitioning between unfolded and folded states.
Article
Chemistry, Multidisciplinary
Divanshu Gupta, Ralf Einholz, Holger F. Bettinger
Summary: This study presents the first direct spectroscopic evidence of a cyclic seven-membered iminoborane. Compared to linear amino-iminoboranes, this cyclic iminoborane exhibits weakened bond strength and lower Lewis acidity value. The study suggests that the reduced ring strain of cyclic iminoborane prevents nitrogen fixation but allows facile (2 + 2) cycloaddition reaction with C2H4.
Article
Chemistry, Multidisciplinary
Renny Mathew, Aniruddha Mazumder, Praveen Kumar, Julie Matula, Sharmarke Mohamed, Petr Brazda, Mahesh Hariharan, Brijith Thomas
Summary: This study reveals the packing arrangement of partially disordered nitro-perylenediimide (NO2-PDI) using a synergistic approach that combines 3D ED, ssNMR, and DFT techniques. By overcoming these challenges, this methodology opens up new avenues for material characterization, driving exciting advancements in the field.
