Stabilization of the Neutral [25]Hexaphyrin(1.0.1.0.1.0) Radical by Hetero-Bimetal-Coordination
Chemistry. 2024 Mar 27:e202400812. doi: 10.1002/chem.202400812. Online ahead of print.ABSTRACTStabilization of hexaphyrin(1.0.1.0.1.0) (named "rosarin") in its 25π radical state is achieved using a hetero-bimetal-coordination strategy. The antiaromatic BF2 complex B-1 was first synthesized, and then rhodium ion was inserted into B-1 to produce the BF2/Rh(CO)2 mixed complex Rh-B-1 as a highly air-stable radical. The structures of B-1 and Rh-B-1 were determined by single-crystal X-ray diffractions, and the antiaromatic or radical character was identified by various spectroscopy evidence and theoretical calculations. Rh-B-1 ...
Source: Chemistry - March 27, 2024 Category: Chemistry Authors: Songlin Xue Yuting Dong Xiaojuan Lv Fengxian Qiu Yue Wang Hiroyuki Furuta Toshiharu Teranishi Fan Wu Source Type: research
Conductive Metal-Organic Framework Grown on the Nickel-Based Hydroxide to Realize High-Performance Electrochemical Glucose Sensing
Chemistry. 2024 Mar 27:e202400982. doi: 10.1002/chem.202400982. Online ahead of print.ABSTRACTGlucose holds significant importance in disease diagnosis as well as beverage quality monitoring. The high-efficiency electrochemical sensor plays a crucial role in the electrochemical conversion technology. Ni(OH)2 nanosheets are provided with high specific surface area and redox activity that are widely used in electrochemistry. Conductive metal-organic frameworks (cMOFs) perfectly combine the structural controllability of organic materials with the long-range ordering of inorganic materials that possess the characteristic of hi...
Source: Chemistry - March 27, 2024 Category: Chemistry Authors: Rongmei Zhu Yongzhen Song Jinliang Hu Keda Zhu Limei Liu Yuxuan Jiang Liru Xie Huan Pang Source Type: research
Replacement of Toxic Hydrazines in Satellite Propulsion with Greener Dinitramide-based Energetic Ionic Liquid Candidates
In this study we evidence green formulations that retain high propulsive performances. They are based on the dinitramide anion. From an initial library of 37 ammonium dinitramides 3 best candidates were selected after evaluation of their potential syntheses, calculated theoretical performances, experimental synthesis optimizations and decomposition temperatures. These three salts were then formulated to obtain acceptable sensitivities and melting points, which eventually led to only one formulation being retained: a 40:60 mixture of dimethylammonium dinitramide and ammonium dinitramide phlegmatized by 10% of glycerol.PMID:...
Source: Chemistry - March 27, 2024 Category: Chemistry Authors: Duc-Minh Le Anne Renault Arthur Delage Paul Ducos Carlos Miro-Sabate Nicolas Pelletier Emmanuel Lacote Guy Jacob Source Type: research
Robust Red-Absorbing Donor-Acceptor Stenhouse Adduct Photoswitches
Chemistry. 2024 Mar 27:e202400621. doi: 10.1002/chem.202400621. Online ahead of print.ABSTRACTDonor-Acceptor Stenhouse Adduct (DASA), a class of push-pull negative photochromes, has received large interest lately owing to its versatile synthesis, modularity and excellent photoswitching in solutions. From a technological perspective, it is imperative for this class of photoswitches to work robustly in solid state, e.g. thin films. We feature a molecular framework for the optimized design of DASAs by introducing a new thioindoline donor (D3) and assessing its performance against known 2nd generation indoline-based donors. Th...
Source: Chemistry - March 27, 2024 Category: Chemistry Authors: Abbey Meprathu Philip Marie Erskov Krogh Bo Wegge Laursen Source Type: research
CO2 photoreduction over semiconducting 2D materials with supported single atoms: recent progress and challenges
In this study, we review advancements in metal SAs confined on 2DSemi substrates, categorized into four groups: (1) metal oxide-based, (2) g-C3N4-based, (3) emerging, and (4) hybridized 2DSemi, for photocatalytic CO2 conversion over the past few years. With a particular focus on highlighting the distinct advantages of SAs-2DSemi, we delve into the synthesis of state-of-the-art catalysts, their catalytic performances, and mechanistic elucidation facilitated by experimental characterizations and theoretical calculations. Following this, we outline the challenges in this field and offer perspectives on harnessing the potentia...
Source: Chemistry - March 27, 2024 Category: Chemistry Authors: Zhangben Dai Kejun Yang Tianyi Yang Yalin Guo Jianfeng Huang Source Type: research
Perfluoroalkylation of Triarylamines by EDA complexes and Ulterior Sensitized [6 π]-Electrocyclization to Perfluoroalkylated endo-Carbazoles. Mechanistic and Photophysical Studies
Chemistry. 2024 Mar 27:e202400905. doi: 10.1002/chem.202400905. Online ahead of print.ABSTRACTBlue LEDs-irradiation of a mixture of N,N,N´,N´-tetramethylethylenediamine (TMEDA) and perfluoroalkyl iodides (RF-I) -Electron Donor Acceptor (EDA)-complex- in the presence of triphenylamines (TPAs) in an aqueous solvent mixture afforded mono-perfluoroalkylated triphenylamines (RF-TPA) in good yields. These RF-TPA were further subjected to acetone-sensitized [6π]-electrocyclization at 315 nm-irradiation affording exclusively perfluoroalkylated endo-carbazole derivatives (RF-CBz) in quantitative yields. Mechanistic studies and p...
Source: Chemistry - March 27, 2024 Category: Chemistry Authors: Ivan E Romero Sebastian Barata-Vallejo Sergio M Bonesi Al Postigo Source Type: research
A Halogen-Bonding [2]Rotaxane Shuttle for Chloride-Selective Optical Sensing
Chemistry. 2024 Mar 27:e202400952. doi: 10.1002/chem.202400952. Online ahead of print.ABSTRACTThe first example of a [2]rotaxane shuttle capable of selective optical sensing of chloride anions over other halides is reported. The rotaxane was synthesised via a chloride ion template-directed cyclisation of an isophthalamide macrocycle around a multi-station axle containing peripheral naphthalene diimide (NDI) stations and a halogen bonding (XB) bis(iodotriazole) based station. Proton NMR studies indicate the macrocycle resides preferentially at the NDI stations in the free rotaxane, where it is stabilised by aromatic donor-a...
Source: Chemistry - March 27, 2024 Category: Chemistry Authors: Hui Min Tay Andrew Docker Andrew Taylor Paul D Beer Source Type: research
Phosphoramide-Based Metal-Organic Frameworks for Effective Gas Adsorption
Chemistry. 2024 Mar 27:e202400962. doi: 10.1002/chem.202400962. Online ahead of print.ABSTRACTCost-effective and facile synthetic routes to organic ligands, along with porous materials that exhibit exceptional gas-storage properties, promise significant industrial applications. Here, a two-step synthesis of novel organophosphorus ligands without metal catalysts is reported. These ligands serve as versatile linkers for the construction of metal-organic frameworks (MOFs) incorporating various metal ions, including zinc and copper. One of the zinc-based MOFs demonstrates remarkable gas-storage properties, with a hydrogen (H2)...
Source: Chemistry - March 27, 2024 Category: Chemistry Authors: Koh Sugamata Sho Kobayashi Natsuki Amanokura Akihiro Shirai Mao Minoura Source Type: research
New Phenanthro[9,10-d]oxazole-Based Fluorophores with Hybridized Local and Charge-Transfer Characteristics for Highly Efficient Blue Non-doped OLEDs with Negligible Efficiency Roll-Off
Chemistry. 2024 Mar 27:e202400121. doi: 10.1002/chem.202400121. Online ahead of print.ABSTRACTIt is vital to develop highly efficient non-doped blue organic light-emitting diodes (OLEDs) with high color purity and low-efficiency roll-off for applications in display and lighting. Herein, two blue D-A fluorophores TPA-PO and TPA-DPO are designed and synthesized, in which phenanthro[9,10-d]oxazole (PO) acts as the acceptor and triphenylamine as the donor. TPA-PO and TPA-DPO display good thermal stability and efficient luminescence efficiency in neat film. Results based on photophysical property and theoretical calculation dem...
Source: Chemistry - March 27, 2024 Category: Chemistry Authors: Dong-Dong Xie Hao-Sen Liao Bao-Yue Wang Dong Chen Hai-Jun Chi Yan-Li Lv Yan Dong Xiao Li Source Type: research
Biomimetic Nanocomposites for Glioma Imaging and Therapy
Chemistry. 2024 Mar 27:e202304338. doi: 10.1002/chem.202304338. Online ahead of print.ABSTRACTGlioma, the most common primary brain tumor, is highly invasive and grows rapidly. As such, the survival of glioma patients is relatively short, highlighting the vital importance of timely diagnosis and treatment of glioma. However, the blood brain barrier (BBB) and the non-targeting delivery systems of contrast agents and drugs greatly hinder the effective glioma imaging and therapy. Fortunately, in recent years, investigators have constructed various biomimetic delivery platforms utilizing the exceptional advantages of biomimeti...
Source: Chemistry - March 27, 2024 Category: Chemistry Authors: Siyu Chi Caixia Wang Zhihong Liu Source Type: research
A General Concept for the Electronic and Steric Modification of 1-Metallacyclobuta-2,3-dienes: A Case Study of Group 4 Metallocene Complexes
We present the synthesis of two Ph substituted dilithiated ligand precursors for the preparation of four new 1-metallacyclobuta-2,3-dienes [rac-(ebthi)M] (M=Ti, Zr; ebthi=1,2-ethylene-1,10-bis(η5-tetrahydroindenyl)). The organolithium compounds [Li2(RC3Ph)] (1b: R = Ph, 1c: R = SiMe3) as well as the metallacycles of the general formula [rac-(ebthi)M(R1C3R2)] (2b: M=Ti, R1=R2=Ph, 2c: M=Ti, R1=Ph, R2=SiMe3; 3b: M=Zr, R1=R2=Ph; 3c: M=Zr, R1=Ph, R2=SiMe3) were fully characterised. Single crystal X-ray diffraction and quantum chemical bond analysis of the Ti and Zr complexes reveal ligand influence on the biradicaloid characte...
Source: Chemistry - March 26, 2024 Category: Chemistry Authors: Sihan Li Mirjam Schr öder Adrian Prudlik Xinzhe Shi Anke Spannenberg Jabor Rabeah Robert Francke Bj örn Corzilius Fabian Rei ß Torsten Beweries Source Type: research
One-pot Synthesis of PdCuAg and CeO2 Nanowires Hybrid with Abundant Heterojunction Interface for Ethylene Glycol Electrooxidation
Chemistry. 2024 Mar 26:e202400944. doi: 10.1002/chem.202400944. Online ahead of print.ABSTRACTIntroducing CeO2 into Pd-based nanocatalysts for electrocatalytic reactions is a good way to solve the intermediate toxicity problem and improve the catalytic performance. Here we reported a simple strategy to synthesize the PdCuAg and CeO2 nanowires hybrid via one-pot synthesis process under strong nanoconfined effect of specific surfactant as templates. Owing to the structural (ultrathin nanowires, abundant heterojunction/interfaces between metal and metal oxide) and compositional (Pd, Cu, Ag, CeO2) advantages, the hybrid showed...
Source: Chemistry - March 26, 2024 Category: Chemistry Authors: Dongping Fan Jinyu Zheng Xin Xiang Dongdong Xu Source Type: research
Surface-Enhanced Raman Scattering Using 2D Materials
Chemistry. 2024 Mar 26:e202303658. doi: 10.1002/chem.202303658. Online ahead of print.ABSTRACTThe use of surface-enhanced Raman scattering (SERS) as a technique for detecting small amounts of (bio)chemical analytes has become increasingly popular in various fields. While gold and silver nanostructures have been extensively studied as SERS substrates, the availability of other types of substrates is currently expanding the applications of this spectroscopic method. Recently, researchers have begun exploring two-dimensional (2D) materials (e.g., graphene-like nanostructures) as substrates for SERS analysis. These materials o...
Source: Chemistry - March 26, 2024 Category: Chemistry Authors: Beatriz Pinto de Sousa Sara Isabel Augusto Fateixa Tito Trindade Source Type: research
Mono-ortho-beryllated Carbodiphosphoranes: Synthesis, Structure, Bonding and Reactivity
Chemistry. 2024 Mar 26:e202400966. doi: 10.1002/chem.202400966. Online ahead of print.ABSTRACTThe reaction of organoberyllium compounds with hexaphenylcarbodiphosphorane yields mono-ortho-beryllated complexes, which feature a double dative Be=C bond. The bonding situation in these compounds together with a simple carbodiphosphorane and an N-heterocyclic carbene adduct was analysed with energy decomposition analysis in combination with natural orbital for chemical valence as well as with quantum theory of atoms-in-molecules. Furthermore, the driving forces accountable for mono-ortho-beryllation were elucidated along with th...
Source: Chemistry - March 26, 2024 Category: Chemistry Authors: Magnus Richard Buchner Lukas K Kreuzer Lewis R Thomas-Hargreaves Matthias M üller Sergei I Ivlev Gernot Frenking Sudip Pan Source Type: research
Facilitating Electron Transfer by Resizing Cyclocarbon Acceptor from C18 to C16
Chemistry. 2024 Mar 26:e202400215. doi: 10.1002/chem.202400215. Online ahead of print.ABSTRACTRecent advances in synthetic methods, combined with tip-induced on-surface chemistry, have enabled the formation of numerous cyclocarbon molecules. Here, we investigate computationally the experimentally studied C16 and C18 molecules as well as their van der Waals (vdW) complexes with several typical donor and acceptor molecules. Our results demonstrate a remarkable electron-withdrawing ability of cyclocarbon molecules. The vdW complexes of C16 and C18 exhibit a thermodynamically favorable photoinduced electron transfer (ET) from ...
Source: Chemistry - March 26, 2024 Category: Chemistry Authors: Olga A Stasyuk Alexander A Voityuk Anton J Stasyuk Source Type: research
