Polydopamine-Polyoxometalate Composites in Neutral pH Enable High-Efficiency and Ultra-Stable Organic Solar Cells via Mutual Doping Mechanism.

Heavy doping critically minimizes depletion region widths for efficient charge transport in organic solar cells (OSCs), yet systematic studies elucidating its underlying mechanisms remain scarce. To address this, two polydopamine-polyoxometalate composites (PDA-PMA and PDA-PMA(N)) are designed via innovative mutual doping pathways. PDA-PMA achieved ultrahigh doping density (1.

Synthesis, Characterization, and Properties of Phthalimide-Fused Phenanthrenone.

The synthesis, characterization, and properties of phthalimide-fused phenanthrenone () and its dicyano derivative () are reported in this study. A three-step synthetic route was established for the preparation of . Single-crystal X-ray diffraction revealed 's rigid π-conjugated framework and significant intermolecular interactions.

Reproducibility assessment of magnetic resonance spectroscopy of pregenual anterior cingulate cortex across sessions and vendors via the cloud computing platform CloudBrain-MRS.

Proton magnetic resonance spectroscopy (H-MRS) has potential in clinical diagnosis and understanding the mechanism of illnesses. However, its application is limited by the lack of standardization in data acquisition and processing across time points and between different magnetic resonance imaging (MRI) system vendors. This study examines whether metabolite concentrations obtained from different sessions, scanner models, and vendors can be reliably reproduced and combined for diagnostic analysis-an important consideration for rare disease research.

New mononuclear Dy(III) complex based on a calix[4]arene ligand with two appended salicylideneamine groups decorated with azophenyl fragments: synthesis, crystalline assembly and slow magnetic relaxation behavior.

Metal-organic single-molecule magnets (SMMs), especially single-ion magnets (SIMs), attract growing attention due to their unique magnetic behavior, which can be used for the development of computing technologies. Herein, we report the synthesis of a new mononuclear Dy(III) complex (2-Dy) using a calix[4]arene ligand (2), decorated with two lower rim-appended salicylideneamine groups, bearing azophenyl moieties. The structures of both the ligand and Dy(III) complex were thoroughly characterized in the crystalline phase.

Improve robustness to mismatched sampling rate: An alternating deep low-rank approach for exponential function reconstruction and its biomedical magnetic resonance applications.

Undersampling accelerates signal acquisition at the expense of introducing artifacts. Removing these artifacts is a fundamental problem in signal processing and this task is also called signal reconstruction. Through modeling signals as the superimposed exponential functions, deep learning has achieved fast and high-fidelity signal reconstruction by training a mapping from the undersampled exponentials to the fully sampled ones.

Ultrabright and Water-Stable Eu(III)-Based MOF Scintillators Sensitized by Dual-Antenna Ligands for Real-Time and Underwater X-Ray Imaging.

Lanthanide-based metal-organic framework (Ln-MOF) scintillators are promising for X-ray imaging owing to their structural tunability and high X-ray attenuation. However, achieving efficient triplet-sensitized scintillation remains challenging due to the inefficient energy transfer between organic ligand triplets and lanthanide centers, leading to weak radioluminescence and limited imaging resolution. Herein, we propose a dual-antenna ligand strategy by synergizing 4,4'-oxybis (benzoic acid) (Oba) and phenanthroline derivatives (1,10-phenanthroline = Phen; or Bathophenanthroline = Bphen) with Eu ions, constructing ultrabright Eu-O-Phen and Eu-O-Bphen scintillators.

Panchromatic Donor-Acceptor Hybrid Materials for Near-Infrared-Activatable Photocatalytic Detoxification of Mustard Gas Simulants.

Crystalline donor-acceptor (D-A) hybrid materials show a significant potential for photocatalytic applications, but achieving broad light absorption and high photocatalytic efficiency remains a challenge. To address this issue, herein, heteropoly blues, as electron donors, and ,'-bis(,-dimethylaminoethyl)-1,4,5,8-naphthalenediimide (NDIDMA), as electron acceptors, have been introduced to these D-A hybrid materials to enhance their light-harvesting and photocatalytic capabilities. Consequently, heteropoly blue/naphthalenediimide D-A hybrid materials HNDIDMA·[HPMoMoO]·2DMF () have been synthesized.

Fast and ultra-high shot diffusion MRI image reconstruction with self-adaptive Hankel subspace.

Multi-shot interleaved echo planar imaging is widely employed for acquiring high-resolution and low-distortion diffusion weighted images (DWI). These DWI images, however, are easily affected by motion artifacts induced by inter-shot phase variations which could be removed by enforcing the low-rankness of a huge 2D block Hankel matrix of the k-space. Successful applications have been evidenced on 4∼8 shots DWI but failure was observed on ultra-high shots, e.

Anion-π(-π) Interactions in Donor-Acceptor Hybrid Materials to Control Photochromism and Room-Temperature Phosphorescence.

Photochromic materials and room-temperature phosphorescence (RTP) are essential for applications in optoelectronics and bioimaging. Organic-inorganic hybrid materials, particularly those exhibiting donor-acceptor (D-A) characteristics through supramolecular interactions, have shown significant potential to integrate both photochromic and RTP properties. Among them, the anion-π and π-π interactions have been extensively studied; however, the role of anion-π-π interactions in hybrid materials remains largely unexplored.

Cesium-Based Molecular Perovskites With Superior Stability for High-Performance X-Ray Detection.

Metal-free molecular perovskites have shown great potential for X-ray detection due to their tunable chemical structures, low toxicity, and excellent photophysical properties. However, their limited X-ray absorption and environmental instability restrict their practical application. In this study, cesium-based molecular perovskites (MDABCO-CsX, X = Cl, Br, I) are developed by introducing Cs at the B-site to enhance X-ray absorption while retaining low toxicity.

Conjugated Naphthalenediimide-Pyridinium Salts in Donor-Acceptor Hybrid Materials for Enhanced Photochromic Properties.

As an emerging class of hybrid materials, donor-acceptor (D-A) hybrid crystals with photoactive organic and inorganic components have gradually become an ideal platform for photochromic materials. Wherein the most available organic components are electron-poor naphthalenediimide, pyridinium, and triazine derivatives, inorganic units are electron-rich polyoxometalates and metal halides. Herein, we introduced pyridinium moieties into the naphthalenediimide core by conjugated bonds so as to increase the electron deficiency of organic species for enhanced photochromic properties.

Organic Phosphonium Side-Chain Engineering in Metal Halide Glassy Scintillators for Enhanced X-Ray Dynamic Imaging.

X-ray imaging utilizing organic-inorganic hybrid metal halide (OIHMH) glassy scintillators has garnered significant attention. But their inferior radioluminescence makes achieving rapid image acquisition difficult, posing a persistent challenge for dynamic imaging. Herein, organic phosphonium halide side-chain engineering is proposed, introducing bulky aromatic rings at the alkyl chain ends, to improve the radioluminescence of OIHMHs.

A hot exciton organic glassy scintillator for high-resolution X-ray imaging.

Hot exciton organic scintillators offer promising prospects due to their efficient generation of bright triplet excitons and ultrafast response time, having potential applications in security detection and medical diagnostics. However, fabricating large-area, highly transparent scintillator screens still remains challenging, impeding the realization of high-resolution X-ray imaging. Herein, we firstly demonstrate a novel highly-transparent hot exciton organic glassy scintillator (>87% transmittance @ 450-800 nm), produced using a low-temperature melt-quenching method with 2',5'-difluoro-4,4,4'',4''-tetraphenyl-[1,1':4',1''-terphenyl]-4,4''-diamine (DTPA2F) powder.

Enhanced Stability of Melt-Processable Organic-Inorganic Hybrid Manganese Halides for X-Ray Imaging.

Mn-based metal halides scintillators with high photoluminescence quantum yield (PLQY) have recently emerged as promising large-size candidates for X-ray imaging but still remains as difficult challenge in stability and high processing temperatures. Here, three manganese halides are designed by introducing branched chains into organic cations and extending the carbon chains, namely (i-PrTPP)MnBr, (i-BuTPP)MnBr and (i-AmTPP)MnBr, successfully lowered the melting point of manganese halides to 120.2 °C.

Multiple Electron Transfer in Semiconductive Ternary D-D'-A Metal-Organic Framework for Enhanced X-Ray Detection and Imaging.

Semiconductive metal-organic frameworks (MOFs) with donor-acceptor (D-A) characteristics have garnered attractive attention due to their capacity for separating and transferring photogenerated charges, making them promising candidates for high-performance X-ray detectors. However, the low charge transfer efficiency between the metal nodes and organic ligands limits the X-ray-to-electricity conversion efficiency of these materials. Herein, an additional photoactive donor (D') is introduced by incorporating a heavy atom-containing polyoxometalate (POM) [α-SiWO] into a binary {[Ni·bcbp·(HO)]·(HO)·Cl} (Ni-bcbp, bcbp: Hbcbp·2Cl = 1,1'-bis(4-carboxyphenyl)(4,4'-bipyridinium) dichloride) MOF, resulting in a semiconductive ternary D-D'-A framework {[Ni(bcbp)·(HO)·(DMA)]·(SiWO)} (SiW@Ni-bcbp, DMA: dimethylacetamide).

Correction: Halogen-bonded charge-transfer co-crystal scintillators for high-resolution X-ray imaging.

[This corrects the article DOI: 10.1039/D4SC00735B.].

Halogen-bonded charge-transfer co-crystal scintillators for high-resolution X-ray imaging.

The development of high-quality organic scintillators encounters challenges primarily associated with the weak X-ray absorption ability resulting from the presence of low atomic number elements. An effective strategy involves the incorporation of halogen-containing molecules into the system through co-crystal engineering. Herein, we synthesized a highly fluorescent dye, 2,5-di(4-pyridyl)thiazolo[5,4-]thiazole (PyTTz), with a fluorescence quantum yield of 12.

Mechanochemical Synthesis of Cuprous Complexes for X-ray Scintillation and Imaging.

Cuprous complex scintillators show promise for X-ray detection with abundant raw materials, diverse luminescent mechanisms, and adjustable structures. However, their synthesis typically requires a significant amount of organic solvents, which conflict with green chemistry principles. Herein, we present the synthesis of two high-performance cuprous complex scintillators using a simple mechanochemical method for the first time, namely [CuI(PPh)R] (R = 4-phenylpyridine hydroiodide (PH, Cu-1) and 4-(4-bromophenyl)pyridine hydroiodide (PH-Br, Cu-2).

Synthesis, Characterization, and Properties of Sila-Annulated Phenanthrene Imides.

A series of sila-annulated phenanthrene imides were synthesized through a three-step synthetic route, which represent a hybrid class of biphenyl-based π-conjugated molecules incorporating an imide unit and silole. A comprehensive investigation of their structural, photophysical, and electronic properties was studied by experiment and theoretical calculations. Notably, sila-annulated phenanthrene imides with significant aggregation-induced emission (AIE) properties were observed.

Polyoxometalate/-triazine hybrid heterostructures with ultrafast photochromic properties.

As an emerging class of hybrid complexes, donor-acceptor (D-A) hybrid heterostructures, which combine the advantages of both organic and inorganic photoactive components, provide excellent platforms for the fabrication of photochromic materials with enhanced photo-responsive performances. Herein, four novel hybrid heterostructures, namely HTPT·(PWO)·2NMP (1), (HTPT)·(PWO) (2), (HTPT)·(SiWO)·2Cl·2MeCN (3), and HTPT·(HPMoO)·Cl·3NMP (4) (TPT is tri(4-pyridyl)--triazine, NMP is -methylpyrrolidone), have been synthesized and characterized. Benefitting from the strong interactions (anion-π interactions) and matching electron energy levels between the donors and acceptors, some of them exhibited ultrafast photochromic behaviour even up to 1 second.

Magnetic Resonance Spectroscopy Quantification Aided by Deep Estimations of Imperfection Factors and Macromolecular Signal.

Objective: Magnetic Resonance Spectroscopy (MRS) is an important technique for biomedical detection. However, it is challenging to accurately quantify metabolites with proton MRS due to serious overlaps of metabolite signals, imperfections because of non-ideal acquisition conditions, and interference with strong background signals mainly from macromolecules. The most popular method, LCModel, adopts complicated non-linear least square to quantify metabolites and addresses these problems by designing empirical priors such as basis-sets, imperfection factors.

CloudBrain-MRS: An intelligent cloud computing platform for in vivo magnetic resonance spectroscopy preprocessing, quantification, and analysis.

Magnetic resonance spectroscopy (MRS) is an important clinical imaging method for diagnosis of diseases. MRS spectrum is used to observe the signal intensity of metabolites or further infer their concentrations. Although the magnetic resonance vendors commonly provide basic functions of spectrum plots and metabolite quantification, the spread of clinical research of MRS is still limited due to the lack of easy-to-use processing software or platform.

Radial magnetic resonance image reconstruction with a deep unrolled projected fast iterative soft-thresholding network.

Radially sampling of magnetic resonance imaging (MRI) is an effective way to accelerate the imaging. How to preserve the image details in reconstruction is always challenging. In this work, a deep unrolled neural network is designed to emulate the iterative sparse image reconstruction process of a projected fast soft-threshold algorithm (pFISTA).

Naphthalenediimide/Iodobismuthate Hybrid Heterostructures: Water Resistance and Long-Lived Charge-Separated States.

Organic-inorganic hybrid iodobismuthate perovskites have become promising semiconductive materials for their environmentally friendly and light-harvesting characteristics. However, their low-dimensional bismuth-iodide skeletons result in poor charge-separation efficiency, limiting their application in optoelectronic devices. To address this issue, the donor-acceptor (D-A) heterostructures have been introduced to the iodobismuthate hybrid materials by incorporating an electron-deficient ,'-bis(4-aminoethyl)-1,4,5,8-naphthalene diimide (NDIEA) as the electron acceptor and organic counterpart.