Qiuhua Liu

ORCID: 0000-0001-7476-4634
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Research Areas
  • X-ray Diffraction in Crystallography
  • Crystallization and Solubility Studies
  • Porphyrin and Phthalocyanine Chemistry
  • Metal-Catalyzed Oxygenation Mechanisms
  • Crystallography and molecular interactions
  • Hemoglobin structure and function
  • Drilling and Well Engineering
  • Surface Chemistry and Catalysis
  • Photosynthetic Processes and Mechanisms
  • Oil and Gas Production Techniques
  • Heme Oxygenase-1 and Carbon Monoxide
  • Supramolecular Chemistry and Complexes
  • Evaluation and Optimization Models
  • Reservoir Engineering and Simulation Methods
  • Domain Adaptation and Few-Shot Learning
  • Medical Imaging and Analysis
  • Organometallic Complex Synthesis and Catalysis
  • Conducting polymers and applications
  • Advanced Sensor and Energy Harvesting Materials
  • Porphyrin Metabolism and Disorders
  • Machine Learning and Algorithms
  • Magnetism in coordination complexes
  • Advanced Neural Network Applications
  • Supramolecular Self-Assembly in Materials
  • Advanced Decision-Making Techniques

Hunan University of Science and Technology
2012-2024

University of South Africa
2024

Soochow University
2019-2023

Powerchina Huadong Engineering Corporation (China)
2010-2023

Zhangjiagang First People's Hospital
2019-2023

PowerChina (China)
2020-2023

Nanjing Institute of Technology
2007-2022

Guangxi University of Chinese Medicine
2007-2022

Lanzhou University of Technology
2021

Schlumberger (British Virgin Islands)
2018-2021

Flexible strain sensors have been widely used in wearable electronic devices for body physical parameter capturing. However, regardless of the stretchability sensing material, resolution small changes or hysteresis between loading/unloading states has always limited various applications these sensors. In this paper, a microfluidic flexible sensor was achieved by introducing liquid metal eutectic gallium indium (EGaIn) embedded into wave-shaped microchannel elastomeric matrix (300 μm width ×...

10.1021/acsami.0c04709 article EN ACS Applied Materials & Interfaces 2020-04-21

Triplet–triplet energy transfer (EnT) is a fundamental activation pathway in photocatalysis. In this work, we report the mechanistic origins of triplet excited state carbazole-cyanobenzene donor–acceptor (D–A) fluorophores EnT-based photocatalytic reactions and demonstrate key factors that control accessibility 3LE (locally state) 3CT (charge-transfer via combined photochemical transient absorption spectroscopic study. We found order between 1CT (charge singlet dictates 3LE/3CT for EnT,...

10.1021/jacs.8b07271 article EN Journal of the American Chemical Society 2018-10-02

Abstract As an important branch of flexible electronics, pressure sensors that combine unique advantages including light weight, flexibility, and low‐cost, have drawn extensive attention owing to their great potential for biomedical applications. In this review, the current state‐of‐the‐art concerning common substrate active materials, sensing mechanism, key parameters, sensitivity optimization strategies, promising applications from ex vivo in which results distinct requirements materials...

10.1002/admi.202000743 article EN Advanced Materials Interfaces 2020-07-19

Context plays an important role when performing classification, and in this paper we examine context from two perspectives. First, the classification of items within a single task is placed distinct concurrent or previous tasks (multiple data collections). This referred to as multi-task learning (MTL), implemented here statistical manner, using simplified form Dirichlet process. In addition, many one has simultaneous access all unlabeled that must be classified, therefore there opportunity...

10.1109/tpami.2008.296 article EN IEEE Transactions on Pattern Analysis and Machine Intelligence 2008-12-24

Abstract Ciprofloxacin (CIP) is a widely used broad‐spectrum antibiotic and has been associated with various side effects, making its accurate detection crucial for patient safety, drug quality compliance, environmental food safety. This study presents the development of ternary nucleotide–lanthanide coordination nanoprobe, GMP‐Tb‐BDC (GMP: guanosine 5′‐monophosphate, BDC: 2‐amino‐1,4‐benzenedicarboxylic acid), sensitive ratiometric CIP. The nanoprobe was constructed by incorporating...

10.1002/bio.4667 article EN Luminescence 2024-01-04

Abstract For more comprehensive monitoring human state of motion, it is necessary to sense multidimensional stimulus information. In this paper, we reported a supersensitive flexible sensor based on Ag/PDMS composites with sensing abilities strain and force. The fabrication method simple rapid, which only need physically grinding the silver particles mixing liquid PDMS. has excellent performances in detection. gauge factor can reach as high 939 when was stretched 36%, minimum resolution for...

10.1038/s41598-020-61658-z article EN cc-by Scientific Reports 2020-03-13

Ruffle- and dome-type porphyrins were developed as model systems to investigate the role of deformation mode degree distortion in heme. Their crystal structures revealed that increases, cavity size can be contracted ruffle expanded dome mode, exceed limit free metal ions from fourth period (see scheme).

10.1002/chem.201200722 article EN Chemistry - A European Journal 2012-05-15

It was demonstrated experimentally that nonplanar iron porphyrins can be induced to undergo a conversion in their electronic configuration form cross-hybrid transition by compressing the macrocyclic core size for central metal ion. A series of monostrapped were used as model systems, and properties probed using electron spin resonance differential spectral analyses. These results indicate formation stage is related stability high-valence state potent oxidizing ability

10.1021/ol303419b article EN Organic Letters 2013-01-16

Semi-supervised learning and active are considered for UXO detection.Semi-supervised algorithms designed using both labeled unlabeled data, where here data corresponds to sensor signatures which the identity of buried item (UXO/non-UXO) is known; one only has access corresponding data.Active used define would be most informative improve classifier design, if associated label could acquired (where sensing by excavation).A graph-based semi-supervised algorithm proposed, employing idea a random...

10.1109/tgrs.2008.920468 article EN IEEE Transactions on Geoscience and Remote Sensing 2008-08-04

A series of 5,15-meso,meso-strapped nonplanar porphyrins with different degrees ruffling distortion, as a model system, have been synthesized and characterized. The spectral red-shift the was experimentally demonstrated to mainly originate from hybrid orbital deformation (HOD) effect due distortion in tetrapyrrole macrocycle, which confirmed previous explanations phenomenon.

10.1021/ol100434w article EN Organic Letters 2010-03-22

Background Gallbladder carcinoma (GBC) is a biliary tract tumor with high mortality rate. The objectives of this study were to explore the risk factors GBC in patients gallstones and establish effective screening indicators. Methods A total 588 from medical centers two different regions China included defined as internal test samples external validation samples, respectively. We retrospectively reviewed differences clinicopathologic data find independent that affect occurrence GBC. Then, we...

10.3389/fonc.2023.1037194 article EN cc-by Frontiers in Oncology 2023-02-27

Sequential C-H functionalization of molecules containing multiple bonds can efficiently lead to structural diversity. Herein we present the first chelation-assisted sequential α-/β-C-H E-styrenes with simple alkenes and alkynes in excellent regio- stereo-selectivity. The process involves α by six-membered exo-cyclopalladation result tri- tetrasubstituted 1,3-dienes β through seven-membered endo-cyclopalladation produce tetra- pentasubstituted 1,3,5-trienes up 97 % yield >99/1 E/Z...

10.1002/anie.202315273 article EN Angewandte Chemie International Edition 2024-01-13

A tweezer-type bis(zinc porphyrin) bridged by benzo orthocarbonates was synthesized and applied as a molecular conformational switch under regulation of DABCO Cu+ ion. The property has been confirmed 1H NMR, UV−vis spectral titration, HR-MS spectra method.

10.1021/ol802976h article EN Organic Letters 2009-03-23

The core size of the porphyrin macrocycles was closely related to their stability different electron structure in central metal ion. Cobalt(II) ions can undergo a conversion configurations upon N4 contraction 0.05 Å nonplanar porphyrins, and these still maintain low spin forms after before conversion. structural fine-tuning induce appearance cross-hybrid stage [d(x(2)-y(2))sp(2) ↔ d(z(2))sp(2)] based on quadrilateral coordination planar core. results indicate that configuration plays key...

10.1021/acs.jpcb.5b08431 article EN The Journal of Physical Chemistry B 2015-10-13

A heme oxygen binding behavior was described through a unique geometric and electronic comparison of zinc porphyrin complexes. In this work, charge transfer model for saddled metalloporphyrin complexes outlined the push effects ring nonplanarity axial imidazole, pull effect dioxygen. The origin role horizontal (ring nonplanarity) its relationship to vertical (axial ligand) push/pull contribution dioxygen were considered from perspectives crystal structures, theoretical calculations,...

10.1021/acs.inorgchem.8b03219 article EN Inorganic Chemistry 2019-01-29

MoS2 nanomaterials and ionic liquids (ILs) have attracted tremendous interest as the prime electrodes electrolytes of supercapacitors. However, corresponding charge storage mechanisms not yet been clearly understood. Herein, we study molecular-level energy electrode in imidazolium liquid ([BMI+][PF6−]) using molecular dynamics (MD) simulation. The electric double-layer (EDL) structures [BMI+][PF6−] are comprehensively studied terms number density, MD snapshots, separation coefficient,...

10.3390/pr11020380 article EN Processes 2023-01-25

The path less taken: Copolymerization of imines and carbon monoxide has long been highly desirable as a route to synthesize polypeptides, but difficult implement because the lack appropriate catalysts. This reaction now realized for first time by using simple cobalt catalyst (see scheme). Supporting information this article is available on WWW under http://www.wiley-vch.de/contents/jc_2002/2007/z700646_s.pdf or from author. Please note: publisher not responsible content functionality any...

10.1002/anie.200700646 article EN Angewandte Chemie International Edition 2007-07-03
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