Tunable Dimroth rearrangement of versatile 1,2,3-triazoles towards high-performance energetic materials

2021 ◽  
Author(s):  
Jean'ne M. Shreeve ◽  
Shangbiao Feng ◽  
Ping Yin ◽  
Chunlin He ◽  
Si-Ping Pang
Keyword(s):  
Energetic Materials ◽  
High Performance ◽  
Energetic Compounds ◽  
Dimroth Rearrangement ◽  
Efficient Strategy ◽  
Highly Efficient ◽  
Fused Ring ◽  
Different Types ◽  
Rearrangement Reactions

A highly efficient strategy of two different types of nitrogen-rich heterocyclic energetic compounds, featuring a single NH-bridge (-NH-) and a fused ring, was demonstrated by virtue of Dimroth rearrangement reactions...

scholarly journals Recent Advances in Synthesis and Properties of Nitrated-Pyrazoles Based Energetic Compounds

Molecules ◽  
2020 ◽  
Vol 25 (15) ◽  
pp. 3475 ◽  
Author(s):  
Shijie Zhang ◽  
Zhenguo Gao ◽  
Di Lan ◽  
Qian Jia ◽  
Ning Liu ◽  
...  
Keyword(s):  
Energetic Materials ◽  
High Performance ◽  
High Efficiency ◽  
Low Cost ◽  
Rapid Development ◽  
Development Trend ◽  
High Heat ◽  
High Energy ◽  
Heat Of Formation ◽  
Energetic Compounds

Nitrated-pyrazole-based energetic compounds have attracted wide publicity in the field of energetic materials (EMs) due to their high heat of formation, high density, tailored thermal stability, and detonation performance. Many nitrated-pyrazole-based energetic compounds have been developed to meet the increasing demands of high power, low sensitivity, and eco-friendly environment, and they have good applications in explosives, propellants, and pyrotechnics. Continuous and growing efforts have been committed to promote the rapid development of nitrated-pyrazole-based EMs in the last decade, especially through large amounts of Chinese research. Some of the ultimate aims of nitrated-pyrazole-based materials are to develop potential candidates of castable explosives, explore novel insensitive high energy materials, search for low cost synthesis strategies, high efficiency, and green environmental protection, and further widen the applications of EMs. This review article aims to present the recent processes in the synthesis and physical and explosive performances of the nitrated-pyrazole-based Ems, including monopyrazoles with nitro, bispyrazoles with nitro, nitropyrazolo[4,3-c]pyrazoles, and their derivatives, and to comb the development trend of these compounds. This review intends to prompt fresh concepts for designing prominent high-performance nitropyrazole-based EMs.

N-functionalized nitroxy/azido fused-ring azoles as high-performance energetic materials

2016 ◽  
Vol 4 (19) ◽  
pp. 7430-7436 ◽  
Author(s):  
Jiaheng Zhang ◽  
Ping Yin ◽  
Lauren A. Mitchell ◽  
Damon A. Parrish ◽  
Jean'ne M. Shreeve
Keyword(s):  
Energy Density ◽  
Energetic Materials ◽  
High Performance ◽  
High Energy ◽  
High Energy Density ◽  
Nitrate Esters ◽  
Nitrate Ester ◽  
High Energy Density Materials ◽  
Fused Ring

A series of fused ring-based nitrate esters/azides and a coupled-ring-based nitrate ester were prepared as high energy density materials.

Pyrazolo[1,5-a]pyrimidine with similar “amino-nitro-amino” arrangement characteristics to TATB: A novel heat-resistant explosive with fused structure

CrystEngComm ◽  
2021 ◽  
Author(s):  
Feng Yang ◽  
Yuangang Xu ◽  
Pengcheng Wang ◽  
Qiuhan Lin ◽  
Fu-qiang Bi ◽  
...  
Keyword(s):  
Energetic Materials ◽  
Energetic Compounds ◽  
Heat Resistant ◽  
Fused Ring

Exploring heat-resistant explosives that are easy to synthesize is a major challenge in the research of energetic materials. In this study, two novel fused-ring energetic compounds 4 and 5 were...

About the concept of synthesis of high-performance detection and positioning systems in the areas of elements falling, separated from strategic and space missiles on the trajectories of their flight during tests and regular operation

2018 ◽  
pp. 10-21
Author(s):  
G. G. Vokin
Keyword(s):  
High Performance ◽  
Physical Nature ◽  
Positioning Systems ◽  
Physical Conditions ◽  
Highly Efficient

The article describes the approach and topical issues of synthesis of highly efficient transportable systems for search and determination of coordinates in the areas of elements falling, separated from the missiles, taking into account the dislocation of pre-empted areas of fall and physical conditions in their territories. The principles of these systems are based on the rational integration of traditional and non-traditional information sensors of different physical nature, which record the moments of landing of separated parts of the missiles.

High-Performance and Low-Energy Loss Organic Solar Cells with Non-fused Ring Acceptor by Alkyl Chain Engineering

2021 ◽  
pp. 129768
Author(s):  
Dou Luo ◽  
Xue Lai ◽  
Nan Zheng ◽  
Chenghao Duan ◽  
Zhaojin Wang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Energy Loss ◽  
Organic Solar Cells ◽  
High Performance ◽  
Alkyl Chain ◽  
Low Energy ◽  
Fused Ring

scholarly journals Multiple objects tracking in the UAV system based on hierarchical deep high-resolution network

2021 ◽  
Author(s):  
Wei Huang ◽  
Xiaoshu Zhou ◽  
Mingchao Dong ◽  
Huaiyu Xu
Keyword(s):  
High Resolution ◽  
Object Tracking ◽  
High Performance ◽  
State Of The Art ◽  
Class Imbalance ◽  
Unified Framework ◽  
Multiple Objects ◽  
Tracking Process ◽  
Objects Tracking ◽  
Different Types

AbstractRobust and high-performance visual multi-object tracking is a big challenge in computer vision, especially in a drone scenario. In this paper, an online Multi-Object Tracking (MOT) approach in the UAV system is proposed to handle small target detections and class imbalance challenges, which integrates the merits of deep high-resolution representation network and data association method in a unified framework. Specifically, while applying tracking-by-detection architecture to our tracking framework, a Hierarchical Deep High-resolution network (HDHNet) is proposed, which encourages the model to handle different types and scales of targets, and extract more effective and comprehensive features during online learning. After that, the extracted features are fed into different prediction networks for interesting targets recognition. Besides, an adjustable fusion loss function is proposed by combining focal loss and GIoU loss to solve the problems of class imbalance and hard samples. During the tracking process, these detection results are applied to an improved DeepSORT MOT algorithm in each frame, which is available to make full use of the target appearance features to match one by one on a practical basis. The experimental results on the VisDrone2019 MOT benchmark show that the proposed UAV MOT system achieves the highest accuracy and the best robustness compared with state-of-the-art methods.

Development of a highly efficient extrinsic and autonomous self-healing polymeric system at low and ultra-low temperatures for high-performance applications

2021 ◽  
Vol 145 ◽  
pp. 106335
Author(s):  
Guillem Romero-Sabat ◽  
Elena Gago-Benedí ◽  
Joan Josep Roa Rovira ◽  
David González-Gálvez ◽  
Antonio Mateo ◽  
...  
Keyword(s):  
Low Temperatures ◽  
High Performance ◽  
Self Healing ◽  
Polymeric System ◽  
Highly Efficient

Highly efficient fused ring electron acceptors based on a new undecacyclic core

2021 ◽  
Author(s):  
Chun-Ru Wang ◽  
Fuwen Zhao ◽  
Dan He ◽  
Jingming Xin ◽  
Huotian Zhang ◽  
...  
Keyword(s):  
Extinction Coefficient ◽  
Energy Levels ◽  
Electron Acceptors ◽  
Highly Efficient ◽  
Fused Ring ◽  
Nanoscale Morphology

Two FREAs, IUIC-O and IUIC-T, based on an undecacyclic core were developed. IUIC-T having higher extinction coefficient, affords aligned energy levels with PBDB-T, finer nanoscale morphology and more orderly molecular...

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