Molecular design and fabrication of PIM-1/polyphosphazene blend membranes with high performance for CO2/N2 separation

2021 ◽  
pp. 119764
Author(s):  
Ali K. Sekizkardes ◽  
Samir Budhathoki ◽  
Lingxiang Zhu ◽  
Victor Kusuma ◽  
Zi Tong ◽  
...  
Keyword(s):  
High Performance ◽  
Molecular Design ◽  
Blend Membranes

Hierarchical molecular design of high-performance infrared nonlinear Ag2HgI4 material by defect engineering strategy

2021 ◽  
pp. 100432
Author(s):  
Can Yang ◽  
Xian Liu ◽  
Chunlin Teng ◽  
Xiaohong Cheng ◽  
Fei Liang ◽  
...  
Keyword(s):  
High Performance ◽  
Molecular Design ◽  
Defect Engineering ◽  
Engineering Strategy

scholarly journals Molecular design revitalizes the low-cost PTV-polymer for highly efficient organic solar cells

2021 ◽  
Author(s):  
Junzhen Ren ◽  
Pengqing Bi ◽  
Jianqi Zhang ◽  
Jiao Liu ◽  
Jingwen Wang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
High Performance ◽  
Molecular Design ◽  
Raw Materials ◽  
Low Cost ◽  
Stable Conformation ◽  
Chemical Structures ◽  
Aggregation Effect ◽  
Industrialization Process

Abstract Developing photovoltaic materials with simple chemical structures and easy synthesis still remains a major challenge in the industrialization process of organic solar cells (OSCs). Herein, an ester substituted poly(thiophene vinylene) derivative, PTVT-T, was designed and synthesized in very few steps by adopting commercially available raw materials. The ester groups on the thiophene units enable PTVT-T to have a planar and stable conformation. Moreover, PTVT-T presents a wide absorption band and strong aggregation effect in solution, which are the key characteristics needed to realize high performance in non-fullerene-acceptor (NFA)-based OSCs. We then prepared OSCs by blending PTVT-T with three representative fullerene- and NF-based acceptors, PC71BM, IT-4F and BTP-eC9. It was found that PTVT-T can work well with all the acceptors, showing great potential to match new emerging NFAs. Particularly, a remarkable power conversion efficiency of 16.20% is achieved in a PTVT-T:BTP-eC9-based device, which is the highest value among the counterparts based on PTV derivatives. This work demonstrates that PTVT-T shows great potential for the future commercialization of OSCs.

Application of Polycarboxylate Superplasticizer in the Concrete

2017 ◽  
Vol 898 ◽  
pp. 2076-2080 ◽  
Author(s):  
Xing Qi Huang ◽  
Xiao Rong Li ◽  
Da Wei Zhang ◽  
Chang Jun Xue ◽  
Ai Qin Zhang
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
Molecular Design ◽  
High Water ◽  
Repulsive Force ◽  
Reducing Agent ◽  
Functional Design ◽  
Agent Based ◽  
Type Water ◽  
Low Dosage

Compared with the traditional water reducer, polycarboxylicwater-reducing agent exhibits the advantages of high water-reducing rate, cement paste fluidity and low slump loss, etc. The structure of polycarboxylates water reducing agent molecular is comb type. Water reducing agent can be used in the molecular design because it has high water reducing rate, low dosage, good slump stability, and have great potential in increase strength. In recent years, it has attracted many researchers' attention. Water reducing agent can block or destroy cement granular flocculation structure, through the surface function, complexation, electrostatic repulsion force and stereo repulsive force. Research on water reducing agent based on the application of poly carboxylic acid can realize functional design of water reducing agent, so as to promote the development of high-performance concrete.

Supramolecular Interactions in Aromatic Structures for Non-Optical and Optical Chemosensors of Explosive Chemicals

2021 ◽  
Vol 317 ◽  
pp. 202-207
Author(s):  
Juan Matmin ◽  
Nur Fatiha Ghazalli ◽  
Fazira Ilyana Abdul Razak ◽  
Hendrik O. Lintang ◽  
Mohamad Azani Jalani
Keyword(s):  
Hydrogen Bonding ◽  
High Performance ◽  
Molecular Design ◽  
Optical Sensing ◽  
Green Emission ◽  
Supramolecular Interactions ◽  
Side Chain ◽  
Optical Chemosensors ◽  
Random Aggregate ◽  
Metal Metal

The scientific investigation based on the molecular design of aromatic compounds for high-performance chemosensor is challenging. This is because their multiplex interactions at the molecular level should be precisely determined before the desired compounds can be successfully used as sensing materials. Herein, we report on the molecular design of chemosensors based on aromatic structures of benzene as the organic motif of benzene-1,3,5-tricarboxamides (BTA), as well as the benzene pyrazole complexes (BPz) side chain, respectively. In the case of BTA, the aromatic benzene acts as the centre to allow the formation of π–π stacking for one-dimensional materials having rod-like arrangements that are stabilized by threefold hydrogen bonding. We found that when nitrate was applied, the rod-like BTA spontaneously formed into a random aggregate due to the deformation of its hydrogen bonding to form inactive nitroso groups for non-optical sensing capability. For the optical chemosensor, the aromatic benzene is decorated as a side-chain of BPz to ensure that cage-shaped molecules make maximum use of their centre providing metal-metal interactions for fluorescence-based sensing materials. In particular, when exposed to benzene, Cu-BPz displayed a blue-shift of its original emission band from 616 to 572 nm (Δ = 44 nm) and emitted bright orange to green emission colours. We also observe a different mode of fluorescence-based sensing materials for Au-BPz, which shows a particular quenching mechanism resulting in 81% loss of its original intensity on benzene exposure to give less red-orange emission (λ = 612 nm). The BTA and BPz synthesized are promising high-performance supramolecular chemosensors based on the non-optical and optical sensing capability of a particular interest analyte.

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