scholarly journals Supramolecular silicone coating capable of strong substrate bonding, readily damage healing, and easy oil sliding

2019 ◽  
Vol 5 (11) ◽  
pp. eaaw5643 ◽  
Author(s):  
Meijin Liu ◽  
Zhaoyue Wang ◽  
Peng Liu ◽  
Zuankai Wang ◽  
Haimin Yao ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Polymer Coatings ◽  
Molecular Engineering ◽  
Organic Liquids ◽  
Molecular Configuration ◽  
Supramolecular Materials ◽  
Siloxane Oligomers ◽  
Damage Healing ◽  
Oil Repellent ◽  
Liquid Repellency

Polymer coatings with a combined competence of strong bonding to diverse substrates, broad liquid repellency, and readily damage healing are in substantial demand in a range of applications. In this work, we develop damage-healable, oil-repellent supramolecular silicone (DOSS) coatings to harvest abovementioned properties by molecular engineering siloxane oligomers that can self-assemble onto coated substrates via multivalent hydrogen bonding. In addition to the readily damage-healing properties provided by reversible association/dissociation of hydrogen bonding motifs, the unique molecular configuration of the siloxane oligomers on coated substrates enables both robust repellency to organic liquids and strong bonding to various substrates including metals, plastics, and even Teflon. We envision that not only DOSS coatings can be applied in a range of energy, environmental, and biomedical applications that require long-term services in harsh environmental conditions but also the design strategy of the oligomers can be adopted in the development of supramolecular materials with desirable multifunctionality.

Molecular engineering of dendritic luminogens with thermally activated delayed fluorescence and aggregation-induced emission characteristics for efficient solution-processed non-doped OLEDs

2020 ◽  
Vol 8 (35) ◽  
pp. 12272-12283
Author(s):  
Fulong Ma ◽  
Xinxin Zhao ◽  
Hefang Ji ◽  
Dongdong Zhang ◽  
Kamran Hasrat ◽  
...  
Keyword(s):  
Efficient Solution ◽  
Delayed Fluorescence ◽  
Molecular Engineering ◽  
Intersystem Crossing ◽  
Emission Characteristics ◽  
Molecular Configuration ◽  
Solution Processed ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Luminescence Efficiency

Improving the luminescence efficiency and reverse intersystem crossing of dendritic luminogens with AIE and TADF features by employing a highly twisted molecular configuration and multiple transition channels for solution-processed OLEDs.

Rheology of Silica Dispersions in Organic Liquids:  New Evidence for Solvation Forces Dictated by Hydrogen Bonding

Langmuir ◽  
2000 ◽  
Vol 16 (21) ◽  
pp. 7920-7930 ◽  
Author(s):  
Srinivasa R. Raghavan ◽  
H. J. Walls ◽  
Saad A. Khan
Keyword(s):  
Hydrogen Bonding ◽  
Organic Liquids ◽  
Solvation Forces ◽  
New Evidence

scholarly journals Universal and tunable liquid–liquid separation by nanoparticle-embedded gating membranes based on a self-defined interfacial parameter

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Xiangyu Li ◽  
Jingjing Liu ◽  
Ruixiang Qu ◽  
Weifeng Zhang ◽  
Yanan Liu ◽  
...  
Keyword(s):  
Surface Energy ◽  
High Performance ◽  
Separation Efficiency ◽  
Liquid Mixtures ◽  
Immiscible Liquid ◽  
Organic Liquids ◽  
In Situ Extraction ◽  
Low Surface Energy ◽  
Liquid Repellency ◽  
Solid Liquid

AbstractSuperwetting porous membranes with tunable liquid repellency are highly desirable in broad domains including scientific research, chemical industry, and environmental protection. Such membranes should allow for controllable droplet bouncing or spreading, which is difficult to achieve for low surface energy organic liquids (OLs). Here we develop an interfacial physical parameter to regulate the OL wettability of nanoparticle-embedded membranes by structuring synergistic layers with reconfigurable surface energy components. Under the tunable solid-liquid interaction in the aggregation-induced process, the membranes demonstrate positive/negative liquid gating regularity for polar protic liquids, polar aprotic liquids, and nonpolar liquids. Such a membrane can be employed as self-adaptive gating for various immiscible liquid mixtures with superior separation efficiency and permeation flux, even afford successive achievement of high-performance in situ extraction-back extraction coupling. This study should provide distinctive insights into intrinsic wetting behaviors and have pioneered a rational strategy to design high-performance separation materials for diverse applications.

Study on the Second-Order Nonlinear Optical Properties of [6]Helicenes with Chromophores

2013 ◽  
Vol 303-306 ◽  
pp. 2563-2566
Author(s):  
Xin Wei Zhang ◽  
Cun Li ◽  
Jun Qi Xu
Keyword(s):  
Density Functional Theory ◽  
Optical Materials ◽  
Density Functional ◽  
Nonlinear Optical ◽  
Molecular Engineering ◽  
Basis Set ◽  
Molecular Configuration ◽  
Functional Theory ◽  
B3lyp Method ◽  
Td Dft

A series of chiral [6]helicenes have been designed using the molecular engineering of organic nonlinear optical materials. The geometries of [6]helicenes 1, 2, 3, 4,5 are optimized using density functional theory (DFT-B3LYP) method at the 6-31g (d, p) basis set level. Based on the obtained stable molecular configuration, we adopt the TDHT/PM3 method and time-dependent density-functional theory (TD-DFT) to calculate the nonlinear optical (NLO) properties and electronic spectra of these molecules. Results show that the static hyperpolarizability βµ alternates between positive value and negative value, whereas it remains positive for the molecues 2 and 3 which have medium magnitudes βµ, 3.4×10-30esu and 9.6×10-30esu respectively. In molecule 5, there exists two competitive charge transfers that reduce the hyperpolarizability β.

Supramolecular Materials

MRS Bulletin ◽  
2000 ◽  
Vol 25 (4) ◽  
pp. 26-29 ◽  
Author(s):  
Jeffrey S. Moore
Keyword(s):  
Structural Control ◽  
Noncovalent Interactions ◽  
Molecular Engineering ◽  
Supramolecular Materials ◽  
The Subject ◽  
The Individual

This issue of MRS Bulletin is devoted to the subject of supramolecular materials. The term supramolecular is widely used to describe the intentional use of noncovalent interactions to bring about a desired arrangement of molecules. As the articles in this issue illustrate, this type of molecular engineering can provide structural control on the nanoscale and beyond, broadly impacting the properties of the resulting materials. The goal is to create a collection of molecules in which the whole possesses characteristics that are different and unattainable from the individual components.

scholarly journals Molecular Configuration Fixation with C–H···F Hydrogen Bonding for Thermally Activated Delayed Fluorescence Acceleration

Chem ◽  
2020 ◽  
Vol 6 (8) ◽  
pp. 1998-2008 ◽  
Author(s):  
Wenbo Yuan ◽  
Hannan Yang ◽  
Chunbo Duan ◽  
Xudong Cao ◽  
Jing Zhang ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Delayed Fluorescence ◽  
Molecular Configuration ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated
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