Hydrogen bond-driven columnar self-assembly of electroluminescent D–A–D configured cyanopyridones

2018 ◽  
Vol 6 (27) ◽  
pp. 7385-7399 ◽  
Author(s):  
D. R. Vinayakumara ◽  
Hidayath Ulla ◽  
Sandeep Kumar ◽  
Anup Pandith ◽  
M. N. Satyanarayan ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Self Assembly ◽  
Optoelectronic Properties

Flying bird-shaped cyanopyridone-based mesogens were designed and synthesized; their optoelectronic properties were studied in detail.

scholarly journals Crystalline modification of a rare earth nucleating agent for isotactic polypropylene based on its self-assembly

2018 ◽  
Vol 5 (5) ◽  
pp. 180247 ◽  
Author(s):  
Yuanming Zhang ◽  
Tingting Sun ◽  
Wei Jiang ◽  
Guangting Han
Keyword(s):  
Hydrogen Bond ◽  
Rare Earth ◽  
Isotactic Polypropylene ◽  
Self Assembly ◽  
Dendritic Structure ◽  
Nucleating Agent ◽  
The Self ◽  
Structure Evolution ◽  
Crystalline Modification ◽  
Assembly Structure

In this paper, the crystalline modification of a rare earth nucleating agent (WBG) for isotactic polypropylene (PP) based on its supramolecular self-assembly was investigated by differential scanning calorimetry, wide-angle X-ray diffraction and polarized optical microscopy. In addition, the relationship between the self-assembly structure of the nucleating agent and the crystalline structure, as well as the possible reason for the self-assembly behaviour, was further studied. The structure evolution of WBG showed that the self-assembly structure changed from a needle-like structure to a dendritic structure with increase in the content of WBG. When the content of WBG exceeded a critical value (0.4 wt%), it self-assembled into a strip structure. This revealed that the structure evolution of WBG contributed to the K β and the crystallization morphology of PP with different content of WBG. In addition, further studies implied that the behaviour of self-assembly was a liquid–solid transformation of WBG, followed by a liquid–liquid phase separation of molten isotactic PP and WBG. The formation of the self-assembly structure was based on the free molecules by hydrogen bond dissociation while being heated, followed by aggregation into another structure by hydrogen bond association while being cooled. Furthermore, self-assembly behaviour depends largely on the interaction between WBG themselves.

Hydrogen bond mediated self‐assembly of two diblock copolymers

2020 ◽  
Vol 58 (21) ◽  
pp. 3061-3068
Author(s):  
Eric R. Anderson ◽  
Vikram K. Daga ◽  
Samuel P. Gido ◽  
James J. Watkins
Keyword(s):  
Hydrogen Bond ◽  
Self Assembly ◽  
Diblock Copolymers

Hydrogen-bond enhancement triggered structural evolution and band gap engineering of hybrid perovskite (C6H5CH2NH3)2PbI4 under high pressure

2020 ◽  
Vol 22 (4) ◽  
pp. 1841-1846 ◽  
Author(s):  
Can Tian ◽  
Yongfu Liang ◽  
Wuhao Chen ◽  
Yanping Huang ◽  
Xiaoli Huang ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
High Pressure ◽  
Band Gap ◽  
Structural Evolution ◽  
Optoelectronic Properties ◽  
Band Gap Engineering ◽  
Hybrid Perovskite

Hybrid organic–inorganic perovskites (HOIPs) have gained substantial attention due to their excellent photovoltaic and optoelectronic properties.

scholarly journals Hydrogen bond guided synthesis of close-packed one-dimensional graphdiyne on the Ag(111) surface

2019 ◽  
Vol 10 (47) ◽  
pp. 10849-10852 ◽  
Author(s):  
Zhi Chen ◽  
Tao Lin ◽  
Haohan Li ◽  
Fang Cheng ◽  
Chenliang Su ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonding ◽  
Self Assembly ◽  
One Dimensional

Aided by hydrogen bonding, alkyne and oxazole functionalized precursors undergo uniform self-assembly, which serves as a template for the fabrication of one-dimensional graphdiyne-like wires on the Ag(111) surface.

Hydrogen-bond-directed self-assembly of a novel 2D→3D polythreading with finite components based on rigid ligand

2011 ◽  
Vol 994 (1-3) ◽  
pp. 1-5 ◽  
Author(s):  
Lu-Yang Qiao ◽  
Jian Zhang ◽  
Zhao-Ji Li ◽  
Ye-Yan Qin ◽  
Pei-Xiu Yin ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Self Assembly

scholarly journals Solvent-dependent self-assembly and ordering in slow-drying drop-cast conjugated polymer films

2015 ◽  
Vol 3 (38) ◽  
pp. 9842-9848 ◽  
Author(s):  
Kui Zhao ◽  
Xinhong Yu ◽  
Ruipeng Li ◽  
Aram Amassian ◽  
Yanchun Han
Keyword(s):  
Thin Films ◽  
Conjugated Polymers ◽  
Charge Transport ◽  
Polymer Films ◽  
Self Assembly ◽  
Conjugated Polymer ◽  
Optoelectronic Properties ◽  
Microstructure Development ◽  
Mechanistic Understanding ◽  
Semiconducting Thin Films

The mechanistic understanding of the intrinsic molecular self-assembly of conjugated polymers is of immense importance to control the microstructure development in organic semiconducting thin films, with a meaningful impact on charge transport and optoelectronic properties.

scholarly journals Functional properties ensue from cooperation of different interactions

2014 ◽  
Vol 70 (a1) ◽  
pp. C630-C630
Author(s):  
Giuseppe Resnati ◽  
Pierangelo Metrangolo ◽  
Giancarlo Terraneo ◽  
Gabriella Cavallo
Keyword(s):  
Hydrogen Bond ◽  
Self Assembly ◽  
Halogen Atom ◽  
Crystal Packing ◽  
Halogen Bond ◽  
Decisive Role ◽  
Solid Materials ◽  
Two Component ◽  
Confined Environment ◽  
Specific Profile

According to the definition recommended by IUPAC [1], a halogen bond (XB) occurs when there is evidence of a net attractive interaction between an electrophilic region in a halogen atom and a nucleophilic region in another atom. The halogen bond has many similarities with the hydrogen bond (HB) and here we discuss the specific profile of the two interactions. We also show how the cooperation between the two interactions afford crystalline systems possessing unique and useful properties. For instance, the diiodide, dibromide, and dichloride salts of the 1,6-bis(trimethylammonium)hexane cation (hexamethonium, HMET2+, cation) react with two equivalents of diiodine in a solid-gas reaction and the corresponding bis-trihalides (halogen bonded adducts) are formed [2]. No cavities are present in the starting dihalides and the observed behavior reveals the dynamically porous character of bis(trimethylammonium)alkane dihalides. In the obtained bis-trihalides a net of X-···H-C HBs (X=Cl, Br, I) plays a decisive role in controlling the crystal packing: Four cationic columns embrace an anionic twin column formed by stacking of trihalide dimers. When heated, these bis-trihalides lose one diiodine molecule and the virtually unknown tetrahalide dianions [I4]2-, [I2Br2] 2-, and [I2Cl2]2-are formed. These dianions are the product of the double pinning of a diiodine molecule by two halide anions via strong XBs. The last two tetrahalides were never obtained in solution. The confined environment of dynamically porous materials clearly confers useful synthetic opportunities relative to solution-state processes. Other cases are described wherein XB and HB cooperate in driving self-assembly processes which afford solid materials endowed with useful properties. For instance, we will discuss the formation of two-component supramolecular gels [3] wherein a bis-urea and a diiodoarene self-assemble via cooperative XB and HB.

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