Switchable supramolecular ensemble for anion binding with ditopic hydrogen-bonded macrocycles

2021 ◽  
Author(s):  
Zejiang Liu ◽  
Kang Kang ◽  
Yidan Zhou ◽  
Rui Liu ◽  
Yimin Cai ◽  
...  
Keyword(s):  
Anion Binding ◽  
Anionic Species ◽  
Non Covalent Interactions ◽  
Supramolecular Ensemble ◽  
Covalent Interactions ◽  
Hydrogen Bonded

Hydrogen-bonded (H-bonded) macrocycles that recognize cationic and/or anionic species via non-covalent interactions have found a variety of applications in separation, catalysis, analysis and creation of functional molecules. One of the...

scholarly journals Smart Supramolecular Self-Assembled Nanosystem: Stimulus-Responsive Hydrogen-Bonded Liquid Crystals

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 448
Author(s):  
Bing Liu ◽  
Tao Yang ◽  
Xin Mu ◽  
Zhijian Mai ◽  
Hao Li ◽  
...  
Keyword(s):  
Structure And Properties ◽  
Self Assembling ◽  
Shape Structure ◽  
Stimulus Responsive ◽  
Inorganic Nanomaterials ◽  
Non Covalent Interactions ◽  
Self Assembled ◽  
Immense Potential ◽  
Covalent Interactions ◽  
Hydrogen Bonded

In a liquid crystal (LC) state, specific orientations and alignments of LC molecules produce outstanding anisotropy in structure and properties, followed by diverse optoelectronic functions. Besides organic LC molecules, other nonclassical components, including inorganic nanomaterials, are capable of self-assembling into oriented supramolecular LC mesophases by non-covalent interactions. Particularly, huge differences in size, shape, structure and properties within these components gives LC supramolecules higher anisotropy and feasibility. Therefore, hydrogen bonds have been viewed as the best and the most common option for supramolecular LCs, owing to their high selectivity and directionality. In this review, we summarize the newest advances in self-assembled structure, stimulus-responsive capability and application of supramolecular hydrogen-bonded LC nanosystems, to provide novel and immense potential for advancing LC technology.

scholarly journals Environment-sensitive emission of anionic hydrogen-bonded urea-derivative–acetate-ion complexes and their aggregation-induced emission enhancement

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Masaki Takahashi ◽  
Nozomu Ito ◽  
Naoki Haruta ◽  
Hayato Ninagawa ◽  
Kohei Yazaki ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Fluorescent Dyes ◽  
Urea Derivative ◽  
Aggregation Induced Emission ◽  
Emission Enhancement ◽  
Phenyl Rings ◽  
Non Covalent Interactions ◽  
Ionic Hydrogen Bonding ◽  
Covalent Interactions ◽  
Hydrogen Bonded

AbstractAnions often quench fluorescence (FL). However, strong ionic hydrogen bonding between fluorescent dyes and anion molecules has the potential to control the electronic state of FL dyes, creating new functions via non-covalent interactions. Here, we propose an approach, utilising ionic hydrogen bonding between urea groups and anions, to control the electronic states of fluorophores and develop an aggregation-induced emission enhancement (AIEE) system. The AIEE ionic hydrogen-bonded complex (IHBC) formed between 1,8-diphenylnaphthalene (p-2Urea), with aryl urea groups at the para-positions on the peri-phenyl rings, and acetate ions exhibits high environmental sensitivities in solution phases, and the FL quantum yield (QY) in ion-pair assemblies of the IHBC and tetrabutylammonium cations is more than five times higher than that of the IHBC in solution. Our versatile and simple approach for the design of AIEE dye facilitates the future development of environment-sensitive probes and solid-state emitting materials.

Strengths of non-covalent interactions in hydrogen-bonded complexes B⋯HX and halogen-bonded complexes B⋯XY (X, Y = F, Cl): an ab initio investigation

2018 ◽  
Vol 42 (13) ◽  
pp. 10548-10554 ◽  
Author(s):  
Ibon Alkorta ◽  
Anthony Legon
Keyword(s):  
Ab Initio ◽  
Force Constants ◽  
Non Covalent Interactions ◽  
Covalent Interactions ◽  
Bonded Complexes ◽  
Hydrogen Bonded

The intermolecular quadratic stretching force constants kcalc.σ of a series of hydrogen-bonded and halogen bonded complexes B⋯HX and B⋯XY, where B is N2, CO, HCCH, C2H4, H2S, PH3, HCN, or NH3.

NON COVALENT INTERACTIONS IN LARGE DIAMONDOID DIMERS IN THE GAS PHASE - A MICROWAVE STUDY

2017 ◽  
Author(s):  
Cristobal Perez ◽  
Melanie Schnell ◽  
Peter Schreiner ◽  
Norbert Mitzel ◽  
Yury Vishnevskiy ◽  
...  
Keyword(s):  
Gas Phase ◽  
Non Covalent Interactions ◽  
Covalent Interactions
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