scholarly journals Construction of Supramolecular Polymers with Different Topologies by Orthogonal Self-Assembly of Cryptand–Paraquat Recognition and Metal Coordination

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 952
Author(s):  
Kai Wang ◽  
Yuan-Guang Shao ◽  
Feng-Zhi Yan ◽  
Zibin Zhang ◽  
Shijun Li
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Efficient Method ◽  
Self Assembly ◽  
Polymeric Materials ◽  
Proton Nuclear Magnetic Resonance ◽  
Supramolecular Polymers ◽  
Pyridyl Group ◽  
The Third ◽  
And Diffusion

Recently, metal-coordinated orthogonal self-assembly has been used as a feasible and efficient method in the construction of polymeric materials, which can also provide supramolecular self-assembly complexes with different topologies. Herein, a cryptand with a rigid pyridyl group on the third arm derived from BMP32C10 was synthesized. Through coordination-driven self-assembly with a bidentate organoplatinum(II) acceptor or tetradentate Pd(BF4)2•4CH3CN, a di-cryptand complex and tetra-cryptand complex were prepared, respectively. Subsequently, through the addition of a di-paraquat guest, linear and cross-linked supramolecular polymers were constructed through orthogonal self-assembly, respectively. By comparing their proton nuclear magnetic resonance (1H NMR) and diffusion-ordered spectroscopy (DOSY) spectra, it was found that the degrees of polymerization were dependent not only on the concentrations of the monomers but also on the topologies of the supramolecular polymers.

Effect of Molecular Structure on Soot Formation Characteristics of Aviation Turbine Fuels

1989 ◽  
Vol 111 (1) ◽  
pp. 77-83 ◽  
Author(s):  
O¨. L. Gu¨lder ◽  
B. Glavincˇevski ◽  
S. Das
Keyword(s):  
Molecular Structure ◽  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Diffusion Flames ◽  
Soot Formation ◽  
Smoke Point ◽  
Proton Nuclear Magnetic Resonance ◽  
Nmr Spectrometry ◽  
Laminar Diffusion ◽  
And Diffusion

The smoke point has been shown to be quantitatively related to the molecular structure of hydrocarbon fuels. A fast technique of determining the molecular composition of commercial and experimental fuels, in terms of carbon type structure, by using proton nuclear magnetic resonance (1H NMR) spectrometry, has been described. By measuring the smoke point soot yields of a laminar diffusion flame with a group of fuels—all having a constant hydrogen-to-carbon ratio—it has been shown that neither the smoke point nor the hydrogen-to-carbon ratio alone can describe the sooting propensity of turbine fuels. Obtained results indicate that smoke points and hydrogen-to-carbon ratio are complementary to each other in describing the sooting propensities of turbine fuels. This has been further tested using the available data in literature obtained from gas turbine combustors and diffusion flames.

scholarly journals N-[7-Chloro-4-[4-(phenoxymethyl)-1H-1,2,3-triazol-1-yl] quinoline]-acetamide

Molbank ◽  
10.3390/m1213 ◽  
2021 ◽  
Vol 2021 (2) ◽  
pp. M1213
Author(s):  
Paolo Coghi ◽  
Jerome P. L. Ng ◽  
Ali Adnan Nasim ◽  
Vincent Kam Wai Wong
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Quantum Coherence ◽  
Biologically Active ◽  
Proton Nuclear Magnetic Resonance ◽  
Dipolar Cycloaddition ◽  
Heteronuclear Single Quantum Coherence ◽  
Pharmacokinetic Properties ◽  
Nuclear Magnetic

The 1,2,3-triazole is a well-known biologically active pharmacophore constructed by the copper-catalyzed azide–alkyne cycloaddition. We herein reported the synthesis of 4-amino-7-chloro-based [1,2,3]-triazole hybrids via Cu(I)-catalyzed Huisgen 1,3-dipolar cycloaddition of 4-azido-7-chloroquinoline with an alkyne derivative of acetaminophen. The compound was fully characterized by Fourier-transform infrared (FTIR), proton nuclear magnetic resonance (1H-NMR), carbon-13 nuclear magnetic resonance (13C-NMR), heteronuclear single quantum coherence (HSQC), ultraviolet (UV) and high-resolution mass spectroscopies (HRMS). This compound was screened in vitro with different normal and cancer cell lines. The drug likeness of the compound was also investigated by predicting its pharmacokinetic properties.

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