AI Article Synopsis
- A new series of 1,3,5-triaryl-2-pyrazolines with varying alkyloxy chain lengths (1b-12b) was created and analyzed using IR, NMR, and GC-MS techniques.
- The study explored how the length of the alkyloxy chains influences the absorption and fluorescence properties, revealing that all compounds fluoresced in the blue region but their emission intensity was notably affected.
- The absorption and emission maxima were found to fall within the ranges of 337-364nm and 454-464nm, respectively, and the impact of a fluorine substituent on the aryl ring at the 3-position was also examined for its effect
Article Abstract
A series of new 1,3,5-triaryl-2-pyrazolines (1b-12b) having one to twelve carbon alkyloxy side chains were synthesized and characterized on the basis of their spectral (IR, (1)H &(13)C NMR and GC-MS) and microanalytical data. The UV-Vis and emission spectroscopy was used to study the effect of alkyloxy chain length on absorption and fluorescence properties of 1b-12b. All the compounds showed fluorescence in the blue region of the visible spectrum. Interestingly, the alkyloxy chain length strongly affects the emission intensity of 1,3,5-triaryl-2-pyrazoline framework without causing any major blue- or red-shift in the emission wavelength (λmax(em)). The absorption and emission maxima (λmax(abs) &λmax(em)) for compounds (1b-12b) were observed in the range of 337-364nm and 454-464nm, respectively. Furthermore, the effect of fluorine substituent on aryl ring present at 3-position of pyrazoline moiety on fluorescence properties is also discussed.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.saa.2014.02.025 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Controlling nano- and microfilament morphology by strategically placing chiral centers in the side chains of bent-core molecules.
Mater Horiz
November 2024
Advanced Materials and Liquid Crystal Institute, Kent State University, Kent, OH 44242, USA.
Article Synopsis
- The study explores how specific arrangements of chiral centers in bent-core molecules influence the creation of various filament morphologies at the nanoscale.
- The research highlights the unexpected coexistence of different shapes, such as flat nanoribbons and twisted microfilaments, indicating spontaneous changes in structure along the filament's length.
- Findings reveal that adjusting the number and location of chiral centers can lead to a complete transformation of filament types, showcasing a wide diversity in morphology from flat ribbons to complex helical structures.
A new homologous series of semi-conducting liquid crystals based on phenyl-anthracene: synthesis and effect of the alkyloxy terminal chain on charge transport and photoconductive properties.
Phys Chem Chem Phys
October 2024
Univ. Littoral Côte d'Opale, UR 4476-UDSMM-Unitéde Dynamique et Structure de Matériaux Moléculaires, 59140 Dunkerque, France.
π-Conjugated systems are the key to the charge transport properties of organic semiconductors. Four multifunctional mesogenic materials were designed and synthesised from 2-amino anthracene and -hydroxybenzaldehyde. Each material contains a central, rigid phenyl-anthracene core and one flexible alkyloxy chain with different lengths based on the concept of combining liquid crystal (LC) materials featuring facile processability, highly ordered alignment, and effective charge transport.
View Article and Find Full Text PDFSynthesis and Validation of TRIFAPYs as a Family of Transfection Agents for Therapeutic Oligonucleotides.
Biomolecules
March 2024
Department of Biochemistry and Physiology, School of Pharmacy and Food Sciences, University of Barcelona, 08028 Barcelona, Spain.
Transfection agents play a crucial role in facilitating the uptake of nucleic acids into eukaryotic cells offering potential therapeutic solutions for genetic disorders. However, progress in this field needs the development of improved systems that guarantee efficient transfection. Here, we describe the synthesis of a set of chemical delivery agents (TRIFAPYs) containing alkyl chains of different lengths based on the 1,3,5-tris[(4-alkyloxy-1pyridinio)methyl]benzene tribromide structure.
View Article and Find Full Text PDFIonic Liquid Crystals Based on Loop-Shaped Copper(I) Complexes.
Inorg Chem
April 2024
Département des Matériaux Organiques, Institut de Physique et de Chimie des Matériaux de Strasbourg (UMR 7504), Université de Strasbourg/CNRS, 23 Rue du Loess, F-67000 Strasbourg, France.
This paper describes the synthesis and characterization of liquid crystals based on loop-shaped cationic copper(I) complexes of a multidentate ligand. Their synthesis involves the one-pot reaction of an alkyloxy-decorated pyridine-aldehyde unit with a diamine (2,2'-(ethylenedioxy)bis(ethylamine)) spacer to form in situ a pyridine-imine quadridentate-N-donor ligand, L, which is able to chelate a copper(I) center associated with various noncoordinating anions. All of these compounds were characterized by NMR, IR, and electronic absorption spectroscopy, and more particularly by X-ray diffraction and mass spectroscopy, enabling unambiguous assignment of the [ML] mononuclear nature of the cationic components.
View Article and Find Full Text PDFTuning Crystallinity and Stacking of Two-Dimensional Covalent Organic Frameworks through Side-Chain Interactions.
J Am Chem Soc
October 2023
Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States.
Two-dimensional covalent organic frameworks (2D COFs) form as layered 2D polymers whose sheets stack through high-surface-area, noncovalent interactions that can give rise to different interlayer arrangements. Manipulating the stacking of 2D COFs is crucial since it dictates the effective size and shape of the pores as well as the specific interactions between functional aromatic systems in adjacent layers, both of which will strongly influence the emergent properties of 2D COFs. However, principles for tuning layer stacking are not yet well understood, and many 2D COFs are disordered in the stacking direction.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!