Synthesis and characterization of various Schiff bases for non-linear optical applications

Bhat, Kamala N.; Chang, K.J.; Aggarwal, Mohan D.; Wang, W.S.; Penn, Benjamin G.; Frazier, Donald O.

doi:10.1016/0254-0584(96)80066-6

Cited by 48 publications

(10 citation statements)

References 7 publications

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“…Steric hindrance was an interaction that influenced the conformation in the organic molecules. Steric hindrance was a critical factor to determine the reactivity and stability in molecular structure 13 . The molecule has less reactive in bulky molecules 14 .…”

Section: Fig 5 Skeletal Formula Of Lyral Isomers (A) Z-lyral (B) E-lyralmentioning

confidence: 99%

Synthesis and Mass Spectrum Characterization of Lyrame Schiff Base for Synthetic Ingredients in Perfumes Industry

et al. 2018

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Fragrance was a common material in human daily life. It has unique property, especially in odor. Lyrame was a synthetic precursor that was added to fragrance to increase fragrance stability and make odor last longer. Lyrame can be synthesized by using simple condensation method. This method was effective and low cost. The synthesis of lyrame uses lyral and methyl anthranilate as a precursor. The weighting methyl anthranilate was mixed to lyral solution, then heated and stirred at temperature 110 ± 50C for 30 minutes. The characterization of lyrame comprised organoleptics test and chemical structure. The organoleptics for product was color test. The chemical structure was analyzed by gas chromatography-mass spectrometry (GC-MS). Based on result from experiment, color of lyrame product was light yellow. The color of product depends on time of synthesis and concentration of precursor. The mass fragmentation pattern exhibiting the lyrame has been synthesized successfully.

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Section: Fig 5 Skeletal Formula Of Lyral Isomers (A) Z-lyral (B) E-lyralmentioning

confidence: 99%

Synthesis and Mass Spectrum Characterization of Lyrame Schiff Base for Synthetic Ingredients in Perfumes Industry

et al. 2018

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“…Following the recommendation of IUPAC, they shall be considered synonymous with azomethines [ 35 ]. The overwhelming majority of Schiff bases are artificially obtained in condensation reactions of primary amines with aldehydes or ketones [ 36 , 37 , 38 ]. However, they could also be found in natural products in which corrin-related compounds are present [ 39 ].…”

Section: Introductionmentioning

confidence: 99%

Comprehensive Empirical Model of Substitution—Influence on Hydrogen Bonding in Aromatic Schiff Bases

Krupka

Pocheć

Panek

et al. 2022

IJMS

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In this work, over 500 structures of tri-ring aromatic Schiff bases with different substitution patterns were investigated to develop a unified description of the substituent effect on the intramolecular hydrogen bridge. Both proximal and distal effects were examined using Density Functional Theory (DFT) in the gas phase and with solvent reaction field (Polarizable Continuum Model (PCM) and water as the solvent). In order to investigate and characterize the non-covalent interactions, a topological analysis was performed using the Quantum Theory of Atoms In Molecules (QTAIM) theory and Non-Covalent Interactions (NCI) index. The obtained results were summarized as the generalized, empirical model of the composite substituent effect, assessed using an additional group of simple ring-based Schiff bases. The composite substituent effect has been divided into separate increments describing the different interactions of the hydrogen bridge and the substituent: the classical substituent effect, involving resonance and induction mediated through the ring, steric increment based on substituent proximity to the bridge elements, and distal increment, derived from substitution on the distal ring.

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“…Besides, the synthesis of Schiff bases has been increasing attention in synthetic organic chemistry, because of their potential applications in biological modeling, catalysis, design of molecular magnets and materials chemistry (22)(23)(24) and also widely used as chelating agents (25)(26)(27), as corrosion inhibitors (28)(29), as an herbicide (30), as textile dyes (31), as stabilizers in polymer chemistry (32).…”

Section: Introductionmentioning

confidence: 99%

Dyeing Polyester, Cotton and Wool with Some Schiff Bases Derived from 4-chloroaminophenol and Various Benzaldehydes

Gürbüz

2020

Journal of the Turkish Chemical Society Section A: Chemistry

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Dyeability of ten Schiff bases obtained from 4-chloroaminophenol and various benzaldehydes including methyl, chloro, bromo, nitro, methoxy, and hydroxy groups were investigated on polyester, cotton and wool fibers. The dry/wet rubbing and washing fastness of the compounds were measured. It is observed that the rubbing and washing fastness values are varying at the 4 -5 range (1: weak, 5: excellent). The lightness (L), red-greenness (a), and yellow-blueness (b) properties of the compounds were also investigated. It was observed that the dyeing properties of the compounds change depending on the substituent positions, and the substituent effect is observed on wool mostly. Especially, 3-and 5-methyl derivatives (VIII and IX) exhibit similar behavior toward polyester and cotton while they behave differently on wool in point of the L, a, and b values. On the other hand, it can be claimed that chlorine substituent increases the L value on wool.

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Synthesis and characterization of various Schiff bases for non-linear optical applications

Cited by 48 publications

References 7 publications

Synthesis and Mass Spectrum Characterization of Lyrame Schiff Base for Synthetic Ingredients in Perfumes Industry

Synthesis and Mass Spectrum Characterization of Lyrame Schiff Base for Synthetic Ingredients in Perfumes Industry

Comprehensive Empirical Model of Substitution—Influence on Hydrogen Bonding in Aromatic Schiff Bases

Dyeing Polyester, Cotton and Wool with Some Schiff Bases Derived from 4-chloroaminophenol and Various Benzaldehydes

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