119643-02-6

Upstream product

• 90-02-8 salicylaldehyde 
• 106-50-3 1,4-phenylenediamine 
• 89-95-2 2-methyl-benzyl alcohol 

Downstream Products

• 34579-88-9 2,2'-(1,4-phenylene-bis(azanediyl)-bis(methylene))diphenol 

Relevant academic research and scientific papers

Li+-Induced fluorescent metallogel: A case of ESIPT-CHEF and ICT phenomenon

A fluorescent metallogel (1percent w/v) has been synthesized from non-fluorescent ingredients viz. the smallest possible low molecular weight aromatic symmetrical ligand H2SA (1) and LiOH in a chloroform and methanol mixture. The chelation of Li+ is not only responsible for the inhibition of excited state intramolecular proton transfer (ESIPT) or the origin of fluorescence through chelation enhanced fluorescence (CHEF) in 1, but also for aggregation leading to gelation. The metallogel obtained from 1/Li+ reveals a fibrous morphology while 1 with other, bigger size, alkali metal ions like Na+/K+/Cs+ demonstrates the growth of crystals with different shapes. The effect of the size of the alkali metal ion over gel formation is well explored by FTIR, UV-vis, fluorescence, average lifetime measurements, SEM and PXRD. The metallogel shows multi-stimuli responsive behaviour towards thermal and mechanical stress as well as reswelling properties. The regioisomer H2PBA (2) also shows emission upon treatment with LiOH due to the presence of intramolecular charge transfer (ICT), this is well established by various experiments. The mechanism of gel formation is well established by FTIR, 1H NMR, UV-vis, fluorescence, lifetime measurements, SEM and single crystal and powder XRD instrumental techniques. The involvement of various phenomena in gel formation has been further supported by other synthesized model compounds viz. H2MBA (3), PMO (4), H2SEA (5) and H2SPA (6). True gel phase material is proved by detailed rheological experiments.

Salicylaldimine-bridged dinuclear cyclopalladated complexes: Synthesis, characterization and BSA binding studies

Salicylaldimine-bridged dinuclear cyclopalladated complexes were synthesized by the reactions of cyclopalladated chloro dimers [Pd{(4-R)C6H3CH=N-C6H3–2,6-i-Pr2}(μ-Cl)]2 (R = H; OMe) with sa

Structure and Optical Properties of a Thermochromic Schiff Base. Thermally Induced Intramolecular Proton Transfer in the N,N'-Bis(salicylidene)-p-phenylenediamine Crystals

A thermochromic derivative of salicylideneaniline, N,N'-bis(salicylidene)-p-phenylenediamine (BSP), has been prepared and subjected to structural and optical studies in the crystalline state.An X-ray crystallographic analysis has shown that the molecules

Stannous chloride catalyzed synthesis of Schiff bases from hydroxybenzaldehydes and determination of their antioxidant activity by ABTS and DPPH assay

Abstract: Phenolic compounds play a very important role in human life because of their antioxidant activity which can prevent harmful diseases caused by free radicals. In the present work, we have synthesized some Schiff bases by the reaction of different

Tunable Color of Aggregation-Induced Emission Enhancement in a Family of Hydrogen-Bonded Azines and Schiff Bases

A simple synthesis strategy afforded a family of hydrogen-bonded azines and Schiff-bases. Although in dilute solution these dyes are faint light emitters, all exhibit bright luminescence upon aggregation. Changing the peripheral substituents from electron donating to electron withdrawing allows emission fine-tuning in a range from bluish-green to orange-red. The crystal structures of the materials reveal that the restriction of intramolecular rotations is the main mechanism for the aggregation-induced emission enhancement properties.

Multi-color cell imaging under identical excitation conditions with salicylideneaniline analogue-based fluorescent nanoparticles

Six salicylideneaniline (SA) derivatives are synthesized through a condensation reaction. Benefiting from their coplanar molecular conformation and intramolecular hydrogen bonds, three of the compounds are found to exhibit aggregation-induced emission (AI

Synthesis, characterization and biological activity of some platinum(II) complexes with Schiff bases derived from salicylaldehyde, 2-furaldehyde and phenylenediamine

Four platinum(II) complexes of Schiff bases derived from salicylaldehyde and 2-furaldehyde with o- and p-phenylenediamine were reported and characterized based on their elemental analyses, IR and UV-vis spectroscopy and thermal analyses (TGA). The complex

N,N′-bisbenzylidenebenzene-1,4-diamines and N,N′- bisbenzylidenenaphthalene-1,4-diamines as sirtuin type 2 (SIRT2) inhibitors

A series of N,N′-bisbenzylidenebenzene-1,4-diamine and N,N′-bisbenzylidenenaphthalene-1,4-diamine derivatives were synthesized as inhibitors for human sirtuin type 2 (SIRT2). The design of the new compounds was based on two earlier reported hits from molecular modeling and virtual screening. The most potent compound was N,N′-bis(2-hydroxybenzylidene) benzene-1,4-diamine, which was equipotent with the most potent hit compound and well-known SIRT2 inhibitor sirtinol.

Effect of the tether on the Mg(II), Ca(II), Cu(II) and Fe(III) stability constants and pM values of chelating agents related to EDDHA

The effect of the length and the structure of the tether on the chelating ability of EDDHA-like chelates have not been established. In this work, PDDHA (propylenediamine-N,N′-bis(o-hydroxyphenyl)acetic acid), BDDHA (butylenediamine-N,N′-bis(o-hydroxypheny

Infrared spectral studies on the stability of some binuclear transition metal-Schiff base complexes

Some di-Schiff bases like N,N'-o-phenylene-bis-salicylaldimine (DSB1), N,N'-m-phenylene-bis-salicylaldimine (DSB2) and N,N'-p-phenylene-bis-salicylaldimine (DSB3) have been synthesized by the condensation of salicylaldehyde with o-, m- and p-phenylenediam