20361-56-2

Upstream product

• 1606-67-3 1-aminopyrene 
• 90-02-8 salicylaldehyde 

Relevant academic research and scientific papers

Synthesis and characterization of a pyrene-based Schiff base and its oligomer: Investigation of fluorescent Cr3+ probe

In this study, a unique Schiff base (SP) was synthesized from 1-aminopyrine (1-AP) and salicylaldehyde (SA) compounds. The obtained oligomer of this Schiff base was carried out by the oxidative polymerization method. The structural characterizations of 2-((pyren-1-yl-imino)methyl)phenol (SP) and oligo-2-((pyren-1-yl-imino)methyl)phenol (OSP) by FT-IR, 1H NMR and 13C NMR measurements, electrochemical properties by cyclic voltammetry (CV); optical properties by UV/Vis studies and photoluminescence (PL) spectrophotometry; thermal stability were performed by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The molecular weight of the obtained oligomer was determined using gel permeation chromatography (GPC). Accordingly, Mn and Mw values of OSP were found to be 2800 and 3150 Da, respectively. The imine bond provided the structures with high thermal stability, and the maximum mass loss temperatures (Tmax) of SP and OSP were found to be 350 0 and 343 °C, respectively. PL study showed that SP could be used as a Cr3+ sensor among a series of metals. The results revealed that the limit of detection (LOD) value of SP was 1.03 × 10?9 M and was not affected by other ions in the environment.

Solid-state photochromism and thermochromism of N-salicylidene pyrene derivatives

N-Salicylidene pyrene derivatives of the common formula 1-pyrene-NCH-(2-OH-aryl) [aryl = C6H4 (1), 5-Cl-C 6H3 (2), 5-Br-C6H3 (3), 5-NO 2-C6H3 (4), 3,5-Cl2-C 6H2 (5), 3,5-Br2-C6H2 (6), and 3-CH3O-C6H3 (7)] have been synthesized and characterized by elemental analysis, NMR, diffuse reflectance and fluorescence spectroscopy. The crystal structures of 2, 3 and 5-7 are stabilized by an intramolecular hydrogen bond and a broad network of intermolecular π...π stacking interactions. All molecules, except 1, show the presence of a mixture of enol and cis- and trans-keto forms in the solid state at room temperature. Compounds 1 and 7 are exclusively thermochromic, while 5 displays negative trans-keto to cis-keto photochromism upon irradiation at λ = 546 nm, which is photoreversible upon irradiation at λ = 450 nm. The photogenerated cis-keto form of 5 is highly stable under ambient conditions and shows very negligible and slow thermal relaxation. This journal is the Partner Organisations 2014.

Fluorescence turn-on sensors for HSO4-

A coumarin-based derivative (1), a highly selective and sensitive turn-on fluorogenic probe for the detection of HSO4- ions in aqueous solution, has been designed and synthesized. Various spectroscopic and DFT calculations revealed t