Twisted configuration pyrene derivative: exhibiting pure blue monomer photoluminescence and electrogenerated chemiluminescence emissions in non-aqueous media

Abstract

A blue light emitting pyrene derivative, 1-methyl benzoate-pyrene (MB-Py), was synthesized by employing a pyrene moiety as the parent linked with a small electron-donating group, methyl benzoate. Owing to the introduction of methyl benzoate, there is an evident twisted configuration between the methyl benzoate moiety and the central pyrene core with a dihedral angle of 56 , confirmed by density functional theory

Functionalization of Carbon Nanotubes with Nickel Cyclam for the Electrochemical Reduction of CO2

“…are present in solution and that the ligand itself is redox-active due to the presence of pyrene. [18] The first feature at -2.28 V was assigned to the one-electron reduction of Ni II to Ni I , approximately 180 mV more cathodic than for the unfunctionalized [Ni(cyclam)] 2+ complex peaking at -2.1 V (Figure 2, red), in agreement with a much more electron-enriched Ni center in complex 1 due to the presence of extra electron-donating ligands. As a confirmation of this assignment to the metal site, this feature was absent on the CV of the unmetallated pyren-cyclam ligand, L (Figure 2, blue).…”

Functionalization of Carbon Nanotubes with Nickel Cyclam for the Electrochemical Reduction of CO2

“…The electrochemical properties of complex 1 were studied in DMF, with all potentials vs. Fc + /Fc 0 . Figure 2 (dotted, dashed and black) shows the complex cyclic voltammograms (CVs) of complex 1 (1 mM) with 0.1 M TBAPF 6 in DMF as supporting electrolyte on a glassy carbon disk (3 mm diameter) as a working electrode, under an argon atmosphere, when scanned down to either −2.38, −2.62 or −3.1 V. The complexity comes from the fact that two different complexes, trans‐ 1 and cis‐ 1 , are present in solution and that the ligand itself is redox‐active due to the presence of pyrene [18] . The first feature at −2.28 V was assigned to the one‐electron reduction of Ni II to Ni I , approximately 180 mV more cathodic than for the unfunctionalized [Ni(cyclam)] 2+ complex peaking at −2.1 V (Figure 2, red), in agreement with a much more electron‐enriched Ni center in complex 1 due to the presence of extra electron‐donating ligands.…”

Unveiling Adsorption of Boron Dipyrromethene Conjugated PbS Nanocrystals on Pt Electrode Surface: An Approach Using Electrogenerated Chemiluminescence Spooling Spectra and Multivariate Analysis

“…Electrogenerated chemiluminescence or electrochemiluminescence (ECL) is a redox induced emission where the excited state is generated after electrochemical stimulus. , As a combination of electrochemical and spectroscopic methods, ECL possesses several advantages over photoluminescence such as very low background and no scattering of the emitted light due to the absence of an excitation light source. , As a result, ECL has become a powerful analytical technique which has widely been studied and used in many fields including immunochemistry, , mobile devices, tumor markers, early detection, and very recently imaging . In the quest for ever-increasing sensitivity, ECL has been coupled with nanotechnology to optimize the electron transfer that induces the excited state formation. − In this context, dye-doped silica nanoparticles, inorganic quantum dots, , carbon dots, and polymer dots − play crucial roles benefited by high ECL emission and stability.…”