Solid-State Highly Efficient DR Mono and Poly-Dicyano-Phenylenevinylene Fluorophores

Abstract

A highly efficient deep red (DR) emitting organic solid based on a dicyano-phenylenevinylene derivative was reported. The structural and spectroscopic properties of the solid have been described in terms of crystallographic data and time dependent DFT analysis. A noteworthy fluorescence quantum yield of 53% was observed for the brightest emitter cast into solid films. This result can be explained in terms of aggregation-induced emission (AIE) effect.

A μ4‐Oxo Bridged Tetranuclear Zinc Complex as an Efficient Multitask Catalyst for CO2 Conversion

“…Each metal center form stable five membered ring around itself through coordination with angles varies from 80.45(11)° to 116.1(3)°. The C−C and C−N bond lengths are comparable to similar benzothiazole based Schiff base ligands reported in the literature [28,31] . In the molecular structure, the μ 4 ‐oxygen occupied a special position in the structure holding all the four zinc metals.…”

Abnormally aggregation-induced emissions observed from hydrogen- and silyl-substituted siloles

“…The above data show that hydrogen atom in TPSHC exhibits a minimum atomic radius and a little electronegativity in hydrogen-silicon bond, which can lead to TPSHC a strong emission because of restricting molecular motions and stabilizing a twisted conformation (Panunzi et al, 2018). On the other hand, hydrogen-silicon bond can increase the σ*-π* conjugation of TPSHC, which can lower the energy gap, and contribute to increase the electronic transmissions.…”