The role of π-linkers and electron acceptors in tuning the nonlinear optical properties of BODIPY-based zwitterionic molecules

Abstract

BODIPY-based zwitterionic molecules with pyridinium and imidazolium electron acceptors and thienothiophene π-linkers reveal significant first hyperpolarizability.

Theoretical Study on the Nonlinear Optical Property of Boron Nitride Nanoclusters Functionalized by Electron Donating and Electron Accepting Groups

“…Thereby the design and synthesis of novel nonlinear optical materials have achieved much attention due to their widespread applications associated with optoelectronics, − photonics , such as optical signals, data storage, optical computing, optical sensing, telecommunications, and other devices. Scientists have constantly proposed different strategies for enhancing nonlinear optical (NLO) properties of molecules; among these, compounds having donor–acceptor groups either directly or indirectly connected via π-conjugated linkers are one of the popular options. − In donor−π–acceptor framework NLO response emerges from an optically intense charge transfer state where electron density is transmitted from the electron donor to the electron acceptor moiety. This design improves polarization abilities and diminishes the optical gaps of NLO compounds.…”

Effects of External Field Wavelength and Solvation on the Photophysical Property and Optical Nonlinearity of 1,3-Thiazolium-5-Thiolates Mesoionic Compound

“…Generally speaking, the photophysical and nonlinear optical (NLO) properties of these chromophores can be controlled by adjusting their structural modules: electron donor, π-conjugated linker, or electron acceptor. [20][21][22][23][24] Since Baker and coworkers put forward the concept of "mesoionic" in 1949, 25,26 mesoionic rings defined by planar five-or six-membered heterocyclic betaines with at least one side-chain whose -atom in the ring plane have been recognized as a promising candidate for conjugated bridges of optical materials because of their electronic mobility. 27 Numerous mesoionic compounds with different electron donors and electron acceptors have been studied both theoretically and experimentally.…”

Ternary Chalcogenide-Based Quantum Dots and Carbon Nanotubes: Establishing a Toolbox for Controlled Formation of Nanocomposites

“…This can be attributed to the partial destruction of the conjugated π-electron system when oxidizing the scaffold of the nanotubes to introduce −OH, −CHO, and −COOH groups, and by destroying this delocalized electron system, the ability to act as a charge acceptor gets additionally weakened. 68 Furthermore, the influence of the shell thickness on quenching rates and charge transfer between semiconductor nanoparticles and carbon nanotubes was investigated. Figure 11 shows the emission spectra of 3 + 2 ML ( Figure 11 a,b) and 7 + 2 ML ( Figure 11 c,d) thick core/shell quantum dots that are attached to MWCNTs presented.…”

“…Figure c shows the corresponding Stern–Volmer plots showing that an increase in oxidation time leads to reduced photoluminescence quenching. This can be attributed to the partial destruction of the conjugated π-electron system when oxidizing the scaffold of the nanotubes to introduce −OH, −CHO, and −COOH groups, and by destroying this delocalized electron system, the ability to act as a charge acceptor gets additionally weakened . Furthermore, the influence of the shell thickness on quenching rates and charge transfer between semiconductor nanoparticles and carbon nanotubes was investigated.…”