Propriedades fotofísicas de derivados de imidazo[1,2->i<a>/i<]piridina DOI Creative Commons

João Victor Pereira Valverde

Published: July 13, 2023

Currently, there is great interest in organic molecules with π-conjugated systems due to significant advances molecular engineering, which have enabled the modulation of optical properties compounds for specific purposes.The nonlinear optics field has benefited from these advances, particularly context two-photon absorption (2PA) processes compounds.This important implications applications such as 2PA fluorescence microscopy and photodynamic therapy, among others.A materials class that attracted considerable attention derived imidazo[1,2-a]pyridine (IP), its similarity purine good emissive properties, making it highly interesting involving fluorescent markers various molecules, especially DNA RNA.However, knowledge photophysical IP still limited, only a few spectroscopic studies available on this molecule.In order expand potential derivatives, necessary conduct systematic address their linear characteristics.In dissertation, we present detailed study seven new derivatives dissolved dimethyl sulfoxide (DMSO).The studied here contain different peripheral groups, some are structures strong electron-donating or electron-withdrawing character, while others enhance effective conjugation.These groups can modify typical molecule act amplify modulate properties.The objective work understand influence relation 2PA.For purpose, techniques were employed elucidate fundamental aspects compounds.The Z-scan technique was used determine spectrally resolved cross-section all samples.In addition, quantum chemical calculations performed using density functional theory, including timedependent calculations, contribute interpretation experimental data.By employing techniques, observed increase conjugation, provided by naphthalene substituent, results an approximately 7-fold 2PA.This behavior also when character added core imidazo[1,2-a]pyridine.These suggest responses ( 2 ≈ 20 ) be achieved less conjugated structures, possess electronwithdrawing appropriately positioned.Thus, understanding obtained.It expected investigation materials, imidazo[1,2-a]pyridine, aiming applications.

Language: Английский

Photophysical properties of 3-arylthioimidazo[1,2-a]pyridine derivatives: The role of peripheral electron-donating and electron-withdrawing groups in the advance of organic materials engineering DOI Creative Commons
Leandro H. Zucolotto Cocca, João V.P. Valverde,

Julie Le Bescont

et al.

Journal of Molecular Structure, Journal Year: 2023, Volume and Issue: 1300, P. 137221 - 137221

Published: Dec. 2, 2023

Language: Английский

Citations

4
Tuning the linear optical properties and two-photon absorption on the cinnamylideneacetophenone derivatives: The effect of methoxy group by a experimental and theoretical point of view DOI
Carlos H. D. dos Santos, André G. Pelosi, João V.P. Valverde

et al.

Journal of Photochemistry and Photobiology A Chemistry, Journal Year: 2024, Volume and Issue: 453, P. 115648 - 115648

Published: March 29, 2024

Language: Английский

Citations

1
Exploring the two-photon absorption response in short π-chain organic compounds: Hydrazones and pyrazolines derivatives DOI
Raiane Sodré de Araújo, Luis M. G. Abegão, Leandro H. Zucolotto Cocca

et al.

Optical Materials, Journal Year: 2024, Volume and Issue: 152, P. 115448 - 115448

Published: May 1, 2024

Language: Английский

Citations

0
Studying the influence of electron donor-withdraw groups on the photophysical properties of 3-arylthioimidazo[1,2- a ]pyridines: experimental and theoretical study DOI
Carlos H. D. dos Santos, Daniel L. Silva,

Julie Le Bescont

et al.

Molecular Physics, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 7, 2024

Imidazo[1,2-a]pyridine derivatives have received great attention in recent years various fields such as pharmaceuticals and material sciences, to a lesser extent, thanks the flexibility incorporate different peripheral groups. With advance chemical synthesis routes, large number of substituted imidazo[1,2-a]pyridines been developed but are still be investigated new optical materials. Therefore, we performed spectroscopy study for set nine 3-arylthioimidazo[1,2-a]pyridine with groups reveal their structure-optical property relationships gain deeper understanding influence nature substitution. The photophysical measurements include linear absorption, fluorescence emission, quantum yield, lifetime, anisotropy solvatochromism. results showed that these properties can modulated by changing position and/or For example, yield values increase c.a. ten-fold, which is vital fluorescent applications, permanent dipole moment difference at first excited state (Δμ01) increased five-fold. Moreover, performance calculations using Density Functional Theory polarisable continuum solvation model allowed us understand electronic transitions charge transfer investigated.

Language: Английский

Citations

0
Propriedades fotofísicas de derivados de imidazo[1,2->i<a>/i<]piridina DOI Creative Commons

João Victor Pereira Valverde

Published: July 13, 2023

Currently, there is great interest in organic molecules with π-conjugated systems due to significant advances molecular engineering, which have enabled the modulation of optical properties compounds for specific purposes.The nonlinear optics field has benefited from these advances, particularly context two-photon absorption (2PA) processes compounds.This important implications applications such as 2PA fluorescence microscopy and photodynamic therapy, among others.A materials class that attracted considerable attention derived imidazo[1,2-a]pyridine (IP), its similarity purine good emissive properties, making it highly interesting involving fluorescent markers various molecules, especially DNA RNA.However, knowledge photophysical IP still limited, only a few spectroscopic studies available on this molecule.In order expand potential derivatives, necessary conduct systematic address their linear characteristics.In dissertation, we present detailed study seven new derivatives dissolved dimethyl sulfoxide (DMSO).The studied here contain different peripheral groups, some are structures strong electron-donating or electron-withdrawing character, while others enhance effective conjugation.These groups can modify typical molecule act amplify modulate properties.The objective work understand influence relation 2PA.For purpose, techniques were employed elucidate fundamental aspects compounds.The Z-scan technique was used determine spectrally resolved cross-section all samples.In addition, quantum chemical calculations performed using density functional theory, including timedependent calculations, contribute interpretation experimental data.By employing techniques, observed increase conjugation, provided by naphthalene substituent, results an approximately 7-fold 2PA.This behavior also when character added core imidazo[1,2-a]pyridine.These suggest responses ( 2 ≈ 20 ) be achieved less conjugated structures, possess electronwithdrawing appropriately positioned.Thus, understanding obtained.It expected investigation materials, imidazo[1,2-a]pyridine, aiming applications.

Language: Английский

Citations

0