Green light-emitting 2-(1H-indol-3-yl)acetonitrile-based D–A fluorophores – a combined theoretical and experimental study

Muruganantham, Subramanian; Nagarajan, N.; Velmurugan, Gunasekaran; Prakash, Amit; Katiyar, Monica; Venuvanalingam, Ponnambalam; Renganathan, R.

doi:10.1039/c6qm00326e

Cited by 13 publications

(4 citation statements)

References 54 publications

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“…Lifetime values reveal the molecules MBF and MBE to possess a three‐component lifetime corresponds to the de‐excitation of the system from three different excited states. System adopting various conformations at their excited state results in a multicomponent lifetime with different spin multiplicities . MBE amongst the series exhibited a larger lifetime value of 5.18 ns, while MBB showed a two‐component lifetime resulting in a value of 1.55 ns and 0.61 ns respectively.…”

Section: Resultsmentioning

confidence: 99%

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Design, Synthesis and Characterization of N‐Substituted Heteroaromatics: DFT‐Studies and Organic Light Emitting Device Application

et al. 2020

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Schiff's base condensation of 4,5-Dimethyl-1,2-phenylenediamine with various aldehydes namely fluorene-2-carboxaldehyde (MBF), N-ethyl-3-carboxaldehyde (MBE), 8-hydroxyjulolidine-9-carboxaldehyde (MBJ) and N-(4-formylphenyl) carbazole (MBB) functioning as light emitters have been synthesized. Solid-state emission reveals the exhibition of variant fluorescent color achieved by mere variation in the peripheral group attached to the core. Amongst the designed system, MBB showed a solid-state blue light emission with its emission peak centered at 453 nm. The fluorescence quantum yield of MBB displayed value of 44.82% in the solution state. Electrochemical studies on MBB estimated a HOMO energy level at À 5.7 eV and LUMO at À 3.2 eV. OLED realized with MBB as an active emitter material was successful in the generation of bluish-green emission with a maximum brightness of 280 cd/m 2 . Current efficiency of 2 cd/A and a power efficiency of 0.18 lm/W was observed for the fabricated device.[a] M. Mohan, S. M. Nagarajan

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Section: Resultsmentioning

confidence: 99%

“…System adopting various conformations at their excited state results in a multicomponent lifetime with different spin multiplicities. [53] MBE amongst the series exhibited a larger lifetime value of 5.18 ns, while MBB showed a two-component lifetime resulting in a value of 1.55 ns and 0.61 ns respectively.…”

Section: Fluorescence Lifetime Determinationmentioning

confidence: 90%

Design, Synthesis and Characterization of N‐Substituted Heteroaromatics: DFT‐Studies and Organic Light Emitting Device Application

et al. 2020

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“…The multicomponent lifetime exists due to the presence of different conformations in the excited state with different spin multiplicities. For D 7 and D 8, owing to the presence of three lifetime components, their emission is from three excited states …”

Section: Resultsmentioning

confidence: 99%

“…Depending on the type of additional aromatic groups attached, thiophene derivatives are known to exhibit either electron transporting, hole transporting, or bipolar characteristics . Owing to the synthetic flexibility and the strong polarizability of the sulfur atoms giving rise to strong S–S and S—π intermolecular interactions for contributing high charge mobility,, thiophene based materials have been the focus of research. Researchers have extensively studied the AIE effect of various organic molecules and validated by photophysical, electrochemical and DFT studies .…”

Section: Introductionmentioning

confidence: 99%

Multicoloured Thiophene Based AIEgens: Single Crystal Structure Elucidation, Spectral Behaviour and DFT Studies

et al. 2018

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A series of Schiff base thiophene derivatives, D1 to D9, which exhibits a phenomenon of aggregation‐induced emission enhancement (AIEE) have been synthesised and characterized by standard spectroscopic techniques. Multicoloured emission enhancement has been achieved just by introduction of electron donating and withdrawing substituent on the thiophene moiety. Few of the molecules in the series exhibited enhanced fluorescence emission intensity in solvent mixture in comparison with that observed in pure solvent supportive of AIE. Single crystal x‐ray diffraction (SCXRD) studies on selected molecules, D6 and D7 of the series revealed the existence of planar structure and a herringbone type of crystal packing arrangement. In specific, molecules D6 and D7, possesses a larger π‐π stacking distance of around 4.866 Å and 4.636 Å, which curbs all the non‐radiative pathways, in turn leading to AIEE. DFT and TDDFT calculations confirm the structural planarity supportive of SCXRD analysis and the nature of electronic transition correlating well with the experimental results.

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Aggregation-induced emission in thiophene derivatives

Satyanarayan

Trivedi

Mohan

et al. 2022

ISSS J Micro Smart Syst

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Green light-emitting 2-(1H-indol-3-yl)acetonitrile-based D–A fluorophores – a combined theoretical and experimental study

Abstract: A series of new fluorophores based on 2-(1H-indol-3-yl)acetonitrile incorporated with various polycyclic aromatic hydrocarbons, carbazole, pyridine, triphenylamine was synthesised and their optical, thermal, electrochemical properties were evaluated.

Cited by 13 publications

References 54 publications

Design, Synthesis and Characterization of N‐Substituted Heteroaromatics: DFT‐Studies and Organic Light Emitting Device Application

Design, Synthesis and Characterization of N‐Substituted Heteroaromatics: DFT‐Studies and Organic Light Emitting Device Application

Multicoloured Thiophene Based AIEgens: Single Crystal Structure Elucidation, Spectral Behaviour and DFT Studies

Aggregation-induced emission in thiophene derivatives

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