Investigating the structure- fluorescence properties of tetraphenylethylene fused imidazole AIEgens: reversible mechanofluorochromism and polymer matrix controlled fluorescence tuning

Show simple item record

dc.contributor.author Nagarasu, Palaniyappan
dc.contributor.author Kundu, Anu
dc.contributor.author Thiruvenkatam, Vijay
dc.contributor.author Raghavaiah, Pallepogu
dc.contributor.author Anthony, Savarimuthu Philip
dc.contributor.author Madhu, Vedichi
dc.coverage.spatial United Kingdom
dc.date.accessioned 2012-09-26T07:22:31Z
dc.date.available 2012-09-26T07:22:31Z
dc.date.issued 2021-06
dc.identifier.citation Nagarasu, Palaniyappan; Kundu, Anu; Thiruvenkatam, Vijay; Raghavaiah, Pallepogu; Anthony, Savarimuthu Philip; Madhu, Vedichi, “Investigating the structure–fluorescence properties of tetraphenylethylene fused imidazole AIEgens: reversible mechanofluorochromism and polymer matrix controlled fluorescence tuning”, CrystEngComm, DOI: 10.1039/D1CE00561H, vol. 23, no. 31, pp. 5403-5410, Jun. 2021. en_US
dc.identifier.issn 1466-8033
dc.identifier.uri https://doi.org/10.1039/D1CE00561H
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/6648
dc.description.abstract A series of stimuli-responsive AIEgens of tetraphenylethylene (TPE) fused imidazole derivatives (1-7) were synthesized, and their substituent controlled fluorescence properties in the solid state were explored. The structure of the synthesised compounds was characterized by NMR, mass and single crystal X-ray diffraction spectroscopy techniques. 1-7 exhibited a typical aggregation induced emissive (AIE) behaviour in the THF?:?water mixture. These compounds exhibited substituent dependent strong solid state fluorescence (?f = 16.6-55.7%) with a tunable ?max between 458 and 496 nm. Chlorine substituted 6 showed the highest fluorescence efficiency (?f = 55.7%), whereas acetyl substituted 3 exhibited the lowest fluorescence efficiency (?f = 16.6%). All the seven compounds showed a mechanical pressure induced reversible fluorescence switching. Crushing 1-7 resulted in red shifted fluorescence, which was reversed to its initial state by heating/solvent vapour exposure. Interestingly, integration of 1-7 into a hydrophobic PMMA polymer resulted in blue shifted fluorescence at 470 nm, whereas that into hydrophilic PVA polymer resulted in red shifted fluorescence at 491 nm. Thus highly solid state emissive TPE fused imidazole compounds were prepared, and their stimuli-induced reversible fluorescence switching and polymer controlled tunable fluorescence were demonstrated.
dc.description.statementofresponsibility by Palaniyappan Nagarasu, Anu Kundu, Vijay Thiruvenkatam, Pallepogu Raghavaiah, Savarimuthu Philip Anthony and Vedichi Madhu
dc.format.extent vol. 23, no. 31, pp. 5403-5410
dc.language.iso en_US en_US
dc.publisher Royal Society of Chemistry en_US
dc.title Investigating the structure- fluorescence properties of tetraphenylethylene fused imidazole AIEgens: reversible mechanofluorochromism and polymer matrix controlled fluorescence tuning en_US
dc.type Article en_US
dc.relation.journal CrystEngComm


Files in this item

Files Size Format View

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record

Search Digital Repository


Browse

My Account