A Novel Fluorescent Probe for Determination of pH and Viscosity Based on a Highly Water-Soluble 1,8-Naphthalimide Rotor

Simple item page
creativework.keywords1,8-naphthalimide, fluorescence, pH, twisted intramolecular charge transfer (TICT), viscosity
creativework.publisherMDPIen
dc.contributor.authorBakov V.V.
dc.contributor.authorGeorgiev N.I.
dc.contributor.authorBojinov V.B.
dc.date.accessioned2024-07-10T14:27:05Z
dc.date.accessioned2024-07-10T14:50:31Z
dc.date.available2024-07-10T14:27:05Z
dc.date.available2024-07-10T14:50:31Z
dc.date.issued2022-11-01
dc.description.abstractA novel highly water-soluble 1,8-naphthalimide with pH and viscosity-sensing fluorescence was synthesized and investigated. The synthesized compound was designed as a molecular device in which a molecular rotor and molecular “off-on” switcher were integrated. In order to obtain a TICT driven molecular motion at C-4 position of the 1,8-naphthalimide fluorophore, a 4-methylpiperazinyl fragment was introduced. The molecular motion was confirmed after photophysical investigation in solvents with different viscosity; furthermore, the fluorescence-sensing properties of the examined compound were investigated in 100% aqueous medium and it was found that it could be used as an efficient fluorescent probe for pH. Due to the non-emissive deexcitation nature of the TICT fluorophore, the novel system showed low yellow–green emission, which represented “power-on”/“rotor-on” state. The protonation of the methylpiperazine amine destabilized the TICT process, which was accompanied by fluorescence enhancement indicating a “power-on”/“rotor-off” state of the system. The results obtained clearly illustrated the great potential of the synthesized compound to serve as pH- and viscosity-sensing material in aqueous solution.
dc.identifier.doi10.3390/molecules27217556
dc.identifier.issn1420-3049
dc.identifier.scopusSCOPUS_ID:85141614937en
dc.identifier.urihttps://rlib.uctm.edu/handle/123456789/754
dc.language.isoen
dc.source.urihttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85141614937&origin=inward
dc.titleA Novel Fluorescent Probe for Determination of pH and Viscosity Based on a Highly Water-Soluble 1,8-Naphthalimide Rotor
dc.typeArticle
oaire.citation.issue21
oaire.citation.volume27
Files
Collections
Articles