Experimental and theoretical investigation of the spectral and luminescent properties of some acridine compounds

Synthesis and characterization of ferrocenyl-acridine dyads and their multiresponse to proton and metal cations

“…The integrated emission intensity of the protonal species is enormously increases. Similar results are also reported for related acridine compounds [25,26]. The emission spectra of 3b also show enhanced fluorescence effect after protonation.…”

“…This demonstrates that the HBF 4 initiated spectra changes are due to reversible acid-base equilibria. The band centered at 458 nm can be attributed to protonation the acridine moiety, which is similar to the spectra of some reported protonation acridines [24][25][26]. While band centered at 665 nm assigned to MLCT transition.…”

“…Owing to the presence of a nitrogen atom in the rings, these compounds are weak organic bases capable of adding a proton in acidic media, or coordinating with metal ions. Their electronic spectra may change accordingly [23][24][25][26]. Finally, previous studies indicate that the presence of hetero-aromatics in conjugated Fc-donor organic-acceptor dyads is highly beneficial for the observation of large NLO properties [14].…”

Increased expression of CD40 on bone marrow CD34+ hematopoietic progenitor cells in patients with systemic lupus erythematosus: Contribution to Fas‐mediated apoptosis

“…9‐(Diphenylamino)acridine (DPAA), see Figure 1a, the dye considered in this paper, and its substituted analogue, 2,7‐dimethyl‐9‐(ditolylamino)acridine (DTAA), bearing four additional methyl substituents, were synthesized at the Photochemistry Center of the Russian Academy of Sciences and studied as fluorescent indicator dyes for optical chemical sensors 5. Their electronic absorption and emission spectra in the gas phase were studied by semiempirical (ZINDO‐S)6 and DFT (B3LYP, PBE0)7, 8 quantum‐chemical calculations; solvatochromic Stockes shifts in the electronic absorption/emission spectra of DPAA and DTAA in benzene and acetonitrile solutions were studied using the TDDFT (B3LYP) formalism combined with the RHF/6‐31G( d,p )/PCM and CIS/6‐31G( d,p )/PCM calculations for treating solvent effects 9…”

Host–guest composite materials of dyes loaded zeolite LTL for antenna applications

“…The second type, when Ac is dissolved in methanol, is a hydrogenbonded specie showing the emission maximum at 412 nm. Other reports demonstrated that in methanol hydrogen-bonded species showing the emission band at 414 nm [29,30]. The last type with the emission maximum around 465 nm is assigned to be a protonated specie [27,31].…”