The synthesis of N-derivatives of 3-aminoperylene and their absorption and fluorescence properties

Spiro Rhodamine-Perylene Compact Electron Donor–Acceptor Dyads: Conformation Restriction, Charge Separation, and Spin–Orbit Charge Transfer Intersystem Crossing

“…Thus, we suppose that the structured absorption band of the dyads, especially in Rho - Pery - 3 , is not solely due to the electron deficiency of the amide N atom of the amide structure, instead, the twisted amide moiety against perylene may reduce the π-conjugation between the N atom and perylene. , The support for this postulation is that Ac-3-APery shows an absorption band similar to that of Rho-Pery-3 but less structured (Figure S21). The absorption bands of Ac-1-APery and Ac-3-APery are centered at 432 and 440 nm, respectively, which are less structured as compared to those of the dyads (Figure S21).…”

“…1-APery, 50 3-APery, and Ac-3-APery were prepared according to the literature methods. 51 2.2. Synthesis of Rho-Pery-1.…”

“…Luminescence lifetimes of compounds were recorded with an OB920 luminescence lifetime spectrometer (Edinburgh Instruments Ltd., U.K.). 1 - APery , 3 - APery , and Ac-3 - APery were prepared according to the literature methods …”

The synthesis of bi- and trichromophoric dyes bearing an s-triazinyl ring spacer

“…2); the fluorescence of this compound is reduced in DO (dielectric constant 2.22) this solvent behaves like a more polar solvent even though its dielectric constant is small [3,6]. The Table 1 Absorption (A max , nm) and fluorescence (F max , nm) maxima of the prepared compounds in different solvents.…”

SPECTROSCOPIC STUDY OF EFFECTS OF TETRAALKYLAMMONIUM CATIONS ON F−-SENSING PROPERTIES OF CALIX[4]PYRROLE BORADIAZAINDACENE DYE

“…The quantum yield was determined to be 0.04 using rhodamine B (F = 0.49 in EtOH) as a standard. 24 Compared to the emission wavelength of parent BODIPY 1 (l em = 510 nm), that of 3 exhibits a red shift of approximately 110 nm, which reveals the ICT nature of the excited states of 3. The addition of TBA-F resulted in obvious fluorescence quenching at 623 nm and a 20-nm blue shift; these sensing events instantaneously occurred upon the addition of F - (Figure 2 inset).…”