Size-Dependent Properties of Oligothiophenes by Picosecond Time-Resolved Spectroscopy

Excess‐Electron Injection and Transfer in Terthiophene‐Modified DNA: Terthiophene as a Photosensitizing Electron Donor for Thymine, Cytosine, and Adenine

“…Figure 3 a shows the transient absorption spectra of dyads 1-4. In the case of compound 4, upon excitation, the spectrum exhibited an absorption band at 503 nm, which was assigned to the absorption band of 1 3T* [12] because the absorption band decayed with the same time constant as that of the fluorescence decay (120 ps) measured by the single-photon-counting method. During the decay of 1 3T*, an absorption band appeared at < 420 nm that was attributable to 3T in the triplet excited state ( 3 3T*).…”

Effect of bridge on energy transfer and photoinduced charge separation in perylene-diimide-naphthalene-bisimide-hexathiophene based donor-bridge-acceptor triads

“…2a-c). Features that absorb at 720 nm include the PDI radical anion [4][5][6][7] and the 6T triplet, which has an absorption maximum at 680 nm [8,9]. In PNR we observed that GSB of the PDI ground state at 540 nm persisted for longer than SE from the PDI excited state at 580 nm (shown in Fig.…”

“…Immediately following excitation of the hexathiophene (6T) at 400 nm, all three molecules exhibited an ESA in the range between 720 and 960 nm, which we ascribe to the ESA of 6T [8]. This feature decayed at a comparable rate to the appearance of GSB/SE signals at 540 nm (PDI GSB and SE) and 580 nm (only PDI SE), indicating energy transfer from 6T to PDI (Fig.…”

Metal Ion Modulated Torsion Angle in a Ditopic Oligothiophene Ligand: Toward Supramolecular Control of π Conjugation

“…[18] Two striking differences between spectra of 2 and 2·Ba 2 + are observed. First, the S 1 !S N absorption band at 720 nm in the spectrum of the complex has half the absorbance value of the free ligand.…”