Picosecond timescale tracking of pentacene triplet excitons with chemical sensitivity
نویسندگان
چکیده
منابع مشابه
Triplet Excitons in Organic Materials
The theory of delayed fluorescence produced in an organic material by singlet excitation through an absorbing layer is given. It is shown, that it will be reduced by a factor la.2/ ( la .+ ls) 2 due to the singlet energy transfer to such a layer, where /a the penetration depth of the exciting irradiation and Zs the diffusion lenght of the singlets. Further reduction of delayed fluorescence shou...
متن کاملTriplet excitons in polyadenylic Acid.
1-Phenyl-2-benzoyl-8-azacycl(2.2.2)azine, VII.-Heating 450 mg of VI in a sublimation tube at 2400 caused rapid evolution of gas. The residue was taken up in a 2: 1 mixture of benzene-Skelly Solve B and chromatographed over alumina (Woelm, activity 3). The solid obtained from the first eluate fraction was recrystallized from an ether-Skelly Solve B mixture to give 312 mg of orange crystals, mp 1...
متن کاملPicosecond timescale Raman processes and spectroscopy
Time resolved properties of vibrational states of molecules on the picosecond scale are surveyed using both conventional spontaneous Raman effects as well as coherent Raman processes. In certain respects the coherent signal methods have been found to have distinct advantages related to their intrinsic time gating capability but they can have dis— advantages in the form of nonresonant background...
متن کاملEvidence of protein collective motions on the picosecond timescale.
We investigate the presence of structural collective motions on a picosecond timescale for the heme protein, cytochrome c, as a function of oxidation and hydration, using terahertz (THz) time domain spectroscopy and molecular dynamics simulations. The THz response dramatically increases with oxidation, with the largest increase for lowest hydrations, and highest frequencies. For both oxidation ...
متن کاملDavydov splitting in triplet excitons of tetracene single crystals
This work reports room temperature Davydov splitting in triplet transitions Tn ← T1 of tetracene single crystals. This was observed through femtosecond transient absorption spectroscopy with polarized ‖ b and ⊥ b probing on the (ab) face of the 300 nm thick crystal. A Davydov splitting of 0.04 eV (286 cm−1) was obtained on an excited state absorption signal ascribed to triplet excitons in Birec...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Communications Physics
سال: 2019
ISSN: 2399-3650
DOI: 10.1038/s42005-019-0157-1