Unraveling the Photophysics of zinc porphyrin oligomers

Unraveling the Photophysics of zinc porphyrin oligomers

Bibliographic Details
Parent link:Chemical Physics Letters.— .— Amsterdam: Elsevier Science Publishing Company Inc.
Vol. 870.— 2025.— Article number 142089, 9 p.
Other Authors: Valiulina L. Lenara, Khoroshkin K. Kirill, Valiev R. R. Rashid Rinatovich, Cherepanov V. N. Viktor Nikolaevich, Stepanova E. V. Elena Vladimirovna
Summary:Title screen
Photophysics of zinc (II)-porphyrin oligomers PZn(ethyne) (n = 2–5) was investigated computationally using TDDFT and CC2 methods. The excitation energies of the S1 state of porphyrin oligomers decrease from 16,400 cm−1 (n = 2) to 12,500 cm−1 (n = 5), while oscillator strength (S0 → S1) and radiative rate constant increase with n. The low fluorescence quantum yield for PZ2(ethyne) (1 %) is attributed to fast intersystem crossing (S1 → T2), driven by small energy gap (ΔE≈0.02 eV) and large spin-orbit coupling matrix element (5.4 cm−1). The energy gap () is influenced by meso-substituents, which can cause the quantum yield to vary by orders of magnitude
Текстовый файл
AM_Agreement
Language:English
Published: 2025
Subjects:
электронный ресурс
труды учёных ТПУ
Zn-porphyrin
Fluorescence quantum yield
Photophysics
Excitation energy
Spin–orbit coupling
Online Access:https://doi.org/10.1016/j.cplett.2025.142089
Format: Electronic Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=685156

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