Accurate Prediction of the Excited States in the Fully Conjugated Porphyrin Tapes across the Full Spectral Range: A Story of the Interplay between π-π∗ and Intramolecular Charge-Transfer Transitions in Soft Chromophores

Rodion V. Belosludov, Dustin E. Nevonen, Victor N. Nemykin

Research output: Contribution to journalArticlepeer-review

Abstract

The ability of density functional theory (DFT) and time-dependent DFT (TDDFT) methods for the accurate prediction of the energies and oscillator strengths of the excited states in a series of fully conjugated meso-meso β-β β-β triple-linked porphyrin oligomers (porphyrin tapes 2-12) was probed in the gas phase and solution using several exchange-correlation functionals. It was demonstrated that the use of the hybrid B3LYP functional provides a good compromise for the accurate prediction of the localized π-π∗ and intramolecular charge-transfer transitions, thus allowing confident interpretation of the UV-vis-NIR spectra of porphyrin oligomers. The TDDFT-based sum-over-state (SOS) calculations for the porphyrin tape dimer 2 and trimer 3 as well as parent monomer 1 correctly predicted the signs and shapes of the magnetic circular dichroism (MCD) signals in the low-energy region of the spectra.

Original languageEnglish
Pages (from-to)2480-2491
Number of pages12
JournalJournal of Physical Chemistry A
Volume125
Issue number12
DOIs
Publication statusPublished - 2021 Apr 1

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Fingerprint

Dive into the research topics of 'Accurate Prediction of the Excited States in the Fully Conjugated Porphyrin Tapes across the Full Spectral Range: A Story of the Interplay between π-π∗ and Intramolecular Charge-Transfer Transitions in Soft Chromophores'. Together they form a unique fingerprint.

Cite this