Femtosecond to Microsecond Dynamics of Soret-Band Excited Corroles

Sai Santosh Kumar Raavi, Jun Yin, Giulia Grancini, Cesare Soci, Venugopal Rao Soma, Guglielmo Lanzani, Lingamallu Giribabu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

17 Citations (Scopus)

Abstract

We present a comprehensive photophysical investigation on a series of three corroles (TTC, P-TTC, Ge-TTC dissolved in toluene), employing femtosecond and nanosecond transient absorption spectroscopy (TAS) measurements. Systematic analyses of the TAS data determined the rates and corresponding time constants of photophysical processes: internal conversion (τIC) in the 898-525 fs range, vibrational relaxation in the 7.44-13.6 ps range, intersystem crossing in the 033-1.09 ns range, and triplet lifetime (τtriplet) in the 0.8-3.5 μs range. The estimated triplet quantum yields (Φtriplet) were in the 0.42-0.61 range. Comparatively, GeTTC displayed faster τIC and higher Φtriplet. Additionally, the time-dependent density functional theory calculations were performed for the three molecules. The HOMO/LUMO energy levels and the oscillator strengths of various transitions were determined and presented.

Original languageEnglish
Pages (from-to)28691-28700
Number of pages10
JournalJournal of Physical Chemistry C
Volume119
Issue number52
DOIs
Publication statusPublished - 31 Dec 2015

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

Cite this