Porphyrin-Anthracene Complexes: Potential in Triplet-Triplet Annihilation Upconversion
Artikel i vetenskaplig tidskrift, 2016

Triplet-triplet annihilation photon upconversion (TTA-UC) systems contain both an absorbing and an emitting molecule, the sensitizer and annihilator, respectively. Through a series of energy-transfer steps, two low frequency,photons can be combined into one high frequency photon. In organic solvents, the required energy transfer steps are limited by diffusion and are relatively efficient. In solid-state systems, however, the diffusion is slower, which usually results in lower efficiencies for these systems. An interesting way around this is to connect the sensitizer and annihilator. In order to increase understanding of the TTA-UC process in supramolecular systems, we synthesized four pyridine-substituted anthracene annihilators capable of coordinating axially to a zinc octaethylporphyrin sensitizer with a maximum binding constant of 6000 M-1 in toluene. This is a first example of a sensitizer-annihilator coordination complex for TTA-UC. Both the upconversion efficiency and the parasitic quenching of excited annihilator singlets by the sensitizer through Forster resonant energy transfer (FRET) were studied. On the basis of the findings herein, possible strategies for future supramolecular TTA systems with minimized FRET quenching are discussed.

polymer

arrays

matrix

charge

energy migration

Science & Technology - Other Topics

power

silicon solar-cells

chromophore

light

Materials Science

systems

Chemistry

Författare

Victor Gray

Kemi och kemiteknik, Tillämpad kemi, Polymerteknologi

Karl Börjesson

Göteborgs universitet

Damir Dzebo

Kemi och kemiteknik, Kemi och biokemi, Fysikalisk kemi

Maria Abrahamsson

Kemi och kemiteknik, Kemi och biokemi, Fysikalisk kemi

Bo Albinsson

Kemi och kemiteknik, Kemi och biokemi, Fysikalisk kemi

Kasper Moth-Poulsen

Kemi och kemiteknik, Tillämpad kemi, Polymerteknologi

Journal of Physical Chemistry C

1932-7447 (ISSN) 1932-7455 (eISSN)

Vol. 120 19018-19026

Styrkeområden

Nanovetenskap och nanoteknik

Energi

Materialvetenskap

Infrastruktur

Chalmers infrastruktur för masspektrometri

Chalmers materialanalyslaboratorium

Fundament

Grundläggande vetenskaper

Ämneskategorier

Kemiteknik

Kemi

DOI

10.1021/acs.jpcc.6b06298