Triplet energy transport in platinum-acetylide light harvesting arrays
Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review
Author(s)
Detail(s)
Original language | English |
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Pages (from-to) | 7198-7209 |
Journal / Publication | Journal of Physical Chemistry B |
Volume | 119 |
Issue number | 24 |
Publication status | Published - 18 Jun 2015 |
Externally published | Yes |
Link(s)
Abstract
Light harvesting and triplet energy transport is investigated in chromophore-functionalized polystyrene polymers featuring light harvesting and energy acceptor chromophores (traps) at varying loading. The series of precision polymers was constructed via reversible addition-fragmentation transfer polymerization and functionalized with platinum acetylide triplet chromophores by using an azide-alkyne "click" reaction. The polymers have narrow polydispersity and degree of polymerization ∼60. The chromophores have the general structure, trans-[-R-C6H4-C=C-Pt(PBu3)2-C=C-Ar], where R is the attachment point to the polystyrene backbone and Ar is either-C6H4-C=C-Ph or-pyrenyl (PE2-Pt and Py-Pt, respectively, with triplet energies of 2.35 and 1.88 eV). The polychromophores contain mainly the high-energy PE2-Pt units (light absorber and energy donor), with randomly distributed Py-Pt units (3-20% loading, energy acceptor). Photophysical methods are used to study the dynamics and efficiency of energy transport from the PE2-Pt to Py-Pt units in the polychromophores. The energy transfer efficiency is >90% for copolymers that contain 5% of the Py-Pt acceptor units. Time-resolved phosphorescence measurements combined with Monte Carlo exciton dynamics simulations suggest that the mechanism of exciton transport is exchange energy transfer hopping between PE2-Pt units.
Citation Format(s)
Triplet energy transport in platinum-acetylide light harvesting arrays. / Chen, Zhuo; Hsu, Hsien-Yi; Arca, Mert et al.
In: Journal of Physical Chemistry B, Vol. 119, No. 24, 18.06.2015, p. 7198-7209.Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review