Abstract
Columnar stacks of N,N'-di(2-(trimethylammoniumiodide)ethylene) perylenediimide (TAIPDI) n can host meso-tetrakis(4-sulfonatophenyl) porphyrin zinc tetrapotassium salt (ZnTPPSK 4) molecules at different ratios through the ionic and π-π interactions prompted by an aqueous environment. Photoexcitation of this host-guest complex generates very fast charge separation (1.4 × 10 12 s -1). Charge recombination is markedly decelerated by a probable electron delocalization mechanism along the long-range of tightly stacked TAIPDIs (4.6 × 10 8 s -1), giving an exceptional k CS/k CR ratio of 3000 as determined by using time-resolved transient absorption techniques.
Original language | English |
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Pages (from-to) | 23274-23282 |
Number of pages | 9 |
Journal | Journal of Physical Chemistry C |
Volume | 116 |
Issue number | 44 |
DOIs | |
State | Published - 8 Nov 2012 |