Energy Transfer on Demand: Photoswitch-Directed Behavior of Metal–Porphyrin Frameworks

In this paper, a photochromic diarylethene-based derivative that is coordinatively immobilized within an extended porphyrin framework is shown to maintain its photoswitchable behavior and to direct the photophysical properties of the host. In particular, emission of a framework composed of bis(5-pyr...

Full description

Saved in:

Bibliographic Details
Published in:	Journal of the American Chemical Society Vol. 136; no. 34; pp. 11886 - 11889
Main Authors:	Williams, Derek E, Rietman, Joseph A, Maier, Josef M, Tan, Rui, Greytak, Andrew B, Smith, Mark D, Krause, Jeanette A, Shustova, Natalia B
Format:	Journal Article
Language:	English
Published:	United States American Chemical Society 27-08-2014
Subjects:	Energy Transfer Light Metalloporphyrins - chemistry Microscopy, Fluorescence Molecular Structure Organometallic Compounds - chemistry Photochemical Processes Porphyrins - chemistry Pyridines - chemistry Spectrometry, Fluorescence Stereoisomerism Thiophenes - chemistry X-Ray Diffraction Zinc - chemistry
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	In this paper, a photochromic diarylethene-based derivative that is coordinatively immobilized within an extended porphyrin framework is shown to maintain its photoswitchable behavior and to direct the photophysical properties of the host. In particular, emission of a framework composed of bis(5-pyridyl-2-methyl-3-thienyl)cyclopentene (BPMTC) and tetrakis(4-carboxyphenyl)porphyrin (H4TCPP) ligands anchored by Zn2+ ions can be altered as a function of incident light. We attribute the observed cyclic fluorescence behavior of the synthesized porphyrin–BPMTC array to activation of energy transfer (ET) pathways through BPMTC photoisomerization. Time-resolved photoluminescence measurements show a decrease in average porphyrin emission lifetime upon BPMTC insertion, consistent with an ET-based mechanism. These studies portend the possible utilization of photochromic ligands to direct chromophore behavior in large light-harvesting ensembles.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0002-7863 1520-5126
DOI:	10.1021/ja505589d