A Bio‐inspired Approach for Chromophore Communication: Ligand‐to‐Ligand and Host‐to‐Guest Energy Transfer in Hybrid Crystalline Scaffolds. Issue 46 (17th September 2015)

• Record Type: Journal Article
• Authors: Dolgopolova, Ekaterina A.; Williams, Derek E.; Greytak, Andrew B.; Rice, Allison M.; Smith, Mark D.; Krause, Jeanette A.; Shustova, Natalia B.
• Is Part Of: Angewandte Chemie international edition. Volume 54:Issue 46(2015)
• Page Start: 13639
• Page End: 13643
• Publication Date: 2015-09-17
• Subjects: coordination polymers -- energy transfer -- fluorescence -- green fluorescent protein -- metal–organic frameworks; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201507400
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: Efficient multiple‐chromophore coupling in a crystalline metal–organic scaffold was achieved by mimicking a protein system possessing 100 % energy‐transfer (ET) efficiency between a green fluorescent protein variant and cytochrome b 562 . The two approaches developed for ET relied on the construction of coordination assemblies and host–guest coupling. Based on time‐resolved photoluminescence measurements in combination with calculations of the spectral overlap function and Förster radius, we demonstrated that both approaches resulted in a very high ET efficiency. In particular, the observed ligand‐to‐ligand ET efficiency value was the highest reported so far for two distinct ligands in a metal–organic framework. These studies provide important insights for the rational design of crystalline hybrid scaffolds consisting of a large ensemble of chromophore molecules with the capability of directional ET. Abstract : Energy pinball : Efficient chromophore coupling achieved in a protein scaffold was successfully mimicked by integration of chromophores inside metal–organic frameworks (MOFs). The ligand‐to‐ligand energy‐transfer (ET) efficiency calculated based on the experimental time‐resolved photoluminescence data was found to be the highest value achieved so far between two coordinatively immobilized ligands in a MOF matrix.