Authors: | Chen, Bin Holstein, Julian J. Horiuchi, Shinnosuke Hiller, Wolf G. Clever, Guido H. |
Title: | Pd(II) coordination sphere engineering: pyridine cages, quinoline bowls, and heteroleptic pills binding one or two fullerenes |
Language (ISO): | en |
Abstract: | Fullerenes and their derivatives are of tremendous technological relevance. Synthetic access and application are still hampered by tedious purification protocols, peculiar solubility, and limited control over regioselective derivatization. We present a modular self-assembly system based on a new low-molecular-weight binding motif, appended by two palladium(II)-coordinating units of different steric demands, to either form a [Pd2L14]4+ cage or an unprecedented [Pd2L23(MeCN)2]4+ bowl (with L1 = pyridyl, L2 = quinolinyl donors). The former was used as a selective induced-fit receptor for C60. The latter, owing to its more open structure, also allows binding of C70 and fullerene derivatives. By exposing only a fraction of the bound guests’ surface, the bowl acts as fullerene protecting group to control functionalization, as demonstrated by exclusive monoaddition of anthracene. In a hierarchical manner, sterically low-demanding dicarboxylates were found to bridge pairs of bowls into pill-shaped dimers, able to host two fullerenes. The hosts allow transferring bound fullerenes into a variety of organic solvents, extending the scope of possible derivatization and processing methodologies. |
Subject Headings: | Supramolecular chemistry Self assembly Coordination cage Coordination bowl Fullerene Functionalization Fullerene separation |
URI: | http://hdl.handle.net/2003/38133 http://dx.doi.org/10.17877/DE290R-20114 |
Issue Date: | 2019-05-08 |
Rights link: | https://creativecommons.org/licenses/by/4.0/ |
Appears in Collections: | Lehrstühle für Anorganische Chemie |
Files in This Item:
File | Description | Size | Format | |
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Chen_2019_jacs.9b02207-OA.pdf | 3.25 MB | Adobe PDF | View/Open |
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