Successive Photoswitching and Derivatization Effects in Photochromic Dithienylethene‐Based Coordination Cages
2019 | journal article. A publication with affiliation to the University of Göttingen.
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Successive Photoswitching and Derivatization Effects in Photochromic Dithienylethene‐Based Coordination Cages
Li, R.; Han, M.; Tessarolo, J.; Holstein, J. J. ; Lübben, J.; Dittrich, B. & Volkmann, C. et al. (2019)
ChemPhotoChem, 3(6) pp. 378-383. DOI: https://doi.org/10.1002/cptc.201900038
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Details
- Authors
- Li, Ru‐Jin; Han, Muxin; Tessarolo, Jacopo; Holstein, Julian J. ; Lübben, Jens; Dittrich, Birger ; Volkmann, Christian; Finze, Maik; Jenne, Carsten; Clever, Guido H.
- Abstract
- Abstract A new series of [Pd 2 ( L ) 4 ] cages based on photochromic dithienylethene (DTE) ligands allowed us to gain insight into the successive photoswitching of multiple DTE moieties in a confined metallo‐supramolecular assembly. Three new X‐ray structures of [Pd 2 ( o‐ L 4 ) 4 ], [Pd 2 ( o‐ L 1 ) 2 ( c‐ L 1 ) 2 ] and [Pd 2 ( c‐ L 1 ) 4 ] ( o‐ L and c‐ L = open and closed forms of DTE ligands, respectively) were obtained. The structures deliver snapshots of three different combinations of DTE photoisomeric states within the cage, facilitating a comparison of the all‐open with the all‐closed, and most notably, an intermediate form where open and closed switches co‐exist in the same cage. Moreover, a series of spherical anionic borate clusters was introduced in order to study their roles in the light‐controllable host–guest chemistry. The binding guests show higher affinities with the flexible open cage [Pd 2 ( o‐ L 1 ) 4 ] than with the rigid closed cage [Pd 2 ( c‐ L 1 ) 4 ]. For the [B 12 F 12 ] 2− guest, thermodynamic data obtained from NMR experiments was compared to results from isothermal titration calorimetry (ITC).
- Issue Date
- 2019
- Journal
- ChemPhotoChem
- ISSN
- 2367-0932
- eISSN
- 2367-0932
- ISSN
- 2367-0932
- eISSN
- 2367-0932
- Language
- English
- Sponsor
- Deutsche Forschungsgemeinschaft https://doi.org/10.13039/501100001659
European Research Council https://doi.org/10.13039/501100000781