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Successive Photoswitching and Derivatization Effects in Photochromic Dithienylethene‐Based Coordination Cages.
- Source :
- ChemPhotoChem; Jun2019, Vol. 3 Issue 6, p378-383, 6p
- Publication Year :
- 2019
-
Abstract
- A new series of [Pd2(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 [Pd2(o‐L4)4], [Pd2(o‐L1)2(c‐L1)2] and [Pd2(c‐L1)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 [Pd2(o‐L1)4] than with the rigid closed cage [Pd2(c‐L1)4]. For the [B12F12]2− guest, thermodynamic data obtained from NMR experiments was compared to results from isothermal titration calorimetry (ITC). [ABSTRACT FROM AUTHOR]
- Subjects :
- DERIVATIZATION
PHOTOCHROMISM
SUPRAMOLECULAR chemistry
Subjects
Details
- Language :
- English
- ISSN :
- 23670932
- Volume :
- 3
- Issue :
- 6
- Database :
- Complementary Index
- Journal :
- ChemPhotoChem
- Publication Type :
- Academic Journal
- Accession number :
- 136999547
- Full Text :
- https://doi.org/10.1002/cptc.201900038