Distinct photophysical behaviour and transport of cell-impermeable [Ru(bpy) 2 dppz] 2+ in live cells using cucurbit[7]uril as a delivery system.

Autor: Shinde MN; Department of Chemistry, Savitribai Phule Pune University, Pune-411 007, India. aak@chem.unipune.ac.in., Rao SS, Gejji SP, Kumbhar AA
Jazyk: angličtina
Zdroj: Dalton transactions (Cambridge, England : 2003) [Dalton Trans] 2018 Mar 12; Vol. 47 (11), pp. 3857-3863.
DOI: 10.1039/c7dt04230b
Abstrakt: Here, we report the delivery of a cell-impermeable [Ru(bpy) 2 dppz] 2+ complex across a cell membrane using a cucurbit[7]uril molecular container. Encapsulation of complex 1 in the cucurbit[7]uril cavity showed an 830-fold enhancement in the luminescence intensity of the non-emissive complex in aqueous solution. This molecular light-switch effect stems from the incorporation of the dppz ligand of 1 inside the CB7 cavity and can be attributed to long range coulombic forces between Ru 2+ and the carbonyl portal of CB7 via CHO interactions. This is reflected in the 1 H-NMR experiments, and further corroborated by theoretical calculations.
Databáze: MEDLINE