Supramolecular chain-like polymers based on Ln(III) aqua complexes and cucurbit[6]uril

Supramolecular lanthanide assemblies with cucurbit[6]uril: from synthesis and crystal structure to application

“…This result is in good agreement with our previous data. 51 For complex 5 , the Weiss constant is very small | θ | < 0.1 K, thus implying a perfect paramagnetic behavior without detectable exchange or dipole–dipole interaction between Gd 3+ ions.…”

“…The solid samples of compound 7 exhibit two characteristic emission bands of Dy 3+ at 479 nm, 575 nm and a weak emission band 658 nm, resulting from the 4 F 9/2 → 6 H J ( J = 15/2, 13/2, and 11/2) transitions of the Dy 3+ ion, respectively. A weak broad band centered at 430 nm was registered as a result of luminescence of CB [6], 51 which proves the ineffective energy transfer. Scheme 2 shows the diagram of the relevant energy levels of Dy 3+ .…”